linux-kernel - Re: [PATCH v2 2/3] dt-bindings: display: panel: Convert sitronix,st7701 to DT schema

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Message-ID: <CAL_Jsq+F4cE=razpBFg=vjA8_TbPSH8pxLWO85s2Lt_=NZ063Q@mail.gmail.com>
Date:   Wed, 25 Mar 2020 13:16:29 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Jagan Teki <jagan@...rulasolutions.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Mark Rutland <mark.rutland@....com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-amarula <linux-amarula@...rulasolutions.com>
Subject: Re: [PATCH v2 2/3] dt-bindings: display: panel: Convert
 sitronix,st7701 to DT schema

On Wed, Mar 18, 2020 at 11:10 AM Jagan Teki <jagan@...rulasolutions.com> wrote:
>
> Convert the sitronix,st7701 panel bindings to DT schema.
>
> Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
> ---
> Changes for v2:
> - fix dt_binding_check
>
>  .../display/panel/sitronix,st7701.txt         | 30 --------
>  .../display/panel/sitronix,st7701.yaml        | 68 +++++++++++++++++++
>  2 files changed, 68 insertions(+), 30 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/display/panel/sitronix,st7701.txt
>  create mode 100644 Documentation/devicetree/bindings/display/panel/sitronix,st7701.yaml
>
> diff --git a/Documentation/devicetree/bindings/display/panel/sitronix,st7701.txt b/Documentation/devicetree/bindings/display/panel/sitronix,st7701.txt
> deleted file mode 100644
> index ccd17597f1f6..000000000000
> --- a/Documentation/devicetree/bindings/display/panel/sitronix,st7701.txt
> +++ /dev/null
> @@ -1,30 +0,0 @@
> -Sitronix ST7701 based LCD panels
> -
> -ST7701 designed for small and medium sizes of TFT LCD display, is
> -capable of supporting up to 480RGBX864 in resolution. It provides
> -several system interfaces like MIPI/RGB/SPI.
> -
> -Techstar TS8550B is 480x854, 2-lane MIPI DSI LCD panel which has
> -inbuilt ST7701 chip.
> -
> -Required properties:
> -- compatible: must be "sitronix,st7701" and one of
> -  * "techstar,ts8550b"
> -- reset-gpios: a GPIO phandle for the reset pin
> -
> -Required properties for techstar,ts8550b:
> -- reg: DSI virtual channel used by that screen
> -- VCC-supply: analog regulator for MIPI circuit
> -- IOVCC-supply: I/O system regulator
> -
> -Optional properties:
> -- backlight: phandle for the backlight control.
> -
> -panel@0 {
> -       compatible = "techstar,ts8550b", "sitronix,st7701";
> -       reg = <0>;
> -       VCC-supply = <&reg_dldo2>;
> -       IOVCC-supply = <&reg_dldo2>;
> -       reset-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* LCD-RST: PD24 */
> -       backlight = <&backlight>;
> -};
> diff --git a/Documentation/devicetree/bindings/display/panel/sitronix,st7701.yaml b/Documentation/devicetree/bindings/display/panel/sitronix,st7701.yaml
> new file mode 100644
> index 000000000000..e02686dfd937
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/sitronix,st7701.yaml
> @@ -0,0 +1,68 @@
> +# SPDX-License-Identifier: (GPL-2.0+ OR X11)

Do you have rights on the old doc to change the license? If so, it should be:

(GPL-2.0-only OR BSD-2-Clause)

If not, GPL-2.0-only.

> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/panel/sitronix,st7701.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sitronix ST7701 based LCD panels
> +
> +maintainers:
> +  - Jagan Teki <jagan@...rulasolutions.com>
> +
> +description: |
> +  ST7701 designed for small and medium sizes of TFT LCD display, is
> +  capable of supporting up to 480RGBX864 in resolution. It provides
> +  several system interfaces like MIPI/RGB/SPI.
> +
> +  Techstar TS8550B is 480x854, 2-lane MIPI DSI LCD panel which has
> +  inbuilt ST7701 chip.

Reference panel-common.yaml here.

> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - techstar,ts8550b
> +      - const: sitronix,st7701
> +
> +  reg:
> +    description: DSI virtual channel used by that screen

maxItems: 1

> +
> +  VCC-supply:
> +    description: analog regulator for MIPI circuit
> +
> +  IOVCC-supply:
> +    description: I/O system regulator
> +
> +  reset-gpios:
> +    description: a GPIO phandle for the reset pin

Just 'reset-gpios: true'. Already defined by panel-common.yaml.

> +
> +  backlight:
> +    description: Backlight used by the panel
> +    $ref: "/schemas/types.yaml#/definitions/phandle"

Same here. Just need 'true'.

> +
> +required:
> +  - compatible
> +  - reg
> +  - VCC-supply
> +  - IOVCC-supply
> +  - reset-gpios
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    dsi {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        panel@0 {
> +            compatible = "techstar,ts8550b", "sitronix,st7701";
> +            reg = <0>;
> +            VCC-supply = <&reg_dldo2>;
> +            IOVCC-supply = <&reg_dldo2>;
> +            reset-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* LCD-RST: PD24 */
> +            backlight = <&backlight>;
> +        };
> +    };
> --
> 2.17.1
>