linux-kernel - Re: [PATCH V3 1/4] gpio: eic-sprd: Keep the clock rtc

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Date: Fri, 5 Jan 2024 11:25:32 +0800
From: Chunyan Zhang <zhang.lyra@...il.com>
To: Wenhua Lin <Wenhua.Lin@...soc.com>
Cc: Linus Walleij <linus.walleij@...aro.org>, Andy Shevchenko <andy@...nel.org>, 
	Bartosz Golaszewski <brgl@...ev.pl>, Orson Zhai <orsonzhai@...il.com>, 
	Baolin Wang <baolin.wang@...ux.alibaba.com>, linux-gpio@...r.kernel.org, 
	linux-kernel@...r.kernel.org, wenhua lin <wenhua.lin1994@...il.com>, 
	Xiongpeng Wu <xiongpeng.wu@...soc.com>
Subject: Re: [PATCH V3 1/4] gpio: eic-sprd: Keep the clock rtc_1k on

On Thu, 4 Jan 2024 at 10:43, Wenhua Lin <Wenhua.Lin@...soc.com> wrote:
>
> The eic debounce does not have a clock of rtc_1k in the sleep state,
> but the eic debounce will be used to wake up the system, therefore the
> clock of rtc_1k needs to be kept open.

It seems that this issue is not in the latest SoCs. I would suggest
not changing for the time being.

Thanks,
Chunyan


>
> Signed-off-by: Wenhua Lin <Wenhua.Lin@...soc.com>
> ---
>  drivers/gpio/gpio-eic-sprd.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
> index be7f2fa5aa7b..bdcb3510a208 100644
> --- a/drivers/gpio/gpio-eic-sprd.c
> +++ b/drivers/gpio/gpio-eic-sprd.c
> @@ -24,6 +24,7 @@
>  #define SPRD_EIC_DBNC_IC               0x24
>  #define SPRD_EIC_DBNC_TRIG             0x28
>  #define SPRD_EIC_DBNC_CTRL0            0x40
> +#define SPRD_EIC_DBNC_FORCE_CLK                0x8000
>
>  #define SPRD_EIC_LATCH_INTEN           0x0
>  #define SPRD_EIC_LATCH_INTRAW          0x4
> @@ -223,6 +224,7 @@ static int sprd_eic_set_debounce(struct gpio_chip *chip, unsigned int offset,
>         u32 value = readl_relaxed(base + reg) & ~SPRD_EIC_DBNC_MASK;
>
>         value |= (debounce / 1000) & SPRD_EIC_DBNC_MASK;
> +       value |= SPRD_EIC_DBNC_FORCE_CLK;
>         writel_relaxed(value, base + reg);
>
>         return 0;
> --
> 2.17.1
>