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

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Date:   Wed, 9 Nov 2016 16:10:16 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Keerthy <j-keerthy@...com>
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 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.

> 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:

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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