linux-kernel - Re: [PATCH v2 6/8] ARM: dts: uniphier: Add ahci controller and glue layer nodes for PXs2

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Message-Id: <a8d5db25-9191-4af0-b9e0-77fb75493a7f@www.fastmail.com>
Date:   Mon, 12 Sep 2022 10:36:48 +0200
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Kunihiko Hayashi" <hayashi.kunihiko@...ionext.com>,
        soc@...nel.org, "Olof Johansson" <olof@...om.net>
Cc:     "Rob Herring" <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        "Masami Hiramatsu" <mhiramat@...nel.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/8] ARM: dts: uniphier: Add ahci controller and glue layer
 nodes for PXs2

On Mon, Sep 12, 2022, at 9:15 AM, Kunihiko Hayashi wrote:
> Add ahci controller and glue layer nodes including reset and phy.
> This supports for PXs2 and the boards without PXs2 vodka board that
> doesn't implement any SATA connectors.
>
> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
> +		ahci: ahci@...00000 {
> +			compatible = "socionext,uniphier-pxs2-ahci",
> +				     "generic-ahci";
> +			status = "disabled";
> +			reg = <0x65600000 0x10000>;
> +			interrupts = <GIC_SPI 142 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&sys_clk 28>;
> +			resets = <&sys_rst 28>, <&ahci_rst 0>;
> +			ports-implemented = <1>;
> +			phys = <&ahci_phy>;
> +		};
> +
> +		ahci-glue@...00000 {
> +			compatible = "socionext,uniphier-pxs2-ahci-glue",
> +				     "simple-mfd";

Here as well, the "ahci-glue" name seems rather unusual for a node
name. What does it actually do, and why is this not just part of
the sata node?

> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			ranges = <0 0x65700000 0x100>;
> +
> +			ahci_rst: reset@0 {
> +				compatible = "socionext,uniphier-pxs2-ahci-reset";

I think the node name here should be "reset-controller@0".

> +
> +			ahci_phy: phy@10 {
> +				compatible = "socionext,uniphier-pxs2-ahci-phy";

and "sata-phy@10" here.

       Arnd