linux-kernel - RE: [PATCH] pinctrl: renesas: pinctrl-rzg2l: Return -EINVAL for pins which have input disabled

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Date:   Wed, 11 May 2022 09:53:48 +0000
From:   Phil Edworthy <phil.edworthy@...esas.com>
To:     Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Linus Walleij <linus.walleij@...aro.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>,
        Biju Das <biju.das.jz@...renesas.com>,
        Prabhakar <prabhakar.csengg@...il.com>,
        Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: RE: [PATCH] pinctrl: renesas: pinctrl-rzg2l: Return -EINVAL for pins
 which have input disabled

Hi Prabhakar,

On 11 May 2022 10:41 Lad Prabhakar wrote:
> Pin status reported by pinconf-pins file always reported pin status as
> "input enabled" even for pins which had input disabled. Fix this by
> returning -EINVAL for the pins which have input disabled.
> 
> Fixes: c4c4637eb57f2 ("pinctrl: renesas: Add RZ/G2L pin and gpio
> controller driver")
> Reported-by: Phil Edworthy <phil.edworthy@...esas.com>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Reviewed-by: Phil Edworthy <phil.edworthy@...esas.com>

> ---
>  drivers/pinctrl/renesas/pinctrl-rzg2l.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> index af2c739cdbaa..a63535ea47f5 100644
> --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> @@ -527,6 +527,8 @@ static int rzg2l_pinctrl_pinconf_get(struct
> pinctrl_dev *pctldev,
>  		if (!(cfg & PIN_CFG_IEN))
>  			return -EINVAL;
>  		arg = rzg2l_read_pin_config(pctrl, IEN(port_offset), bit,
> IEN_MASK);
> +		if (!arg)
> +			return -EINVAL;
>  		break;
> 
>  	case PIN_CONFIG_POWER_SOURCE: {
> --
> 2.25.1

Thanks
Phil