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ARM: mach-shmobile: sh7372 Core Standby CPUIdle

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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>
This commit is contained in:
Magnus Damm 2011-04-29 02:39:32 +09:00 committed by Paul Mundt
parent 0af4817b80
commit 082a8ca1d3
1 changed files with 31 additions and 2 deletions
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33
arch/arm/mach-shmobile/pm-sh7372.c
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@ -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();
}