linux-kernel - Re: [PATCHv2 2/2] drm/panel: simple: Add support for Winstar WF35LTIACD

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Date:   Fri, 24 Mar 2017 10:58:21 -0500
From:   Rob Herring <robh@...nel.org>
To:     Richard Genoud <richard.genoud@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2 2/2] drm/panel: simple: Add support for Winstar
 WF35LTIACD

On Mon, Mar 20, 2017 at 02:32:22PM +0100, Richard Genoud wrote:
> This adds support for the Winstar Display Co. WF35LTIACD 3.5" QVGA TFT
> LCD panel, which can be supported by the simple panel driver.
> 
> Signed-off-by: Richard Genoud <richard.genoud@...il.com>
> ---
> 
> Changes since v1:
> Add power-supply property and an example in documentation
> 
>  .../bindings/display/panel/winstar,wf35ltiacd      | 53 ++++++++++++++++++++++
>  drivers/gpu/drm/panel/panel-simple.c               | 28 ++++++++++++
>  2 files changed, 81 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/winstar,wf35ltiacd
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/winstar,wf35ltiacd b/Documentation/devicetree/bindings/display/panel/winstar,wf35ltiacd
> new file mode 100644
> index 000000000000..9ff59b868b28
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/winstar,wf35ltiacd
> @@ -0,0 +1,53 @@
> +Winstar Display Corporation 3.5" QVGA (320x240) TFT LCD panel
> +
> +Required properties:
> +- compatible: should be "winstar,wf35ltiacd"
> +- power-supply: regulator to provide the VCC supply voltage (3.3 volts)
> +
> +This binding is compatible with the simple-panel binding, which is specified
> +in simple-panel.txt in this directory.
> +
> +Example:
> +	backlight: backlight {
> +		compatible = "pwm-backlight";
> +		pwms = <&hlcdc_pwm 0 50000 PWM_POLARITY_INVERTED>;
> +		brightness-levels = <0 31 63 95 127 159 191 223 255>;
> +		default-brightness-level = <191>;
> +		power-supply = <&bl_reg>;
> +		status = "okay";

Drop status from examples.

> +	};
> +
> +	bl_reg: backlight_regulator {
> +		compatible = "regulator-fixed";
> +		regulator-name = "backlight-power-supply";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +		status = "okay";
> +	};
> +
> +	panel: panel {
> +		compatible = "winstar,wf35ltiacd", "simple-panel";
> +		backlight = <&backlight>;
> +		power-supply = <&panel_reg>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		status = "okay";
> +
> +		port@0 {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			panel_input: endpoint@0 {
> +				reg = <0>;

You don't need reg and unit-addresses for these.

With that,

Acked-by: Rob Herring <robh@...nel.org>

> +				remote-endpoint = <&hlcdc_panel_output>;
> +			};
> +		};
> +	};
> +
> +	panel_reg: panel_regulator {
> +		compatible = "regulator-fixed";
> +		regulator-name = "panel-power-supply";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		status = "okay";
> +	};