linux-kernel - Re: [PATCH 1/4] Documentation: pinctrl: palmas: Add ti,palmas-powerhold-override property definition

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Date:   Thu, 10 Nov 2016 09:41:38 +0530
From:   Keerthy <j-keerthy@...com>
To:     Lee Jones <lee.jones@...aro.org>
CC:     <tony@...mide.com>, <robh+dt@...nel.org>,
        <linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
        <nm@...com>, <t-kristo@...com>
Subject: Re: [PATCH 1/4] Documentation: pinctrl: palmas: Add
 ti,palmas-powerhold-override property definition



On Wednesday 09 November 2016 09:40 PM, Lee Jones wrote:
> On Thu, 27 Oct 2016, Keerthy wrote:
>
>> GPIO7 is configured in POWERHOLD mode which has higher priority
>> over DEV_ON bit and keeps the PMIC supplies on even after the DEV_ON
>> bit is turned off. This property enables driver to over ride the
>> POWERHOLD value to GPIO7 so as to turn off the PMIC in power off
>> scenarios.
>>
>> Signed-off-by: Keerthy <j-keerthy@...com>
>> ---
>>  Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt | 9 +++++++++
>>  1 file changed, 9 insertions(+)
>
> This requires a DT Ack.

Okay.

>
>> diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt
>> index caf297b..c28d4eb8 100644
>> --- a/Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt
>> +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt
>> @@ -35,6 +35,15 @@ Optional properties:
>>  - ti,palmas-enable-dvfs2: Enable DVFS2. Configure pins for DVFS2 mode.
>>  	Selection primary or secondary function associated to GPADC_START
>>  	and SYSEN2 pin/pad for DVFS2 interface
>> +- ti,palmas-override-powerhold: This is applicable for PMICs for which
>> +	GPIO7 is configured in POWERHOLD mode which has higher priority
>> +	over DEV_ON bit and keeps the PMIC supplies on even after the DEV_ON
>> +	bit is turned off. This property enables driver to over ride the
>> +	POWERHOLD value to GPIO7 so as to turn off the PMIC in power off
>> +	scenarios. So for GPIO7 if ti,palmas-override-powerhold is set
>> +	then the GPIO_7 field should never be muxed to anything else.
>> +	It should be set to POWERHOLD by default and only in case of
>> +	power off scenarios the driver will over ride the mux value.
>>
>>  This binding uses the following generic properties as defined in
>>  pinctrl-bindings.txt:
>