linux-kernel - Re: [PATCH V2 1/4] gpio: sprd: In the sleep state, the eic debounce clk must be forced open

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Date: Tue, 2 Jan 2024 16:42:02 +0800
From: wenhua lin <wenhua.lin1994@...il.com>
To: Baolin Wang <baolin.wang@...ux.alibaba.com>
Cc: Wenhua Lin <Wenhua.Lin@...soc.com>, Linus Walleij <linus.walleij@...aro.org>, 
	Andy Shevchenko <andy@...nel.org>, Bartosz Golaszewski <brgl@...ev.pl>, Orson Zhai <orsonzhai@...il.com>, 
	Chunyan Zhang <zhang.lyra@...il.com>, linux-gpio@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Xiongpeng Wu <xiongpeng.wu@...soc.com>
Subject: Re: [PATCH V2 1/4] gpio: sprd: In the sleep state, the eic debounce
 clk must be forced open

On Wed, Sep 27, 2023 at 5:08 PM Baolin Wang
<baolin.wang@...ux.alibaba.com> wrote:
>
>
>
> On 9/21/2023 5:00 PM, Wenhua Lin wrote:
> > In the sleep state, Eic debounce has no clock and the clk of
> > debounce needs to be forced open, so that eic can wake up normally.
> >
> > Fixes: 2788938b7946 ("gpio: eic-sprd: Make the irqchip immutable")
>
> Are you sure this is the right Fixes tag? This commit did not change EIC
> debounce logics.
>
> The changes look good to me.

This modification turns on the debounce clock, and we will modify the
submission
description on patch v3. Thank you for your review.

>
> > 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 84352a6f4973..bfa8a4c7515a 100644
> > --- a/drivers/gpio/gpio-eic-sprd.c
> > +++ b/drivers/gpio/gpio-eic-sprd.c
> > @@ -23,6 +23,7 @@
> >   #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
> > @@ -214,6 +215,7 @@ 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;