summaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
authorTony Lindgren <tony@atomide.com>2010-12-23 02:08:05 +0300
committerTony Lindgren <tony@atomide.com>2010-12-23 02:08:05 +0300
commit1c4655651f1377297425525b250b2e4b5462015b (patch)
treed06ca3731ce50ca63914f175fa5c9accd51c2b13 /arch
parentf400c82efb474b2ccf01c796b60b36408f7845a3 (diff)
parentb35cecf978e33bf8f4be0f36ffe00fe10f381c4a (diff)
downloadlinux-1c4655651f1377297425525b250b2e4b5462015b.tar.xz
Merge branch 'pm-sr' of ssh://master.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into omap-for-linus
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-omap2/Makefile11
-rw-r--r--arch/arm/mach-omap2/control.h29
-rw-r--r--arch/arm/mach-omap2/omap_hwmod_3xxx_data.c175
-rw-r--r--arch/arm/mach-omap2/omap_hwmod_44xx_data.c168
-rw-r--r--arch/arm/mach-omap2/omap_twl.c277
-rw-r--r--arch/arm/mach-omap2/pm.c102
-rw-r--r--arch/arm/mach-omap2/pm.h28
-rw-r--r--arch/arm/mach-omap2/smartreflex-class3.c59
-rw-r--r--arch/arm/mach-omap2/smartreflex.c1029
-rw-r--r--arch/arm/mach-omap2/sr_device.c146
-rw-r--r--arch/arm/mach-omap2/voltage.c1571
-rw-r--r--arch/arm/plat-omap/Kconfig31
-rw-r--r--arch/arm/plat-omap/include/plat/omap_hwmod.h5
-rw-r--r--arch/arm/plat-omap/include/plat/smartreflex.h245
-rw-r--r--arch/arm/plat-omap/include/plat/voltage.h146
15 files changed, 4019 insertions, 3 deletions
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 1fce382a90a9..4ab82f6f15b1 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -18,6 +18,8 @@ obj-$(CONFIG_ARCH_OMAP4) += prm44xx.o $(hwmod-common)
obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o
+obj-$(CONFIG_TWL4030_CORE) += omap_twl.o
+
# SMP support ONLY available for OMAP4
obj-$(CONFIG_SMP) += omap-smp.o omap-headsmp.o
obj-$(CONFIG_LOCAL_TIMERS) += timer-mpu.o
@@ -57,10 +59,13 @@ endif
# Power Management
ifeq ($(CONFIG_PM),y)
obj-$(CONFIG_ARCH_OMAP2) += pm24xx.o
-obj-$(CONFIG_ARCH_OMAP2) += sleep24xx.o pm_bus.o
-obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o cpuidle34xx.o pm_bus.o
-obj-$(CONFIG_ARCH_OMAP4) += pm44xx.o pm_bus.o
+obj-$(CONFIG_ARCH_OMAP2) += sleep24xx.o pm_bus.o voltage.o
+obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o voltage.o \
+ cpuidle34xx.o pm_bus.o
+obj-$(CONFIG_ARCH_OMAP4) += pm44xx.o voltage.o pm_bus.o
obj-$(CONFIG_PM_DEBUG) += pm-debug.o
+obj-$(CONFIG_OMAP_SMARTREFLEX) += sr_device.o smartreflex.o
+obj-$(CONFIG_OMAP_SMARTREFLEX_CLASS3) += smartreflex-class3.o
AFLAGS_sleep24xx.o :=-Wa,-march=armv6
AFLAGS_sleep34xx.o :=-Wa,-march=armv7-a
diff --git a/arch/arm/mach-omap2/control.h b/arch/arm/mach-omap2/control.h
index 208a670c826b..f0629ae04102 100644
--- a/arch/arm/mach-omap2/control.h
+++ b/arch/arm/mach-omap2/control.h
@@ -148,6 +148,15 @@
#define OMAP343X_CONTROL_TEST_KEY_11 (OMAP2_CONTROL_GENERAL + 0x00f4)
#define OMAP343X_CONTROL_TEST_KEY_12 (OMAP2_CONTROL_GENERAL + 0x00f8)
#define OMAP343X_CONTROL_TEST_KEY_13 (OMAP2_CONTROL_GENERAL + 0x00fc)
+#define OMAP343X_CONTROL_FUSE_OPP1_VDD1 (OMAP2_CONTROL_GENERAL + 0x0110)
+#define OMAP343X_CONTROL_FUSE_OPP2_VDD1 (OMAP2_CONTROL_GENERAL + 0x0114)
+#define OMAP343X_CONTROL_FUSE_OPP3_VDD1 (OMAP2_CONTROL_GENERAL + 0x0118)
+#define OMAP343X_CONTROL_FUSE_OPP4_VDD1 (OMAP2_CONTROL_GENERAL + 0x011c)
+#define OMAP343X_CONTROL_FUSE_OPP5_VDD1 (OMAP2_CONTROL_GENERAL + 0x0120)
+#define OMAP343X_CONTROL_FUSE_OPP1_VDD2 (OMAP2_CONTROL_GENERAL + 0x0124)
+#define OMAP343X_CONTROL_FUSE_OPP2_VDD2 (OMAP2_CONTROL_GENERAL + 0x0128)
+#define OMAP343X_CONTROL_FUSE_OPP3_VDD2 (OMAP2_CONTROL_GENERAL + 0x012c)
+#define OMAP343X_CONTROL_FUSE_SR (OMAP2_CONTROL_GENERAL + 0x0130)
#define OMAP343X_CONTROL_IVA2_BOOTADDR (OMAP2_CONTROL_GENERAL + 0x0190)
#define OMAP343X_CONTROL_IVA2_BOOTMOD (OMAP2_CONTROL_GENERAL + 0x0194)
#define OMAP343X_CONTROL_DEBOBS(i) (OMAP2_CONTROL_GENERAL + 0x01B0 \
@@ -164,6 +173,26 @@
#define OMAP343X_CONTROL_SRAMLDO5 (OMAP2_CONTROL_GENERAL + 0x02C0)
#define OMAP343X_CONTROL_CSI (OMAP2_CONTROL_GENERAL + 0x02C4)
+/* OMAP3630 only CONTROL_GENERAL register offsets */
+#define OMAP3630_CONTROL_FUSE_OPP1G_VDD1 (OMAP2_CONTROL_GENERAL + 0x0110)
+#define OMAP3630_CONTROL_FUSE_OPP50_VDD1 (OMAP2_CONTROL_GENERAL + 0x0114)
+#define OMAP3630_CONTROL_FUSE_OPP100_VDD1 (OMAP2_CONTROL_GENERAL + 0x0118)
+#define OMAP3630_CONTROL_FUSE_OPP120_VDD1 (OMAP2_CONTROL_GENERAL + 0x0120)
+#define OMAP3630_CONTROL_FUSE_OPP50_VDD2 (OMAP2_CONTROL_GENERAL + 0x0128)
+#define OMAP3630_CONTROL_FUSE_OPP100_VDD2 (OMAP2_CONTROL_GENERAL + 0x012C)
+
+/* OMAP44xx control efuse offsets */
+#define OMAP44XX_CONTROL_FUSE_IVA_OPP50 0x22C
+#define OMAP44XX_CONTROL_FUSE_IVA_OPP100 0x22F
+#define OMAP44XX_CONTROL_FUSE_IVA_OPPTURBO 0x232
+#define OMAP44XX_CONTROL_FUSE_IVA_OPPNITRO 0x235
+#define OMAP44XX_CONTROL_FUSE_MPU_OPP50 0x240
+#define OMAP44XX_CONTROL_FUSE_MPU_OPP100 0x243
+#define OMAP44XX_CONTROL_FUSE_MPU_OPPTURBO 0x246
+#define OMAP44XX_CONTROL_FUSE_MPU_OPPNITRO 0x249
+#define OMAP44XX_CONTROL_FUSE_CORE_OPP50 0x254
+#define OMAP44XX_CONTROL_FUSE_CORE_OPP100 0x257
+
/* AM35XX only CONTROL_GENERAL register offsets */
#define AM35XX_CONTROL_MSUSPENDMUX_6 (OMAP2_CONTROL_GENERAL + 0x0038)
#define AM35XX_CONTROL_DEVCONF2 (OMAP2_CONTROL_GENERAL + 0x0310)
diff --git a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
index 89a943e9459c..8d8181334f86 100644
--- a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
@@ -21,6 +21,7 @@
#include <plat/l4_3xxx.h>
#include <plat/i2c.h>
#include <plat/gpio.h>
+#include <plat/smartreflex.h>
#include "omap_hwmod_common_data.h"
@@ -52,6 +53,8 @@ static struct omap_hwmod omap3xxx_gpio3_hwmod;
static struct omap_hwmod omap3xxx_gpio4_hwmod;
static struct omap_hwmod omap3xxx_gpio5_hwmod;
static struct omap_hwmod omap3xxx_gpio6_hwmod;
+static struct omap_hwmod omap34xx_sr1_hwmod;
+static struct omap_hwmod omap34xx_sr2_hwmod;
static struct omap_hwmod omap3xxx_dma_system_hwmod;
@@ -262,9 +265,47 @@ static struct omap_hwmod_ocp_if omap3_l4_core__i2c3 = {
.user = OCP_USER_MPU | OCP_USER_SDMA,
};
+/* L4 CORE -> SR1 interface */
+static struct omap_hwmod_addr_space omap3_sr1_addr_space[] = {
+ {
+ .pa_start = OMAP34XX_SR1_BASE,
+ .pa_end = OMAP34XX_SR1_BASE + SZ_1K - 1,
+ .flags = ADDR_TYPE_RT,
+ },
+};
+
+static struct omap_hwmod_ocp_if omap3_l4_core__sr1 = {
+ .master = &omap3xxx_l4_core_hwmod,
+ .slave = &omap34xx_sr1_hwmod,
+ .clk = "sr_l4_ick",
+ .addr = omap3_sr1_addr_space,
+ .addr_cnt = ARRAY_SIZE(omap3_sr1_addr_space),
+ .user = OCP_USER_MPU,
+};
+
+/* L4 CORE -> SR1 interface */
+static struct omap_hwmod_addr_space omap3_sr2_addr_space[] = {
+ {
+ .pa_start = OMAP34XX_SR2_BASE,
+ .pa_end = OMAP34XX_SR2_BASE + SZ_1K - 1,
+ .flags = ADDR_TYPE_RT,
+ },
+};
+
+static struct omap_hwmod_ocp_if omap3_l4_core__sr2 = {
+ .master = &omap3xxx_l4_core_hwmod,
+ .slave = &omap34xx_sr2_hwmod,
+ .clk = "sr_l4_ick",
+ .addr = omap3_sr2_addr_space,
+ .addr_cnt = ARRAY_SIZE(omap3_sr2_addr_space),
+ .user = OCP_USER_MPU,
+};
+
/* Slave interfaces on the L4_CORE interconnect */
static struct omap_hwmod_ocp_if *omap3xxx_l4_core_slaves[] = {
&omap3xxx_l3_main__l4_core,
+ &omap3_l4_core__sr1,
+ &omap3_l4_core__sr2,
};
/* Master interfaces on the L4_CORE interconnect */
@@ -1186,6 +1227,135 @@ static struct omap_hwmod omap3xxx_dma_system_hwmod = {
.flags = HWMOD_NO_IDLEST,
};
+/* SR common */
+static struct omap_hwmod_sysc_fields omap34xx_sr_sysc_fields = {
+ .clkact_shift = 20,
+};
+
+static struct omap_hwmod_class_sysconfig omap34xx_sr_sysc = {
+ .sysc_offs = 0x24,
+ .sysc_flags = (SYSC_HAS_CLOCKACTIVITY | SYSC_NO_CACHE),
+ .clockact = CLOCKACT_TEST_ICLK,
+ .sysc_fields = &omap34xx_sr_sysc_fields,
+};
+
+static struct omap_hwmod_class omap34xx_smartreflex_hwmod_class = {
+ .name = "smartreflex",
+ .sysc = &omap34xx_sr_sysc,
+ .rev = 1,
+};
+
+static struct omap_hwmod_sysc_fields omap36xx_sr_sysc_fields = {
+ .sidle_shift = 24,
+ .enwkup_shift = 26
+};
+
+static struct omap_hwmod_class_sysconfig omap36xx_sr_sysc = {
+ .sysc_offs = 0x38,
+ .idlemodes = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART),
+ .sysc_flags = (SYSC_HAS_SIDLEMODE | SYSC_HAS_ENAWAKEUP |
+ SYSC_NO_CACHE),
+ .sysc_fields = &omap36xx_sr_sysc_fields,
+};
+
+static struct omap_hwmod_class omap36xx_smartreflex_hwmod_class = {
+ .name = "smartreflex",
+ .sysc = &omap36xx_sr_sysc,
+ .rev = 2,
+};
+
+/* SR1 */
+static struct omap_hwmod_ocp_if *omap3_sr1_slaves[] = {
+ &omap3_l4_core__sr1,
+};
+
+static struct omap_hwmod omap34xx_sr1_hwmod = {
+ .name = "sr1_hwmod",
+ .class = &omap34xx_smartreflex_hwmod_class,
+ .main_clk = "sr1_fck",
+ .vdd_name = "mpu",
+ .prcm = {
+ .omap2 = {
+ .prcm_reg_id = 1,
+ .module_bit = OMAP3430_EN_SR1_SHIFT,
+ .module_offs = WKUP_MOD,
+ .idlest_reg_id = 1,
+ .idlest_idle_bit = OMAP3430_EN_SR1_SHIFT,
+ },
+ },
+ .slaves = omap3_sr1_slaves,
+ .slaves_cnt = ARRAY_SIZE(omap3_sr1_slaves),
+ .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430ES2 |
+ CHIP_IS_OMAP3430ES3_0 |
+ CHIP_IS_OMAP3430ES3_1),
+ .flags = HWMOD_SET_DEFAULT_CLOCKACT,
+};
+
+static struct omap_hwmod omap36xx_sr1_hwmod = {
+ .name = "sr1_hwmod",
+ .class = &omap36xx_smartreflex_hwmod_class,
+ .main_clk = "sr1_fck",
+ .vdd_name = "mpu",
+ .prcm = {
+ .omap2 = {
+ .prcm_reg_id = 1,
+ .module_bit = OMAP3430_EN_SR1_SHIFT,
+ .module_offs = WKUP_MOD,
+ .idlest_reg_id = 1,
+ .idlest_idle_bit = OMAP3430_EN_SR1_SHIFT,
+ },
+ },
+ .slaves = omap3_sr1_slaves,
+ .slaves_cnt = ARRAY_SIZE(omap3_sr1_slaves),
+ .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3630ES1),
+};
+
+/* SR2 */
+static struct omap_hwmod_ocp_if *omap3_sr2_slaves[] = {
+ &omap3_l4_core__sr2,
+};
+
+static struct omap_hwmod omap34xx_sr2_hwmod = {
+ .name = "sr2_hwmod",
+ .class = &omap34xx_smartreflex_hwmod_class,
+ .main_clk = "sr2_fck",
+ .vdd_name = "core",
+ .prcm = {
+ .omap2 = {
+ .prcm_reg_id = 1,
+ .module_bit = OMAP3430_EN_SR2_SHIFT,
+ .module_offs = WKUP_MOD,
+ .idlest_reg_id = 1,
+ .idlest_idle_bit = OMAP3430_EN_SR2_SHIFT,
+ },
+ },
+ .slaves = omap3_sr2_slaves,
+ .slaves_cnt = ARRAY_SIZE(omap3_sr2_slaves),
+ .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430ES2 |
+ CHIP_IS_OMAP3430ES3_0 |
+ CHIP_IS_OMAP3430ES3_1),
+ .flags = HWMOD_SET_DEFAULT_CLOCKACT,
+};
+
+static struct omap_hwmod omap36xx_sr2_hwmod = {
+ .name = "sr2_hwmod",
+ .class = &omap36xx_smartreflex_hwmod_class,
+ .main_clk = "sr2_fck",
+ .vdd_name = "core",
+ .prcm = {
+ .omap2 = {
+ .prcm_reg_id = 1,
+ .module_bit = OMAP3430_EN_SR2_SHIFT,
+ .module_offs = WKUP_MOD,
+ .idlest_reg_id = 1,
+ .idlest_idle_bit = OMAP3430_EN_SR2_SHIFT,
+ },
+ },
+ .slaves = omap3_sr2_slaves,
+ .slaves_cnt = ARRAY_SIZE(omap3_sr2_slaves),
+ .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3630ES1),
+};
+
static __initdata struct omap_hwmod *omap3xxx_hwmods[] = {
&omap3xxx_l3_main_hwmod,
&omap3xxx_l4_core_hwmod,
@@ -1201,6 +1371,11 @@ static __initdata struct omap_hwmod *omap3xxx_hwmods[] = {
&omap3xxx_i2c1_hwmod,
&omap3xxx_i2c2_hwmod,
&omap3xxx_i2c3_hwmod,
+ &omap34xx_sr1_hwmod,
+ &omap34xx_sr2_hwmod,
+ &omap36xx_sr1_hwmod,
+ &omap36xx_sr2_hwmod,
+
/* gpio class */
&omap3xxx_gpio1_hwmod,
diff --git a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
index c9c98ee81191..e2ad1b6b9c0a 100644
--- a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
@@ -1842,6 +1842,169 @@ static struct omap_hwmod omap44xx_dma_system_hwmod = {
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
};
+/*
+ * 'smartreflex' class
+ * smartreflex module (monitor silicon performance and outputs a measure of
+ * performance error)
+ */
+
+/* The IP is not compliant to type1 / type2 scheme */
+static struct omap_hwmod_sysc_fields omap_hwmod_sysc_type_smartreflex = {
+ .sidle_shift = 24,
+ .enwkup_shift = 26,
+};
+
+static struct omap_hwmod_class_sysconfig omap44xx_smartreflex_sysc = {
+ .sysc_offs = 0x0038,
+ .sysc_flags = (SYSC_HAS_ENAWAKEUP | SYSC_HAS_SIDLEMODE),
+ .idlemodes = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART),
+ .sysc_fields = &omap_hwmod_sysc_type_smartreflex,
+};
+
+static struct omap_hwmod_class omap44xx_smartreflex_hwmod_class = {
+ .name = "smartreflex",
+ .sysc = &omap44xx_smartreflex_sysc,
+ .rev = 2,
+};
+
+/* smartreflex_core */
+static struct omap_hwmod omap44xx_smartreflex_core_hwmod;
+static struct omap_hwmod_irq_info omap44xx_smartreflex_core_irqs[] = {
+ { .irq = 19 + OMAP44XX_IRQ_GIC_START },
+};
+
+static struct omap_hwmod_addr_space omap44xx_smartreflex_core_addrs[] = {
+ {
+ .pa_start = 0x4a0dd000,
+ .pa_end = 0x4a0dd03f,
+ .flags = ADDR_TYPE_RT
+ },
+};
+
+/* l4_cfg -> smartreflex_core */
+static struct omap_hwmod_ocp_if omap44xx_l4_cfg__smartreflex_core = {
+ .master = &omap44xx_l4_cfg_hwmod,
+ .slave = &omap44xx_smartreflex_core_hwmod,
+ .clk = "l4_div_ck",
+ .addr = omap44xx_smartreflex_core_addrs,
+ .addr_cnt = ARRAY_SIZE(omap44xx_smartreflex_core_addrs),
+ .user = OCP_USER_MPU | OCP_USER_SDMA,
+};
+
+/* smartreflex_core slave ports */
+static struct omap_hwmod_ocp_if *omap44xx_smartreflex_core_slaves[] = {
+ &omap44xx_l4_cfg__smartreflex_core,
+};
+
+static struct omap_hwmod omap44xx_smartreflex_core_hwmod = {
+ .name = "smartreflex_core",
+ .class = &omap44xx_smartreflex_hwmod_class,
+ .mpu_irqs = omap44xx_smartreflex_core_irqs,
+ .mpu_irqs_cnt = ARRAY_SIZE(omap44xx_smartreflex_core_irqs),
+ .main_clk = "smartreflex_core_fck",
+ .vdd_name = "core",
+ .prcm = {
+ .omap4 = {
+ .clkctrl_reg = OMAP4430_CM_ALWON_SR_CORE_CLKCTRL,
+ },
+ },
+ .slaves = omap44xx_smartreflex_core_slaves,
+ .slaves_cnt = ARRAY_SIZE(omap44xx_smartreflex_core_slaves),
+ .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
+};
+
+/* smartreflex_iva */
+static struct omap_hwmod omap44xx_smartreflex_iva_hwmod;
+static struct omap_hwmod_irq_info omap44xx_smartreflex_iva_irqs[] = {
+ { .irq = 102 + OMAP44XX_IRQ_GIC_START },
+};
+
+static struct omap_hwmod_addr_space omap44xx_smartreflex_iva_addrs[] = {
+ {
+ .pa_start = 0x4a0db000,
+ .pa_end = 0x4a0db03f,
+ .flags = ADDR_TYPE_RT
+ },
+};
+
+/* l4_cfg -> smartreflex_iva */
+static struct omap_hwmod_ocp_if omap44xx_l4_cfg__smartreflex_iva = {
+ .master = &omap44xx_l4_cfg_hwmod,
+ .slave = &omap44xx_smartreflex_iva_hwmod,
+ .clk = "l4_div_ck",
+ .addr = omap44xx_smartreflex_iva_addrs,
+ .addr_cnt = ARRAY_SIZE(omap44xx_smartreflex_iva_addrs),
+ .user = OCP_USER_MPU | OCP_USER_SDMA,
+};
+
+/* smartreflex_iva slave ports */
+static struct omap_hwmod_ocp_if *omap44xx_smartreflex_iva_slaves[] = {
+ &omap44xx_l4_cfg__smartreflex_iva,
+};
+
+static struct omap_hwmod omap44xx_smartreflex_iva_hwmod = {
+ .name = "smartreflex_iva",
+ .class = &omap44xx_smartreflex_hwmod_class,
+ .mpu_irqs = omap44xx_smartreflex_iva_irqs,
+ .mpu_irqs_cnt = ARRAY_SIZE(omap44xx_smartreflex_iva_irqs),
+ .main_clk = "smartreflex_iva_fck",
+ .vdd_name = "iva",
+ .prcm = {
+ .omap4 = {
+ .clkctrl_reg = OMAP4430_CM_ALWON_SR_IVA_CLKCTRL,
+ },
+ },
+ .slaves = omap44xx_smartreflex_iva_slaves,
+ .slaves_cnt = ARRAY_SIZE(omap44xx_smartreflex_iva_slaves),
+ .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
+};
+
+/* smartreflex_mpu */
+static struct omap_hwmod omap44xx_smartreflex_mpu_hwmod;
+static struct omap_hwmod_irq_info omap44xx_smartreflex_mpu_irqs[] = {
+ { .irq = 18 + OMAP44XX_IRQ_GIC_START },
+};
+
+static struct omap_hwmod_addr_space omap44xx_smartreflex_mpu_addrs[] = {
+ {
+ .pa_start = 0x4a0d9000,
+ .pa_end = 0x4a0d903f,
+ .flags = ADDR_TYPE_RT
+ },
+};
+
+/* l4_cfg -> smartreflex_mpu */
+static struct omap_hwmod_ocp_if omap44xx_l4_cfg__smartreflex_mpu = {
+ .master = &omap44xx_l4_cfg_hwmod,
+ .slave = &omap44xx_smartreflex_mpu_hwmod,
+ .clk = "l4_div_ck",
+ .addr = omap44xx_smartreflex_mpu_addrs,
+ .addr_cnt = ARRAY_SIZE(omap44xx_smartreflex_mpu_addrs),
+ .user = OCP_USER_MPU | OCP_USER_SDMA,
+};
+
+/* smartreflex_mpu slave ports */
+static struct omap_hwmod_ocp_if *omap44xx_smartreflex_mpu_slaves[] = {
+ &omap44xx_l4_cfg__smartreflex_mpu,
+};
+
+static struct omap_hwmod omap44xx_smartreflex_mpu_hwmod = {
+ .name = "smartreflex_mpu",
+ .class = &omap44xx_smartreflex_hwmod_class,
+ .mpu_irqs = omap44xx_smartreflex_mpu_irqs,
+ .mpu_irqs_cnt = ARRAY_SIZE(omap44xx_smartreflex_mpu_irqs),
+ .main_clk = "smartreflex_mpu_fck",
+ .vdd_name = "mpu",
+ .prcm = {
+ .omap4 = {
+ .clkctrl_reg = OMAP4430_CM_ALWON_SR_MPU_CLKCTRL,
+ },
+ },
+ .slaves = omap44xx_smartreflex_mpu_slaves,
+ .slaves_cnt = ARRAY_SIZE(omap44xx_smartreflex_mpu_slaves),
+ .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
+};
+
static __initdata struct omap_hwmod *omap44xx_hwmods[] = {
/* dmm class */
&omap44xx_dmm_hwmod,
@@ -1903,6 +2066,11 @@ static __initdata struct omap_hwmod *omap44xx_hwmods[] = {
&omap44xx_wd_timer2_hwmod,
&omap44xx_wd_timer3_hwmod,
+ /* smartreflex class */
+ &omap44xx_smartreflex_core_hwmod,
+ &omap44xx_smartreflex_iva_hwmod,
+ &omap44xx_smartreflex_mpu_hwmod,
+
NULL,
};
diff --git a/arch/arm/mach-omap2/omap_twl.c b/arch/arm/mach-omap2/omap_twl.c
new file mode 100644
index 000000000000..15f8c6c1bb0f
--- /dev/null
+++ b/arch/arm/mach-omap2/omap_twl.c
@@ -0,0 +1,277 @@
+/**
+ * OMAP and TWL PMIC specific intializations.
