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authorMagnus Damm <damm@opensource.se>2011-04-29 02:39:32 +0900
committerPaul Mundt <lethal@linux-sh.org>2011-05-25 11:19:24 +0900
commit082a8ca1d3a2fbab76dba8ff66bc25c46677361d (patch)
tree93058d37fb5cba6573bd99684e1dabb6c8ca6b37 /arch/arm
parent0af4817b80870cc12f4b6f38d89f3c012a7a6b28 (diff)
downloadlinux-linaro-stable-082a8ca1d3a2fbab76dba8ff66bc25c46677361d.tar.gz
ARM: mach-shmobile: sh7372 Core Standby CPUIdle
This patch ties in the previously added sh7372 sleep mode known as Core Standby together with the shared SH-Mobile ARM CPUIdle implementation. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-shmobile/pm-sh7372.c33
1 files changed, 31 insertions, 2 deletions
diff --git a/arch/arm/mach-shmobile/pm-sh7372.c b/arch/arm/mach-shmobile/pm-sh7372.c
index 92c374d411d5..338049eed4ad 100644
--- a/arch/arm/mach-shmobile/pm-sh7372.c
+++ b/arch/arm/mach-shmobile/pm-sh7372.c
@@ -10,6 +10,7 @@
#include <linux/pm.h>
#include <linux/suspend.h>
+#include <linux/cpuidle.h>
#include <linux/module.h>
#include <linux/list.h>
#include <linux/err.h>
@@ -24,8 +25,7 @@
#define SBAR 0xe6180020
#define APARMBAREA 0xe6f10020
-#ifdef CONFIG_SUSPEND
-static void sh7372_enter_core_standby(void)
+void sh7372_enter_core_standby(void)
{
void __iomem *smfram = (void __iomem *)SMFRAM;
@@ -51,6 +51,34 @@ static void sh7372_enter_core_standby(void)
__raw_writel(0, SBAR); /* disable reset vector translation */
}
+#ifdef CONFIG_CPU_IDLE
+static void sh7372_cpuidle_setup(struct cpuidle_device *dev)
+{
+ struct cpuidle_state *state;
+ int i = dev->state_count;
+
+ state = &dev->states[i];
+ snprintf(state->name, CPUIDLE_NAME_LEN, "C2");
+ strncpy(state->desc, "Core Standby Mode", CPUIDLE_DESC_LEN);
+ state->exit_latency = 10;
+ state->target_residency = 20 + 10;
+ state->power_usage = 1; /* perhaps not */
+ state->flags = 0;
+ state->flags |= CPUIDLE_FLAG_TIME_VALID;
+ shmobile_cpuidle_modes[i] = sh7372_enter_core_standby;
+
+ dev->state_count = i + 1;
+}
+
+static void sh7372_cpuidle_init(void)
+{
+ shmobile_cpuidle_setup = sh7372_cpuidle_setup;
+}
+#else
+static void sh7372_cpuidle_init(void) {}
+#endif
+
+#ifdef CONFIG_SUSPEND
static int sh7372_enter_suspend(suspend_state_t suspend_state)
{
sh7372_enter_core_standby();
@@ -76,4 +104,5 @@ void __init sh7372_pm_init(void)
__raw_writel(0x00000000, DBGREG1);
sh7372_suspend_init();
+ sh7372_cpuidle_init();
}