linux-kernel - Re: [PATCH v2 1/3] dt-bindings: power: Add ZynqMP power domain bindings

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Date:   Mon, 20 Aug 2018 14:46:28 -0500
From:   Rob Herring <robh@...nel.org>
To:     Jolly Shah <jolly.shah@...inx.com>
Cc:     matthias.bgg@...il.com, andy.gross@...aro.org, shawnguo@...nel.org,
        geert+renesas@...der.be, bjorn.andersson@...aro.org,
        sean.wang@...iatek.com, m.szyprowski@...sung.com,
        michal.simek@...inx.com, mark.rutland@....com, rajanv@...inx.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Rajan Vaja <rajan.vaja@...inx.com>,
        Jolly Shah <jollys@...inx.com>
Subject: Re: [PATCH v2 1/3] dt-bindings: power: Add ZynqMP power domain
 bindings

On Thu, Aug 16, 2018 at 12:21:42PM -0700, Jolly Shah wrote:
> From: Rajan Vaja <rajan.vaja@...inx.com>
> 
> Add documentation to describe ZynqMP power domain bindings.
> 
> Signed-off-by: Rajan Vaja <rajan.vaja@...inx.com>
> Signed-off-by: Jolly Shah <jollys@...inx.com>
> ---
>  .../firmware/xilinx/xlnx,zynqmp-firmware.txt       | 47 ++++++++++++++++++++++

This should be with all the other power domain bindings.

>  1 file changed, 47 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware.txt b/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware.txt
> index d215d15..5fa10a0 100644
> --- a/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware.txt
> +++ b/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware.txt
> @@ -64,6 +64,29 @@ Output clocks are registered based on clock information received
>  from firmware. Output clocks indexes are mentioned in
>  include/dt-bindings/clock/xlnx,zynqmp-clk.h.
>  
> +-----------------------------------------------------------
> +Device Tree Bindings for the Xilinx Zynq MPSoC PM domains
> +-----------------------------------------------------------
> +The binding for zynqmp-power-controller follow the common
> +generic PM domain binding[1].
> +
> +[1] Documentation/devicetree/bindings/power/power_domain.txt
> +
> +== Zynq MPSoC Generic PM Domain Node ==
> +
> +Required properties:
> + - compatible:	Must be: "xlnx,zynqmp-power-controller"
> +
> +This node contains a number of subnodes, each representing a single PM domain
> +that PM domain consumer devices reference.
> +
> +== PM Domain Nodes ==
> +
> +Required properties:
> + - #power-domain-cells:	Number of cells in a PM domain specifier. Must be 0.
> + - pd-id:		Domain identifier as defined by platform firmware.
> +			This identifier is passed to the PM firmware.

Make this a cell for the power domain consumer.

> +
>  -------
>  Example
>  -------
> @@ -78,5 +101,29 @@ firmware {
>  			clocks = <&pss_ref_clk>, <&video_clk>, <&pss_alt_ref_clk>, <&aux_ref_clk>, <&gt_crx_ref_clk>;
>  			clock-names = "pss_ref_clk", "video_clk", "pss_alt_ref_clk","aux_ref_clk", "gt_crx_ref_clk";
>  		};
> +		zynqmp-power-controller {
> +			compatible = "xlnx,zynqmp-power-controller";
> +
> +			pd_usb0: pd-usb0 {
> +				pd-id = <22>;
> +				#power-domain-cells = <0>;
> +			};
> +
> +			pd_sata: pd-sata {
> +				pd-id = <28>;
> +				#power-domain-cells = <0>;
> +			};
> +
> +			pd_gpu : pd-gpu {
> +				pd-id = <58 20 21>;
> +				#power-domain-cells = <0>;
> +			};
> +		};
>  	};
>  };
> +
> +sata0: ahci@...A_AHCI_HBA {

Don't use defines in unit-addresses (or reg for that matter). It's 
pointless indirection.

> +	...
> +	power-domains = <&pd_sata>;
> +	...
> +};
> -- 
> 2.7.4
>