linux-kernel - Re: [PATCH 1/2] pinctrl: palmas: do not abort pin configuration for BIAS

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Message-ID: <52458876.4070205@nvidia.com>
Date:	Fri, 27 Sep 2013 19:00:30 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Stephen Warren <swarren@...dotorg.org>
CC:	"linus.walleij@...aro.org" <linus.walleij@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] pinctrl: palmas: do not abort pin configuration for
 BIAS_DEFAULT

On Thursday 26 September 2013 09:08 PM, Stephen Warren wrote:
> On 09/26/2013 06:48 AM, Laxman Dewangan wrote:
>> Recent movement of all configurations of pin in the single call of
>> pin_config_set(), it is aborting configuration if BIAS_PULL_PIN_DEFAULT
>> is selected as return of configuration.
>>
>> The original idea was to just avoid any update on register for pull up/down
>> configuration if this option is selected.
> That doesn't sound correct. If a config option is specified in DT or the
> mapping table, it should be applied to HW. If someone doesn't want a
> particular config option applied, then it simply shouldn't be mentioned
> in DT or the mapping table.
>
> IIUC, BIAS_DEFAULT should be used only on HW where there is a concept of
> a true default bias, and in that case, that is what should be applied.
>

Hmm.. When I added the PIN_DEFAULT, I just though that do not update 
anything in the register and implemented like that.
There is nothing "default" option in HW.

In this patch, I just fixed the broken stuff due to recent change.

However, it the PIN_DEFAULT is not valid option then I need to remove it 
from driver as well as from dt document of Palmas.

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