linux-kernel - Re: [PATCH v2 2/2] ASoC: codecs: wsa883x: Use proper shutdown GPIO polarity

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Date:   Fri, 11 Nov 2022 16:42:02 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Banajit Goswami <bgoswami@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] ASoC: codecs: wsa883x: Use proper shutdown GPIO
 polarity



On 10/11/2022 13:35, Krzysztof Kozlowski wrote:
> The shutdown GPIO is active low (SD_N), but this depends on actual board
> layout.  Linux drivers should only care about logical state, where high
> (1) means shutdown and low (0) means do not shutdown.
> 
> Invert the GPIO to match logical value.
> 
> Fixes: 43b8c7dc85a1 ("ASoC: codecs: add wsa883x amplifier support")
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> 
> ---

Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>

> 
> Changes since v1:
> 1. None.
> ---
>   sound/soc/codecs/wsa883x.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/soc/codecs/wsa883x.c b/sound/soc/codecs/wsa883x.c
> index c7b10bbfba7e..77a7dd3cf495 100644
> --- a/sound/soc/codecs/wsa883x.c
> +++ b/sound/soc/codecs/wsa883x.c
> @@ -1392,7 +1392,7 @@ static int wsa883x_probe(struct sdw_slave *pdev,
>   	}
>   
>   	wsa883x->sd_n = devm_gpiod_get_optional(&pdev->dev, "powerdown",
> -						GPIOD_FLAGS_BIT_NONEXCLUSIVE);
> +						GPIOD_FLAGS_BIT_NONEXCLUSIVE | GPIOD_OUT_HIGH);
>   	if (IS_ERR(wsa883x->sd_n)) {
>   		dev_err(&pdev->dev, "Shutdown Control GPIO not found\n");
>   		ret = PTR_ERR(wsa883x->sd_n);
> @@ -1411,7 +1411,7 @@ static int wsa883x_probe(struct sdw_slave *pdev,
>   	pdev->prop.simple_clk_stop_capable = true;
>   	pdev->prop.sink_dpn_prop = wsa_sink_dpn_prop;
>   	pdev->prop.scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY;
> -	gpiod_direction_output(wsa883x->sd_n, 1);
> +	gpiod_direction_output(wsa883x->sd_n, 0);
>   
>   	wsa883x->regmap = devm_regmap_init_sdw(pdev, &wsa883x_regmap_config);
>   	if (IS_ERR(wsa883x->regmap)) {