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated.
+ * Thara Gopinath
+ * Copyright (C) 2009 Texas Instruments Incorporated.
+ * Nishanth Menon
+ * Copyright (C) 2009 Nokia Corporation
+ * Paul Walmsley
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/i2c/twl.h>
+
+#include <plat/voltage.h>
+
+#define OMAP3_SRI2C_SLAVE_ADDR 0x12
+#define OMAP3_VDD_MPU_SR_CONTROL_REG 0x00
+#define OMAP3_VDD_CORE_SR_CONTROL_REG 0x01
+#define OMAP3_VP_CONFIG_ERROROFFSET 0x00
+#define OMAP3_VP_VSTEPMIN_VSTEPMIN 0x1
+#define OMAP3_VP_VSTEPMAX_VSTEPMAX 0x04
+#define OMAP3_VP_VLIMITTO_TIMEOUT_US 200
+
+#define OMAP3430_VP1_VLIMITTO_VDDMIN 0x14
+#define OMAP3430_VP1_VLIMITTO_VDDMAX 0x42
+#define OMAP3430_VP2_VLIMITTO_VDDMIN 0x18
+#define OMAP3430_VP2_VLIMITTO_VDDMAX 0x2c
+
+#define OMAP3630_VP1_VLIMITTO_VDDMIN 0x18
+#define OMAP3630_VP1_VLIMITTO_VDDMAX 0x3c
+#define OMAP3630_VP2_VLIMITTO_VDDMIN 0x18
+#define OMAP3630_VP2_VLIMITTO_VDDMAX 0x30
+
+#define OMAP4_SRI2C_SLAVE_ADDR 0x12
+#define OMAP4_VDD_MPU_SR_VOLT_REG 0x55
+#define OMAP4_VDD_IVA_SR_VOLT_REG 0x5B
+#define OMAP4_VDD_CORE_SR_VOLT_REG 0x61
+
+#define OMAP4_VP_CONFIG_ERROROFFSET 0x00
+#define OMAP4_VP_VSTEPMIN_VSTEPMIN 0x01
+#define OMAP4_VP_VSTEPMAX_VSTEPMAX 0x04
+#define OMAP4_VP_VLIMITTO_TIMEOUT_US 200
+
+#define OMAP4_VP_MPU_VLIMITTO_VDDMIN 0xA
+#define OMAP4_VP_MPU_VLIMITTO_VDDMAX 0x39
+#define OMAP4_VP_IVA_VLIMITTO_VDDMIN 0xA
+#define OMAP4_VP_IVA_VLIMITTO_VDDMAX 0x2D
+#define OMAP4_VP_CORE_VLIMITTO_VDDMIN 0xA
+#define OMAP4_VP_CORE_VLIMITTO_VDDMAX 0x28
+
+static bool is_offset_valid;
+static u8 smps_offset;
+
+#define REG_SMPS_OFFSET 0xE0
+
+unsigned long twl4030_vsel_to_uv(const u8 vsel)
+{
+ return (((vsel * 125) + 6000)) * 100;
+}
+
+u8 twl4030_uv_to_vsel(unsigned long uv)
+{
+ return DIV_ROUND_UP(uv - 600000, 12500);
+}
+
+unsigned long twl6030_vsel_to_uv(const u8 vsel)
+{
+ /*
+ * In TWL6030 depending on the value of SMPS_OFFSET
+ * efuse register the voltage range supported in
+ * standard mode can be either between 0.6V - 1.3V or
+ * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
+ * is programmed to all 0's where as starting from
+ * TWL6030 ES1.1 the efuse is programmed to 1
+ */
+ if (!is_offset_valid) {
+ twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
+ REG_SMPS_OFFSET);
+ is_offset_valid = true;
+ }
+
+ /*
+ * There is no specific formula for voltage to vsel
+ * conversion above 1.3V. There are special hardcoded
+ * values for voltages above 1.3V. Currently we are
+ * hardcoding only for 1.35 V which is used for 1GH OPP for
+ * OMAP4430.
+ */
+ if (vsel == 0x3A)
+ return 1350000;
+
+ if (smps_offset & 0x8)
+ return ((((vsel - 1) * 125) + 7000)) * 100;
+ else
+ return ((((vsel - 1) * 125) + 6000)) * 100;
+}
+
+u8 twl6030_uv_to_vsel(unsigned long uv)
+{
+ /*
+ * In TWL6030 depending on the value of SMPS_OFFSET
+ * efuse register the voltage range supported in
+ * standard mode can be either between 0.6V - 1.3V or
+ * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
+ * is programmed to all 0's where as starting from
+ * TWL6030 ES1.1 the efuse is programmed to 1
+ */
+ if (!is_offset_valid) {
+ twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
+ REG_SMPS_OFFSET);
+ is_offset_valid = true;
+ }
+
+ /*
+ * There is no specific formula for voltage to vsel
+ * conversion above 1.3V. There are special hardcoded
+ * values for voltages above 1.3V. Currently we are
+ * hardcoding only for 1.35 V which is used for 1GH OPP for
+ * OMAP4430.
+ */
+ if (uv == 1350000)
+ return 0x3A;
+
+ if (smps_offset & 0x8)
+ return DIV_ROUND_UP(uv - 700000, 12500) + 1;
+ else
+ return DIV_ROUND_UP(uv - 600000, 12500) + 1;
+}
+
+static struct omap_volt_pmic_info omap3_mpu_volt_info = {
+ .slew_rate = 4000,
+ .step_size = 12500,
+ .on_volt = 1200000,
+ .onlp_volt = 1000000,
+ .ret_volt = 975000,
+ .off_volt = 600000,
+ .volt_setup_time = 0xfff,
+ .vp_erroroffset = OMAP3_VP_CONFIG_ERROROFFSET,
+ .vp_vstepmin = OMAP3_VP_VSTEPMIN_VSTEPMIN,
+ .vp_vstepmax = OMAP3_VP_VSTEPMAX_VSTEPMAX,
+ .vp_vddmin = OMAP3430_VP1_VLIMITTO_VDDMIN,
+ .vp_vddmax = OMAP3430_VP1_VLIMITTO_VDDMAX,
+ .vp_timeout_us = OMAP3_VP_VLIMITTO_TIMEOUT_US,
+ .i2c_slave_addr = OMAP3_SRI2C_SLAVE_ADDR,
+ .pmic_reg = OMAP3_VDD_MPU_SR_CONTROL_REG,
+ .vsel_to_uv = twl4030_vsel_to_uv,
+ .uv_to_vsel = twl4030_uv_to_vsel,
+};
+
+static struct omap_volt_pmic_info omap3_core_volt_info = {
+ .slew_rate = 4000,
+ .step_size = 12500,
+ .on_volt = 1200000,
+ .onlp_volt = 1000000,
+ .ret_volt = 975000,
+ .off_volt = 600000,
+ .volt_setup_time = 0xfff,
+ .vp_erroroffset = OMAP3_VP_CONFIG_ERROROFFSET,
+ .vp_vstepmin = OMAP3_VP_VSTEPMIN_VSTEPMIN,
+ .vp_vstepmax = OMAP3_VP_VSTEPMAX_VSTEPMAX,
+ .vp_vddmin = OMAP3430_VP2_VLIMITTO_VDDMIN,
+ .vp_vddmax = OMAP3430_VP2_VLIMITTO_VDDMAX,
+ .vp_timeout_us = OMAP3_VP_VLIMITTO_TIMEOUT_US,
+ .i2c_slave_addr = OMAP3_SRI2C_SLAVE_ADDR,
+ .pmic_reg = OMAP3_VDD_CORE_SR_CONTROL_REG,
+ .vsel_to_uv = twl4030_vsel_to_uv,
+ .uv_to_vsel = twl4030_uv_to_vsel,
+};
+
+static struct omap_volt_pmic_info omap4_mpu_volt_info = {
+ .slew_rate = 4000,
+ .step_size = 12500,
+ .on_volt = 1350000,
+ .onlp_volt = 1350000,
+ .ret_volt = 837500,
+ .off_volt = 600000,
+ .volt_setup_time = 0,
+ .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
+ .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
+ .vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
+ .vp_vddmin = OMAP4_VP_MPU_VLIMITTO_VDDMIN,
+ .vp_vddmax = OMAP4_VP_MPU_VLIMITTO_VDDMAX,
+ .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
+ .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR,
+ .pmic_reg = OMAP4_VDD_MPU_SR_VOLT_REG,
+ .vsel_to_uv = twl6030_vsel_to_uv,
+ .uv_to_vsel = twl6030_uv_to_vsel,
+};
+
+static struct omap_volt_pmic_info omap4_iva_volt_info = {
+ .slew_rate = 4000,
+ .step_size = 12500,
+ .on_volt = 1100000,
+ .onlp_volt = 1100000,
+ .ret_volt = 837500,
+ .off_volt = 600000,
+ .volt_setup_time = 0,
+ .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
+ .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
+ .vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
+ .vp_vddmin = OMAP4_VP_IVA_VLIMITTO_VDDMIN,
+ .vp_vddmax = OMAP4_VP_IVA_VLIMITTO_VDDMAX,
+ .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
+ .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR,
+ .pmic_reg = OMAP4_VDD_IVA_SR_VOLT_REG,
+ .vsel_to_uv = twl6030_vsel_to_uv,
+ .uv_to_vsel = twl6030_uv_to_vsel,
+};
+
+static struct omap_volt_pmic_info omap4_core_volt_info = {
+ .slew_rate = 4000,
+ .step_size = 12500,
+ .on_volt = 1100000,
+ .onlp_volt = 1100000,
+ .ret_volt = 837500,
+ .off_volt = 600000,
+ .volt_setup_time = 0,
+ .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
+ .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
+ .vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
+ .vp_vddmin = OMAP4_VP_CORE_VLIMITTO_VDDMIN,
+ .vp_vddmax = OMAP4_VP_CORE_VLIMITTO_VDDMAX,
+ .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
+ .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR,
+ .pmic_reg = OMAP4_VDD_CORE_SR_VOLT_REG,
+ .vsel_to_uv = twl6030_vsel_to_uv,
+ .uv_to_vsel = twl6030_uv_to_vsel,
+};
+
+int __init omap4_twl_init(void)
+{
+ struct voltagedomain *voltdm;
+
+ if (!cpu_is_omap44xx())
+ return -ENODEV;
+
+ voltdm = omap_voltage_domain_lookup("mpu");
+ omap_voltage_register_pmic(voltdm, &omap4_mpu_volt_info);
+
+ voltdm = omap_voltage_domain_lookup("iva");
+ omap_voltage_register_pmic(voltdm, &omap4_iva_volt_info);
+
+ voltdm = omap_voltage_domain_lookup("core");
+ omap_voltage_register_pmic(voltdm, &omap4_core_volt_info);
+
+ return 0;
+}
+
+int __init omap3_twl_init(void)
+{
+ struct voltagedomain *voltdm;
+
+ if (!cpu_is_omap34xx())
+ return -ENODEV;
+
+ if (cpu_is_omap3630()) {
+ omap3_mpu_volt_info.vp_vddmin = OMAP3630_VP1_VLIMITTO_VDDMIN;
+ omap3_mpu_volt_info.vp_vddmax = OMAP3630_VP1_VLIMITTO_VDDMAX;
+ omap3_core_volt_info.vp_vddmin = OMAP3630_VP2_VLIMITTO_VDDMIN;
+ omap3_core_volt_info.vp_vddmax = OMAP3630_VP2_VLIMITTO_VDDMAX;
+ }
+
+ voltdm = omap_voltage_domain_lookup("mpu");
+ omap_voltage_register_pmic(voltdm, &omap3_mpu_volt_info);
+
+ voltdm = omap_voltage_domain_lookup("core");
+ omap_voltage_register_pmic(voltdm, &omap3_core_volt_info);
+
+ return 0;
+}
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
index 9b1db592759f..d5a102c71989 100644
--- a/arch/arm/mach-omap2/pm.c
+++ b/arch/arm/mach-omap2/pm.c
@@ -13,13 +13,16 @@
#include <linux/init.h>
#include <linux/io.h>
#include <linux/err.h>
+#include <linux/opp.h>
#include <plat/omap-pm.h>
#include <plat/omap_device.h>
#include <plat/common.h>
+#include <plat/voltage.h>
#include "powerdomain.h"
#include "clockdomain.h"
+#include "pm.h"
static struct omap_device_pm_latency *pm_lats;
@@ -154,6 +157,86 @@ err:
return ret;
}
+/*
+ * This API is to be called during init to put the various voltage
+ * domains to the voltage as per the opp table. Typically we boot up
+ * at the nominal voltage. So this function finds out the rate of
+ * the clock associated with the voltage domain, finds out the correct
+ * opp entry and puts the voltage domain to the voltage specifies
+ * in the opp entry
+ */
+static int __init omap2_set_init_voltage(char *vdd_name, char *clk_name,
+ struct device *dev)
+{
+ struct voltagedomain *voltdm;
+ struct clk *clk;
+ struct opp *opp;
+ unsigned long freq, bootup_volt;
+
+ if (!vdd_name || !clk_name || !dev) {
+ printk(KERN_ERR "%s: Invalid parameters!\n", __func__);
+ goto exit;
+ }
+
+ voltdm = omap_voltage_domain_lookup(vdd_name);
+ if (IS_ERR(voltdm)) {
+ printk(KERN_ERR "%s: Unable to get vdd pointer for vdd_%s\n",
+ __func__, vdd_name);
+ goto exit;
+ }
+
+ clk = clk_get(NULL, clk_name);
+ if (IS_ERR(clk)) {
+ printk(KERN_ERR "%s: unable to get clk %s\n",
+ __func__, clk_name);
+ goto exit;
+ }
+
+ freq = clk->rate;
+ clk_put(clk);
+
+ opp = opp_find_freq_ceil(dev, &freq);
+ if (IS_ERR(opp)) {
+ printk(KERN_ERR "%s: unable to find boot up OPP for vdd_%s\n",
+ __func__, vdd_name);
+ goto exit;
+ }
+
+ bootup_volt = opp_get_voltage(opp);
+ if (!bootup_volt) {
+ printk(KERN_ERR "%s: unable to find voltage corresponding"
+ "to the bootup OPP for vdd_%s\n", __func__, vdd_name);
+ goto exit;
+ }
+
+ omap_voltage_scale_vdd(voltdm, bootup_volt);
+ return 0;
+
+exit:
+ printk(KERN_ERR "%s: Unable to put vdd_%s to its init voltage\n\n",
+ __func__, vdd_name);
+ return -EINVAL;
+}
+
+static void __init omap3_init_voltages(void)
+{
+ if (!cpu_is_omap34xx())
+ return;
+
+ omap2_set_init_voltage("mpu", "dpll1_ck", mpu_dev);
+ omap2_set_init_voltage("core", "l3_ick", l3_dev);
+}
+
+static void __init omap4_init_voltages(void)
+{
+ if (!cpu_is_omap44xx())
+ return;
+
+ omap2_set_init_voltage("mpu", "dpll_mpu_ck", mpu_dev);
+ omap2_set_init_voltage("core", "l3_div_ck", l3_dev);
+ omap2_set_init_voltage("iva", "dpll_iva_m5x2_ck", iva_dev);
+}
+
static int __init omap2_common_pm_init(void)
{
omap2_init_processor_devices();
@@ -163,3 +246,22 @@ static int __init omap2_common_pm_init(void)
}
postcore_initcall(omap2_common_pm_init);
+static int __init omap2_common_pm_late_init(void)
+{
+ /* Init the OMAP TWL parameters */
+ omap3_twl_init();
+ omap4_twl_init();
+
+ /* Init the voltage layer */
+ omap_voltage_late_init();
+
+ /* Initialize the voltages */
+ omap3_init_voltages();
+ omap4_init_voltages();
+
+ /* Smartreflex device init */
+ omap_devinit_smartreflex();
+
+ return 0;
+}
+late_initcall(omap2_common_pm_late_init);
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index 482df7fc1585..1c1b0ab5b978 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -11,6 +11,8 @@
#ifndef __ARCH_ARM_MACH_OMAP2_PM_H
#define __ARCH_ARM_MACH_OMAP2_PM_H
+#include <linux/err.h>
+
#include "powerdomain.h"
extern void *omap3_secure_ram_storage;
@@ -110,4 +112,30 @@ extern void enable_omap3630_toggle_l2_on_restore(void);
static inline void enable_omap3630_toggle_l2_on_restore(void) { }
#endif /* defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3) */
+#ifdef CONFIG_OMAP_SMARTREFLEX
+extern int omap_devinit_smartreflex(void);
+extern void omap_enable_smartreflex_on_init(void);
+#else
+static inline int omap_devinit_smartreflex(void)
+{
+ return -EINVAL;
+}
+
+static inline void omap_enable_smartreflex_on_init(void) {}
+#endif
+
+#ifdef CONFIG_TWL4030_CORE
+extern int omap3_twl_init(void);
+extern int omap4_twl_init(void);
+#else
+static inline int omap3_twl_init(void)
+{
+ return -EINVAL;
+}
+static inline int omap4_twl_init(void)
+{
+ return -EINVAL;
+}
+#endif
+
#endif
diff --git a/arch/arm/mach-omap2/smartreflex-class3.c b/arch/arm/mach-omap2/smartreflex-class3.c
new file mode 100644
index 000000000000..60e70552b4c5
--- /dev/null
+++ b/arch/arm/mach-omap2/smartreflex-class3.c
@@ -0,0 +1,59 @@
+/*
+ * Smart reflex Class 3 specific implementations
+ *
+ * Author: Thara Gopinath <thara@ti.com>
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Thara Gopinath <thara@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <plat/smartreflex.h>
+
+static int sr_class3_enable(struct voltagedomain *voltdm)
+{
+ unsigned long volt = omap_voltage_get_nom_volt(voltdm);
+
+ if (!volt) {
+ pr_warning("%s: Curr voltage unknown. Cannot enable sr_%s\n",
+ __func__, voltdm->name);
+ return -ENODATA;
+ }
+
+ omap_vp_enable(voltdm);
+ return sr_enable(voltdm, volt);
+}
+
+static int sr_class3_disable(struct voltagedomain *voltdm, int is_volt_reset)
+{
+ omap_vp_disable(voltdm);
+ sr_disable(voltdm);
+ if (is_volt_reset)
+ omap_voltage_reset(voltdm);
+
+ return 0;
+}
+
+static int sr_class3_configure(struct voltagedomain *voltdm)
+{
+ return sr_configure_errgen(voltdm);
+}
+
+/* SR class3 structure */
+static struct omap_sr_class_data class3_data = {
+ .enable = sr_class3_enable,
+ .disable = sr_class3_disable,
+ .configure = sr_class3_configure,
+ .class_type = SR_CLASS3,
+};
+
+/* Smartreflex Class3 init API to be called from board file */
+static int __init sr_class3_init(void)
+{
+ pr_info("SmartReflex Class3 initialized\n");
+ return sr_register_class(&class3_data);
+}
+late_initcall(sr_class3_init);
diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
new file mode 100644
index 000000000000..77ecebf3fae2
--- /dev/null
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -0,0 +1,1029 @@
+/*
+ * OMAP SmartReflex Voltage Control
+ *
+ * Author: Thara Gopinath <thara@ti.com>
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Thara Gopinath <thara@ti.com>
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ * Kalle Jokiniemi
+ *
+ * Copyright (C) 2007 Texas Instruments, Inc.
