linux-kernel - Re: [PATCH] gpio: omap: handle pin config bias flags

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:   Wed, 15 Jul 2020 13:09:12 +0300
From:   Grygorii Strashko <grygorii.strashko@...com>
To:     Drew Fustini <drew@...gleboard.org>,
        Tony Lindgren <tony@...mide.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Kevin Hilman <khilman@...nel.org>,
        <linux-omap@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gpio: omap: handle pin config bias flags



On 10/07/2020 01:34, Drew Fustini wrote:
> Modify omap_gpio_set_config() to handle pin config bias flags by calling
> gpiochip_generic_config().
> 
> The pin group for the gpio line must have the corresponding pinconf
> properties:
> 
> PIN_CONFIG_BIAS_PULL_UP requires "pinctrl-single,bias-pullup"
> PIN_CONFIG_BIAS_PULL_DOWN requires "pinctrl-single,bias-pulldown"
> 
> This is necessary for pcs_pinconf_set() to find the requested bias
> parameter in the PIN_MAP_TYPE_CONFIGS_GROUP pinctrl map.
> 
> Signed-off-by: Drew Fustini <drew@...gleboard.org>
> ---
>   drivers/gpio/gpio-omap.c | 21 +++++++++++++++++----
>   1 file changed, 17 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
> index b8e2ecc3eade..a471a152f318 100644
> --- a/drivers/gpio/gpio-omap.c
> +++ b/drivers/gpio/gpio-omap.c
> @@ -896,12 +896,25 @@ static int omap_gpio_set_config(struct gpio_chip *chip, unsigned offset,
>   				unsigned long config)
>   {
>   	u32 debounce;
> +	int ret;

ret =  -ENOTSUPP;

>   
> -	if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
> -		return -ENOTSUPP;
> +	if ((pinconf_to_config_param(config) == PIN_CONFIG_BIAS_DISABLE) ||
> +	    (pinconf_to_config_param(config) == PIN_CONFIG_BIAS_PULL_UP) ||
> +	    (pinconf_to_config_param(config) == PIN_CONFIG_BIAS_PULL_DOWN))
> +	{
> +		ret = gpiochip_generic_config(chip, offset, config);
> +	}
> +	else if (pinconf_to_config_param(config) == PIN_CONFIG_INPUT_DEBOUNCE)
> +	{
> +		debounce = pinconf_to_config_argument(config);
> +		ret = omap_gpio_debounce(chip, offset, debounce);
> +	}
> +	else
> +	{
> +		ret = -ENOTSUPP;
> +	}

drop above "else"?

>   
> -	debounce = pinconf_to_config_argument(config);
> -	return omap_gpio_debounce(chip, offset, debounce);
> +	return ret;
>   }
>   
>   static void omap_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
> 

Minor comment, Otherwise:
Acked-by: Grygorii Strashko <grygorii.strashko@...com>

-- 
Best regards,
grygorii