linux-kernel - Re: [PATCH 1/2] regulator: of: Add support for parsing regulator

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Message-id: <53964A45.3010108@samsung.com>
Date:	Tue, 10 Jun 2014 08:59:01 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Mark Brown <broonie@...nel.org>
Cc:	lgirdwood@...il.com, grant.likely@...aro.org, robh+dt@...nel.org,
	myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 1/2] regulator: of: Add support for parsing regulator_state
 for suspend state

Hi Mark,

On 06/10/2014 04:21 AM, Mark Brown wrote:
> On Mon, Jun 09, 2014 at 07:29:39PM +0900, Chanwoo Choi wrote:
> 
>> +		ret = of_property_read_u32(suspend_np, "regulator-mode", &pval);
>> +		if (!ret)
>> +			suspend_state->mode = pval;
> 
> If we're going to do that we'd need to define what modes mean in the DT
> binding - currently there's no support for modes at all because it's
> complicated to come up with sensible and meaningful generic defintions.
> 

The 'regulator-mode' of this patch means following defined constant variable
as following in include/linux/regulator/consumer.h:
#define REGULATOR_MODE_FAST		0x1
#define REGULATOR_MODE_NORMAL		0x2
#define REGULATOR_MODE_IDLE		0x4
#define REGULATOR_MODE_STANDBY		0x8

If regulator consumer would use this mode('regulator-mode),
specific regulator driver should implement rdev->desc->ops->set_suspend_mode function
to control regulator state according to 'regulator-mode' in suspend state.

Best Regards,
Chanwoo CHoi



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