+ * Lesly A M <x0080970@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+
+#include <plat/common.h>
+#include <plat/smartreflex.h>
+
+#include "pm.h"
+
+#define SMARTREFLEX_NAME_LEN 16
+#define NVALUE_NAME_LEN 40
+#define SR_DISABLE_TIMEOUT 200
+
+struct omap_sr {
+ int srid;
+ int ip_type;
+ int nvalue_count;
+ bool autocomp_active;
+ u32 clk_length;
+ u32 err_weight;
+ u32 err_minlimit;
+ u32 err_maxlimit;
+ u32 accum_data;
+ u32 senn_avgweight;
+ u32 senp_avgweight;
+ u32 senp_mod;
+ u32 senn_mod;
+ unsigned int irq;
+ void __iomem *base;
+ struct platform_device *pdev;
+ struct list_head node;
+ struct omap_sr_nvalue_table *nvalue_table;
+ struct voltagedomain *voltdm;
+};
+
+/* sr_list contains all the instances of smartreflex module */
+static LIST_HEAD(sr_list);
+
+static struct omap_sr_class_data *sr_class;
+static struct omap_sr_pmic_data *sr_pmic_data;
+
+static inline void sr_write_reg(struct omap_sr *sr, unsigned offset, u32 value)
+{
+ __raw_writel(value, (sr->base + offset));
+}
+
+static inline void sr_modify_reg(struct omap_sr *sr, unsigned offset, u32 mask,
+ u32 value)
+{
+ u32 reg_val;
+ u32 errconfig_offs = 0, errconfig_mask = 0;
+
+ reg_val = __raw_readl(sr->base + offset);
+ reg_val &= ~mask;
+
+ /*
+ * Smartreflex error config register is special as it contains
+ * certain status bits which if written a 1 into means a clear
+ * of those bits. So in order to make sure no accidental write of
+ * 1 happens to those status bits, do a clear of them in the read
+ * value. This mean this API doesn't rewrite values in these bits
+ * if they are currently set, but does allow the caller to write
+ * those bits.
+ */
+ if (sr->ip_type == SR_TYPE_V1) {
+ errconfig_offs = ERRCONFIG_V1;
+ errconfig_mask = ERRCONFIG_STATUS_V1_MASK;
+ } else if (sr->ip_type == SR_TYPE_V2) {
+ errconfig_offs = ERRCONFIG_V2;
+ errconfig_mask = ERRCONFIG_VPBOUNDINTST_V2;
+ }
+
+ if (offset == errconfig_offs)
+ reg_val &= ~errconfig_mask;
+
+ reg_val |= value;
+
+ __raw_writel(reg_val, (sr->base + offset));
+}
+
+static inline u32 sr_read_reg(struct omap_sr *sr, unsigned offset)
+{
+ return __raw_readl(sr->base + offset);
+}
+
+static struct omap_sr *_sr_lookup(struct voltagedomain *voltdm)
+{
+ struct omap_sr *sr_info;
+
+ if (!voltdm) {
+ pr_err("%s: Null voltage domain passed!\n", __func__);
+ return ERR_PTR(-EINVAL);
+ }
+
+ list_for_each_entry(sr_info, &sr_list, node) {
+ if (voltdm == sr_info->voltdm)
+ return sr_info;
+ }
+
+ return ERR_PTR(-ENODATA);
+}
+
+static irqreturn_t sr_interrupt(int irq, void *data)
+{
+ struct omap_sr *sr_info = (struct omap_sr *)data;
+ u32 status = 0;
+
+ if (sr_info->ip_type == SR_TYPE_V1) {
+ /* Read the status bits */
+ status = sr_read_reg(sr_info, ERRCONFIG_V1);
+
+ /* Clear them by writing back */
+ sr_write_reg(sr_info, ERRCONFIG_V1, status);
+ } else if (sr_info->ip_type == SR_TYPE_V2) {
+ /* Read the status bits */
+ sr_read_reg(sr_info, IRQSTATUS);
+
+ /* Clear them by writing back */
+ sr_write_reg(sr_info, IRQSTATUS, status);
+ }
+
+ if (sr_class->class_type == SR_CLASS2 && sr_class->notify)
+ sr_class->notify(sr_info->voltdm, status);
+
+ return IRQ_HANDLED;
+}
+
+static void sr_set_clk_length(struct omap_sr *sr)
+{
+ struct clk *sys_ck;
+ u32 sys_clk_speed;
+
+ if (cpu_is_omap34xx())
+ sys_ck = clk_get(NULL, "sys_ck");
+ else
+ sys_ck = clk_get(NULL, "sys_clkin_ck");
+
+ if (IS_ERR(sys_ck)) {
+ dev_err(&sr->pdev->dev, "%s: unable to get sys clk\n",
+ __func__);
+ return;
+ }
+ sys_clk_speed = clk_get_rate(sys_ck);
+ clk_put(sys_ck);
+
+ switch (sys_clk_speed) {
+ case 12000000:
+ sr->clk_length = SRCLKLENGTH_12MHZ_SYSCLK;
+ break;
+ case 13000000:
+ sr->clk_length = SRCLKLENGTH_13MHZ_SYSCLK;
+ break;
+ case 19200000:
+ sr->clk_length = SRCLKLENGTH_19MHZ_SYSCLK;
+ break;
+ case 26000000:
+ sr->clk_length = SRCLKLENGTH_26MHZ_SYSCLK;
+ break;
+ case 38400000:
+ sr->clk_length = SRCLKLENGTH_38MHZ_SYSCLK;
+ break;
+ default:
+ dev_err(&sr->pdev->dev, "%s: Invalid sysclk value: %d\n",
+ __func__, sys_clk_speed);
+ break;
+ }
+}
+
+static void sr_set_regfields(struct omap_sr *sr)
+{
+ /*
+ * For time being these values are defined in smartreflex.h
+ * and populated during init. May be they can be moved to board
+ * file or pmic specific data structure. In that case these structure
+ * fields will have to be populated using the pdata or pmic structure.
+ */
+ if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
+ sr->err_weight = OMAP3430_SR_ERRWEIGHT;
+ sr->err_maxlimit = OMAP3430_SR_ERRMAXLIMIT;
+ sr->accum_data = OMAP3430_SR_ACCUMDATA;
+ if (!(strcmp(sr->voltdm->name, "mpu"))) {
+ sr->senn_avgweight = OMAP3430_SR1_SENNAVGWEIGHT;
+ sr->senp_avgweight = OMAP3430_SR1_SENPAVGWEIGHT;
+ } else {
+ sr->senn_avgweight = OMAP3430_SR2_SENNAVGWEIGHT;
+ sr->senp_avgweight = OMAP3430_SR2_SENPAVGWEIGHT;
+ }
+ }
+}
+
+static void sr_start_vddautocomp(struct omap_sr *sr)
+{
+ if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) {
+ dev_warn(&sr->pdev->dev,
+ "%s: smartreflex class driver not registered\n",
+ __func__);
+ return;
+ }
+
+ if (!sr_class->enable(sr->voltdm))
+ sr->autocomp_active = true;
+}
+
+static void sr_stop_vddautocomp(struct omap_sr *sr)
+{
+ if (!sr_class || !(sr_class->disable)) {
+ dev_warn(&sr->pdev->dev,
+ "%s: smartreflex class driver not registered\n",
+ __func__);
+ return;
+ }
+
+ if (sr->autocomp_active) {
+ sr_class->disable(sr->voltdm, 1);
+ sr->autocomp_active = false;
+ }
+}
+
+/*
+ * This function handles the intializations which have to be done
+ * only when both sr device and class driver regiter has
+ * completed. This will be attempted to be called from both sr class
+ * driver register and sr device intializtion API's. Only one call
+ * will ultimately succeed.
+ *
+ * Currenly this function registers interrrupt handler for a particular SR
+ * if smartreflex class driver is already registered and has
+ * requested for interrupts and the SR interrupt line in present.
+ */
+static int sr_late_init(struct omap_sr *sr_info)
+{
+ char *name;
+ struct omap_sr_data *pdata = sr_info->pdev->dev.platform_data;
+ struct resource *mem;
+ int ret = 0;
+
+ if (sr_class->class_type == SR_CLASS2 &&
+ sr_class->notify_flags && sr_info->irq) {
+
+ name = kzalloc(SMARTREFLEX_NAME_LEN + 1, GFP_KERNEL);
+ strcpy(name, "sr_");
+ strcat(name, sr_info->voltdm->name);
+ ret = request_irq(sr_info->irq, sr_interrupt,
+ 0, name, (void *)sr_info);
+ if (ret)
+ goto error;
+ }
+
+ if (pdata && pdata->enable_on_init)
+ sr_start_vddautocomp(sr_info);
+
+ return ret;
+
+error:
+ iounmap(sr_info->base);
+ mem = platform_get_resource(sr_info->pdev, IORESOURCE_MEM, 0);
+ release_mem_region(mem->start, resource_size(mem));
+ list_del(&sr_info->node);
+ dev_err(&sr_info->pdev->dev, "%s: ERROR in registering"
+ "interrupt handler. Smartreflex will"
+ "not function as desired\n", __func__);
+ kfree(sr_info);
+ return ret;
+}
+
+static void sr_v1_disable(struct omap_sr *sr)
+{
+ int timeout = 0;
+
+ /* Enable MCUDisableAcknowledge interrupt */
+ sr_modify_reg(sr, ERRCONFIG_V1,
+ ERRCONFIG_MCUDISACKINTEN, ERRCONFIG_MCUDISACKINTEN);
+
+ /* SRCONFIG - disable SR */
+ sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0);
+
+ /* Disable all other SR interrupts and clear the status */
+ sr_modify_reg(sr, ERRCONFIG_V1,
+ (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN |
+ ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_VPBOUNDINTEN_V1),
+ (ERRCONFIG_MCUACCUMINTST | ERRCONFIG_MCUVALIDINTST |
+ ERRCONFIG_MCUBOUNDINTST |
+ ERRCONFIG_VPBOUNDINTST_V1));
+
+ /*
+ * Wait for SR to be disabled.
+ * wait until ERRCONFIG.MCUDISACKINTST = 1. Typical latency is 1us.
+ */
+ omap_test_timeout((sr_read_reg(sr, ERRCONFIG_V1) &
+ ERRCONFIG_MCUDISACKINTST), SR_DISABLE_TIMEOUT,
+ timeout);
+
+ if (timeout >= SR_DISABLE_TIMEOUT)
+ dev_warn(&sr->pdev->dev, "%s: Smartreflex disable timedout\n",
+ __func__);
+
+ /* Disable MCUDisableAcknowledge interrupt & clear pending interrupt */
+ sr_modify_reg(sr, ERRCONFIG_V1, ERRCONFIG_MCUDISACKINTEN,
+ ERRCONFIG_MCUDISACKINTST);
+}
+
+static void sr_v2_disable(struct omap_sr *sr)
+{
+ int timeout = 0;
+
+ /* Enable MCUDisableAcknowledge interrupt */
+ sr_write_reg(sr, IRQENABLE_SET, IRQENABLE_MCUDISABLEACKINT);
+
+ /* SRCONFIG - disable SR */
+ sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0);
+
+ /* Disable all other SR interrupts and clear the status */
+ sr_modify_reg(sr, ERRCONFIG_V2, ERRCONFIG_VPBOUNDINTEN_V2,
+ ERRCONFIG_VPBOUNDINTST_V2);
+ sr_write_reg(sr, IRQENABLE_CLR, (IRQENABLE_MCUACCUMINT |
+ IRQENABLE_MCUVALIDINT |
+ IRQENABLE_MCUBOUNDSINT));
+ sr_write_reg(sr, IRQSTATUS, (IRQSTATUS_MCUACCUMINT |
+ IRQSTATUS_MCVALIDINT |
+ IRQSTATUS_MCBOUNDSINT));
+
+ /*
+ * Wait for SR to be disabled.
+ * wait until IRQSTATUS.MCUDISACKINTST = 1. Typical latency is 1us.
+ */
+ omap_test_timeout((sr_read_reg(sr, IRQSTATUS) &
+ IRQSTATUS_MCUDISABLEACKINT), SR_DISABLE_TIMEOUT,
+ timeout);
+
+ if (timeout >= SR_DISABLE_TIMEOUT)
+ dev_warn(&sr->pdev->dev, "%s: Smartreflex disable timedout\n",
+ __func__);
+
+ /* Disable MCUDisableAcknowledge interrupt & clear pending interrupt */
+ sr_write_reg(sr, IRQENABLE_CLR, IRQENABLE_MCUDISABLEACKINT);
+ sr_write_reg(sr, IRQSTATUS, IRQSTATUS_MCUDISABLEACKINT);
+}
+
+static u32 sr_retrieve_nvalue(struct omap_sr *sr, u32 efuse_offs)
+{
+ int i;
+
+ if (!sr->nvalue_table) {
+ dev_warn(&sr->pdev->dev, "%s: Missing ntarget value table\n",
+ __func__);
+ return 0;
+ }
+
+ for (i = 0; i < sr->nvalue_count; i++) {
+ if (sr->nvalue_table[i].efuse_offs == efuse_offs)
+ return sr->nvalue_table[i].nvalue;
+ }
+
+ return 0;
+}
+
+/* Public Functions */
+
+/**
+ * sr_configure_errgen() - Configures the smrtreflex to perform AVS using the
+ * error generator module.
+ * @voltdm: VDD pointer to which the SR module to be configured belongs to.
+ *
+ * This API is to be called from the smartreflex class driver to
+ * configure the error generator module inside the smartreflex module.
+ * SR settings if using the ERROR module inside Smartreflex.
+ * SR CLASS 3 by default uses only the ERROR module where as
+ * SR CLASS 2 can choose between ERROR module and MINMAXAVG
+ * module. Returns 0 on success and error value in case of failure.
+ */
+int sr_configure_errgen(struct voltagedomain *voltdm)
+{
+ u32 sr_config, sr_errconfig, errconfig_offs, vpboundint_en;
+ u32 vpboundint_st, senp_en = 0, senn_en = 0;
+ u8 senp_shift, senn_shift;
+ struct omap_sr *sr = _sr_lookup(voltdm);
+
+ if (IS_ERR(sr)) {
+ pr_warning("%s: omap_sr struct for sr_%s not found\n",
+ __func__, voltdm->name);
+ return -EINVAL;
+ }
+
+ if (!sr->clk_length)
+ sr_set_clk_length(sr);
+
+ senp_en = sr->senp_mod;
+ senn_en = sr->senn_mod;
+
+ sr_config = (sr->clk_length << SRCONFIG_SRCLKLENGTH_SHIFT) |
+ SRCONFIG_SENENABLE | SRCONFIG_ERRGEN_EN;
+
+ if (sr->ip_type == SR_TYPE_V1) {
+ sr_config |= SRCONFIG_DELAYCTRL;
+ senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT;
+ senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT;
+ errconfig_offs = ERRCONFIG_V1;
+ vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V1;
+ vpboundint_st = ERRCONFIG_VPBOUNDINTST_V1;
+ } else if (sr->ip_type == SR_TYPE_V2) {
+ senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT;
+ senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT;
+ errconfig_offs = ERRCONFIG_V2;
+ vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V2;
+ vpboundint_st = ERRCONFIG_VPBOUNDINTST_V2;
+ } else {
+ dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex"
+ "module without specifying the ip\n", __func__);
+ return -EINVAL;
+ }
+
+ sr_config |= ((senn_en << senn_shift) | (senp_en << senp_shift));
+ sr_write_reg(sr, SRCONFIG, sr_config);
+ sr_errconfig = (sr->err_weight << ERRCONFIG_ERRWEIGHT_SHIFT) |
+ (sr->err_maxlimit << ERRCONFIG_ERRMAXLIMIT_SHIFT) |
+ (sr->err_minlimit << ERRCONFIG_ERRMINLIMIT_SHIFT);
+ sr_modify_reg(sr, errconfig_offs, (SR_ERRWEIGHT_MASK |
+ SR_ERRMAXLIMIT_MASK | SR_ERRMINLIMIT_MASK),
+ sr_errconfig);
+
+ /* Enabling the interrupts if the ERROR module is used */
+ sr_modify_reg(sr, errconfig_offs,
+ vpboundint_en, (vpboundint_en | vpboundint_st));
+
+ return 0;
+}
+
+/**
+ * sr_configure_minmax() - Configures the smrtreflex to perform AVS using the
+ * minmaxavg module.
+ * @voltdm: VDD pointer to which the SR module to be configured belongs to.
+ *
+ * This API is to be called from the smartreflex class driver to
+ * configure the minmaxavg module inside the smartreflex module.
+ * SR settings if using the ERROR module inside Smartreflex.
+ * SR CLASS 3 by default uses only the ERROR module where as
+ * SR CLASS 2 can choose between ERROR module and MINMAXAVG
+ * module. Returns 0 on success and error value in case of failure.
+ */
+int sr_configure_minmax(struct voltagedomain *voltdm)
+{
+ u32 sr_config, sr_avgwt;
+ u32 senp_en = 0, senn_en = 0;
+ u8 senp_shift, senn_shift;
+ struct omap_sr *sr = _sr_lookup(voltdm);
+
+ if (IS_ERR(sr)) {
+ pr_warning("%s: omap_sr struct for sr_%s not found\n",
+ __func__, voltdm->name);
+ return -EINVAL;
+ }
+
+ if (!sr->clk_length)
+ sr_set_clk_length(sr);
+
+ senp_en = sr->senp_mod;
+ senn_en = sr->senn_mod;
+
+ sr_config = (sr->clk_length << SRCONFIG_SRCLKLENGTH_SHIFT) |
+ SRCONFIG_SENENABLE |
+ (sr->accum_data << SRCONFIG_ACCUMDATA_SHIFT);
+
+ if (sr->ip_type == SR_TYPE_V1) {
+ sr_config |= SRCONFIG_DELAYCTRL;
+ senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT;
+ senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT;
+ } else if (sr->ip_type == SR_TYPE_V2) {
+ senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT;
+ senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT;
+ } else {
+ dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex"
+ "module without specifying the ip\n", __func__);
+ return -EINVAL;
+ }
+
+ sr_config |= ((senn_en << senn_shift) | (senp_en << senp_shift));
+ sr_write_reg(sr, SRCONFIG, sr_config);
+ sr_avgwt = (sr->senp_avgweight << AVGWEIGHT_SENPAVGWEIGHT_SHIFT) |
+ (sr->senn_avgweight << AVGWEIGHT_SENNAVGWEIGHT_SHIFT);
+ sr_write_reg(sr, AVGWEIGHT, sr_avgwt);
+
+ /*
+ * Enabling the interrupts if MINMAXAVG module is used.
+ * TODO: check if all the interrupts are mandatory
+ */
+ if (sr->ip_type == SR_TYPE_V1) {
+ sr_modify_reg(sr, ERRCONFIG_V1,
+ (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN |
+ ERRCONFIG_MCUBOUNDINTEN),
+ (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUACCUMINTST |
+ ERRCONFIG_MCUVALIDINTEN | ERRCONFIG_MCUVALIDINTST |
+ ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_MCUBOUNDINTST));
+ } else if (sr->ip_type == SR_TYPE_V2) {
+ sr_write_reg(sr, IRQSTATUS,
+ IRQSTATUS_MCUACCUMINT | IRQSTATUS_MCVALIDINT |
+ IRQSTATUS_MCBOUNDSINT | IRQSTATUS_MCUDISABLEACKINT);
+ sr_write_reg(sr, IRQENABLE_SET,
+ IRQENABLE_MCUACCUMINT | IRQENABLE_MCUVALIDINT |
+ IRQENABLE_MCUBOUNDSINT | IRQENABLE_MCUDISABLEACKINT);
+ }
+
+ return 0;
+}
+
+/**
+ * sr_enable() - Enables the smartreflex module.
+ * @voltdm: VDD pointer to which the SR module to be configured belongs to.
+ * @volt: The voltage at which the Voltage domain associated with
+ * the smartreflex module is operating at.
+ * This is required only to program the correct Ntarget value.
+ *
+ * This API is to be called from the smartreflex class driver to
+ * enable a smartreflex module. Returns 0 on success. Returns error
+ * value if the voltage passed is wrong or if ntarget value is wrong.
+ */
+int sr_enable(struct voltagedomain *voltdm, unsigned long volt)
+{
+ u32 nvalue_reciprocal;
+ struct omap_volt_data *volt_data;
+ struct omap_sr *sr = _sr_lookup(voltdm);
+ int ret;
+
+ if (IS_ERR(sr)) {
+ pr_warning("%s: omap_sr struct for sr_%s not found\n",
+ __func__, voltdm->name);
+ return -EINVAL;
+ }
+
+ volt_data = omap_voltage_get_voltdata(sr->voltdm, volt);
+
+ if (IS_ERR(volt_data)) {
+ dev_warn(&sr->pdev->dev, "%s: Unable to get voltage table"
+ "for nominal voltage %ld\n", __func__, volt);
+ return -ENODATA;
+ }
+
+ nvalue_reciprocal = sr_retrieve_nvalue(sr, volt_data->sr_efuse_offs);
+
+ if (!nvalue_reciprocal) {
+ dev_warn(&sr->pdev->dev, "%s: NVALUE = 0 at voltage %ld\n",
+ __func__, volt);
+ return -ENODATA;
+ }
+
+ /* errminlimit is opp dependent and hence linked to voltage */
+ sr->err_minlimit = volt_data->sr_errminlimit;
+
+ pm_runtime_get_sync(&sr->pdev->dev);
+
+ /* Check if SR is already enabled. If yes do nothing */
+ if (sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE)
+ return 0;
+
+ /* Configure SR */
+ ret = sr_class->configure(voltdm);
+ if (ret)
+ return ret;
+
+ sr_write_reg(sr, NVALUERECIPROCAL, nvalue_reciprocal);
+
+ /* SRCONFIG - enable SR */
+ sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, SRCONFIG_SRENABLE);
+ return 0;
+}
+
+/**
+ * sr_disable() - Disables the smartreflex module.
