linux-kernel - Re: [PATCH V6 2/4] Documentation: bindings: clk: Add bindings for i.MX BLK

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Message-ID: <20210612004550.GC29138@dragon>
Date:   Sat, 12 Jun 2021 08:45:50 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc:     robh+dt@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, p.zabel@...gutronix.de,
        l.stach@...gutronix.de, krzk@...nel.org, agx@...xcpu.org,
        marex@...x.de, andrew.smirnov@...il.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, ping.bai@....com,
        frieder.schrempf@...tron.de, aford173@...il.com, abel.vesa@....com,
        Peng Fan <peng.fan@....com>, Rob Herring <robh@...nel.org>
Subject: Re: [PATCH V6 2/4] Documentation: bindings: clk: Add bindings for
 i.MX BLK_CTL

On Sat, May 22, 2021 at 09:42:47PM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> Document the i.MX BLK_CTL with its devicetree properties.
> 
> Each BLK CTL have different power domain inputs and they have different
> names, so we are not able to list all the power domain names for each
> BLK CTL here.
> 
> For example:
> i.MX8MM dispmix BLK CTL, it has
> 	power-domains = <&pgc_dispmix>, <&pgc_mipi>;
> 	power-domain-names = "dispmix", "mipi";
> 
> vpumix BLK CTL, it has
> 	power-domains = <&vpumix_pd>, <&vpu_g1_pd>, <&vpu_g2_pd>,
> 			<&vpu_h1_pd>;
> 	power-domain-names = "vpumix", "g1", "g2", "h1";
> 
> Reviewed-by: Rob Herring <robh@...nel.org>
> Signed-off-by: Peng Fan <peng.fan@....com>

Can we be consistent in using 'dt-bindings: ...' as prefix?

Shawn

> ---
>  .../bindings/soc/imx/fsl,imx-blk-ctl.yaml     | 66 +++++++++++++++++++
>  1 file changed, 66 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..a66f11acc6b4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml
> @@ -0,0 +1,66 @@
> +# 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@....com>
> +
> +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
> +
> +  clocks:
> +    minItems: 1
> +    maxItems: 32
> +
> +required:
> +  - compatible
> +  - reg
> +  - power-domains
> +  - power-domain-names
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/imx8mm-clock.h>
> +
> +    dispmix_blk_ctl: blk-ctl@...28000 {
> +      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>;
> +    };
> -- 
> 2.30.0
>