linux-kernel - Re: [PATCH v2 3/3] ASoC: samsung: Fix invalid argument when devm_gpiod

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Date:   Fri, 8 Sep 2017 18:46:12 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Jaechul Lee <jcsing.lee@...sung.com>
Cc:     Sangbeom Kim <sbkim73@...sung.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        galaxyra@...il.com, Chanwoo Choi <cw00.choi@...sung.com>
Subject: Re: [PATCH v2 3/3] ASoC: samsung: Fix invalid argument when
 devm_gpiod_get is called

On Wed, Sep 06, 2017 at 10:04:15AM +0900, Jaechul Lee wrote:
> devm_gpiod_get is called with GPIOF_OUT_INIT_LOW but the function doesn't
> allow the parameters. Unluckily, GPIOF_OUT_INIT_LOW is same value as
> GPIOD_ASIS and gpio direction isn't set properly.
> 
> Muted stream comes up when I try recording some sounds on TM2. mic-bias
> gpiod state can't be changed because the gpiod is created with the invalid
> parameter. The gpio should be set GPIOD_OUT_HIGH.
> 
> Fixes: 1bfbc260a5b4 ("ASoC: samsung: Add machine driver for Exynos5433 based TM2 board")
> Signed-off-by: Jaechul Lee <jcsing.lee@...sung.com>
> ---
>  sound/soc/samsung/tm2_wm5110.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 

Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>

Best regards,
Krzysztof