linux-kernel - Re: [PATCH v4 11/14] regulator: max77802: Document binding for regulator operating modes

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Date:	Tue, 04 Nov 2014 11:50:29 +0100
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc:	Mark Brown <broonie@...nel.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Olof Johansson <olof@...om.net>,
	Chris Zhong <zyw@...k-chips.com>,
	Abhilash Kesavan <kesavan.abhilash@...il.com>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v4 11/14] regulator: max77802: Document binding for
 regulator operating modes

On pon, 2014-11-03 at 15:40 +0100, Javier Martinez Canillas wrote:
> Some regulators from the max77802 PMIC support to be configured in one
> of two operating mode: Output ON (normal) and Output On Low Power Mode.
> Not all regulators support these two modes and for some of them, the
> mode can be changed while the system is running in normal operation
> while others only support their mode to be changed on system suspend.
> 
> Extend the max77802 PMIC bindin by documenting the possible operating
> modes values so the regulators modes can be correctly configured.
> 
> Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
> ---
> 
> Changes in v4: None
> 
> Changes in v3:
>  - Use the standard suspend states bindings as suggested by Mark Brown.
> 
>  .../devicetree/bindings/regulator/max77802.txt     | 33 ++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/regulator/max77802.txt b/Documentation/devicetree/bindings/regulator/max77802.txt
> index 5aeaffc..1a78ec2 100644
> --- a/Documentation/devicetree/bindings/regulator/max77802.txt
> +++ b/Documentation/devicetree/bindings/regulator/max77802.txt
> @@ -25,6 +25,27 @@ with their hardware counterparts as follow. The valid names are:
>  			example: LDO1, LDO2, LDO35.
>  	-BUCKn 	:	for BUCKs, where n can lie in range 1 to 10.
>  			example: BUCK1, BUCK5, BUCK10.
> +
> +The max77802 regulator supports two different operating modes: Normal and Low
> +Power Mode. Some regulators support the modes to be changed at startup or by
> +the consumers during normal operation while others only support to change the
> +mode during system suspend. The standard regulator suspend states binding can
> +be used to configure the regulator operating mode.
> +
> +The regulators that support the standard "regulator-initial-mode" property,
> +changing their mode during normal operation are: LDOs 1, 3, 20 and 21.
> +
> +The possible values for "regulator-initial-mode" and "regulator-mode" are:
> +	1: Normal regulator voltage output mode.
> +	3: Low Power which reduces the quiescent current down to only 1uA
> +
> +The list of valid modes are defined in the dt-bindings/regulator/regulator.h
> +header and can be included by device tree source files.

The more he looked inside, the more regulator.h wasn't there.

Best regards,
Krzysztof



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