Re: [PATCH 1/2] ARM: rockchip: decrease the wait time for resume

Heiko Stuebner
2015-03-02T20:47:50Z

Am Montag, 9. Februar 2015, 21:12:22 schrieb Chris Zhong:
> The delay time for wait the 24MHz OSC stabilization is 750ms, and the
> delay time for wait the external PMU stabilization is 750ms too, let's
> decrease them to 30ms.

just to understand whats happening here:

The default delay time for wait the 24MHz OSC and PMU stabilization is 750ms,
= reset value in the register and your patch is decreasing this to 30ms.

Are the new 30ms for each of the two long enough in all cases?

Heiko

>
> Signed-off-by: Chris Zhong <zyw@rock-chips.com>
> ---
>
> arch/arm/mach-rockchip/pm.c | 3 +++
> arch/arm/mach-rockchip/pm.h | 4 ++++
> 2 files changed, 7 insertions(+)
>
> diff --git a/arch/arm/mach-rockchip/pm.c b/arch/arm/mach-rockchip/pm.c
> index 50cb781..a3ab397 100644
> --- a/arch/arm/mach-rockchip/pm.c
> +++ b/arch/arm/mach-rockchip/pm.c
> @@ -209,6 +209,9 @@ static int rk3288_suspend_init(struct device_node *np)
> memcpy(rk3288_bootram_base, rockchip_slp_cpu_resume,
> rk3288_bootram_sz);
>
> + regmap_write(pmu_regmap, RK3288_PMU_OSC_CNT, OSC_STABL_CNT_THRESH);
> + regmap_write(pmu_regmap, RK3288_PMU_STABL_CNT, PMU_STABL_CNT_THRESH);
> +
> return 0;
> }
>
> diff --git a/arch/arm/mach-rockchip/pm.h b/arch/arm/mach-rockchip/pm.h
> index 7d752ff..96beaa0 100644
> --- a/arch/arm/mach-rockchip/pm.h
> +++ b/arch/arm/mach-rockchip/pm.h
> @@ -57,6 +57,10 @@ void __init rockchip_suspend_init(void);
> /* PMU_WAKEUP_CFG1 bits */
> #define PMU_ARMINT_WAKEUP_EN BIT(0)
>
> +/* wait 30ms for OSC stable and 30ms for pmic stable */
> +#define OSC_STABL_CNT_THRESH (32 * 30)
> +#define PMU_STABL_CNT_THRESH (32 * 30)
> +
> enum rk3288_pwr_mode_con {
> PMU_PWR_MODE_EN = 0,
> PMU_CLK_CORE_SRC_GATE_EN,