linux-kernel - Re: [RFT][PATCH 1/3] regulator: ab8500-ext: Don't allow set idle mode if info->cfg->hwreq is set

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Date:	Tue, 16 Apr 2013 23:27:38 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Bengt Jönsson <bengt.g.jonsson@...ricsson.com>
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Lee Jones <lee.jones@...aro.org>,
	Yvan FILLION <yvan.fillion@...ricsson.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFT][PATCH 1/3] regulator: ab8500-ext: Don't allow set idle mode
 if info->cfg->hwreq is set

2013/4/16 Bengt Jönsson <bengt.g.jonsson@...ricsson.com>:
> On 04/10/2013 02:54 PM, Axel Lin wrote:
>>
>> The regulator always on with high power mode if info->cfg->hwreq is set.
>>
>> If we allow set idle mode when info->cfg->hwreq is set, get_mode() returns
>> REGULATOR_MODE_IDLE but the regulator actually is in REGULATOR_MODE_NORMAL
>> mode.
>> This patch avoid inconsistent status return by get_mode().
>>
>> Signed-off-by: Axel Lin <axel.lin@...ics.com>z
>>
>> ---
>>   drivers/regulator/ab8500-ext.c |    4 ++++
>>   1 file changed, 4 insertions(+)
>>
>> diff --git a/drivers/regulator/ab8500-ext.c
>> b/drivers/regulator/ab8500-ext.c
>> index 9aee21c..f0a1bbf 100644
>> --- a/drivers/regulator/ab8500-ext.c
>> +++ b/drivers/regulator/ab8500-ext.c
>> @@ -192,6 +192,10 @@ static int ab8500_ext_regulator_set_mode(struct
>> regulator_dev *rdev,
>>                 info->update_val = info->update_val_hp;
>>                 break;
>>         case REGULATOR_MODE_IDLE:
>> +               /* Always on with high power mode if info->cfg->hwreq is
>> set */
>> +               if (info->cfg && info->cfg->hwreq)
>> +                       return -EINVAL;
>> +
>>                 info->update_val = info->update_val_lp;
>>                 break;
>>
>
> I prefer to have info->update_val updated to reflect requested mode (in
> get_mode) instead of returning -EINVAL. This is how I interpret Mark's
> comment on the other patch ([PATCH] regulator: ab8500: Fix get_mode for
> shared mode regulators).Otherwise, the patch should work fine.

Well, I drop this path and send v2 for other patches now.

Thanks for the review,
Axel
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