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ARM: EXYNOS: Add generic cluster power control functions

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Add generic cluster power control functions for exynos based SoCS
for cluster power up/down and to know the cluster status.

Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Abhilash Kesavan 2014-05-16 04:23:26 +09:00 committed by Kukjin Kim
parent 664ba44301
commit 096d21c6eb
3 changed files with 39 additions and 0 deletions
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3
arch/arm/mach-exynos/common.h
View file

@ -66,5 +66,8 @@ 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);
extern void exynos_cluster_power_down(int cluster);
extern void exynos_cluster_power_up(int cluster);
extern int exynos_cluster_power_state(int cluster);
#endif /* __ARCH_ARM_MACH_EXYNOS_COMMON_H */

30
arch/arm/mach-exynos/pm.c
View file

@ -136,6 +136,36 @@ int exynos_cpu_power_state(int cpu)
S5P_CORE_LOCAL_PWR_EN);
}
/**
* exynos_cluster_power_down : power down the specified cluster
* @cluster : the cluster to power down
*/
void exynos_cluster_power_down(int cluster)
{
__raw_writel(0, EXYNOS_COMMON_CONFIGURATION(cluster));
}
/**
* exynos_cluster_power_up : power up the specified cluster
* @cluster : the cluster to power up
*/
void exynos_cluster_power_up(int cluster)
{
__raw_writel(S5P_CORE_LOCAL_PWR_EN,
EXYNOS_COMMON_CONFIGURATION(cluster));
}
/**
* exynos_cluster_power_state : returns the power state of the cluster
* @cluster : the cluster to retrieve the power state from
*
*/
int exynos_cluster_power_state(int cluster)
{
return (__raw_readl(EXYNOS_COMMON_STATUS(cluster)) &
S5P_CORE_LOCAL_PWR_EN);
}
/* For Cortex-A9 Diagnostic and Power control register */
static unsigned int save_arm_register[2];

6
arch/arm/mach-exynos/regs-pmu.h
View file

@ -111,6 +111,12 @@
#define EXYNOS_ARM_CORE_STATUS(_nr) \
(EXYNOS_ARM_CORE_CONFIGURATION(_nr) + 0x4)
#define EXYNOS_ARM_COMMON_CONFIGURATION S5P_PMUREG(0x2500)
#define EXYNOS_COMMON_CONFIGURATION(_nr) \
(EXYNOS_ARM_COMMON_CONFIGURATION + (0x80 * (_nr)))
#define EXYNOS_COMMON_STATUS(_nr) \
(EXYNOS_COMMON_CONFIGURATION(_nr) + 0x4)
#define S5P_PAD_RET_MAUDIO_OPTION S5P_PMUREG(0x3028)
#define S5P_PAD_RET_GPIO_OPTION S5P_PMUREG(0x3108)
#define S5P_PAD_RET_UART_OPTION S5P_PMUREG(0x3128)