linux-kernel - Re: [PATCH v4 2/2] leds: ktd2692: Make aux-gpios optional

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Message-ID: <f0f934b8-2e97-2b9a-76de-e1cb217fc58c@wanadoo.fr>
Date:   Fri, 8 Apr 2022 18:57:53 +0200
From:   Marion & Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Markuss Broks <markuss.broks@...il.com>,
        linux-kernel@...r.kernel.org
Cc:     phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
        Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v4 2/2] leds: ktd2692: Make aux-gpios optional


Le 08/04/2022 à 18:33, Markuss Broks a écrit :
> Make the AUX pin optional, since it isn't a core part of functionality,
> and the device is designed to be operational with only one CTRL pin.
>
> Also pick up maintenance for the LED driver and the yaml bindings.
>
> Signed-off-by: Markuss Broks <markuss.broks@...il.com>
> ---
>   MAINTAINERS                       | 6 ++++++
>   drivers/leds/flash/leds-ktd2692.c | 7 +++----
>   2 files changed, 9 insertions(+), 4 deletions(-)
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 2db49ea7ae55..8ef5667a1d98 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -10479,6 +10479,12 @@ S:	Maintained
>   F:	Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml
>   F:	drivers/video/backlight/ktd253-backlight.c
>   
> +KTD2692 FLASH LED DRIVER
> +M:	Markuss Broks <markuss.broks@...il.com>
> +S:	Maintained
> +F:	Documentation/devicetree/bindings/leds/backlight/kinetic,ktd2692.yaml
> +F:	drivers/leds/flash/leds-ktd2692.yaml
> +
>   KTEST
>   M:	Steven Rostedt <rostedt@...dmis.org>
>   M:	John Hawley <warthog9@...lescrag.net>
> diff --git a/drivers/leds/flash/leds-ktd2692.c b/drivers/leds/flash/leds-ktd2692.c
> index f341da1503a4..26edf41dfa7d 100644
> --- a/drivers/leds/flash/leds-ktd2692.c
> +++ b/drivers/leds/flash/leds-ktd2692.c
> @@ -284,10 +284,9 @@ static int ktd2692_parse_dt(struct ktd2692_context *led, struct device *dev,
>   		return ret;
>   	}
>   
> -	led->aux_gpio = devm_gpiod_get(dev, "aux", GPIOD_ASIS);
> -	ret = PTR_ERR_OR_ZERO(led->aux_gpio);
> -	if (ret) {
> -		dev_err(dev, "cannot get aux-gpios %d\n", ret);
> +	led->aux_gpio = devm_gpiod_get_optional(dev, "aux", GPIOD_ASIS);
> +	if (IS_ERR(led->aux_gpio)) {
> +		dev_err(dev, "cannot get aux-gpios: %d\n", ret);
>   		return ret;

Hi,

'ret' is known to be 0 at this point.
maybe adding:
    ret = PTR_ERR(led->aux_gpio);

?

CJ

>   	}
>