+ * @voltdm: VDD pointer to which the SR module to be configured belongs to.
+ *
+ * This API is to be called from the smartreflex class driver to
+ * disable a smartreflex module.
+ */
+void sr_disable(struct voltagedomain *voltdm)
+{
+ struct omap_sr *sr = _sr_lookup(voltdm);
+
+ if (IS_ERR(sr)) {
+ pr_warning("%s: omap_sr struct for sr_%s not found\n",
+ __func__, voltdm->name);
+ return;
+ }
+
+ /* Check if SR clocks are already disabled. If yes do nothing */
+ if (pm_runtime_suspended(&sr->pdev->dev))
+ return;
+
+ /*
+ * Disable SR if only it is indeed enabled. Else just
+ * disable the clocks.
+ */
+ if (sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE) {
+ if (sr->ip_type == SR_TYPE_V1)
+ sr_v1_disable(sr);
+ else if (sr->ip_type == SR_TYPE_V2)
+ sr_v2_disable(sr);
+ }
+
+ pm_runtime_put_sync(&sr->pdev->dev);
+}
+
+/**
+ * sr_register_class() - API to register a smartreflex class parameters.
+ * @class_data: The structure containing various sr class specific data.
+ *
+ * This API is to be called by the smartreflex class driver to register itself
+ * with the smartreflex driver during init. Returns 0 on success else the
+ * error value.
+ */
+int sr_register_class(struct omap_sr_class_data *class_data)
+{
+ struct omap_sr *sr_info;
+
+ if (!class_data) {
+ pr_warning("%s:, Smartreflex class data passed is NULL\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ if (sr_class) {
+ pr_warning("%s: Smartreflex class driver already registered\n",
+ __func__);
+ return -EBUSY;
+ }
+
+ sr_class = class_data;
+
+ /*
+ * Call into late init to do intializations that require
+ * both sr driver and sr class driver to be initiallized.
+ */
+ list_for_each_entry(sr_info, &sr_list, node)
+ sr_late_init(sr_info);
+
+ return 0;
+}
+
+/**
+ * omap_sr_enable() - API to enable SR clocks and to call into the
+ * registered smartreflex class enable API.
+ * @voltdm: VDD pointer to which the SR module to be configured belongs to.
+ *
+ * This API is to be called from the kernel in order to enable
+ * a particular smartreflex module. This API will do the initial
+ * configurations to turn on the smartreflex module and in turn call
+ * into the registered smartreflex class enable API.
+ */
+void omap_sr_enable(struct voltagedomain *voltdm)
+{
+ struct omap_sr *sr = _sr_lookup(voltdm);
+
+ if (IS_ERR(sr)) {
+ pr_warning("%s: omap_sr struct for sr_%s not found\n",
+ __func__, voltdm->name);
+ return;
+ }
+
+ if (!sr->autocomp_active)
+ return;
+
+ if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) {
+ dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not"
+ "registered\n", __func__);
+ return;
+ }
+
+ sr_class->enable(voltdm);
+}
+
+/**
+ * omap_sr_disable() - API to disable SR without resetting the voltage
+ * processor voltage
+ * @voltdm: VDD pointer to which the SR module to be configured belongs to.
+ *
+ * This API is to be called from the kernel in order to disable
+ * a particular smartreflex module. This API will in turn call
+ * into the registered smartreflex class disable API. This API will tell
+ * the smartreflex class disable not to reset the VP voltage after
+ * disabling smartreflex.
+ */
+void omap_sr_disable(struct voltagedomain *voltdm)
+{
+ struct omap_sr *sr = _sr_lookup(voltdm);
+
+ if (IS_ERR(sr)) {
+ pr_warning("%s: omap_sr struct for sr_%s not found\n",
+ __func__, voltdm->name);
+ return;
+ }
+
+ if (!sr->autocomp_active)
+ return;
+
+ if (!sr_class || !(sr_class->disable)) {
+ dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not"
+ "registered\n", __func__);
+ return;
+ }
+
+ sr_class->disable(voltdm, 0);
+}
+
+/**
+ * omap_sr_disable_reset_volt() - API to disable SR and reset the
+ * voltage processor voltage
+ * @voltdm: VDD pointer to which the SR module to be configured belongs to.
+ *
+ * This API is to be called from the kernel in order to disable
+ * a particular smartreflex module. This API will in turn call
+ * into the registered smartreflex class disable API. This API will tell
+ * the smartreflex class disable to reset the VP voltage after
+ * disabling smartreflex.
+ */
+void omap_sr_disable_reset_volt(struct voltagedomain *voltdm)
+{
+ struct omap_sr *sr = _sr_lookup(voltdm);
+
+ if (IS_ERR(sr)) {
+ pr_warning("%s: omap_sr struct for sr_%s not found\n",
+ __func__, voltdm->name);
+ return;
+ }
+
+ if (!sr->autocomp_active)
+ return;
+
+ if (!sr_class || !(sr_class->disable)) {
+ dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not"
+ "registered\n", __func__);
+ return;
+ }
+
+ sr_class->disable(voltdm, 1);
+}
+
+/**
+ * omap_sr_register_pmic() - API to register pmic specific info.
+ * @pmic_data: The structure containing pmic specific data.
+ *
+ * This API is to be called from the PMIC specific code to register with
+ * smartreflex driver pmic specific info. Currently the only info required
+ * is the smartreflex init on the PMIC side.
+ */
+void omap_sr_register_pmic(struct omap_sr_pmic_data *pmic_data)
+{
+ if (!pmic_data) {
+ pr_warning("%s: Trying to register NULL PMIC data structure"
+ "with smartreflex\n", __func__);
+ return;
+ }
+
+ sr_pmic_data = pmic_data;
+}
+
+/* PM Debug Fs enteries to enable disable smartreflex. */
+static int omap_sr_autocomp_show(void *data, u64 *val)
+{
+ struct omap_sr *sr_info = (struct omap_sr *) data;
+
+ if (!sr_info) {
+ pr_warning("%s: omap_sr struct for sr_%s not found\n",
+ __func__, sr_info->voltdm->name);
+ return -EINVAL;
+ }
+
+ *val = sr_info->autocomp_active;
+
+ return 0;
+}
+
+static int omap_sr_autocomp_store(void *data, u64 val)
+{
+ struct omap_sr *sr_info = (struct omap_sr *) data;
+
+ if (!sr_info) {
+ pr_warning("%s: omap_sr struct for sr_%s not found\n",
+ __func__, sr_info->voltdm->name);
+ return -EINVAL;
+ }
+
+ /* Sanity check */
+ if (val && (val != 1)) {
+ pr_warning("%s: Invalid argument %lld\n", __func__, val);
+ return -EINVAL;
+ }
+
+ if (!val)
+ sr_stop_vddautocomp(sr_info);
+ else
+ sr_start_vddautocomp(sr_info);
+
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(pm_sr_fops, omap_sr_autocomp_show,
+ omap_sr_autocomp_store, "%llu\n");
+
+static int __init omap_sr_probe(struct platform_device *pdev)
+{
+ struct omap_sr *sr_info = kzalloc(sizeof(struct omap_sr), GFP_KERNEL);
+ struct omap_sr_data *pdata = pdev->dev.platform_data;
+ struct resource *mem, *irq;
+ struct dentry *vdd_dbg_dir, *dbg_dir, *nvalue_dir;
+ struct omap_volt_data *volt_data;
+ int i, ret = 0;
+
+ if (!sr_info) {
+ dev_err(&pdev->dev, "%s: unable to allocate sr_info\n",
+ __func__);
+ return -ENOMEM;
+ }
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "%s: platform data missing\n", __func__);
+ return -EINVAL;
+ }
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem) {
+ dev_err(&pdev->dev, "%s: no mem resource\n", __func__);
+ ret = -ENODEV;
+ goto err_free_devinfo;
+ }
+
+ irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+
+ pm_runtime_enable(&pdev->dev);
+
+ sr_info->pdev = pdev;
+ sr_info->srid = pdev->id;
+ sr_info->voltdm = pdata->voltdm;
+ sr_info->nvalue_table = pdata->nvalue_table;
+ sr_info->nvalue_count = pdata->nvalue_count;
+ sr_info->senn_mod = pdata->senn_mod;
+ sr_info->senp_mod = pdata->senp_mod;
+ sr_info->autocomp_active = false;
+ sr_info->ip_type = pdata->ip_type;
+ sr_info->base = ioremap(mem->start, resource_size(mem));
+ if (!sr_info->base) {
+ dev_err(&pdev->dev, "%s: ioremap fail\n", __func__);
+ ret = -ENOMEM;
+ goto err_release_region;
+ }
+
+ if (irq)
+ sr_info->irq = irq->start;
+
+ sr_set_clk_length(sr_info);
+ sr_set_regfields(sr_info);
+
+ list_add(&sr_info->node, &sr_list);
+
+ /*
+ * Call into late init to do intializations that require
+ * both sr driver and sr class driver to be initiallized.
+ */
+ if (sr_class) {
+ ret = sr_late_init(sr_info);
+ if (ret) {
+ pr_warning("%s: Error in SR late init\n", __func__);
+ return ret;
+ }
+ }
+
+ dev_info(&pdev->dev, "%s: SmartReflex driver initialized\n", __func__);
+
+ /*
+ * If the voltage domain debugfs directory is not created, do
+ * not try to create rest of the debugfs entries.
+ */
+ vdd_dbg_dir = omap_voltage_get_dbgdir(sr_info->voltdm);
+ if (!vdd_dbg_dir)
+ return -EINVAL;
+
+ dbg_dir = debugfs_create_dir("smartreflex", vdd_dbg_dir);
+ if (IS_ERR(dbg_dir)) {
+ dev_err(&pdev->dev, "%s: Unable to create debugfs directory\n",
+ __func__);
+ return PTR_ERR(dbg_dir);
+ }
+
+ (void) debugfs_create_file("autocomp", S_IRUGO | S_IWUGO, dbg_dir,
+ (void *)sr_info, &pm_sr_fops);
+ (void) debugfs_create_x32("errweight", S_IRUGO, dbg_dir,
+ &sr_info->err_weight);
+ (void) debugfs_create_x32("errmaxlimit", S_IRUGO, dbg_dir,
+ &sr_info->err_maxlimit);
+ (void) debugfs_create_x32("errminlimit", S_IRUGO, dbg_dir,
+ &sr_info->err_minlimit);
+
+ nvalue_dir = debugfs_create_dir("nvalue", dbg_dir);
+ if (IS_ERR(nvalue_dir)) {
+ dev_err(&pdev->dev, "%s: Unable to create debugfs directory"
+ "for n-values\n", __func__);
+ return PTR_ERR(nvalue_dir);
+ }
+
+ omap_voltage_get_volttable(sr_info->voltdm, &volt_data);
+ if (!volt_data) {
+ dev_warn(&pdev->dev, "%s: No Voltage table for the"
+ " corresponding vdd vdd_%s. Cannot create debugfs"
+ "entries for n-values\n",
+ __func__, sr_info->voltdm->name);
+ return -ENODATA;
+ }
+
+ for (i = 0; i < sr_info->nvalue_count; i++) {
+ char *name;
+ char volt_name[32];
+
+ name = kzalloc(NVALUE_NAME_LEN + 1, GFP_KERNEL);
+ if (!name) {
+ dev_err(&pdev->dev, "%s: Unable to allocate memory"
+ " for n-value directory name\n", __func__);
+ return -ENOMEM;
+ }
+
+ strcpy(name, "volt_");
+ sprintf(volt_name, "%d", volt_data[i].volt_nominal);
+ strcat(name, volt_name);
+ (void) debugfs_create_x32(name, S_IRUGO | S_IWUGO, nvalue_dir,
+ &(sr_info->nvalue_table[i].nvalue));
+ }
+
+ return ret;
+
+err_release_region:
+ release_mem_region(mem->start, resource_size(mem));
+err_free_devinfo:
+ kfree(sr_info);
+
+ return ret;
+}
+
+static int __devexit omap_sr_remove(struct platform_device *pdev)
+{
+ struct omap_sr_data *pdata = pdev->dev.platform_data;
+ struct omap_sr *sr_info;
+ struct resource *mem;
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "%s: platform data missing\n", __func__);
+ return -EINVAL;
+ }
+
+ sr_info = _sr_lookup(pdata->voltdm);
+ if (!sr_info) {
+ dev_warn(&pdev->dev, "%s: omap_sr struct not found\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ if (sr_info->autocomp_active)
+ sr_stop_vddautocomp(sr_info);
+
+ list_del(&sr_info->node);
+ iounmap(sr_info->base);
+ kfree(sr_info);
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(mem->start, resource_size(mem));
+
+ return 0;
+}
+
+static struct platform_driver smartreflex_driver = {
+ .remove = omap_sr_remove,
+ .driver = {
+ .name = "smartreflex",
+ },
+};
+
+static int __init sr_init(void)
+{
+ int ret = 0;
+
+ /*
+ * sr_init is a late init. If by then a pmic specific API is not
+ * registered either there is no need for anything to be done on
+ * the PMIC side or somebody has forgotten to register a PMIC
+ * handler. Warn for the second condition.
+ */
+ if (sr_pmic_data && sr_pmic_data->sr_pmic_init)
+ sr_pmic_data->sr_pmic_init();
+ else
+ pr_warning("%s: No PMIC hook to init smartreflex\n", __func__);
+
+ ret = platform_driver_probe(&smartreflex_driver, omap_sr_probe);
+ if (ret) {
+ pr_err("%s: platform driver register failed for SR\n",
+ __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void __exit sr_exit(void)
+{
+ platform_driver_unregister(&smartreflex_driver);
+}
+late_initcall(sr_init);
+module_exit(sr_exit);
+
+MODULE_DESCRIPTION("OMAP Smartreflex Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRIVER_NAME);
+MODULE_AUTHOR("Texas Instruments Inc");
diff --git a/arch/arm/mach-omap2/sr_device.c b/arch/arm/mach-omap2/sr_device.c
new file mode 100644
index 000000000000..786d685c09a9
--- /dev/null
+++ b/arch/arm/mach-omap2/sr_device.c
@@ -0,0 +1,146 @@
+/*
+ * OMAP3/OMAP4 smartreflex device file
+ *
+ * Author: Thara Gopinath <thara@ti.com>
+ *
+ * Based originally on code from smartreflex.c
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Thara Gopinath <thara@ti.com>
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ * Kalle Jokiniemi
+ *
+ * Copyright (C) 2007 Texas Instruments, Inc.
+ * Lesly A M <x0080970@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+
+#include <plat/omap_device.h>
+#include <plat/smartreflex.h>
+#include <plat/voltage.h>
+
+#include "control.h"
+
+static bool sr_enable_on_init;
+
+static struct omap_device_pm_latency omap_sr_latency[] = {
+ {
+ .deactivate_func = omap_device_idle_hwmods,
+ .activate_func = omap_device_enable_hwmods,
+ .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST
+ },
+};
+
+/* Read EFUSE values from control registers for OMAP3430 */
+static void __init sr_set_nvalues(struct omap_volt_data *volt_data,
+ struct omap_sr_data *sr_data)
+{
+ struct omap_sr_nvalue_table *nvalue_table;
+ int i, count = 0;
+
+ while (volt_data[count].volt_nominal)
+ count++;
+
+ nvalue_table = kzalloc(sizeof(struct omap_sr_nvalue_table)*count,
+ GFP_KERNEL);
+
+ for (i = 0; i < count; i++) {
+ u32 v;
+ /*
+ * In OMAP4 the efuse registers are 24 bit aligned.
+ * A __raw_readl will fail for non-32 bit aligned address
+ * and hence the 8-bit read and shift.
+ */
+ if (cpu_is_omap44xx()) {
+ u16 offset = volt_data[i].sr_efuse_offs;
+
+ v = omap_ctrl_readb(offset) |
+ omap_ctrl_readb(offset + 1) << 8 |
+ omap_ctrl_readb(offset + 2) << 16;
+ } else {
+ v = omap_ctrl_readl(volt_data[i].sr_efuse_offs);
+ }
+
+ nvalue_table[i].efuse_offs = volt_data[i].sr_efuse_offs;
+ nvalue_table[i].nvalue = v;
+ }
+
+ sr_data->nvalue_table = nvalue_table;
+ sr_data->nvalue_count = count;
+}
+
+static int sr_dev_init(struct omap_hwmod *oh, void *user)
+{
+ struct omap_sr_data *sr_data;
+ struct omap_device *od;
+ struct omap_volt_data *volt_data;
+ char *name = "smartreflex";
+ static int i;
+
+ sr_data = kzalloc(sizeof(struct omap_sr_data), GFP_KERNEL);
+ if (!sr_data) {
+ pr_err("%s: Unable to allocate memory for %s sr_data.Error!\n",
+ __func__, oh->name);
+ return -ENOMEM;
+ }
+
+ if (!oh->vdd_name) {
+ pr_err("%s: No voltage domain specified for %s."
+ "Cannot initialize\n", __func__, oh->name);
+ goto exit;
+ }
+
+ sr_data->ip_type = oh->class->rev;
+ sr_data->senn_mod = 0x1;
+ sr_data->senp_mod = 0x1;
+
+ sr_data->voltdm = omap_voltage_domain_lookup(oh->vdd_name);
+ if (IS_ERR(sr_data->voltdm)) {
+ pr_err("%s: Unable to get voltage domain pointer for VDD %s\n",
+ __func__, oh->vdd_name);
+ goto exit;
+ }
+
+ omap_voltage_get_volttable(sr_data->voltdm, &volt_data);
+ if (!volt_data) {
+ pr_warning("%s: No Voltage table registerd fo VDD%d."
+ "Something really wrong\n\n", __func__, i + 1);
+ goto exit;
+ }
+
+ sr_set_nvalues(volt_data, sr_data);
+
+ sr_data->enable_on_init = sr_enable_on_init;
+
+ od = omap_device_build(name, i, oh, sr_data, sizeof(*sr_data),
+ omap_sr_latency,
+ ARRAY_SIZE(omap_sr_latency), 0);
+ if (IS_ERR(od))
+ pr_warning("%s: Could not build omap_device for %s: %s.\n\n",
+ __func__, name, oh->name);
+exit:
+ i++;
+ kfree(sr_data);
+ return 0;
+}
+
+/*
+ * API to be called from board files to enable smartreflex
+ * autocompensation at init.
+ */
+void __init omap_enable_smartreflex_on_init(void)
+{
+ sr_enable_on_init = true;
+}
+
+int __init omap_devinit_smartreflex(void)
+{
+ return omap_hwmod_for_each_by_class("smartreflex", sr_dev_init, NULL);
+}
diff --git a/arch/arm/mach-omap2/voltage.c b/arch/arm/mach-omap2/voltage.c
new file mode 100644
index 000000000000..ed6079c94c57
--- /dev/null
+++ b/arch/arm/mach-omap2/voltage.c
@@ -0,0 +1,1571 @@
+/*
+ * OMAP3/OMAP4 Voltage Management Routines
+ *
+ * Author: Thara Gopinath <thara@ti.com>
+ *
+ * Copyright (C) 2007 Texas Instruments, Inc.
+ * Rajendra Nayak <rnayak@ti.com>
+ * Lesly A M <x0080970@ti.com>
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ * Kalle Jokiniemi
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Thara Gopinath <thara@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/debugfs.h>
+#include <linux/slab.h>
+
+#include <plat/common.h>
+#include <plat/voltage.h>
+
+#include "prm-regbits-34xx.h"
+#include "prm-regbits-44xx.h"
+#include "prm44xx.h"
+#include "prcm44xx.h"
+#include "prminst44xx.h"
+#include "control.h"
+
+#define VP_IDLE_TIMEOUT 200
+#define VP_TRANXDONE_TIMEOUT 300
+#define VOLTAGE_DIR_SIZE 16
+
+/* Voltage processor register offsets */
+struct vp_reg_offs {
+ u8 vpconfig;
+ u8 vstepmin;
+ u8 vstepmax;
+ u8 vlimitto;
+ u8 vstatus;
+ u8 voltage;
+};
+
+/* Voltage Processor bit field values, shifts and masks */
+struct vp_reg_val {
+ /* PRM module */
+ u16 prm_mod;
+ /* VPx_VPCONFIG */
+ u32 vpconfig_erroroffset;
+ u16 vpconfig_errorgain;
+ u32 vpconfig_errorgain_mask;
+ u8 vpconfig_errorgain_shift;
+ u32 vpconfig_initvoltage_mask;
+ u8 vpconfig_initvoltage_shift;
+ u32 vpconfig_timeouten;
+ u32 vpconfig_initvdd;
+ u32 vpconfig_forceupdate;
+ u32 vpconfig_vpenable;
+ /* VPx_VSTEPMIN */
+ u8 vstepmin_stepmin;
+ u16 vstepmin_smpswaittimemin;
+ u8 vstepmin_stepmin_shift;
+ u8 vstepmin_smpswaittimemin_shift;
+ /* VPx_VSTEPMAX */
+ u8 vstepmax_stepmax;
+ u16 vstepmax_smpswaittimemax;
+ u8 vstepmax_stepmax_shift;
+ u8 vstepmax_smpswaittimemax_shift;
+ /* VPx_VLIMITTO */
+ u8 vlimitto_vddmin;
+ u8 vlimitto_vddmax;
+ u16 vlimitto_timeout;
+ u8 vlimitto_vddmin_shift;
+ u8 vlimitto_vddmax_shift;
+ u8 vlimitto_timeout_shift;
+ /* PRM_IRQSTATUS*/
+ u32 tranxdone_status;
+};
+
+/* Voltage controller registers and offsets */
+struct vc_reg_info {
+ /* PRM module */
+ u16 prm_mod;
+ /* VC register offsets */
+ u8 smps_sa_reg;
+ u8 smps_volra_reg;
+ u8 bypass_val_reg;
+ u8 cmdval_reg;
+ u8 voltsetup_reg;
+ /*VC_SMPS_SA*/
+ u8 smps_sa_shift;
+ u32 smps_sa_mask;
+ /* VC_SMPS_VOL_RA */
+ u8 smps_volra_shift;
+ u32 smps_volra_mask;
+ /* VC_BYPASS_VAL */
+ u8 data_shift;
+ u8 slaveaddr_shift;
+ u8 regaddr_shift;
+ u32 valid;
+ /* VC_CMD_VAL */
+ u8 cmd_on_shift;
+ u8 cmd_onlp_shift;
+ u8 cmd_ret_shift;
+ u8 cmd_off_shift;
+ u32 cmd_on_mask;
+ /* PRM_VOLTSETUP */
+ u8 voltsetup_shift;
+ u32 voltsetup_mask;
+};
+
+/**
+ * omap_vdd_info - Per Voltage Domain info
+ *
+ * @volt_data : voltage table having the distinct voltages supported
+ * by the domain and other associated per voltage data.
