Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d3af6976 authored by Leela Krishna Amudala's avatar Leela Krishna Amudala Committed by Kukjin Kim
Browse files

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: default avatarLeela Krishna Amudala <leela.krishna@linaro.org>
Signed-off-by: default avatarAbhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent d7067f1c

arch/arm/mach-exynos/common.h

+3 −0
Original line number Diff line number Diff line
@@ -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 */

arch/arm/mach-exynos/pm.c

+36 −0
Original line number Diff line number Diff line
@@ -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];

arch/arm/mach-exynos/regs-pmu.h

+6 −0
Original line number Diff line number Diff line
@@ -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)