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Diffstat (limited to 'arch/arm/mach-shmobile/setup-r8a7790.c')
-rw-r--r--arch/arm/mach-shmobile/setup-r8a7790.c111
1 files changed, 99 insertions, 12 deletions
diff --git a/arch/arm/mach-shmobile/setup-r8a7790.c b/arch/arm/mach-shmobile/setup-r8a7790.c
index 28f94752b8ff..4c96dad21195 100644
--- a/arch/arm/mach-shmobile/setup-r8a7790.c
+++ b/arch/arm/mach-shmobile/setup-r8a7790.c
@@ -19,12 +19,12 @@
*/
#include <linux/irq.h>
-#include <linux/irqchip.h>
#include <linux/kernel.h>
#include <linux/of_platform.h>
-#include <linux/serial_sci.h>
#include <linux/platform_data/gpio-rcar.h>
#include <linux/platform_data/irq-renesas-irqc.h>
+#include <linux/serial_sci.h>
+#include <linux/sh_timer.h>
#include <mach/common.h>
#include <mach/irqs.h>
#include <mach/r8a7790.h>
@@ -149,6 +149,36 @@ static struct resource irqc0_resources[] __initdata = {
&irqc##idx##_data, \
sizeof(struct renesas_irqc_config))
+static struct resource thermal_resources[] __initdata = {
+ DEFINE_RES_MEM(0xe61f0000, 0x14),
+ DEFINE_RES_MEM(0xe61f0100, 0x38),
+ DEFINE_RES_IRQ(gic_spi(69)),
+};
+
+#define r8a7790_register_thermal() \
+ platform_device_register_simple("rcar_thermal", -1, \
+ thermal_resources, \
+ ARRAY_SIZE(thermal_resources))
+
+static struct sh_timer_config cmt00_platform_data = {
+ .name = "CMT00",
+ .timer_bit = 0,
+ .clockevent_rating = 80,
+};
+
+static struct resource cmt00_resources[] = {
+ DEFINE_RES_MEM(0xffca0510, 0x0c),
+ DEFINE_RES_MEM(0xffca0500, 0x04),
+ DEFINE_RES_IRQ(gic_spi(142)), /* CMT0_0 */
+};
+
+#define r8a7790_register_cmt(idx) \
+ platform_device_register_resndata(&platform_bus, "sh_cmt", \
+ idx, cmt##idx##_resources, \
+ ARRAY_SIZE(cmt##idx##_resources), \
+ &cmt##idx##_platform_data, \
+ sizeof(struct sh_timer_config))
+
void __init r8a7790_add_standard_devices(void)
{
r8a7790_register_scif(SCIFA0);
@@ -162,34 +192,91 @@ void __init r8a7790_add_standard_devices(void)
r8a7790_register_scif(HSCIF0);
r8a7790_register_scif(HSCIF1);
r8a7790_register_irqc(0);
+ r8a7790_register_thermal();
+ r8a7790_register_cmt(00);
}
+#define MODEMR 0xe6160060
+
+u32 __init r8a7790_read_mode_pins(void)
+{
+ void __iomem *modemr = ioremap_nocache(MODEMR, 4);
+ u32 mode;
+
+ BUG_ON(!modemr);
+ mode = ioread32(modemr);
+ iounmap(modemr);
+
+ return mode;
+}
+
+#define CNTCR 0
+#define CNTFID0 0x20
+
void __init r8a7790_timer_init(void)
{
- void __iomem *cntcr;
+#ifdef CONFIG_ARM_ARCH_TIMER
+ u32 mode = r8a7790_read_mode_pins();
+ void __iomem *base;
+ int extal_mhz = 0;
+ u32 freq;
+
+ /* At Linux boot time the r8a7790 arch timer comes up
+ * with the counter disabled. Moreover, it may also report
+ * a potentially incorrect fixed 13 MHz frequency. To be
+ * correct these registers need to be updated to use the
+ * frequency EXTAL / 2 which can be determined by the MD pins.
+ */
+
+ switch (mode & (MD(14) | MD(13))) {
+ case 0:
+ extal_mhz = 15;
+ break;
+ case MD(13):
+ extal_mhz = 20;
+ break;
+ case MD(14):
+ extal_mhz = 26;
+ break;
+ case MD(13) | MD(14):
+ extal_mhz = 30;
+ break;
+ }
- /* make sure arch timer is started by setting bit 0 of CNTCT */
- cntcr = ioremap(0xe6080000, PAGE_SIZE);
- iowrite32(1, cntcr);
- iounmap(cntcr);
+ /* The arch timer frequency equals EXTAL / 2 */
+ freq = extal_mhz * (1000000 / 2);
+
+ /* Remap "armgcnt address map" space */
+ base = ioremap(0xe6080000, PAGE_SIZE);
+
+ /* Update registers with correct frequency */
+ iowrite32(freq, base + CNTFID0);
+ asm volatile("mcr p15, 0, %0, c14, c0, 0" : : "r" (freq));
+
+ /* make sure arch timer is started by setting bit 0 of CNTCR */
+ iowrite32(1, base + CNTCR);
+ iounmap(base);
+#endif /* CONFIG_ARM_ARCH_TIMER */
shmobile_timer_init();
}
-#ifdef CONFIG_USE_OF
-void __init r8a7790_add_standard_devices_dt(void)
+void __init r8a7790_init_delay(void)
{
- of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+#ifndef CONFIG_ARM_ARCH_TIMER
+ shmobile_setup_delay(1300, 2, 4); /* Cortex-A15 @ 1300MHz */
+#endif
}
+#ifdef CONFIG_USE_OF
+
static const char *r8a7790_boards_compat_dt[] __initdata = {
"renesas,r8a7790",
NULL,
};
DT_MACHINE_START(R8A7790_DT, "Generic R8A7790 (Flattened Device Tree)")
- .init_irq = irqchip_init,
- .init_machine = r8a7790_add_standard_devices_dt,
+ .init_early = r8a7790_init_delay,
.init_time = r8a7790_timer_init,
.dt_compat = r8a7790_boards_compat_dt,
MACHINE_END