+ * @pmic_info : pmic specific parameters which should be populted by
+ * the pmic drivers.
+ * @vp_offs : structure containing the offsets for various
+ * vp registers
+ * @vp_reg : the register values, shifts, masks for various
+ * vp registers
+ * @vc_reg : structure containing various various vc registers,
+ * shifts, masks etc.
+ * @voltdm : pointer to the voltage domain structure
+ * @debug_dir : debug directory for this voltage domain.
+ * @curr_volt : current voltage for this vdd.
+ * @ocp_mod : The prm module for accessing the prm irqstatus reg.
+ * @prm_irqst_reg : prm irqstatus register.
+ * @vp_enabled : flag to keep track of whether vp is enabled or not
+ * @volt_scale : API to scale the voltage of the vdd.
+ */
+struct omap_vdd_info {
+ struct omap_volt_data *volt_data;
+ struct omap_volt_pmic_info *pmic_info;
+ struct vp_reg_offs vp_offs;
+ struct vp_reg_val vp_reg;
+ struct vc_reg_info vc_reg;
+ struct voltagedomain voltdm;
+ struct dentry *debug_dir;
+ u32 curr_volt;
+ u16 ocp_mod;
+ u8 prm_irqst_reg;
+ bool vp_enabled;
+ u32 (*read_reg) (u16 mod, u8 offset);
+ void (*write_reg) (u32 val, u16 mod, u8 offset);
+ int (*volt_scale) (struct omap_vdd_info *vdd,
+ unsigned long target_volt);
+};
+
+static struct omap_vdd_info *vdd_info;
+/*
+ * Number of scalable voltage domains.
+ */
+static int nr_scalable_vdd;
+
+/* OMAP3 VDD sturctures */
+static struct omap_vdd_info omap3_vdd_info[] = {
+ {
+ .vp_offs = {
+ .vpconfig = OMAP3_PRM_VP1_CONFIG_OFFSET,
+ .vstepmin = OMAP3_PRM_VP1_VSTEPMIN_OFFSET,
+ .vstepmax = OMAP3_PRM_VP1_VSTEPMAX_OFFSET,
+ .vlimitto = OMAP3_PRM_VP1_VLIMITTO_OFFSET,
+ .vstatus = OMAP3_PRM_VP1_STATUS_OFFSET,
+ .voltage = OMAP3_PRM_VP1_VOLTAGE_OFFSET,
+ },
+ .voltdm = {
+ .name = "mpu",
+ },
+ },
+ {
+ .vp_offs = {
+ .vpconfig = OMAP3_PRM_VP2_CONFIG_OFFSET,
+ .vstepmin = OMAP3_PRM_VP2_VSTEPMIN_OFFSET,
+ .vstepmax = OMAP3_PRM_VP2_VSTEPMAX_OFFSET,
+ .vlimitto = OMAP3_PRM_VP2_VLIMITTO_OFFSET,
+ .vstatus = OMAP3_PRM_VP2_STATUS_OFFSET,
+ .voltage = OMAP3_PRM_VP2_VOLTAGE_OFFSET,
+ },
+ .voltdm = {
+ .name = "core",
+ },
+ },
+};
+
+#define OMAP3_NR_SCALABLE_VDD ARRAY_SIZE(omap3_vdd_info)
+
+/* OMAP4 VDD sturctures */
+static struct omap_vdd_info omap4_vdd_info[] = {
+ {
+ .vp_offs = {
+ .vpconfig = OMAP4_PRM_VP_MPU_CONFIG_OFFSET,
+ .vstepmin = OMAP4_PRM_VP_MPU_VSTEPMIN_OFFSET,
+ .vstepmax = OMAP4_PRM_VP_MPU_VSTEPMAX_OFFSET,
+ .vlimitto = OMAP4_PRM_VP_MPU_VLIMITTO_OFFSET,
+ .vstatus = OMAP4_PRM_VP_MPU_STATUS_OFFSET,
+ .voltage = OMAP4_PRM_VP_MPU_VOLTAGE_OFFSET,
+ },
+ .voltdm = {
+ .name = "mpu",
+ },
+ },
+ {
+ .vp_offs = {
+ .vpconfig = OMAP4_PRM_VP_IVA_CONFIG_OFFSET,
+ .vstepmin = OMAP4_PRM_VP_IVA_VSTEPMIN_OFFSET,
+ .vstepmax = OMAP4_PRM_VP_IVA_VSTEPMAX_OFFSET,
+ .vlimitto = OMAP4_PRM_VP_IVA_VLIMITTO_OFFSET,
+ .vstatus = OMAP4_PRM_VP_IVA_STATUS_OFFSET,
+ .voltage = OMAP4_PRM_VP_IVA_VOLTAGE_OFFSET,
+ },
+ .voltdm = {
+ .name = "iva",
+ },
+ },
+ {
+ .vp_offs = {
+ .vpconfig = OMAP4_PRM_VP_CORE_CONFIG_OFFSET,
+ .vstepmin = OMAP4_PRM_VP_CORE_VSTEPMIN_OFFSET,
+ .vstepmax = OMAP4_PRM_VP_CORE_VSTEPMAX_OFFSET,
+ .vlimitto = OMAP4_PRM_VP_CORE_VLIMITTO_OFFSET,
+ .vstatus = OMAP4_PRM_VP_CORE_STATUS_OFFSET,
+ .voltage = OMAP4_PRM_VP_CORE_VOLTAGE_OFFSET,
+ },
+ .voltdm = {
+ .name = "core",
+ },
+ },
+};
+
+#define OMAP4_NR_SCALABLE_VDD ARRAY_SIZE(omap4_vdd_info)
+
+/*
+ * Structures containing OMAP3430/OMAP3630 voltage supported and various
+ * voltage dependent data for each VDD.
+ */
+#define VOLT_DATA_DEFINE(_v_nom, _efuse_offs, _errminlimit, _errgain) \
+{ \
+ .volt_nominal = _v_nom, \
+ .sr_efuse_offs = _efuse_offs, \
+ .sr_errminlimit = _errminlimit, \
+ .vp_errgain = _errgain \
+}
+
+/* VDD1 */
+static struct omap_volt_data omap34xx_vddmpu_volt_data[] = {
+ VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP1_UV, OMAP343X_CONTROL_FUSE_OPP1_VDD1, 0xf4, 0x0c),
+ VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP2_UV, OMAP343X_CONTROL_FUSE_OPP2_VDD1, 0xf4, 0x0c),
+ VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP3_UV, OMAP343X_CONTROL_FUSE_OPP3_VDD1, 0xf9, 0x18),
+ VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP4_UV, OMAP343X_CONTROL_FUSE_OPP4_VDD1, 0xf9, 0x18),
+ VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP5_UV, OMAP343X_CONTROL_FUSE_OPP5_VDD1, 0xf9, 0x18),
+ VOLT_DATA_DEFINE(0, 0, 0, 0),
+};
+
+static struct omap_volt_data omap36xx_vddmpu_volt_data[] = {
+ VOLT_DATA_DEFINE(OMAP3630_VDD_MPU_OPP50_UV, OMAP3630_CONTROL_FUSE_OPP50_VDD1, 0xf4, 0x0c),
+ VOLT_DATA_DEFINE(OMAP3630_VDD_MPU_OPP100_UV, OMAP3630_CONTROL_FUSE_OPP100_VDD1, 0xf9, 0x16),
+ VOLT_DATA_DEFINE(OMAP3630_VDD_MPU_OPP120_UV, OMAP3630_CONTROL_FUSE_OPP120_VDD1, 0xfa, 0x23),
+ VOLT_DATA_DEFINE(OMAP3630_VDD_MPU_OPP1G_UV, OMAP3630_CONTROL_FUSE_OPP1G_VDD1, 0xfa, 0x27),
+ VOLT_DATA_DEFINE(0, 0, 0, 0),
+};
+
+/* VDD2 */
+static struct omap_volt_data omap34xx_vddcore_volt_data[] = {
+ VOLT_DATA_DEFINE(OMAP3430_VDD_CORE_OPP1_UV, OMAP343X_CONTROL_FUSE_OPP1_VDD2, 0xf4, 0x0c),
+ VOLT_DATA_DEFINE(OMAP3430_VDD_CORE_OPP2_UV, OMAP343X_CONTROL_FUSE_OPP2_VDD2, 0xf4, 0x0c),
+ VOLT_DATA_DEFINE(OMAP3430_VDD_CORE_OPP3_UV, OMAP343X_CONTROL_FUSE_OPP3_VDD2, 0xf9, 0x18),
+ VOLT_DATA_DEFINE(0, 0, 0, 0),
+};
+
+static struct omap_volt_data omap36xx_vddcore_volt_data[] = {
+ VOLT_DATA_DEFINE(OMAP3630_VDD_CORE_OPP50_UV, OMAP3630_CONTROL_FUSE_OPP50_VDD2, 0xf4, 0x0c),
+ VOLT_DATA_DEFINE(OMAP3630_VDD_CORE_OPP100_UV, OMAP3630_CONTROL_FUSE_OPP100_VDD2, 0xf9, 0x16),
+ VOLT_DATA_DEFINE(0, 0, 0, 0),
+};
+
+/*
+ * Structures containing OMAP4430 voltage supported and various
+ * voltage dependent data for each VDD.
+ */
+static struct omap_volt_data omap44xx_vdd_mpu_volt_data[] = {
+ VOLT_DATA_DEFINE(OMAP4430_VDD_MPU_OPP50_UV, OMAP44XX_CONTROL_FUSE_MPU_OPP50, 0xf4, 0x0c),
+ VOLT_DATA_DEFINE(OMAP4430_VDD_MPU_OPP100_UV, OMAP44XX_CONTROL_FUSE_MPU_OPP100, 0xf9, 0x16),
+ VOLT_DATA_DEFINE(OMAP4430_VDD_MPU_OPPTURBO_UV, OMAP44XX_CONTROL_FUSE_MPU_OPPTURBO, 0xfa, 0x23),
+ VOLT_DATA_DEFINE(OMAP4430_VDD_MPU_OPPNITRO_UV, OMAP44XX_CONTROL_FUSE_MPU_OPPNITRO, 0xfa, 0x27),
+ VOLT_DATA_DEFINE(0, 0, 0, 0),
+};
+
+static struct omap_volt_data omap44xx_vdd_iva_volt_data[] = {
+ VOLT_DATA_DEFINE(OMAP4430_VDD_IVA_OPP50_UV, OMAP44XX_CONTROL_FUSE_IVA_OPP50, 0xf4, 0x0c),
+ VOLT_DATA_DEFINE(OMAP4430_VDD_IVA_OPP100_UV, OMAP44XX_CONTROL_FUSE_IVA_OPP100, 0xf9, 0x16),
+ VOLT_DATA_DEFINE(OMAP4430_VDD_IVA_OPPTURBO_UV, OMAP44XX_CONTROL_FUSE_IVA_OPPTURBO, 0xfa, 0x23),
+ VOLT_DATA_DEFINE(0, 0, 0, 0),
+};
+
+static struct omap_volt_data omap44xx_vdd_core_volt_data[] = {
+ VOLT_DATA_DEFINE(OMAP4430_VDD_CORE_OPP50_UV, OMAP44XX_CONTROL_FUSE_CORE_OPP50, 0xf4, 0x0c),
+ VOLT_DATA_DEFINE(OMAP4430_VDD_CORE_OPP100_UV, OMAP44XX_CONTROL_FUSE_CORE_OPP100, 0xf9, 0x16),
+ VOLT_DATA_DEFINE(0, 0, 0, 0),
+};
+
+static struct dentry *voltage_dir;
+
+/* Init function pointers */
+static void (*vc_init) (struct omap_vdd_info *vdd);
+static int (*vdd_data_configure) (struct omap_vdd_info *vdd);
+
+static u32 omap3_voltage_read_reg(u16 mod, u8 offset)
+{
+ return omap2_prm_read_mod_reg(mod, offset);
+}
+
+static void omap3_voltage_write_reg(u32 val, u16 mod, u8 offset)
+{
+ omap2_prm_write_mod_reg(val, mod, offset);
+}
+
+static u32 omap4_voltage_read_reg(u16 mod, u8 offset)
+{
+ return omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
+ mod, offset);
+}
+
+static void omap4_voltage_write_reg(u32 val, u16 mod, u8 offset)
+{
+ omap4_prminst_write_inst_reg(val, OMAP4430_PRM_PARTITION, mod, offset);
+}
+
+/* Voltage debugfs support */
+static int vp_volt_debug_get(void *data, u64 *val)
+{
+ struct omap_vdd_info *vdd = (struct omap_vdd_info *) data;
+ u8 vsel;
+
+ if (!vdd) {
+ pr_warning("Wrong paramater passed\n");
+ return -EINVAL;
+ }
+
+ vsel = vdd->read_reg(vdd->vp_reg.prm_mod, vdd->vp_offs.voltage);
+ pr_notice("curr_vsel = %x\n", vsel);
+
+ if (!vdd->pmic_info->vsel_to_uv) {
+ pr_warning("PMIC function to convert vsel to voltage"
+ "in uV not registerd\n");
+ return -EINVAL;
+ }
+
+ *val = vdd->pmic_info->vsel_to_uv(vsel);
+ return 0;
+}
+
+static int nom_volt_debug_get(void *data, u64 *val)
+{
+ struct omap_vdd_info *vdd = (struct omap_vdd_info *) data;
+
+ if (!vdd) {
+ pr_warning("Wrong paramater passed\n");
+ return -EINVAL;
+ }
+
+ *val = omap_voltage_get_nom_volt(&vdd->voltdm);
+
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(vp_volt_debug_fops, vp_volt_debug_get, NULL, "%llu\n");
+DEFINE_SIMPLE_ATTRIBUTE(nom_volt_debug_fops, nom_volt_debug_get, NULL,
+ "%llu\n");
+static void vp_latch_vsel(struct omap_vdd_info *vdd)
+{
+ u32 vpconfig;
+ u16 mod;
+ unsigned long uvdc;
+ char vsel;
+
+ uvdc = omap_voltage_get_nom_volt(&vdd->voltdm);
+ if (!uvdc) {
+ pr_warning("%s: unable to find current voltage for vdd_%s\n",
+ __func__, vdd->voltdm.name);
+ return;
+ }
+
+ if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) {
+ pr_warning("%s: PMIC function to convert voltage in uV to"
+ " vsel not registered\n", __func__);
+ return;
+ }
+
+ mod = vdd->vp_reg.prm_mod;
+
+ vsel = vdd->pmic_info->uv_to_vsel(uvdc);
+
+ vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
+ vpconfig &= ~(vdd->vp_reg.vpconfig_initvoltage_mask |
+ vdd->vp_reg.vpconfig_initvdd);
+ vpconfig |= vsel << vdd->vp_reg.vpconfig_initvoltage_shift;
+
+ vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
+
+ /* Trigger initVDD value copy to voltage processor */
+ vdd->write_reg((vpconfig | vdd->vp_reg.vpconfig_initvdd), mod,
+ vdd->vp_offs.vpconfig);
+
+ /* Clear initVDD copy trigger bit */
+ vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
+}
+
+/* Generic voltage init functions */
+static void __init vp_init(struct omap_vdd_info *vdd)
+{
+ u32 vp_val;
+ u16 mod;
+
+ if (!vdd->read_reg || !vdd->write_reg) {
+ pr_err("%s: No read/write API for accessing vdd_%s regs\n",
+ __func__, vdd->voltdm.name);
+ return;
+ }
+
+ mod = vdd->vp_reg.prm_mod;
+
+ vp_val = vdd->vp_reg.vpconfig_erroroffset |
+ (vdd->vp_reg.vpconfig_errorgain <<
+ vdd->vp_reg.vpconfig_errorgain_shift) |
+ vdd->vp_reg.vpconfig_timeouten;
+ vdd->write_reg(vp_val, mod, vdd->vp_offs.vpconfig);
+
+ vp_val = ((vdd->vp_reg.vstepmin_smpswaittimemin <<
+ vdd->vp_reg.vstepmin_smpswaittimemin_shift) |
+ (vdd->vp_reg.vstepmin_stepmin <<
+ vdd->vp_reg.vstepmin_stepmin_shift));
+ vdd->write_reg(vp_val, mod, vdd->vp_offs.vstepmin);
+
+ vp_val = ((vdd->vp_reg.vstepmax_smpswaittimemax <<
+ vdd->vp_reg.vstepmax_smpswaittimemax_shift) |
+ (vdd->vp_reg.vstepmax_stepmax <<
+ vdd->vp_reg.vstepmax_stepmax_shift));
+ vdd->write_reg(vp_val, mod, vdd->vp_offs.vstepmax);
+
+ vp_val = ((vdd->vp_reg.vlimitto_vddmax <<
+ vdd->vp_reg.vlimitto_vddmax_shift) |
+ (vdd->vp_reg.vlimitto_vddmin <<
+ vdd->vp_reg.vlimitto_vddmin_shift) |
+ (vdd->vp_reg.vlimitto_timeout <<
+ vdd->vp_reg.vlimitto_timeout_shift));
+ vdd->write_reg(vp_val, mod, vdd->vp_offs.vlimitto);
+}
+
+static void __init vdd_debugfs_init(struct omap_vdd_info *vdd)
+{
+ char *name;
+
+ name = kzalloc(VOLTAGE_DIR_SIZE, GFP_KERNEL);
+ if (!name) {
+ pr_warning("%s: Unable to allocate memory for debugfs"
+ " directory name for vdd_%s",
+ __func__, vdd->voltdm.name);
+ return;
+ }
+ strcpy(name, "vdd_");
+ strcat(name, vdd->voltdm.name);
+
+ vdd->debug_dir = debugfs_create_dir(name, voltage_dir);
+ if (IS_ERR(vdd->debug_dir)) {
+ pr_warning("%s: Unable to create debugfs directory for"
+ " vdd_%s\n", __func__, vdd->voltdm.name);
+ vdd->debug_dir = NULL;
+ return;
+ }
+
+ (void) debugfs_create_x16("vp_errorgain", S_IRUGO, vdd->debug_dir,
+ &(vdd->vp_reg.vpconfig_errorgain));
+ (void) debugfs_create_x16("vp_smpswaittimemin", S_IRUGO,
+ vdd->debug_dir,
+ &(vdd->vp_reg.vstepmin_smpswaittimemin));
+ (void) debugfs_create_x8("vp_stepmin", S_IRUGO, vdd->debug_dir,
+ &(vdd->vp_reg.vstepmin_stepmin));
+ (void) debugfs_create_x16("vp_smpswaittimemax", S_IRUGO,
+ vdd->debug_dir,
+ &(vdd->vp_reg.vstepmax_smpswaittimemax));
+ (void) debugfs_create_x8("vp_stepmax", S_IRUGO, vdd->debug_dir,
+ &(vdd->vp_reg.vstepmax_stepmax));
+ (void) debugfs_create_x8("vp_vddmax", S_IRUGO, vdd->debug_dir,
+ &(vdd->vp_reg.vlimitto_vddmax));
+ (void) debugfs_create_x8("vp_vddmin", S_IRUGO, vdd->debug_dir,
+ &(vdd->vp_reg.vlimitto_vddmin));
+ (void) debugfs_create_x16("vp_timeout", S_IRUGO, vdd->debug_dir,
+ &(vdd->vp_reg.vlimitto_timeout));
+ (void) debugfs_create_file("curr_vp_volt", S_IRUGO, vdd->debug_dir,
+ (void *) vdd, &vp_volt_debug_fops);
+ (void) debugfs_create_file("curr_nominal_volt", S_IRUGO,
+ vdd->debug_dir, (void *) vdd,
+ &nom_volt_debug_fops);
+}
+
+/* Voltage scale and accessory APIs */
+static int _pre_volt_scale(struct omap_vdd_info *vdd,
+ unsigned long target_volt, u8 *target_vsel, u8 *current_vsel)
+{
+ struct omap_volt_data *volt_data;
+ u32 vc_cmdval, vp_errgain_val;
+ u16 vp_mod, vc_mod;
+
+ /* Check if suffiecient pmic info is available for this vdd */
+ if (!vdd->pmic_info) {
+ pr_err("%s: Insufficient pmic info to scale the vdd_%s\n",
+ __func__, vdd->voltdm.name);
+ return -EINVAL;
+ }
+
+ if (!vdd->pmic_info->uv_to_vsel) {
+ pr_err("%s: PMIC function to convert voltage in uV to"
+ "vsel not registered. Hence unable to scale voltage"
+ "for vdd_%s\n", __func__, vdd->voltdm.name);
+ return -ENODATA;
+ }
+
+ if (!vdd->read_reg || !vdd->write_reg) {
+ pr_err("%s: No read/write API for accessing vdd_%s regs\n",
+ __func__, vdd->voltdm.name);
+ return -EINVAL;
+ }
+
+ vp_mod = vdd->vp_reg.prm_mod;
+ vc_mod = vdd->vc_reg.prm_mod;
+
+ /* Get volt_data corresponding to target_volt */
+ volt_data = omap_voltage_get_voltdata(&vdd->voltdm, target_volt);
+ if (IS_ERR(volt_data))
+ volt_data = NULL;
+
+ *target_vsel = vdd->pmic_info->uv_to_vsel(target_volt);
+ *current_vsel = vdd->read_reg(vp_mod, vdd->vp_offs.voltage);
+
+ /* Setting the ON voltage to the new target voltage */
+ vc_cmdval = vdd->read_reg(vc_mod, vdd->vc_reg.cmdval_reg);
+ vc_cmdval &= ~vdd->vc_reg.cmd_on_mask;
+ vc_cmdval |= (*target_vsel << vdd->vc_reg.cmd_on_shift);
+ vdd->write_reg(vc_cmdval, vc_mod, vdd->vc_reg.cmdval_reg);
+
+ /* Setting vp errorgain based on the voltage */
+ if (volt_data) {
+ vp_errgain_val = vdd->read_reg(vp_mod,
+ vdd->vp_offs.vpconfig);
+ vdd->vp_reg.vpconfig_errorgain = volt_data->vp_errgain;
+ vp_errgain_val &= ~vdd->vp_reg.vpconfig_errorgain_mask;
+ vp_errgain_val |= vdd->vp_reg.vpconfig_errorgain <<
+ vdd->vp_reg.vpconfig_errorgain_shift;
+ vdd->write_reg(vp_errgain_val, vp_mod,
+ vdd->vp_offs.vpconfig);
+ }
+
+ return 0;
+}
+
+static void _post_volt_scale(struct omap_vdd_info *vdd,
+ unsigned long target_volt, u8 target_vsel, u8 current_vsel)
+{
+ u32 smps_steps = 0, smps_delay = 0;
+
+ smps_steps = abs(target_vsel - current_vsel);
+ /* SMPS slew rate / step size. 2us added as buffer. */
+ smps_delay = ((smps_steps * vdd->pmic_info->step_size) /
+ vdd->pmic_info->slew_rate) + 2;
+ udelay(smps_delay);
+
+ vdd->curr_volt = target_volt;
+}
+
+/* vc_bypass_scale_voltage - VC bypass method of voltage scaling */
+static int vc_bypass_scale_voltage(struct omap_vdd_info *vdd,
+ unsigned long target_volt)
+{
+ u32 loop_cnt = 0, retries_cnt = 0;
+ u32 vc_valid, vc_bypass_val_reg, vc_bypass_value;
+ u16 mod;
+ u8 target_vsel, current_vsel;
+ int ret;
+
+ ret = _pre_volt_scale(vdd, target_volt, &target_vsel, &current_vsel);
+ if (ret)
+ return ret;
+
+ mod = vdd->vc_reg.prm_mod;
+
+ vc_valid = vdd->vc_reg.valid;
+ vc_bypass_val_reg = vdd->vc_reg.bypass_val_reg;
+ vc_bypass_value = (target_vsel << vdd->vc_reg.data_shift) |
+ (vdd->pmic_info->pmic_reg <<
+ vdd->vc_reg.regaddr_shift) |
+ (vdd->pmic_info->i2c_slave_addr <<
+ vdd->vc_reg.slaveaddr_shift);
+
+ vdd->write_reg(vc_bypass_value, mod, vc_bypass_val_reg);
+ vdd->write_reg(vc_bypass_value | vc_valid, mod, vc_bypass_val_reg);
+
+ vc_bypass_value = vdd->read_reg(mod, vc_bypass_val_reg);
+ /*
+ * Loop till the bypass command is acknowledged from the SMPS.
