linux-kernel - Re: [PATCH 5/5] regulator: Support AP watchdog reset operation for s5m8767a

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Message-ID: <20120617185305.GD4267@opensource.wolfsonmicro.com>
Date:	Sun, 17 Jun 2012 19:53:05 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Sangbeom Kim <sbkim73@...sung.com>
Cc:	'Liam Girdwood' <lrg@...com>, linux-kernel@...r.kernel.org,
	sameo@...ux.intel.com, sbkim01@...il.com
Subject: Re: [PATCH 5/5] regulator: Support AP watchdog reset operation for
 s5m8767a

On Thu, Jun 14, 2012 at 09:01:39AM +0900, Sangbeom Kim wrote:

> Solution
> - Basic concept: After ap watchdog reset, GPIO configuration is changed by default value
> - S5M8767A has function of voltage control with gpio (8 levels with 3 gpios)
> - Set bootable voltage on level 0 -> can work with default gpio configuration
> - In the probing, Change voltage control level from level 0 to level 1
> - Execute normal dvfs operation on level 1
> - After watchdog reset, ap gpio is set by default value
> - PMIC operation mode is changed by ap reset (level1 -> level0)
> - AP can execute normal boot

OK, so basically what you're doing is fixing one of the GPIO selected
voltage levels so that when the AP comes out of reset it'll drive the
PMIC into a suitable level for it to boot?  That makes sense - can you
please resend with this in the changelog.

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