linux-kernel - Re: [PATCH] pinctrl: k210: Fix bias-pull-up

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Date:   Wed, 9 Feb 2022 13:29:05 -0500
From:   Sean Anderson <seanga2@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio@...r.kernel.org
Cc:     Damien Le Moal <damien.lemoal@....com>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [PATCH] pinctrl: k210: Fix bias-pull-up

On 2/9/22 1:28 PM, Sean Anderson wrote:
> Using bias-pull-up would actually cause the pin to have its pull-down
> enabled. Fix this.
> 
> Signed-off-by: Sean Anderson <seanga2@...il.com>
> ---
> 
>   drivers/pinctrl/pinctrl-k210.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pinctrl/pinctrl-k210.c b/drivers/pinctrl/pinctrl-k210.c
> index 49e32684dbb2..1ad61b32ec88 100644
> --- a/drivers/pinctrl/pinctrl-k210.c
> +++ b/drivers/pinctrl/pinctrl-k210.c
> @@ -527,7 +527,7 @@ static int k210_pinconf_set_param(struct pinctrl_dev *pctldev,
>   	case PIN_CONFIG_BIAS_PULL_UP:
>   		if (!arg)
>   			return -EINVAL;
> -		val |= K210_PC_PD;
> +		val |= K210_PC_PU;
>   		break;
>   	case PIN_CONFIG_DRIVE_STRENGTH:
>   		arg *= 1000;
> 

This should have

Fixes: d4c34d09ab03 ("pinctrl: Add RISC-V Canaan Kendryte K210 FPIOA driver")