+ * NOTE: This is legacy code. The loop count and retry count needs
+ * to be revisited.
+ */
+ while (!(vc_bypass_value & vc_valid)) {
+ loop_cnt++;
+
+ if (retries_cnt > 10) {
+ pr_warning("%s: Retry count exceeded\n", __func__);
+ return -ETIMEDOUT;
+ }
+
+ if (loop_cnt > 50) {
+ retries_cnt++;
+ loop_cnt = 0;
+ udelay(10);
+ }
+ vc_bypass_value = vdd->read_reg(mod, vc_bypass_val_reg);
+ }
+
+ _post_volt_scale(vdd, target_volt, target_vsel, current_vsel);
+ return 0;
+}
+
+/* VP force update method of voltage scaling */
+static int vp_forceupdate_scale_voltage(struct omap_vdd_info *vdd,
+ unsigned long target_volt)
+{
+ u32 vpconfig;
+ u16 mod, ocp_mod;
+ u8 target_vsel, current_vsel, prm_irqst_reg;
+ int ret, timeout = 0;
+
+ ret = _pre_volt_scale(vdd, target_volt, &target_vsel, &current_vsel);
+ if (ret)
+ return ret;
+
+ mod = vdd->vp_reg.prm_mod;
+ ocp_mod = vdd->ocp_mod;
+ prm_irqst_reg = vdd->prm_irqst_reg;
+
+ /*
+ * Clear all pending TransactionDone interrupt/status. Typical latency
+ * is <3us
+ */
+ while (timeout++ < VP_TRANXDONE_TIMEOUT) {
+ vdd->write_reg(vdd->vp_reg.tranxdone_status,
+ ocp_mod, prm_irqst_reg);
+ if (!(vdd->read_reg(ocp_mod, prm_irqst_reg) &
+ vdd->vp_reg.tranxdone_status))
+ break;
+ udelay(1);
+ }
+ if (timeout >= VP_TRANXDONE_TIMEOUT) {
+ pr_warning("%s: vdd_%s TRANXDONE timeout exceeded."
+ "Voltage change aborted", __func__, vdd->voltdm.name);
+ return -ETIMEDOUT;
+ }
+
+ /* Configure for VP-Force Update */
+ vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
+ vpconfig &= ~(vdd->vp_reg.vpconfig_initvdd |
+ vdd->vp_reg.vpconfig_forceupdate |
+ vdd->vp_reg.vpconfig_initvoltage_mask);
+ vpconfig |= ((target_vsel <<
+ vdd->vp_reg.vpconfig_initvoltage_shift));
+ vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
+
+ /* Trigger initVDD value copy to voltage processor */
+ vpconfig |= vdd->vp_reg.vpconfig_initvdd;
+ vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
+
+ /* Force update of voltage */
+ vpconfig |= vdd->vp_reg.vpconfig_forceupdate;
+ vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
+
+ /*
+ * Wait for TransactionDone. Typical latency is <200us.
+ * Depends on SMPSWAITTIMEMIN/MAX and voltage change
+ */
+ timeout = 0;
+ omap_test_timeout((vdd->read_reg(ocp_mod, prm_irqst_reg) &
+ vdd->vp_reg.tranxdone_status),
+ VP_TRANXDONE_TIMEOUT, timeout);
+ if (timeout >= VP_TRANXDONE_TIMEOUT)
+ pr_err("%s: vdd_%s TRANXDONE timeout exceeded."
+ "TRANXDONE never got set after the voltage update\n",
+ __func__, vdd->voltdm.name);
+
+ _post_volt_scale(vdd, target_volt, target_vsel, current_vsel);
+
+ /*
+ * Disable TransactionDone interrupt , clear all status, clear
+ * control registers
+ */
+ timeout = 0;
+ while (timeout++ < VP_TRANXDONE_TIMEOUT) {
+ vdd->write_reg(vdd->vp_reg.tranxdone_status,
+ ocp_mod, prm_irqst_reg);
+ if (!(vdd->read_reg(ocp_mod, prm_irqst_reg) &
+ vdd->vp_reg.tranxdone_status))
+ break;
+ udelay(1);
+ }
+
+ if (timeout >= VP_TRANXDONE_TIMEOUT)
+ pr_warning("%s: vdd_%s TRANXDONE timeout exceeded while trying"
+ "to clear the TRANXDONE status\n",
+ __func__, vdd->voltdm.name);
+
+ vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
+ /* Clear initVDD copy trigger bit */
+ vpconfig &= ~vdd->vp_reg.vpconfig_initvdd;;
+ vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
+ /* Clear force bit */
+ vpconfig &= ~vdd->vp_reg.vpconfig_forceupdate;
+ vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
+
+ return 0;
+}
+
+/* OMAP3 specific voltage init functions */
+
+/*
+ * Intializes the voltage controller registers with the PMIC and board
+ * specific parameters and voltage setup times for OMAP3.
+ */
+static void __init omap3_vc_init(struct omap_vdd_info *vdd)
+{
+ u32 vc_val;
+ u16 mod;
+ u8 on_vsel, onlp_vsel, ret_vsel, off_vsel;
+ static bool is_initialized;
+
+ if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) {
+ pr_err("%s: PMIC info requried to configure vc for"
+ "vdd_%s not populated.Hence cannot initialize vc\n",
+ __func__, vdd->voltdm.name);
+ return;
+ }
+
+ if (!vdd->read_reg || !vdd->write_reg) {
+ pr_err("%s: No read/write API for accessing vdd_%s regs\n",
+ __func__, vdd->voltdm.name);
+ return;
+ }
+
+ mod = vdd->vc_reg.prm_mod;
+
+ /* Set up the SMPS_SA(i2c slave address in VC */
+ vc_val = vdd->read_reg(mod, vdd->vc_reg.smps_sa_reg);
+ vc_val &= ~vdd->vc_reg.smps_sa_mask;
+ vc_val |= vdd->pmic_info->i2c_slave_addr << vdd->vc_reg.smps_sa_shift;
+ vdd->write_reg(vc_val, mod, vdd->vc_reg.smps_sa_reg);
+
+ /* Setup the VOLRA(pmic reg addr) in VC */
+ vc_val = vdd->read_reg(mod, vdd->vc_reg.smps_volra_reg);
+ vc_val &= ~vdd->vc_reg.smps_volra_mask;
+ vc_val |= vdd->pmic_info->pmic_reg << vdd->vc_reg.smps_volra_shift;
+ vdd->write_reg(vc_val, mod, vdd->vc_reg.smps_volra_reg);
+
+ /*Configure the setup times */
+ vc_val = vdd->read_reg(mod, vdd->vc_reg.voltsetup_reg);
+ vc_val &= ~vdd->vc_reg.voltsetup_mask;
+ vc_val |= vdd->pmic_info->volt_setup_time <<
+ vdd->vc_reg.voltsetup_shift;
+ vdd->write_reg(vc_val, mod, vdd->vc_reg.voltsetup_reg);
+
+ /* Set up the on, inactive, retention and off voltage */
+ on_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->on_volt);
+ onlp_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->onlp_volt);
+ ret_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->ret_volt);
+ off_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->off_volt);
+ vc_val = ((on_vsel << vdd->vc_reg.cmd_on_shift) |
+ (onlp_vsel << vdd->vc_reg.cmd_onlp_shift) |
+ (ret_vsel << vdd->vc_reg.cmd_ret_shift) |
+ (off_vsel << vdd->vc_reg.cmd_off_shift));
+ vdd->write_reg(vc_val, mod, vdd->vc_reg.cmdval_reg);
+
+ if (is_initialized)
+ return;
+
+ /* Generic VC parameters init */
+ vdd->write_reg(OMAP3430_CMD1_MASK | OMAP3430_RAV1_MASK, mod,
+ OMAP3_PRM_VC_CH_CONF_OFFSET);
+ vdd->write_reg(OMAP3430_MCODE_SHIFT | OMAP3430_HSEN_MASK, mod,
+ OMAP3_PRM_VC_I2C_CFG_OFFSET);
+ vdd->write_reg(OMAP3_CLKSETUP, mod, OMAP3_PRM_CLKSETUP_OFFSET);
+ vdd->write_reg(OMAP3_VOLTOFFSET, mod, OMAP3_PRM_VOLTOFFSET_OFFSET);
+ vdd->write_reg(OMAP3_VOLTSETUP2, mod, OMAP3_PRM_VOLTSETUP2_OFFSET);
+ is_initialized = true;
+}
+
+/* Sets up all the VDD related info for OMAP3 */
+static int __init omap3_vdd_data_configure(struct omap_vdd_info *vdd)
+{
+ struct clk *sys_ck;
+ u32 sys_clk_speed, timeout_val, waittime;
+
+ if (!vdd->pmic_info) {
+ pr_err("%s: PMIC info requried to configure vdd_%s not"
+ "populated.Hence cannot initialize vdd_%s\n",
+ __func__, vdd->voltdm.name, vdd->voltdm.name);
+ return -EINVAL;
+ }
+
+ if (!strcmp(vdd->voltdm.name, "mpu")) {
+ if (cpu_is_omap3630())
+ vdd->volt_data = omap36xx_vddmpu_volt_data;
+ else
+ vdd->volt_data = omap34xx_vddmpu_volt_data;
+
+ vdd->vp_reg.tranxdone_status = OMAP3430_VP1_TRANXDONE_ST_MASK;
+ vdd->vc_reg.cmdval_reg = OMAP3_PRM_VC_CMD_VAL_0_OFFSET;
+ vdd->vc_reg.smps_sa_shift = OMAP3430_PRM_VC_SMPS_SA_SA0_SHIFT;
+ vdd->vc_reg.smps_sa_mask = OMAP3430_PRM_VC_SMPS_SA_SA0_MASK;
+ vdd->vc_reg.smps_volra_shift = OMAP3430_VOLRA0_SHIFT;
+ vdd->vc_reg.smps_volra_mask = OMAP3430_VOLRA0_MASK;
+ vdd->vc_reg.voltsetup_shift = OMAP3430_SETUP_TIME1_SHIFT;
+ vdd->vc_reg.voltsetup_mask = OMAP3430_SETUP_TIME1_MASK;
+ } else if (!strcmp(vdd->voltdm.name, "core")) {
+ if (cpu_is_omap3630())
+ vdd->volt_data = omap36xx_vddcore_volt_data;
+ else
+ vdd->volt_data = omap34xx_vddcore_volt_data;
+
+ vdd->vp_reg.tranxdone_status = OMAP3430_VP2_TRANXDONE_ST_MASK;
+ vdd->vc_reg.cmdval_reg = OMAP3_PRM_VC_CMD_VAL_1_OFFSET;
+ vdd->vc_reg.smps_sa_shift = OMAP3430_PRM_VC_SMPS_SA_SA1_SHIFT;
+ vdd->vc_reg.smps_sa_mask = OMAP3430_PRM_VC_SMPS_SA_SA1_MASK;
+ vdd->vc_reg.smps_volra_shift = OMAP3430_VOLRA1_SHIFT;
+ vdd->vc_reg.smps_volra_mask = OMAP3430_VOLRA1_MASK;
+ vdd->vc_reg.voltsetup_shift = OMAP3430_SETUP_TIME2_SHIFT;
+ vdd->vc_reg.voltsetup_mask = OMAP3430_SETUP_TIME2_MASK;
+ } else {
+ pr_warning("%s: vdd_%s does not exisit in OMAP3\n",
+ __func__, vdd->voltdm.name);
+ return -EINVAL;
+ }
+
+ /*
+ * Sys clk rate is require to calculate vp timeout value and
+ * smpswaittimemin and smpswaittimemax.
+ */
+ sys_ck = clk_get(NULL, "sys_ck");
+ if (IS_ERR(sys_ck)) {
+ pr_warning("%s: Could not get the sys clk to calculate"
+ "various vdd_%s params\n", __func__, vdd->voltdm.name);
+ return -EINVAL;
+ }
+ sys_clk_speed = clk_get_rate(sys_ck);
+ clk_put(sys_ck);
+ /* Divide to avoid overflow */
+ sys_clk_speed /= 1000;
+
+ /* Generic voltage parameters */
+ vdd->curr_volt = 1200000;
+ vdd->ocp_mod = OCP_MOD;
+ vdd->prm_irqst_reg = OMAP3_PRM_IRQSTATUS_MPU_OFFSET;
+ vdd->read_reg = omap3_voltage_read_reg;
+ vdd->write_reg = omap3_voltage_write_reg;
+ vdd->volt_scale = vp_forceupdate_scale_voltage;
+ vdd->vp_enabled = false;
+
+ /* VC parameters */
+ vdd->vc_reg.prm_mod = OMAP3430_GR_MOD;
+ vdd->vc_reg.smps_sa_reg = OMAP3_PRM_VC_SMPS_SA_OFFSET;
+ vdd->vc_reg.smps_volra_reg = OMAP3_PRM_VC_SMPS_VOL_RA_OFFSET;
+ vdd->vc_reg.bypass_val_reg = OMAP3_PRM_VC_BYPASS_VAL_OFFSET;
+ vdd->vc_reg.voltsetup_reg = OMAP3_PRM_VOLTSETUP1_OFFSET;
+ vdd->vc_reg.data_shift = OMAP3430_DATA_SHIFT;
+ vdd->vc_reg.slaveaddr_shift = OMAP3430_SLAVEADDR_SHIFT;
+ vdd->vc_reg.regaddr_shift = OMAP3430_REGADDR_SHIFT;
+ vdd->vc_reg.valid = OMAP3430_VALID_MASK;
+ vdd->vc_reg.cmd_on_shift = OMAP3430_VC_CMD_ON_SHIFT;
+ vdd->vc_reg.cmd_on_mask = OMAP3430_VC_CMD_ON_MASK;
+ vdd->vc_reg.cmd_onlp_shift = OMAP3430_VC_CMD_ONLP_SHIFT;
+ vdd->vc_reg.cmd_ret_shift = OMAP3430_VC_CMD_RET_SHIFT;
+ vdd->vc_reg.cmd_off_shift = OMAP3430_VC_CMD_OFF_SHIFT;
+
+ vdd->vp_reg.prm_mod = OMAP3430_GR_MOD;
+
+ /* VPCONFIG bit fields */
+ vdd->vp_reg.vpconfig_erroroffset = (vdd->pmic_info->vp_erroroffset <<
+ OMAP3430_ERROROFFSET_SHIFT);
+ vdd->vp_reg.vpconfig_errorgain_mask = OMAP3430_ERRORGAIN_MASK;
+ vdd->vp_reg.vpconfig_errorgain_shift = OMAP3430_ERRORGAIN_SHIFT;
+ vdd->vp_reg.vpconfig_initvoltage_shift = OMAP3430_INITVOLTAGE_SHIFT;
+ vdd->vp_reg.vpconfig_initvoltage_mask = OMAP3430_INITVOLTAGE_MASK;
+ vdd->vp_reg.vpconfig_timeouten = OMAP3430_TIMEOUTEN_MASK;
+ vdd->vp_reg.vpconfig_initvdd = OMAP3430_INITVDD_MASK;
+ vdd->vp_reg.vpconfig_forceupdate = OMAP3430_FORCEUPDATE_MASK;
+ vdd->vp_reg.vpconfig_vpenable = OMAP3430_VPENABLE_MASK;
+
+ /* VSTEPMIN VSTEPMAX bit fields */
+ waittime = ((vdd->pmic_info->step_size / vdd->pmic_info->slew_rate) *
+ sys_clk_speed) / 1000;
+ vdd->vp_reg.vstepmin_smpswaittimemin = waittime;
+ vdd->vp_reg.vstepmax_smpswaittimemax = waittime;
+ vdd->vp_reg.vstepmin_stepmin = vdd->pmic_info->vp_vstepmin;
+ vdd->vp_reg.vstepmax_stepmax = vdd->pmic_info->vp_vstepmax;
+ vdd->vp_reg.vstepmin_smpswaittimemin_shift =
+ OMAP3430_SMPSWAITTIMEMIN_SHIFT;
+ vdd->vp_reg.vstepmax_smpswaittimemax_shift =
+ OMAP3430_SMPSWAITTIMEMAX_SHIFT;
+ vdd->vp_reg.vstepmin_stepmin_shift = OMAP3430_VSTEPMIN_SHIFT;
+ vdd->vp_reg.vstepmax_stepmax_shift = OMAP3430_VSTEPMAX_SHIFT;
+
+ /* VLIMITTO bit fields */
+ timeout_val = (sys_clk_speed * vdd->pmic_info->vp_timeout_us) / 1000;
+ vdd->vp_reg.vlimitto_timeout = timeout_val;
+ vdd->vp_reg.vlimitto_vddmin = vdd->pmic_info->vp_vddmin;
+ vdd->vp_reg.vlimitto_vddmax = vdd->pmic_info->vp_vddmax;
+ vdd->vp_reg.vlimitto_vddmin_shift = OMAP3430_VDDMIN_SHIFT;
+ vdd->vp_reg.vlimitto_vddmax_shift = OMAP3430_VDDMAX_SHIFT;
+ vdd->vp_reg.vlimitto_timeout_shift = OMAP3430_TIMEOUT_SHIFT;
+
+ return 0;
+}
+
+/* OMAP4 specific voltage init functions */
+static void __init omap4_vc_init(struct omap_vdd_info *vdd)
+{
+ u32 vc_val;
+ u16 mod;
+ static bool is_initialized;
+
+ if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) {
+ pr_err("%s: PMIC info requried to configure vc for"
+ "vdd_%s not populated.Hence cannot initialize vc\n",
+ __func__, vdd->voltdm.name);
+ return;
+ }
+
+ if (!vdd->read_reg || !vdd->write_reg) {
+ pr_err("%s: No read/write API for accessing vdd_%s regs\n",
+ __func__, vdd->voltdm.name);
+ return;
+ }
+
+ mod = vdd->vc_reg.prm_mod;
+
+ /* Set up the SMPS_SA(i2c slave address in VC */
+ vc_val = vdd->read_reg(mod, vdd->vc_reg.smps_sa_reg);
+ vc_val &= ~vdd->vc_reg.smps_sa_mask;
+ vc_val |= vdd->pmic_info->i2c_slave_addr << vdd->vc_reg.smps_sa_shift;
+ vdd->write_reg(vc_val, mod, vdd->vc_reg.smps_sa_reg);
+
+ /* Setup the VOLRA(pmic reg addr) in VC */
+ vc_val = vdd->read_reg(mod, vdd->vc_reg.smps_volra_reg);
+ vc_val &= ~vdd->vc_reg.smps_volra_mask;
+ vc_val |= vdd->pmic_info->pmic_reg << vdd->vc_reg.smps_volra_shift;
+ vdd->write_reg(vc_val, mod, vdd->vc_reg.smps_volra_reg);
+
+ /* TODO: Configure setup times and CMD_VAL values*/
+
+ if (is_initialized)
+ return;
+
+ /* Generic VC parameters init */
+ vc_val = (OMAP4430_RAV_VDD_MPU_L_MASK | OMAP4430_CMD_VDD_MPU_L_MASK |
+ OMAP4430_RAV_VDD_IVA_L_MASK | OMAP4430_CMD_VDD_IVA_L_MASK |
+ OMAP4430_RAV_VDD_CORE_L_MASK | OMAP4430_CMD_VDD_CORE_L_MASK);
+ vdd->write_reg(vc_val, mod, OMAP4_PRM_VC_CFG_CHANNEL_OFFSET);
+
+ vc_val = (0x60 << OMAP4430_SCLL_SHIFT | 0x26 << OMAP4430_SCLH_SHIFT);
+ vdd->write_reg(vc_val, mod, OMAP4_PRM_VC_CFG_I2C_CLK_OFFSET);
+
+ is_initialized = true;
+}
+
+/* Sets up all the VDD related info for OMAP4 */
+static int __init omap4_vdd_data_configure(struct omap_vdd_info *vdd)
+{
+ struct clk *sys_ck;
+ u32 sys_clk_speed, timeout_val, waittime;
+
+ if (!vdd->pmic_info) {
+ pr_err("%s: PMIC info requried to configure vdd_%s not"
+ "populated.Hence cannot initialize vdd_%s\n",
+ __func__, vdd->voltdm.name, vdd->voltdm.name);
+ return -EINVAL;
+ }
+
+ if (!strcmp(vdd->voltdm.name, "mpu")) {
+ vdd->volt_data = omap44xx_vdd_mpu_volt_data;
+ vdd->vp_reg.tranxdone_status =
+ OMAP4430_VP_MPU_TRANXDONE_ST_MASK;
+ vdd->vc_reg.cmdval_reg = OMAP4_PRM_VC_VAL_CMD_VDD_MPU_L_OFFSET;
+ vdd->vc_reg.smps_sa_shift =
+ OMAP4430_SA_VDD_MPU_L_PRM_VC_SMPS_SA_SHIFT;
+ vdd->vc_reg.smps_sa_mask =
+ OMAP4430_SA_VDD_MPU_L_PRM_VC_SMPS_SA_MASK;
+ vdd->vc_reg.smps_volra_shift = OMAP4430_VOLRA_VDD_MPU_L_SHIFT;
+ vdd->vc_reg.smps_volra_mask = OMAP4430_VOLRA_VDD_MPU_L_MASK;
+ vdd->vc_reg.voltsetup_reg =
+ OMAP4_PRM_VOLTSETUP_MPU_RET_SLEEP_OFFSET;
+ vdd->prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET;
+ } else if (!strcmp(vdd->voltdm.name, "core")) {
+ vdd->volt_data = omap44xx_vdd_core_volt_data;
+ vdd->vp_reg.tranxdone_status =
+ OMAP4430_VP_CORE_TRANXDONE_ST_MASK;
+ vdd->vc_reg.cmdval_reg =
+ OMAP4_PRM_VC_VAL_CMD_VDD_CORE_L_OFFSET;
+ vdd->vc_reg.smps_sa_shift = OMAP4430_SA_VDD_CORE_L_0_6_SHIFT;
+ vdd->vc_reg.smps_sa_mask = OMAP4430_SA_VDD_CORE_L_0_6_MASK;
+ vdd->vc_reg.smps_volra_shift = OMAP4430_VOLRA_VDD_CORE_L_SHIFT;
+ vdd->vc_reg.smps_volra_mask = OMAP4430_VOLRA_VDD_CORE_L_MASK;
+ vdd->vc_reg.voltsetup_reg =
+ OMAP4_PRM_VOLTSETUP_CORE_RET_SLEEP_OFFSET;
+ vdd->prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET;
+ } else if (!strcmp(vdd->voltdm.name, "iva")) {
+ vdd->volt_data = omap44xx_vdd_iva_volt_data;
+ vdd->vp_reg.tranxdone_status =
+ OMAP4430_VP_IVA_TRANXDONE_ST_MASK;
+ vdd->vc_reg.cmdval_reg = OMAP4_PRM_VC_VAL_CMD_VDD_IVA_L_OFFSET;
+ vdd->vc_reg.smps_sa_shift =
+ OMAP4430_SA_VDD_IVA_L_PRM_VC_SMPS_SA_SHIFT;
+ vdd->vc_reg.smps_sa_mask =
+ OMAP4430_SA_VDD_IVA_L_PRM_VC_SMPS_SA_MASK;
+ vdd->vc_reg.smps_volra_shift = OMAP4430_VOLRA_VDD_IVA_L_SHIFT;
+ vdd->vc_reg.smps_volra_mask = OMAP4430_VOLRA_VDD_IVA_L_MASK;
+ vdd->vc_reg.voltsetup_reg =
+ OMAP4_PRM_VOLTSETUP_IVA_RET_SLEEP_OFFSET;
+ vdd->prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET;
+ } else {
+ pr_warning("%s: vdd_%s does not exisit in OMAP4\n",
+ __func__, vdd->voltdm.name);
+ return -EINVAL;
+ }
+
+ /*
+ * Sys clk rate is require to calculate vp timeout value and
+ * smpswaittimemin and smpswaittimemax.
