Abhilash Kesavan wrote:
>
+ Jonghwan Choi, Seungkon Hwang
> From: Leela Krishna Amudala <leela.kris...@linaro.org>
>
> 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.kris...@linaro.org>
In this case, Abhilash's signed-off-by should be added here.
> ---
> arch/arm/mach-exynos/common.h | 3 +++
> arch/arm/mach-exynos/pm.c | 36
++++++++++++++++++++++++++++++++++++
> arch/arm/mach-exynos/regs-pmu.h | 6 ++++++
> 3 files changed, 45 insertions(+)
>
> diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
> index 47cbab0..a7dbb5f 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_powerdown(int cpu);
IMO, using 'xxx_power_down' would be better.
> +extern void exynos_cpu_powerup(int cpu);
> +extern int exynos_cpu_power_state(int cpu);
Hmm...is it really 'cpu' related? Or 'core' related? As I know, when the
function is called, ARM core and L1 cache will be power_up/down except L2
cache...But I have no strong objection to use 'cpu' here
>
> #endif /* __ARCH_ARM_MACH_EXYNOS_COMMON_H */
> diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
> index 15af0ce..6651028 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_cpu_powerdown : power down the specified cpu
> + * @cpu : the cpu to power down
> + *
> + * Power downs the specified cpu. The sequence must be finished by a
> + * call to cpu_do_idle()
> + *
> + */
> +void exynos_cpu_powerdown(int cpu)
> +{
> + __raw_writel(0, EXYNOS_ARM_CORE_CONFIGURATION(cpu));
> +}
> +
> +/**
> + * exynos_cpu_powerup : power up the specified cpu
> + * @cpu : the cpu to power up
> + *
> + * Power up the specified cpu
> + */
> +void exynos_cpu_powerup(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 4f6a256..0bdfcbc 100644
> --- a/arch/arm/mach-exynos/regs-pmu.h
> +++ b/arch/arm/mach-exynos/regs-pmu.h
> @@ -121,6 +121,12 @@
>
> #define S5P_CHECK_SLEEP 0x00000BAD
>
> +#define EXYNOS_ARM_CORE0_CONFIGURATION S5P_PMUREG(0x2000)
This can be put in order of address.
> +#define EXYNOS_ARM_CORE_CONFIGURATION(_nr) \
> + (EXYNOS_ARM_CORE0_CONFIGURATION + (0x80 * (_nr)))
> +#define EXYNOS_ARM_CORE_STATUS(_nr) \
> + (EXYNOS_ARM_CORE_CONFIGURATION(_nr) + 0x4)
Can you please cleanup codes following definitions are used with using above
definitions?
S5P_ARM_CORE1_CONFIGURATION and S5P_ARM_CORE1_STATUS in hotplug.c and
platsmp.c
> +
> /* Only for EXYNOS4210 */
> #define S5P_CMU_CLKSTOP_LCD1_LOWPWR S5P_PMUREG(0x1154)
> #define S5P_CMU_RESET_LCD1_LOWPWR S5P_PMUREG(0x1174)
> --
> 1.7.9.5
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