diff options
| author | Leela Krishna Amudala <leela.krishna@linaro.org> | 2014-05-16 04:23:24 +0900 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2014-05-16 04:24:24 +0900 |
| commit | d3af6976a24f8cebef23e72ade6d91ddd781c12b (patch) | |
| tree | c58b18b88766f42b97c4d74440dac61cabc1664d /arch/arm | |
| parent | d7067f1c5fa0232001502569c6878d22308da268 (diff) | |
ARM: EXYNOS: Add generic cpu power control functions for exynos SoCs
Add generic cpu power control functions for exynos based
SoCS for cpu power up/down and to know the cpu status.
Signed-off-by: Leela Krishna Amudala <leela.krishna@linaro.org>
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-exynos/common.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-exynos/pm.c | 36 | ||||
| -rw-r--r-- | arch/arm/mach-exynos/regs-pmu.h | 6 |
3 files changed, 45 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h index 963c51fb606c..4d815a511bc1 100644 --- a/arch/arm/mach-exynos/common.h +++ b/arch/arm/mach-exynos/common.h @@ -63,5 +63,8 @@ struct exynos_pmu_conf { }; extern void exynos_sys_powerdown_conf(enum sys_powerdown mode); +extern void exynos_cpu_power_down(int cpu); +extern void exynos_cpu_power_up(int cpu); +extern int exynos_cpu_power_state(int cpu); #endif /* __ARCH_ARM_MACH_EXYNOS_COMMON_H */ diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c index 15af0ceb0a66..cbfe23598236 100644 --- a/arch/arm/mach-exynos/pm.c +++ b/arch/arm/mach-exynos/pm.c @@ -100,6 +100,42 @@ static int exynos_irq_set_wake(struct irq_data *data, unsigned int state) return -ENOENT; } +/** + * exynos_core_power_down : power down the specified cpu + * @cpu : the cpu to power down + * + * Power down the specified cpu. The sequence must be finished by a + * call to cpu_do_idle() + * + */ +void exynos_cpu_power_down(int cpu) +{ + __raw_writel(0, EXYNOS_ARM_CORE_CONFIGURATION(cpu)); +} + +/** + * exynos_cpu_power_up : power up the specified cpu + * @cpu : the cpu to power up + * + * Power up the specified cpu + */ +void exynos_cpu_power_up(int cpu) +{ + __raw_writel(S5P_CORE_LOCAL_PWR_EN, + EXYNOS_ARM_CORE_CONFIGURATION(cpu)); +} + +/** + * exynos_cpu_power_state : returns the power state of the cpu + * @cpu : the cpu to retrieve the power state from + * + */ +int exynos_cpu_power_state(int cpu) +{ + return (__raw_readl(EXYNOS_ARM_CORE_STATUS(cpu)) & + S5P_CORE_LOCAL_PWR_EN); +} + /* For Cortex-A9 Diagnostic and Power control register */ static unsigned int save_arm_register[2]; diff --git a/arch/arm/mach-exynos/regs-pmu.h b/arch/arm/mach-exynos/regs-pmu.h index 4f6a2560d022..84634ac5b127 100644 --- a/arch/arm/mach-exynos/regs-pmu.h +++ b/arch/arm/mach-exynos/regs-pmu.h @@ -105,6 +105,12 @@ #define S5P_GPS_LOWPWR S5P_PMUREG(0x139C) #define S5P_GPS_ALIVE_LOWPWR S5P_PMUREG(0x13A0) +#define EXYNOS_ARM_CORE0_CONFIGURATION S5P_PMUREG(0x2000) +#define EXYNOS_ARM_CORE_CONFIGURATION(_nr) \ + (EXYNOS_ARM_CORE0_CONFIGURATION + (0x80 * (_nr))) +#define EXYNOS_ARM_CORE_STATUS(_nr) \ + (EXYNOS_ARM_CORE_CONFIGURATION(_nr) + 0x4) + #define S5P_ARM_CORE1_CONFIGURATION S5P_PMUREG(0x2080) #define S5P_ARM_CORE1_STATUS S5P_PMUREG(0x2084) |