linux-kernel - Re: [PATCH 2/2] Add sata version of the quartz64-a board

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Date:   Fri, 16 Sep 2022 15:12:10 +0200
From:   Heiko Stuebner <heiko@...ech.de>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Alessandro Carminati <alessandro.carminati@...il.com>
Subject: Re: [PATCH 2/2] Add sata version of the quartz64-a board

Hi Alessandro,

Am Freitag, 16. September 2022, 14:53:27 CEST schrieb Alessandro Carminati:
> The Quartz64 board is built upon Rockchip RK3566.
> Rockchip RK3566 has two combo phys.
> The first connects USB3 and SATA ctrl1, and the second PCIe lane and SATA
> ctrl2.
> The second combo phy is hardwired to the PCIe slot, where for the first,
> the hardware on the board provides both the USB3 connector and the SATA
> connector.
> This DT allows the users to switch the combo phy to the SATA connector.
> 
> Signed-off-by: Alessandro Carminati <alessandro.carminati@...il.com>

I'm not really sure what the best way to do this is.

For one, this is mainly a configuration thing, so I was more thinking
about a devicetree-overlay as the right thing to use.

On the other hand this is touches essential a device you may want to
boot from. Though an initramfs may be able to solve this.

So I'm really not sure - maybe the dt-maintainers can provide some
direction :-)


Some more general stuff below (and here):

Please always use prefixes in your patch subject matching
the subsystem - can be found by just using "git log" on the directory.

Here it would be "arm64: dts: rockchip: foo"

> ---
>  arch/arm64/boot/dts/rockchip/Makefile                   | 1 +
>  arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.sata.dts | 9 +++++++++
>  2 files changed, 10 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.sata.dts
> 
> diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
> index 97ec6c156346..5c82881a92d3 100644
> --- a/arch/arm64/boot/dts/rockchip/Makefile
> +++ b/arch/arm64/boot/dts/rockchip/Makefile
> @@ -60,6 +60,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399pro-rock-pi-n10.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-pinenote-v1.1.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-pinenote-v1.2.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-quartz64-a.usb3.dtb
> +dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-quartz64-a.sata.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-quartz64-b.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-roc-pc.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-soquartz-cm4.dtb
> diff --git a/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.sata.dts b/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.sata.dts
> new file mode 100644
> index 000000000000..8620df7ec01e
> --- /dev/null
> +++ b/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.sata.dts
> @@ -0,0 +1,9 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +
> +/dts-v1/;
> +
> +#include "rk3566-quartz64-a.dtsi"
> +
> +&sata1 {
> +	status = "okay";
> +};

I guess you may want to disable the now unused usb controller?


Heiko