linux-kernel - Re: [PATCH 1/3] dt-bindings: Add doc for the ingenic-drm driver

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Message-ID: <CAL_JsqJNBdV=bN7hnXDB=MjL1OnUnxEgC=bRzb9sCE-F_MX-zQ@mail.gmail.com>
Date:   Fri, 8 Mar 2019 18:23:43 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Mark Rutland <mark.rutland@....com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Sean Paul <sean@...rly.run>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        devicetree@...r.kernel.org, linux-mips@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] dt-bindings: Add doc for the ingenic-drm driver

On Thu, Feb 28, 2019 at 4:08 PM Paul Cercueil <paul@...pouillou.net> wrote:
>
> Add documentation for the devicetree bindings of the DRM driver for the
> JZ47xx family of SoCs from Ingenic.
>
> Signed-off-by: Paul Cercueil <paul@...pouillou.net>
> Tested-by: Artur Rojek <contact@...ur-rojek.eu>
> ---
>  .../devicetree/bindings/display/ingenic,drm.txt    | 30 ++++++++++++++++++++++
>  1 file changed, 30 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/ingenic,drm.txt
>
> diff --git a/Documentation/devicetree/bindings/display/ingenic,drm.txt b/Documentation/devicetree/bindings/display/ingenic,drm.txt
> new file mode 100644
> index 000000000000..52a368ec35cd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/ingenic,drm.txt
> @@ -0,0 +1,30 @@
> +Ingenic JZ47xx DRM driver
> +
> +Required properties:
> +- compatible: one of:
> +  * ingenic,jz4740-drm
> +  * ingenic,jz4725b-drm

DRM is a kernel thing. What's the h/w called?

> +- reg: LCD registers location and length
> +- clocks: LCD pixclock and device clock specifiers.
> +          The device clock is only required on the JZ4740.
> +- clock-names: "lcd_pclk" and "lcd"
> +- interrupts: Specifies the interrupt line the LCD controller is connected to.
> +
> +Optional properties:
> +- ingenic,panel: phandle to a display panel, if one is present

Use the graph binding or a child node. See other bindings.

> +- ingenic,lcd-mode: LCD mode to use with the display panel.
> +                   See <dt-bindings/display/ingenic,drm.h> for all the
> +                   possible values.
> +
> +Example:
> +
> +lcd: lcd-controller@...50000 {
> +       compatible = "ingenic,jz4725b-drm";
> +       reg = <0x13050000 0x1000>;
> +
> +       interrupt-parent = <&intc>;
> +       interrupts = <31>;
> +
> +       clocks = <&cgu JZ4725B_CLK_LCD>;
> +       clock-names = "lcd";
> +};
> --
> 2.11.0
>