+ */
+ sys_ck = clk_get(NULL, "sys_clkin_ck");
+ if (IS_ERR(sys_ck)) {
+ pr_warning("%s: Could not get the sys clk to calculate"
+ "various vdd_%s params\n", __func__, vdd->voltdm.name);
+ return -EINVAL;
+ }
+ sys_clk_speed = clk_get_rate(sys_ck);
+ clk_put(sys_ck);
+ /* Divide to avoid overflow */
+ sys_clk_speed /= 1000;
+
+ /* Generic voltage parameters */
+ vdd->curr_volt = 1200000;
+ vdd->ocp_mod = OMAP4430_PRM_OCP_SOCKET_INST;
+ vdd->read_reg = omap4_voltage_read_reg;
+ vdd->write_reg = omap4_voltage_write_reg;
+ vdd->volt_scale = vp_forceupdate_scale_voltage;
+ vdd->vp_enabled = false;
+
+ /* VC parameters */
+ vdd->vc_reg.prm_mod = OMAP4430_PRM_DEVICE_INST;
+ vdd->vc_reg.smps_sa_reg = OMAP4_PRM_VC_SMPS_SA_OFFSET;
+ vdd->vc_reg.smps_volra_reg = OMAP4_PRM_VC_VAL_SMPS_RA_VOL_OFFSET;
+ vdd->vc_reg.bypass_val_reg = OMAP4_PRM_VC_VAL_BYPASS_OFFSET;
+ vdd->vc_reg.data_shift = OMAP4430_DATA_SHIFT;
+ vdd->vc_reg.slaveaddr_shift = OMAP4430_SLAVEADDR_SHIFT;
+ vdd->vc_reg.regaddr_shift = OMAP4430_REGADDR_SHIFT;
+ vdd->vc_reg.valid = OMAP4430_VALID_MASK;
+ vdd->vc_reg.cmd_on_shift = OMAP4430_ON_SHIFT;
+ vdd->vc_reg.cmd_on_mask = OMAP4430_ON_MASK;
+ vdd->vc_reg.cmd_onlp_shift = OMAP4430_ONLP_SHIFT;
+ vdd->vc_reg.cmd_ret_shift = OMAP4430_RET_SHIFT;
+ vdd->vc_reg.cmd_off_shift = OMAP4430_OFF_SHIFT;
+
+ vdd->vp_reg.prm_mod = OMAP4430_PRM_DEVICE_INST;
+
+ /* VPCONFIG bit fields */
+ vdd->vp_reg.vpconfig_erroroffset = (vdd->pmic_info->vp_erroroffset <<
+ OMAP4430_ERROROFFSET_SHIFT);
+ vdd->vp_reg.vpconfig_errorgain_mask = OMAP4430_ERRORGAIN_MASK;
+ vdd->vp_reg.vpconfig_errorgain_shift = OMAP4430_ERRORGAIN_SHIFT;
+ vdd->vp_reg.vpconfig_initvoltage_shift = OMAP4430_INITVOLTAGE_SHIFT;
+ vdd->vp_reg.vpconfig_initvoltage_mask = OMAP4430_INITVOLTAGE_MASK;
+ vdd->vp_reg.vpconfig_timeouten = OMAP4430_TIMEOUTEN_MASK;
+ vdd->vp_reg.vpconfig_initvdd = OMAP4430_INITVDD_MASK;
+ vdd->vp_reg.vpconfig_forceupdate = OMAP4430_FORCEUPDATE_MASK;
+ vdd->vp_reg.vpconfig_vpenable = OMAP4430_VPENABLE_MASK;
+
+ /* VSTEPMIN VSTEPMAX bit fields */
+ waittime = ((vdd->pmic_info->step_size / vdd->pmic_info->slew_rate) *
+ sys_clk_speed) / 1000;
+ vdd->vp_reg.vstepmin_smpswaittimemin = waittime;
+ vdd->vp_reg.vstepmax_smpswaittimemax = waittime;
+ vdd->vp_reg.vstepmin_stepmin = vdd->pmic_info->vp_vstepmin;
+ vdd->vp_reg.vstepmax_stepmax = vdd->pmic_info->vp_vstepmax;
+ vdd->vp_reg.vstepmin_smpswaittimemin_shift =
+ OMAP4430_SMPSWAITTIMEMIN_SHIFT;
+ vdd->vp_reg.vstepmax_smpswaittimemax_shift =
+ OMAP4430_SMPSWAITTIMEMAX_SHIFT;
+ vdd->vp_reg.vstepmin_stepmin_shift = OMAP4430_VSTEPMIN_SHIFT;
+ vdd->vp_reg.vstepmax_stepmax_shift = OMAP4430_VSTEPMAX_SHIFT;
+
+ /* VLIMITTO bit fields */
+ timeout_val = (sys_clk_speed * vdd->pmic_info->vp_timeout_us) / 1000;
+ vdd->vp_reg.vlimitto_timeout = timeout_val;
+ vdd->vp_reg.vlimitto_vddmin = vdd->pmic_info->vp_vddmin;
+ vdd->vp_reg.vlimitto_vddmax = vdd->pmic_info->vp_vddmax;
+ vdd->vp_reg.vlimitto_vddmin_shift = OMAP4430_VDDMIN_SHIFT;
+ vdd->vp_reg.vlimitto_vddmax_shift = OMAP4430_VDDMAX_SHIFT;
+ vdd->vp_reg.vlimitto_timeout_shift = OMAP4430_TIMEOUT_SHIFT;
+
+ return 0;
+}
+
+/* Public functions */
+/**
+ * omap_voltage_get_nom_volt() - Gets the current non-auto-compensated voltage
+ * @voltdm: pointer to the VDD for which current voltage info is needed
+ *
+ * API to get the current non-auto-compensated voltage for a VDD.
+ * Returns 0 in case of error else returns the current voltage for the VDD.
+ */
+unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm)
+{
+ struct omap_vdd_info *vdd;
+
+ if (!voltdm || IS_ERR(voltdm)) {
+ pr_warning("%s: VDD specified does not exist!\n", __func__);
+ return 0;
+ }
+
+ vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
+
+ return vdd->curr_volt;
+}
+
+/**
+ * omap_vp_get_curr_volt() - API to get the current vp voltage.
+ * @voltdm: pointer to the VDD.
+ *
+ * This API returns the current voltage for the specified voltage processor
+ */
+unsigned long omap_vp_get_curr_volt(struct voltagedomain *voltdm)
+{
+ struct omap_vdd_info *vdd;
+ u8 curr_vsel;
+
+ if (!voltdm || IS_ERR(voltdm)) {
+ pr_warning("%s: VDD specified does not exist!\n", __func__);
+ return 0;
+ }
+
+ vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
+ if (!vdd->read_reg) {
+ pr_err("%s: No read API for reading vdd_%s regs\n",
+ __func__, voltdm->name);
+ return 0;
+ }
+
+ curr_vsel = vdd->read_reg(vdd->vp_reg.prm_mod,
+ vdd->vp_offs.voltage);
+
+ if (!vdd->pmic_info || !vdd->pmic_info->vsel_to_uv) {
+ pr_warning("%s: PMIC function to convert vsel to voltage"
+ "in uV not registerd\n", __func__);
+ return 0;
+ }
+
+ return vdd->pmic_info->vsel_to_uv(curr_vsel);
+}
+
+/**
+ * omap_vp_enable() - API to enable a particular VP
+ * @voltdm: pointer to the VDD whose VP is to be enabled.
+ *
+ * This API enables a particular voltage processor. Needed by the smartreflex
+ * class drivers.
+ */
+void omap_vp_enable(struct voltagedomain *voltdm)
+{
+ struct omap_vdd_info *vdd;
+ u32 vpconfig;
+ u16 mod;
+
+ if (!voltdm || IS_ERR(voltdm)) {
+ pr_warning("%s: VDD specified does not exist!\n", __func__);
+ return;
+ }
+
+ vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
+ if (!vdd->read_reg || !vdd->write_reg) {
+ pr_err("%s: No read/write API for accessing vdd_%s regs\n",
+ __func__, voltdm->name);
+ return;
+ }
+
+ mod = vdd->vp_reg.prm_mod;
+
+ /* If VP is already enabled, do nothing. Return */
+ if (vdd->vp_enabled)
+ return;
+
+ vp_latch_vsel(vdd);
+
+ /* Enable VP */
+ vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
+ vpconfig |= vdd->vp_reg.vpconfig_vpenable;
+ vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
+ vdd->vp_enabled = true;
+}
+
+/**
+ * omap_vp_disable() - API to disable a particular VP
+ * @voltdm: pointer to the VDD whose VP is to be disabled.
+ *
+ * This API disables a particular voltage processor. Needed by the smartreflex
+ * class drivers.
+ */
+void omap_vp_disable(struct voltagedomain *voltdm)
+{
+ struct omap_vdd_info *vdd;
+ u32 vpconfig;
+ u16 mod;
+ int timeout;
+
+ if (!voltdm || IS_ERR(voltdm)) {
+ pr_warning("%s: VDD specified does not exist!\n", __func__);
+ return;
+ }
+
+ vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
+ if (!vdd->read_reg || !vdd->write_reg) {
+ pr_err("%s: No read/write API for accessing vdd_%s regs\n",
+ __func__, voltdm->name);
+ return;
+ }
+
+ mod = vdd->vp_reg.prm_mod;
+
+ /* If VP is already disabled, do nothing. Return */
+ if (!vdd->vp_enabled) {
+ pr_warning("%s: Trying to disable VP for vdd_%s when"
+ "it is already disabled\n", __func__, voltdm->name);
+ return;
+ }
+
+ /* Disable VP */
+ vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
+ vpconfig &= ~vdd->vp_reg.vpconfig_vpenable;
+ vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
+
+ /*
+ * Wait for VP idle Typical latency is <2us. Maximum latency is ~100us
+ */
+ omap_test_timeout((vdd->read_reg(mod, vdd->vp_offs.vstatus)),
+ VP_IDLE_TIMEOUT, timeout);
+
+ if (timeout >= VP_IDLE_TIMEOUT)
+ pr_warning("%s: vdd_%s idle timedout\n",
+ __func__, voltdm->name);
+
+ vdd->vp_enabled = false;
+
+ return;
+}
+
+/**
+ * omap_voltage_scale_vdd() - API to scale voltage of a particular
+ * voltage domain.
+ * @voltdm: pointer to the VDD which is to be scaled.
+ * @target_volt: The target voltage of the voltage domain
+ *
+ * This API should be called by the kernel to do the voltage scaling
+ * for a particular voltage domain during dvfs or any other situation.
+ */
+int omap_voltage_scale_vdd(struct voltagedomain *voltdm,
+ unsigned long target_volt)
+{
+ struct omap_vdd_info *vdd;
+
+ if (!voltdm || IS_ERR(voltdm)) {
+ pr_warning("%s: VDD specified does not exist!\n", __func__);
+ return -EINVAL;
+ }
+
+ vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
+
+ if (!vdd->volt_scale) {
+ pr_err("%s: No voltage scale API registered for vdd_%s\n",
+ __func__, voltdm->name);
+ return -ENODATA;
+ }
+
+ return vdd->volt_scale(vdd, target_volt);
+}
+
+/**
+ * omap_voltage_reset() - Resets the voltage of a particular voltage domain
+ * to that of the current OPP.
+ * @voltdm: pointer to the VDD whose voltage is to be reset.
+ *
+ * This API finds out the correct voltage the voltage domain is supposed
+ * to be at and resets the voltage to that level. Should be used expecially
+ * while disabling any voltage compensation modules.
+ */
+void omap_voltage_reset(struct voltagedomain *voltdm)
+{
+ unsigned long target_uvdc;
+
+ if (!voltdm || IS_ERR(voltdm)) {
+ pr_warning("%s: VDD specified does not exist!\n", __func__);
+ return;
+ }
+
+ target_uvdc = omap_voltage_get_nom_volt(voltdm);
+ if (!target_uvdc) {
+ pr_err("%s: unable to find current voltage for vdd_%s\n",
+ __func__, voltdm->name);
+ return;
+ }
+
+ omap_voltage_scale_vdd(voltdm, target_uvdc);
+}
+
+/**
+ * omap_voltage_get_volttable() - API to get the voltage table associated with a
+ * particular voltage domain.
+ * @voltdm: pointer to the VDD for which the voltage table is required
+ * @volt_data: the voltage table for the particular vdd which is to be
+ * populated by this API
+ *
+ * This API populates the voltage table associated with a VDD into the
+ * passed parameter pointer. Returns the count of distinct voltages
+ * supported by this vdd.
+ *
+ */
+void omap_voltage_get_volttable(struct voltagedomain *voltdm,
+ struct omap_volt_data **volt_data)
+{
+ struct omap_vdd_info *vdd;
+
+ if (!voltdm || IS_ERR(voltdm)) {
+ pr_warning("%s: VDD specified does not exist!\n", __func__);
+ return;
+ }
+
+ vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
+
+ *volt_data = vdd->volt_data;
+}
+
+/**
+ * omap_voltage_get_voltdata() - API to get the voltage table entry for a
+ * particular voltage
+ * @voltdm: pointer to the VDD whose voltage table has to be searched
+ * @volt: the voltage to be searched in the voltage table
+ *
+ * This API searches through the voltage table for the required voltage
+ * domain and tries to find a matching entry for the passed voltage volt.
+ * If a matching entry is found volt_data is populated with that entry.
+ * This API searches only through the non-compensated voltages int the
+ * voltage table.
+ * Returns pointer to the voltage table entry corresponding to volt on
+ * sucess. Returns -ENODATA if no voltage table exisits for the passed voltage
+ * domain or if there is no matching entry.
+ */
+struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
+ unsigned long volt)
+{
+ struct omap_vdd_info *vdd;
+ int i;
+
+ if (!voltdm || IS_ERR(voltdm)) {
+ pr_warning("%s: VDD specified does not exist!\n", __func__);
+ return ERR_PTR(-EINVAL);
+ }
+
+ vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
+
+ if (!vdd->volt_data) {
+ pr_warning("%s: voltage table does not exist for vdd_%s\n",
+ __func__, voltdm->name);
+ return ERR_PTR(-ENODATA);
+ }
+
+ for (i = 0; vdd->volt_data[i].volt_nominal != 0; i++) {
+ if (vdd->volt_data[i].volt_nominal == volt)
+ return &vdd->volt_data[i];
+ }
+
+ pr_notice("%s: Unable to match the current voltage with the voltage"
+ "table for vdd_%s\n", __func__, voltdm->name);
+
+ return ERR_PTR(-ENODATA);
+}
+
+/**
+ * omap_voltage_register_pmic() - API to register PMIC specific data
+ * @voltdm: pointer to the VDD for which the PMIC specific data is
+ * to be registered
+ * @pmic_info: the structure containing pmic info
+ *
+ * This API is to be called by the SOC/PMIC file to specify the
+ * pmic specific info as present in omap_volt_pmic_info structure.
+ */
+int omap_voltage_register_pmic(struct voltagedomain *voltdm,
+ struct omap_volt_pmic_info *pmic_info)
+{
+ struct omap_vdd_info *vdd;
+
+ if (!voltdm || IS_ERR(voltdm)) {
+ pr_warning("%s: VDD specified does not exist!\n", __func__);
+ return -EINVAL;
+ }
+
+ vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
+
+ vdd->pmic_info = pmic_info;
+
+ return 0;
+}
+
+/**
+ * omap_voltage_get_dbgdir() - API to get pointer to the debugfs directory
+ * corresponding to a voltage domain.
+ *
+ * @voltdm: pointer to the VDD whose debug directory is required.
+ *
+ * This API returns pointer to the debugfs directory corresponding
+ * to the voltage domain. Should be used by drivers requiring to
+ * add any debug entry for a particular voltage domain. Returns NULL
+ * in case of error.
+ */
+struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm)
+{
+ struct omap_vdd_info *vdd;
+
+ if (!voltdm || IS_ERR(voltdm)) {
+ pr_warning("%s: VDD specified does not exist!\n", __func__);
+ return NULL;
+ }
+
+ vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
+
+ return vdd->debug_dir;
+}
+
+/**
+ * omap_change_voltscale_method() - API to change the voltage scaling method.
+ * @voltdm: pointer to the VDD whose voltage scaling method
+ * has to be changed.
+ * @voltscale_method: the method to be used for voltage scaling.
+ *
+ * This API can be used by the board files to change the method of voltage
+ * scaling between vpforceupdate and vcbypass. The parameter values are
+ * defined in voltage.h
+ */
+void omap_change_voltscale_method(struct voltagedomain *voltdm,
+ int voltscale_method)
+{
+ struct omap_vdd_info *vdd;
+
+ if (!voltdm || IS_ERR(voltdm)) {
+ pr_warning("%s: VDD specified does not exist!\n", __func__);
+ return;
+ }
+
+ vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
+
+ switch (voltscale_method) {
+ case VOLTSCALE_VPFORCEUPDATE:
+ vdd->volt_scale = vp_forceupdate_scale_voltage;
+ return;
+ case VOLTSCALE_VCBYPASS:
+ vdd->volt_scale = vc_bypass_scale_voltage;
+ return;
+ default:
+ pr_warning("%s: Trying to change the method of voltage scaling"
+ "to an unsupported one!\n", __func__);
+ }
+}
+
+/**
+ * omap_voltage_domain_lookup() - API to get the voltage domain pointer
+ * @name: Name of the voltage domain
+ *
+ * This API looks up in the global vdd_info struct for the
+ * existence of voltage domain <name>. If it exists, the API returns
+ * a pointer to the voltage domain structure corresponding to the
+ * VDD<name>. Else retuns error pointer.
