linux-kernel - Re: [PATCH 2/3] gpio: sprd: In the sleep state, the eic dbnc clk must be forced open

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 8 Aug 2023 17:36:05 +0800
From:   Chunyan Zhang <zhang.lyra@...il.com>
To:     Wenhua Lin <Wenhua.Lin@...soc.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Andy Shevchenko <andy@...nel.org>,
        Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        wenhua lin <wenhua.lin1994@...il.com>,
        Xiongpeng Wu <xiongpeng.wu@...soc.com>
Subject: Re: [PATCH 2/3] gpio: sprd: In the sleep state, the eic dbnc clk must
 be forced open

On Tue, 8 Aug 2023 at 11:32, Wenhua Lin <Wenhua.Lin@...soc.com> wrote:
>
> In the sleep state, Eic dbnc has no clock and the clk enable

Does "dbnc" mean "debounce"? I suggest not using abbreviation here.

> of dbnc needs to be forced open, so that eic can wake up normally.
>
> 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 0d85d9e80848..c506cfd6df8e 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
> @@ -213,6 +214,7 @@ 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
>