linux-kernel - Re: [PATCH RFC/RFT] regulator: ab8500: Remove is_enabled from struct ab8500_regulator

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Date:	Tue, 26 Mar 2013 15:50:48 +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>,
	Mattias WALLIN <mattias.wallin@...ricsson.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RFC/RFT] regulator: ab8500: Remove is_enabled from struct ab8500_regulator_info

2013/3/26 Bengt Jönsson <bengt.g.jonsson@...ricsson.com>:
> On 03/26/2013 07:50 AM, Axel Lin wrote:
>>
>> The is_enabled flag looks not necessary at all, it also introduces some
>> issues
>> because current code updates info->is_enabled flag in error paths of
>> ab8500_regulator_enable() and ab8500_regulator_disable().
>> Thus this patch removes is_enabled from struct ab8500_regulator_info.
>>
>> This patch also removes info->is_enabled checking in
>> ab8500_regulator_set_mode(),
>> so it allows setting mode even the regulator is disabled.
>
> This patch will change the behaviour of set_mode as the ab8500 regulators
> share mode and enable in the same register bits:
> - off = 0b00
> - low power mode= 0b11
> - full powermode = 0b01
> - (HW control mode = 0b10)
>
> To keep regulator_enable/disable apart from regulator_set_mode I think this
> patch should not go in.

Thanks for the review.
I'll send a patch to avoid update is_enabled flag in error paths.

Axel
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