linux-kernel - Re: [PATCH v4 1/2] mfd: dt-bindings: add the description about dvs gpio for rk808

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Date:	Thu, 23 Jul 2015 15:49:15 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Chris Zhong <zyw@...k-chips.com>
Cc:	broonie@...nel.org, heiko@...ech.de, dianders@...omium.org,
	linux-rockchip@...ts.infradead.org, sonnyrao@...omium.org,
	amstan@...gle.com, mark.rutland@....com,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Zhang Qing <zhangqing@...k-chips.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/2] mfd: dt-bindings: add the description about dvs
 gpio for rk808

On Mon, 20 Jul 2015, Chris Zhong wrote:

> add the description about dvs1, dvs2, and add the example.
> 
> Signed-off-by: Chris Zhong <zyw@...k-chips.com>
> Reviewed-by: Doug Anderson <dianders@...omium.org>
> 
> ---
> 
> Changes in v4:
> - Remove the description about dvs-ok
> 
> Changes in v3:
> - Modify the syntax error
> 
> Changes in v2:
> - increase description about dvs pins
> 
>  Documentation/devicetree/bindings/mfd/rk808.txt | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)

Applied, thanks.

> diff --git a/Documentation/devicetree/bindings/mfd/rk808.txt b/Documentation/devicetree/bindings/mfd/rk808.txt
> index 9e6e259..4ca6aab 100644
> --- a/Documentation/devicetree/bindings/mfd/rk808.txt
> +++ b/Documentation/devicetree/bindings/mfd/rk808.txt
> @@ -24,6 +24,10 @@ Optional properties:
>  - vcc10-supply: The input supply for LDO_REG6
>  - vcc11-supply: The input supply for LDO_REG8
>  - vcc12-supply: The input supply for SWITCH_REG2
> +- dvs-gpios:  buck1/2 can be controlled by gpio dvs, this is GPIO specifiers
> +  for 2 host gpio's used for dvs. The format of the gpio specifier depends in
> +  the gpio controller. If DVS GPIOs aren't present, voltage changes will happen
> +  very quickly with no slow ramp time.
>  
>  Regulators: All the regulators of RK808 to be instantiated shall be
>  listed in a child node named 'regulators'. Each regulator is represented
> @@ -55,7 +59,9 @@ Example:
>  		interrupt-parent = <&gpio0>;
>  		interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
>  		pinctrl-names = "default";
> -		pinctrl-0 = <&pmic_int>;
> +		pinctrl-0 = <&pmic_int &dvs_1 &dvs_2>;
> +		dvs-gpios = <&gpio7 11 GPIO_ACTIVE_HIGH>,
> +			    <&gpio7 15 GPIO_ACTIVE_HIGH>;
>  		reg = <0x1b>;
>  		rockchip,system-power-controller;
>  		wakeup-source;

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