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SubjectRe: [PATCH v2 2/3] dt-bindings: display/bridge: Add binding for NWL mipi dsi host controller
On Fri, Aug 9, 2019 at 10:24 AM Guido Günther <agx@sigxcpu.org> wrote:
>
> The Northwest Logic MIPI DSI IP core can be found in NXPs i.MX8 SoCs.
>
> Signed-off-by: Guido Günther <agx@sigxcpu.org>
> ---
> .../bindings/display/bridge/nwl-dsi.yaml | 155 ++++++++++++++++++
> 1 file changed, 155 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml b/Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml
> new file mode 100644
> index 000000000000..5ed8bc4a4d18
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml
> @@ -0,0 +1,155 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/bridge/imx-nwl-dsi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Northwest Logic MIPI-DSI on imx SoCs
> +
> +maintainers:
> + - Guido Gúnther <agx@sigxcpu.org>
> + - Robert Chiras <robert.chiras@nxp.com>
> +
> +description: |
> + NWL MIPI-DSI host controller found on i.MX8 platforms. This is a dsi bridge for
> + the SOCs NWL MIPI-DSI host controller.
> +
> +properties:
> + compatible:
> + oneOf:
> + - items:
> + - const: fsl,imx8mq-nwl-dsi

Don't need oneOf nor items here for a single possible value:

compatible:
const: fsl,imx8mq-nwl-dsi

Or go ahead and add other compatibles because the 'if' below seems to
indicate you'll have more.

> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + clocks:
> + items:
> + - description: DSI core clock
> + - description: RX_ESC clock (used in escape mode)
> + - description: TX_ESC clock (used in escape mode)
> + - description: PHY_REF clock
> +
> + clock-names:
> + items:
> + - const: core
> + - const: rx_esc
> + - const: tx_esc
> + - const: phy_ref
> +
> + phys:
> + maxItems: 1
> + description:
> + A phandle to the phy module representing the DPHY
> +
> + phy-names:
> + items:
> + - const: dphy
> +
> + power-domains:
> + maxItems: 1
> + description:
> + A phandle to the power domain
> +
> + resets:
> + maxItems: 4
> + description:
> + A phandle to the reset controller

Sounds like 4 phandles... This should look similar to 'clocks'.

> +
> + reset-names:
> + items:
> + - const: byte
> + - const: dpi
> + - const: esc
> + - const: pclk
> +
> + mux-sel:

Needs a vendor prefix and will need a $ref to the type.

> + maxItems: 1
> + description:
> + A phandle to the MUX register set
> +
> + port:
> + type: object
> + description:
> + A input put or output port node.
> +
> + ports:
> + type: object
> + description:
> + A node containing DSI input & output port nodes with endpoint
> + definitions as documented in
> + Documentation/devicetree/bindings/graph.txt.

You need to define what port@0 and port@1 are.

> +
> +patternProperties:
> + "^panel@[0-9]+$": true
> +
> +allOf:
> + - if:
> + properties:
> + compatible:
> + contains:
> + enum:
> + - fsl,imx8mq-nwl-dsi

This conditional isn't needed until you have more than one compatible.

> + required:
> + - resets
> + - reset-names
> + - mux-sel
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - clocks
> + - clock-names
> + - phys
> + - phy-names

ports should be required.

> +
> +examples:
> + - |
> +
> + mipi_dsi: mipi_dsi@30a00000 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + compatible = "fsl,imx8mq-nwl-dsi";
> + reg = <0x30A00000 0x300>;
> + clocks = <&clk 163>, <&clk 244>, <&clk 245>, <&clk 164>;
> + clock-names = "core", "rx_esc", "tx_esc", "phy_ref";
> + interrupts = <0 34 4>;
> + power-domains = <&pgc_mipi>;
> + resets = <&src 0>, <&src 1>, <&src 2>, <&src 3>;
> + reset-names = "byte", "dpi", "esc", "pclk";
> + mux-sel = <&iomuxc_gpr>;
> + phys = <&dphy>;
> + phy-names = "dphy";
> +
> + panel@0 {
> + compatible = "...";

Needs to be a valid compatible. Also need 'reg' here or drop the unit-address.


> + port@0 {
> + panel_in: endpoint {
> + remote-endpoint = <&mipi_dsi_out>;
> + };
> + };
> + };
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> + mipi_dsi_in: endpoint {
> + remote-endpoint = <&lcdif_mipi_dsi>;
> + };
> + };
> + port@1 {
> + reg = <1>;
> + mipi_dsi_out: endpoint {
> + remote-endpoint = <&panel_in>;
> + };
> + };
> + };
> + };
> --
> 2.20.1
>

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