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authorKyungmin Park <kyungmin.park@samsung.com>2009-11-17 08:41:17 +0100
committerBen Dooks <ben-linux@fluff.org>2009-12-01 01:33:15 +0000
commitc3fcf5d1a43cc27393f77d07b1323232095173de (patch)
tree544d53172edc45f2fafa20b511e2926528c2430b /arch/arm/mach-s5pc100
parentb0d5217cfb0a2357ac076977400c648cccff6154 (diff)
ARM: S5PC1XX: add cpu idle and system reset support
Add CPU idle support by a call to SoC build-in power management core. Add system reset support by a simple write to system controll register. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/mach-s5pc100')
-rw-r--r--arch/arm/mach-s5pc100/cpu.c22
-rw-r--r--arch/arm/mach-s5pc100/include/mach/system.h13
2 files changed, 32 insertions, 3 deletions
diff --git a/arch/arm/mach-s5pc100/cpu.c b/arch/arm/mach-s5pc100/cpu.c
index 0e718890da32..a23ca5795bc8 100644
--- a/arch/arm/mach-s5pc100/cpu.c
+++ b/arch/arm/mach-s5pc100/cpu.c
@@ -22,6 +22,8 @@
#include <linux/serial_core.h>
#include <linux/platform_device.h>
+#include <asm/proc-fns.h>
+
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
@@ -32,6 +34,7 @@
#include <plat/cpu-freq.h>
#include <plat/regs-serial.h>
+#include <plat/regs-power.h>
#include <plat/cpu.h>
#include <plat/devs.h>
@@ -45,6 +48,23 @@
static struct map_desc s5pc100_iodesc[] __initdata = {
};
+static void s5pc100_idle(void)
+{
+ unsigned long tmp;
+
+ tmp = __raw_readl(S5PC100_PWR_CFG);
+ tmp &= ~S5PC100_PWRCFG_CFG_DEEP_IDLE;
+ tmp &= ~S5PC100_PWRCFG_CFG_WFI_MASK;
+ tmp |= S5PC100_PWRCFG_CFG_WFI_DEEP_IDLE;
+ __raw_writel(tmp, S5PC100_PWR_CFG);
+
+ tmp = __raw_readl(S5PC100_OTHERS);
+ tmp |= S5PC100_PMU_INT_DISABLE;
+ __raw_writel(tmp, S5PC100_OTHERS);
+
+ cpu_do_idle();
+}
+
/* s5pc100_map_io
*
* register the standard cpu IO areas
@@ -93,5 +113,7 @@ int __init s5pc100_init(void)
{
printk(KERN_DEBUG "S5PC100: Initialising architecture\n");
+ s5pc1xx_idle = s5pc100_idle;
+
return sysdev_register(&s5pc100_sysdev);
}
diff --git a/arch/arm/mach-s5pc100/include/mach/system.h b/arch/arm/mach-s5pc100/include/mach/system.h
index e39014375470..f0d31a2a598c 100644
--- a/arch/arm/mach-s5pc100/include/mach/system.h
+++ b/arch/arm/mach-s5pc100/include/mach/system.h
@@ -11,14 +11,21 @@
#ifndef __ASM_ARCH_SYSTEM_H
#define __ASM_ARCH_SYSTEM_H __FILE__
+#include <linux/io.h>
+#include <mach/map.h>
+#include <plat/regs-clock.h>
+
+void (*s5pc1xx_idle)(void);
+
static void arch_idle(void)
{
- /* nothing here yet */
+ if (s5pc1xx_idle)
+ s5pc1xx_idle();
}
static void arch_reset(char mode, const char *cmd)
{
- /* nothing here yet */
+ __raw_writel(S5PC100_SWRESET_RESETVAL, S5PC100_SWRESET);
+ return;
}
-
#endif /* __ASM_ARCH_IRQ_H */