+ */
+struct voltagedomain *omap_voltage_domain_lookup(char *name)
+{
+ int i;
+
+ if (!vdd_info) {
+ pr_err("%s: Voltage driver init not yet happened.Faulting!\n",
+ __func__);
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (!name) {
+ pr_err("%s: No name to get the votage domain!\n", __func__);
+ return ERR_PTR(-EINVAL);
+ }
+
+ for (i = 0; i < nr_scalable_vdd; i++) {
+ if (!(strcmp(name, vdd_info[i].voltdm.name)))
+ return &vdd_info[i].voltdm;
+ }
+
+ return ERR_PTR(-EINVAL);
+}
+
+/**
+ * omap_voltage_late_init() - Init the various voltage parameters
+ *
+ * This API is to be called in the later stages of the
+ * system boot to init the voltage controller and
+ * voltage processors.
+ */
+int __init omap_voltage_late_init(void)
+{
+ int i;
+
+ if (!vdd_info) {
+ pr_err("%s: Voltage driver support not added\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ voltage_dir = debugfs_create_dir("voltage", NULL);
+ if (IS_ERR(voltage_dir))
+ pr_err("%s: Unable to create voltage debugfs main dir\n",
+ __func__);
+ for (i = 0; i < nr_scalable_vdd; i++) {
+ if (vdd_data_configure(&vdd_info[i]))
+ continue;
+ vc_init(&vdd_info[i]);
+ vp_init(&vdd_info[i]);
+ vdd_debugfs_init(&vdd_info[i]);
+ }
+
+ return 0;
+}
+
+/**
+ * omap_voltage_early_init()- Volatage driver early init
+ */
+static int __init omap_voltage_early_init(void)
+{
+ if (cpu_is_omap34xx()) {
+ vdd_info = omap3_vdd_info;
+ nr_scalable_vdd = OMAP3_NR_SCALABLE_VDD;
+ vc_init = omap3_vc_init;
+ vdd_data_configure = omap3_vdd_data_configure;
+ } else if (cpu_is_omap44xx()) {
+ vdd_info = omap4_vdd_info;
+ nr_scalable_vdd = OMAP4_NR_SCALABLE_VDD;
+ vc_init = omap4_vc_init;
+ vdd_data_configure = omap4_vdd_data_configure;
+ } else {
+ pr_warning("%s: voltage driver support not added\n", __func__);
+ }
+
+ return 0;
+}
+core_initcall(omap_voltage_early_init);
diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
index 5e63e5069e0d..11bf9f991509 100644
--- a/arch/arm/plat-omap/Kconfig
+++ b/arch/arm/plat-omap/Kconfig
@@ -35,6 +35,37 @@ config OMAP_DEBUG_LEDS
depends on OMAP_DEBUG_DEVICES
default y if LEDS_CLASS
+config OMAP_SMARTREFLEX
+ bool "SmartReflex support"
+ depends on (ARCH_OMAP3 || ARCH_OMAP4) && PM
+ help
+ Say Y if you want to enable SmartReflex.
+
+ SmartReflex can perform continuous dynamic voltage
+ scaling around the nominal operating point voltage
+ according to silicon characteristics and operating
+ conditions. Enabling SmartReflex reduces power
+ consumption.
+
+ Please note, that by default SmartReflex is only
+ initialized. To enable the automatic voltage
+ compensation for vdd mpu and vdd core from user space,
+ user must write 1 to
+ /debug/voltage/vdd_<X>/smartreflex/autocomp,
+ where X is mpu or core for OMAP3.
+ Optionallly autocompensation can be enabled in the kernel
+ by default during system init via the enable_on_init flag
+ which an be passed as platform data to the smartreflex driver.
+
+config OMAP_SMARTREFLEX_CLASS3
+ bool "Class 3 mode of Smartreflex Implementation"
+ depends on OMAP_SMARTREFLEX && TWL4030_CORE
+ help
+ Say Y to enable Class 3 implementation of Smartreflex
+
+ Class 3 implementation of Smartreflex employs continuous hardware
+ voltage calibration.
+
config OMAP_RESET_CLOCKS
bool "Reset unused clocks during boot"
depends on ARCH_OMAP
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 2825b456da0e..b219a88cac2c 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -34,6 +34,7 @@
#include <linux/ioport.h>
#include <linux/spinlock.h>
#include <plat/cpu.h>
+#include <plat/voltage.h>
struct omap_device;
@@ -452,6 +453,8 @@ struct omap_hwmod_class {
* @main_clk: main clock: OMAP clock name
* @_clk: pointer to the main struct clk (filled in at runtime)
* @opt_clks: other device clocks that drivers can request (0..*)
+ * @vdd_name: voltage domain name
+ * @voltdm: pointer to voltage domain (filled in at runtime)
* @masters: ptr to array of OCP ifs that this hwmod can initiate on
* @slaves: ptr to array of OCP ifs that this hwmod can respond on
* @dev_attr: arbitrary device attributes that can be passed to the driver
@@ -494,6 +497,8 @@ struct omap_hwmod {
const char *main_clk;
struct clk *_clk;
struct omap_hwmod_opt_clk *opt_clks;
+ char *vdd_name;
+ struct voltagedomain *voltdm;
struct omap_hwmod_ocp_if **masters; /* connect to *_IA */
struct omap_hwmod_ocp_if **slaves; /* connect to *_TA */
void *dev_attr;
diff --git a/arch/arm/plat-omap/include/plat/smartreflex.h b/arch/arm/plat-omap/include/plat/smartreflex.h
new file mode 100644
index 000000000000..6568c885f37a
--- /dev/null
+++ b/arch/arm/plat-omap/include/plat/smartreflex.h
@@ -0,0 +1,245 @@
+/*
+ * OMAP Smartreflex Defines and Routines
+ *
+ * Author: Thara Gopinath <thara@ti.com>
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Thara Gopinath <thara@ti.com>
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ * Kalle Jokiniemi
+ *
+ * Copyright (C) 2007 Texas Instruments, Inc.
+ * Lesly A M <x0080970@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_ARM_OMAP_SMARTREFLEX_H
+#define __ASM_ARM_OMAP_SMARTREFLEX_H
+
+#include <linux/platform_device.h>
+#include <plat/voltage.h>
+
+/*
+ * Different Smartreflex IPs version. The v1 is the 65nm version used in
+ * OMAP3430. The v2 is the update for the 45nm version of the IP
+ * used in OMAP3630 and OMAP4430
+ */
+#define SR_TYPE_V1 1
+#define SR_TYPE_V2 2
+
+/* SMART REFLEX REG ADDRESS OFFSET */
+#define SRCONFIG 0x00
+#define SRSTATUS 0x04
+#define SENVAL 0x08
+#define SENMIN 0x0C
+#define SENMAX 0x10
+#define SENAVG 0x14
+#define AVGWEIGHT 0x18
+#define NVALUERECIPROCAL 0x1c
+#define SENERROR_V1 0x20
+#define ERRCONFIG_V1 0x24
+#define IRQ_EOI 0x20
+#define IRQSTATUS_RAW 0x24
+#define IRQSTATUS 0x28
+#define IRQENABLE_SET 0x2C
+#define IRQENABLE_CLR 0x30
+#define SENERROR_V2 0x34
+#define ERRCONFIG_V2 0x38
+
+/* Bit/Shift Positions */
+
+/* SRCONFIG */
+#define SRCONFIG_ACCUMDATA_SHIFT 22
+#define SRCONFIG_SRCLKLENGTH_SHIFT 12
+#define SRCONFIG_SENNENABLE_V1_SHIFT 5
+#define SRCONFIG_SENPENABLE_V1_SHIFT 3
+#define SRCONFIG_SENNENABLE_V2_SHIFT 1
+#define SRCONFIG_SENPENABLE_V2_SHIFT 0
+#define SRCONFIG_CLKCTRL_SHIFT 0
+
+#define SRCONFIG_ACCUMDATA_MASK (0x3ff << 22)
+
+#define SRCONFIG_SRENABLE BIT(11)
+#define SRCONFIG_SENENABLE BIT(10)
+#define SRCONFIG_ERRGEN_EN BIT(9)
+#define SRCONFIG_MINMAXAVG_EN BIT(8)
+#define SRCONFIG_DELAYCTRL BIT(2)
+
+/* AVGWEIGHT */
+#define AVGWEIGHT_SENPAVGWEIGHT_SHIFT 2
+#define AVGWEIGHT_SENNAVGWEIGHT_SHIFT 0
+
+/* NVALUERECIPROCAL */
+#define NVALUERECIPROCAL_SENPGAIN_SHIFT 20
+#define NVALUERECIPROCAL_SENNGAIN_SHIFT 16
+#define NVALUERECIPROCAL_RNSENP_SHIFT 8
+#define NVALUERECIPROCAL_RNSENN_SHIFT 0
+
+/* ERRCONFIG */
+#define ERRCONFIG_ERRWEIGHT_SHIFT 16
+#define ERRCONFIG_ERRMAXLIMIT_SHIFT 8
+#define ERRCONFIG_ERRMINLIMIT_SHIFT 0
+
+#define SR_ERRWEIGHT_MASK (0x07 << 16)
+#define SR_ERRMAXLIMIT_MASK (0xff << 8)
+#define SR_ERRMINLIMIT_MASK (0xff << 0)
+
+#define ERRCONFIG_VPBOUNDINTEN_V1 BIT(31)
+#define ERRCONFIG_VPBOUNDINTST_V1 BIT(30)
+#define ERRCONFIG_MCUACCUMINTEN BIT(29)
+#define ERRCONFIG_MCUACCUMINTST BIT(28)
+#define ERRCONFIG_MCUVALIDINTEN BIT(27)
+#define ERRCONFIG_MCUVALIDINTST BIT(26)
+#define ERRCONFIG_MCUBOUNDINTEN BIT(25)
+#define ERRCONFIG_MCUBOUNDINTST BIT(24)
+#define ERRCONFIG_MCUDISACKINTEN BIT(23)
+#define ERRCONFIG_VPBOUNDINTST_V2 BIT(23)
+#define ERRCONFIG_MCUDISACKINTST BIT(22)
+#define ERRCONFIG_VPBOUNDINTEN_V2 BIT(22)
+
+#define ERRCONFIG_STATUS_V1_MASK (ERRCONFIG_VPBOUNDINTST_V1 | \
+ ERRCONFIG_MCUACCUMINTST | \
+ ERRCONFIG_MCUVALIDINTST | \
+ ERRCONFIG_MCUBOUNDINTST | \
+ ERRCONFIG_MCUDISACKINTST)
+/* IRQSTATUS */
+#define IRQSTATUS_MCUACCUMINT BIT(3)
+#define IRQSTATUS_MCVALIDINT BIT(2)
+#define IRQSTATUS_MCBOUNDSINT BIT(1)
+#define IRQSTATUS_MCUDISABLEACKINT BIT(0)
+
+/* IRQENABLE_SET and IRQENABLE_CLEAR */
+#define IRQENABLE_MCUACCUMINT BIT(3)
+#define IRQENABLE_MCUVALIDINT BIT(2)
+#define IRQENABLE_MCUBOUNDSINT BIT(1)
+#define IRQENABLE_MCUDISABLEACKINT BIT(0)
+
+/* Common Bit values */
+
+#define SRCLKLENGTH_12MHZ_SYSCLK 0x3c
+#define SRCLKLENGTH_13MHZ_SYSCLK 0x41
+#define SRCLKLENGTH_19MHZ_SYSCLK 0x60
+#define SRCLKLENGTH_26MHZ_SYSCLK 0x82
+#define SRCLKLENGTH_38MHZ_SYSCLK 0xC0
+
+/*
+ * 3430 specific values. Maybe these should be passed from board file or
+ * pmic structures.
+ */
+#define OMAP3430_SR_ACCUMDATA 0x1f4
+
+#define OMAP3430_SR1_SENPAVGWEIGHT 0x03
+#define OMAP3430_SR1_SENNAVGWEIGHT 0x03
+
+#define OMAP3430_SR2_SENPAVGWEIGHT 0x01
+#define OMAP3430_SR2_SENNAVGWEIGHT 0x01
+
+#define OMAP3430_SR_ERRWEIGHT 0x04
+#define OMAP3430_SR_ERRMAXLIMIT 0x02
+
+/**
+ * struct omap_sr_pmic_data - Strucutre to be populated by pmic code to pass
+ * pmic specific info to smartreflex driver
+ *
+ * @sr_pmic_init: API to initialize smartreflex on the PMIC side.
+ */
+struct omap_sr_pmic_data {
+ void (*sr_pmic_init) (void);
+};
+
+#ifdef CONFIG_OMAP_SMARTREFLEX
+/*
+ * The smart reflex driver supports CLASS1 CLASS2 and CLASS3 SR.
+ * The smartreflex class driver should pass the class type.
+ * Should be used to populate the class_type field of the
+ * omap_smartreflex_class_data structure.
+ */
+#define SR_CLASS1 0x1
+#define SR_CLASS2 0x2
+#define SR_CLASS3 0x3
+
+/**
+ * struct omap_sr_class_data - Smartreflex class driver info
+ *
+ * @enable: API to enable a particular class smaartreflex.
+ * @disable: API to disable a particular class smartreflex.
+ * @configure: API to configure a particular class smartreflex.
+ * @notify: API to notify the class driver about an event in SR.
+ * Not needed for class3.
+ * @notify_flags: specify the events to be notified to the class driver
+ * @class_type: specify which smartreflex class.
+ * Can be used by the SR driver to take any class
+ * based decisions.
+ */
+struct omap_sr_class_data {
+ int (*enable)(struct voltagedomain *voltdm);
+ int (*disable)(struct voltagedomain *voltdm, int is_volt_reset);
+ int (*configure)(struct voltagedomain *voltdm);
+ int (*notify)(struct voltagedomain *voltdm, u32 status);
+ u8 notify_flags;
+ u8 class_type;
+};
+
+/**
+ * struct omap_sr_nvalue_table - Smartreflex n-target value info
+ *
+ * @efuse_offs: The offset of the efuse where n-target values are stored.
+ * @nvalue: The n-target value.
+ */
+struct omap_sr_nvalue_table {
+ u32 efuse_offs;
+ u32 nvalue;
+};
+
+/**
+ * struct omap_sr_data - Smartreflex platform data.
+ *
+ * @ip_type: Smartreflex IP type.
+ * @senp_mod: SENPENABLE value for the sr
+ * @senn_mod: SENNENABLE value for sr
+ * @nvalue_count: Number of distinct nvalues in the nvalue table
+ * @enable_on_init: whether this sr module needs to enabled at
+ * boot up or not.
+ * @nvalue_table: table containing the efuse offsets and nvalues
+ * corresponding to them.
+ * @voltdm: Pointer to the voltage domain associated with the SR
+ */
+struct omap_sr_data {
+ int ip_type;
+ u32 senp_mod;
+ u32 senn_mod;
+ int nvalue_count;
+ bool enable_on_init;
+ struct omap_sr_nvalue_table *nvalue_table;
+ struct voltagedomain *voltdm;
+};
+
+/* Smartreflex module enable/disable interface */
+void omap_sr_enable(struct voltagedomain *voltdm);
+void omap_sr_disable(struct voltagedomain *voltdm);
+void omap_sr_disable_reset_volt(struct voltagedomain *voltdm);
+
+/* API to register the pmic specific data with the smartreflex driver. */
+void omap_sr_register_pmic(struct omap_sr_pmic_data *pmic_data);
+
+/* Smartreflex driver hooks to be called from Smartreflex class driver */
+int sr_enable(struct voltagedomain *voltdm, unsigned long volt);
+void sr_disable(struct voltagedomain *voltdm);
+int sr_configure_errgen(struct voltagedomain *voltdm);
+int sr_configure_minmax(struct voltagedomain *voltdm);
+
+/* API to register the smartreflex class driver with the smartreflex driver */
+int sr_register_class(struct omap_sr_class_data *class_data);
+#else
+static inline void omap_sr_enable(struct voltagedomain *voltdm) {}
+static inline void omap_sr_disable(struct voltagedomain *voltdm) {}
+static inline void omap_sr_disable_reset_volt(
+ struct voltagedomain *voltdm) {}
+static inline void omap_sr_register_pmic(
+ struct omap_sr_pmic_data *pmic_data) {}
+#endif
+#endif
diff --git a/arch/arm/plat-omap/include/plat/voltage.h b/arch/arm/plat-omap/include/plat/voltage.h
new file mode 100644
index 000000000000..0ff123399f3b
--- /dev/null
+++ b/arch/arm/plat-omap/include/plat/voltage.h
@@ -0,0 +1,146 @@
+/*
+ * OMAP Voltage Management Routines
+ *
+ * Author: Thara Gopinath <thara@ti.com>
+ *
+ * Copyright (C) 2009 Texas Instruments, Inc.
+ * Thara Gopinath <thara@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
+#define __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
+
+#define VOLTSCALE_VPFORCEUPDATE 1
+#define VOLTSCALE_VCBYPASS 2
+
+/*
+ * OMAP3 GENERIC setup times. Revisit to see if these needs to be
+ * passed from board or PMIC file
+ */
+#define OMAP3_CLKSETUP 0xff
+#define OMAP3_VOLTOFFSET 0xff
+#define OMAP3_VOLTSETUP2 0xff
+
+/* Voltage value defines */
+#define OMAP3430_VDD_MPU_OPP1_UV 975000
+#define OMAP3430_VDD_MPU_OPP2_UV 1075000
+#define OMAP3430_VDD_MPU_OPP3_UV 1200000
+#define OMAP3430_VDD_MPU_OPP4_UV 1270000
+#define OMAP3430_VDD_MPU_OPP5_UV 1350000
+
+#define OMAP3430_VDD_CORE_OPP1_UV 975000
+#define OMAP3430_VDD_CORE_OPP2_UV 1050000
+#define OMAP3430_VDD_CORE_OPP3_UV 1150000
+
+#define OMAP3630_VDD_MPU_OPP50_UV 1012500
+#define OMAP3630_VDD_MPU_OPP100_UV 1200000
+#define OMAP3630_VDD_MPU_OPP120_UV 1325000
+#define OMAP3630_VDD_MPU_OPP1G_UV 1375000
+
+#define OMAP3630_VDD_CORE_OPP50_UV 1000000
+#define OMAP3630_VDD_CORE_OPP100_UV 1200000
+
+#define OMAP4430_VDD_MPU_OPP50_UV 930000
+#define OMAP4430_VDD_MPU_OPP100_UV 1100000
+#define OMAP4430_VDD_MPU_OPPTURBO_UV 1260000
+#define OMAP4430_VDD_MPU_OPPNITRO_UV 1350000
+
+#define OMAP4430_VDD_IVA_OPP50_UV 930000
+#define OMAP4430_VDD_IVA_OPP100_UV 1100000
+#define OMAP4430_VDD_IVA_OPPTURBO_UV 1260000
+
+#define OMAP4430_VDD_CORE_OPP50_UV 930000
+#define OMAP4430_VDD_CORE_OPP100_UV 1100000
+
+/**
+ * struct voltagedomain - omap voltage domain global structure.
+ * @name: Name of the voltage domain which can be used as a unique
+ * identifier.
+ */
+struct voltagedomain {
+ char *name;
+};
+
+/* API to get the voltagedomain pointer */
+struct voltagedomain *omap_voltage_domain_lookup(char *name);
+
+/**
+ * struct omap_volt_data - Omap voltage specific data.
+ * @voltage_nominal: The possible voltage value in uV
+ * @sr_efuse_offs: The offset of the efuse register(from system
+ * control module base address) from where to read
+ * the n-target value for the smartreflex module.
+ * @sr_errminlimit: Error min limit value for smartreflex. This value
+ * differs at differnet opp and thus is linked
+ * with voltage.
+ * @vp_errorgain: Error gain value for the voltage processor. This
+ * field also differs according to the voltage/opp.
+ */
+struct omap_volt_data {
+ u32 volt_nominal;
+ u32 sr_efuse_offs;
+ u8 sr_errminlimit;
+ u8 vp_errgain;
+};
+
+/**
+ * struct omap_volt_pmic_info - PMIC specific data required by voltage driver.
+ * @slew_rate: PMIC slew rate (in uv/us)
+ * @step_size: PMIC voltage step size (in uv)
+ * @vsel_to_uv: PMIC API to convert vsel value to actual voltage in uV.
+ * @uv_to_vsel: PMIC API to convert voltage in uV to vsel value.
+ */
+struct omap_volt_pmic_info {
+ int slew_rate;
+ int step_size;
+ u32 on_volt;
+ u32 onlp_volt;
+ u32 ret_volt;
+ u32 off_volt;
+ u16 volt_setup_time;
+ u8 vp_erroroffset;
+ u8 vp_vstepmin;
+ u8 vp_vstepmax;
+ u8 vp_vddmin;
+ u8 vp_vddmax;
+ u8 vp_timeout_us;
+ u8 i2c_slave_addr;
+ u8 pmic_reg;
+ unsigned long (*vsel_to_uv) (const u8 vsel);
+ u8 (*uv_to_vsel) (unsigned long uV);
+};
+
+unsigned long omap_vp_get_curr_volt(struct voltagedomain *voltdm);
+void omap_vp_enable(struct voltagedomain *voltdm);
+void omap_vp_disable(struct voltagedomain *voltdm);
+int omap_voltage_scale_vdd(struct voltagedomain *voltdm,
+ unsigned long target_volt);
+void omap_voltage_reset(struct voltagedomain *voltdm);
+void omap_voltage_get_volttable(struct voltagedomain *voltdm,
+ struct omap_volt_data **volt_data);
+struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
+ unsigned long volt);
+unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm);
+struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm);
+#ifdef CONFIG_PM
+int omap_voltage_register_pmic(struct voltagedomain *voltdm,
+ struct omap_volt_pmic_info *pmic_info);
+void omap_change_voltscale_method(struct voltagedomain *voltdm,
+ int voltscale_method);
+int omap_voltage_late_init(void);
+#else
+static inline int omap_voltage_register_pmic(struct voltagedomain *voltdm,
+ struct omap_volt_pmic_info *pmic_info) {}
+static inline void omap_change_voltscale_method(struct voltagedomain *voltdm,
+ int voltscale_method) {}
+static inline int omap_voltage_late_init(void)
+{
+ return -EINVAL;
+}
+#endif
+
+#endif