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

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Date:   Thu, 10 Feb 2022 08:59:21 +0900
From:   Damien Le Moal <damien.lemoal@...nsource.wdc.com>
To:     Sean Anderson <seanga2@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio@...r.kernel.org
Cc:     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 2022/02/10 8:52, Sean Anderson wrote:
> On 2/9/22 6:34 PM, Damien Le Moal wrote:
>> On 2/10/22 03:28, 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;
>>
>> Ooops... My bad :)
> 
> (This is in U-Boot as well, so it looks like it's my bad)

I copy-pasted a bug, still my bad :)

-- 
Damien Le Moal
Western Digital Research