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authorTony Lindgren <tony@atomide.com>2013-05-16 19:27:49 +0400
committerTony Lindgren <tony@atomide.com>2013-05-16 19:27:49 +0400
commit49a34fd5380d249ae8a2173399c62fc5a1fddd70 (patch)
treef0247fb2116d2775c01a8a5a316195df696b7c3e /arch/arm/mach-omap2/pm44xx.c
parentf722406faae2d073cc1d01063d1123c35425939e (diff)
parent705814b5ea6ff69d4da8ad581c3da5d26d1eae83 (diff)
downloadlinux-49a34fd5380d249ae8a2173399c62fc5a1fddd70.tar.xz
Merge tag 'omap-pm-v3.10/cleanup/pm' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into omap-for-v3.11/pm
OMAP PM cleanups for v3.10
Diffstat (limited to 'arch/arm/mach-omap2/pm44xx.c')
-rw-r--r--arch/arm/mach-omap2/pm44xx.c58
1 files changed, 48 insertions, 10 deletions
diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c
index a251f87fa2a2..82f0698933d8 100644
--- a/arch/arm/mach-omap2/pm44xx.c
+++ b/arch/arm/mach-omap2/pm44xx.c
@@ -1,7 +1,7 @@
/*
- * OMAP4 Power Management Routines
+ * OMAP4+ Power Management Routines
*
- * Copyright (C) 2010-2011 Texas Instruments, Inc.
+ * Copyright (C) 2010-2013 Texas Instruments, Inc.
* Rajendra Nayak <rnayak@ti.com>
* Santosh Shilimkar <santosh.shilimkar@ti.com>
*
@@ -135,16 +135,16 @@ static void omap_default_idle(void)
}
/**
- * omap4_pm_init - Init routine for OMAP4 PM
+ * omap4_init_static_deps - Add OMAP4 static dependencies
*
- * Initializes all powerdomain and clockdomain target states
- * and all PRCM settings.
+ * Add needed static clockdomain dependencies on OMAP4 devices.
+ * Return: 0 on success or 'err' on failures
*/
-int __init omap4_pm_init(void)
+static inline int omap4_init_static_deps(void)
{
- int ret;
struct clockdomain *emif_clkdm, *mpuss_clkdm, *l3_1_clkdm;
struct clockdomain *ducati_clkdm, *l3_2_clkdm;
+ int ret = 0;
if (omap_rev() == OMAP4430_REV_ES1_0) {
WARN(1, "Power Management not supported on OMAP4430 ES1.0\n");
@@ -163,7 +163,7 @@ int __init omap4_pm_init(void)
ret = pwrdm_for_each(pwrdms_setup, NULL);
if (ret) {
pr_err("Failed to setup powerdomains\n");
- goto err2;
+ return ret;
}
/*
@@ -171,6 +171,10 @@ int __init omap4_pm_init(void)
* MPUSS -> L4_PER/L3_* and DUCATI -> L3_* doesn't work as
* expected. The hardware recommendation is to enable static
* dependencies for these to avoid system lock ups or random crashes.
+ * The L4 wakeup depedency is added to workaround the OCP sync hardware
+ * BUG with 32K synctimer which lead to incorrect timer value read
+ * from the 32K counter. The BUG applies for GPTIMER1 and WDT2 which
+ * are part of L4 wakeup clockdomain.
*/
mpuss_clkdm = clkdm_lookup("mpuss_clkdm");
emif_clkdm = clkdm_lookup("l3_emif_clkdm");
@@ -179,7 +183,7 @@ int __init omap4_pm_init(void)
ducati_clkdm = clkdm_lookup("ducati_clkdm");
if ((!mpuss_clkdm) || (!emif_clkdm) || (!l3_1_clkdm) ||
(!l3_2_clkdm) || (!ducati_clkdm))
- goto err2;
+ return -EINVAL;
ret = clkdm_add_wkdep(mpuss_clkdm, emif_clkdm);
ret |= clkdm_add_wkdep(mpuss_clkdm, l3_1_clkdm);
@@ -188,9 +192,42 @@ int __init omap4_pm_init(void)
ret |= clkdm_add_wkdep(ducati_clkdm, l3_2_clkdm);
if (ret) {
pr_err("Failed to add MPUSS -> L3/EMIF/L4PER, DUCATI -> L3 wakeup dependency\n");
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+/**
+ * omap4_pm_init - Init routine for OMAP4+ devices
+ *
+ * Initializes all powerdomain and clockdomain target states
+ * and all PRCM settings.
+ * Return: Returns the error code returned by called functions.
+ */
+int __init omap4_pm_init(void)
+{
+ int ret = 0;
+
+ if (omap_rev() == OMAP4430_REV_ES1_0) {
+ WARN(1, "Power Management not supported on OMAP4430 ES1.0\n");
+ return -ENODEV;
+ }
+
+ pr_info("Power Management for TI OMAP4+ devices.\n");
+
+ ret = pwrdm_for_each(pwrdms_setup, NULL);
+ if (ret) {
+ pr_err("Failed to setup powerdomains.\n");
goto err2;
}
+ if (cpu_is_omap44xx()) {
+ ret = omap4_init_static_deps();
+ if (ret)
+ goto err2;
+ }
+
ret = omap4_mpuss_init();
if (ret) {
pr_err("Failed to initialise OMAP4 MPUSS\n");
@@ -206,7 +243,8 @@ int __init omap4_pm_init(void)
/* Overwrite the default cpu_do_idle() */
arm_pm_idle = omap_default_idle;
- omap4_idle_init();
+ if (cpu_is_omap44xx())
+ omap4_idle_init();
err2:
return ret;