linux-kernel - Re: [PATCH] pinctrl: qcom: lpass lpi: use default pullup/strength values

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Message-ID: <YEF13ad1wpTzeV9i@builder.lan>
Date:   Thu, 4 Mar 2021 18:05:49 -0600
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Jonathan Marek <jonathan@...ek.ca>
Cc:     linux-arm-msm@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        "open list:PIN CONTROL SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pinctrl: qcom: lpass lpi: use default pullup/strength
 values

On Thu 04 Mar 13:48 CST 2021, Jonathan Marek wrote:

> If these fields are not set in dts, the driver will use these variables
> uninitialized to set the fields. Not only will it set garbage values for
> these fields, but it can overflow into other fields and break those.
> 
> In the current sm8250 dts, the dmic01 entries do not have a pullup setting,
> and might not work without this change.
> 

Perhaps you didn't see it, but Dan reported this a few days back. So
unless you object I would suggest that we include:

Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>


Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Regards,
Bjorn

> Fixes: 6e261d1090d6 ("pinctrl: qcom: Add sm8250 lpass lpi pinctrl driver")
> Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
> ---
>  drivers/pinctrl/qcom/pinctrl-lpass-lpi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
> index 369ee20a7ea95..2f19ab4db7208 100644
> --- a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
> +++ b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
> @@ -392,7 +392,7 @@ static int lpi_config_set(struct pinctrl_dev *pctldev, unsigned int group,
>  			  unsigned long *configs, unsigned int nconfs)
>  {
>  	struct lpi_pinctrl *pctrl = dev_get_drvdata(pctldev->dev);
> -	unsigned int param, arg, pullup, strength;
> +	unsigned int param, arg, pullup = LPI_GPIO_BIAS_DISABLE, strength = 2;
>  	bool value, output_enabled = false;
>  	const struct lpi_pingroup *g;
>  	unsigned long sval;
> -- 
> 2.26.1
>