Re: [PATCH V2 2/4] Documentation: bindings: clk: Add bindings for i.MX BLK_CTL

[Rob Herring <robh@xxxxxxxxxx>]

On Fri, Apr 30, 2021 at 01:27:44PM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@xxxxxxx>
> 
> Document the i.MX BLK_CTL with its devicetree properties.
> 
> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
> ---
>  .../bindings/soc/imx/fsl,imx-blk-ctl.yaml     | 73 +++++++++++++++++++
>  1 file changed, 73 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml
> 
> diff --git a/Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml b/Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml
> new file mode 100644
> index 000000000000..a491b63de50c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml
> @@ -0,0 +1,73 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/soc/imx/fsl,imx-blk-ctl.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP i.MX BLK_CTL
> +
> +maintainers:
> +  - Peng Fan <peng.fan@xxxxxxx>
> +
> +description:
> +  i.MX BLK_CTL is a conglomerate of different GPRs that are
> +  dedicated to a specific subsystem. It usually contains
> +  clocks and resets amongst other things. Here we take the clocks
> +  and resets as virtual PDs, the reason we could not take it as
> +  clock provider is there is A/B lock issue between power domain
> +  and clock.
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - fsl,imx8mm-dispmix-blk-ctl
> +          - fsl,imx8mm-vpumix-blk-ctl
> +      - const: syscon
> +
> +  reg:
> +    maxItems: 1
> +
> +  "#power-domain-cells":
> +    const: 1
> +
> +  power-domains:
> +    minItems: 1
> +    maxItems: 32
> +
> +  power-domain-names:
> +    minItems: 1
> +    maxItems: 32

Please describe why there's a range and we don't enumerate each entry.

> +
> +  '#reset-cells':
> +    const: 1
> +
> +  clocks:
> +    minItems: 1
> +    maxItems: 32
> +
> +  clock-names:
> +    minItems: 1
> +    maxItems: 32
> +
> +required:
> +  - compatible
> +  - reg
> +  - power-domains
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/imx8mm-clock.h>
> +
> +    dispmix_blk_ctl: blk-ctl@32e28000 {
> +      compatible = "fsl,imx8mm-dispmix-blk-ctl", "syscon";
> +      reg = <0x32e28000 0x100>;
> +      #power-domain-cells = <1>;
> +      power-domains = <&pgc_dispmix>, <&pgc_mipi>;
> +      power-domain-names = "dispmix", "mipi";
> +      clocks = <&clk IMX8MM_CLK_DISP_ROOT>, <&clk IMX8MM_CLK_DISP_AXI_ROOT>,
> +               <&clk IMX8MM_CLK_DISP_APB_ROOT>;
> +      clock-names = "disp", "axi", "apb";
> +    };
> -- 
> 2.30.0
>