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Date:   Thu, 14 Dec 2023 08:07:48 +0100
From:   Dragan Simic <dsimic@manjaro.org>
To:     Trevor Woerner <twoerner@gmail.com>
Cc:     linux-kernel@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Heiko Stuebner <heiko@sntech.de>, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-rockchip@lists.infradead.org
Subject: Re: [PATCH v2] arm64: rockchip: dts: rk3328-rock-pi-e: add
 gpio-line-names
In-Reply-To: <20231213160556.14424-1-twoerner@gmail.com>
References: <20231213160556.14424-1-twoerner@gmail.com>
Message-ID: <62a0261fba6aecf5b28c4c55eb38ea51@manjaro.org>
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On 2023-12-13 17:05, Trevor Woerner wrote:
> Add names to the pins of the general-purpose expansion header as given
> in the Radxa GPIO page[1] following the conventions in the kernel
> documentation[2] to make it easier for users to correlate the pins with
> functions when using utilities such as 'gpioinfo'.
> 
> Signed-off-by: Trevor Woerner <twoerner@gmail.com>
> ---
> changes in v2:
> - fix subject from "amd64..." to "arm64..."
> ---
>  .../boot/dts/rockchip/rk3328-rock-pi-e.dts    | 53 +++++++++++++++++++
>  1 file changed, 53 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3328-rock-pi-e.dts
> b/arch/arm64/boot/dts/rockchip/rk3328-rock-pi-e.dts
> index 018a3a5075c7..3169c0854061 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3328-rock-pi-e.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3328-rock-pi-e.dts
> @@ -388,3 +388,56 @@ &usbdrd3 {
>  &usb_host0_ehci {
>  	status = "okay";
>  };
> +
> +&gpio0 {
> +	gpio-line-names =
> +	/* GPIO0_A0 - A7 */
> +	"", "", "", "", "", "", "", "",
> +	/* GPIO0_B0 - B7 */
> +	"", "", "", "", "", "", "", "",
> +	/* GPIO0_C0 - C7 */
> +	"", "", "", "", "", "", "", "",
> +	/* GPIO0_D0 - D7 */
> +	"", "", "", "pin-15 [GPIO0_D3]", "", "", "", "";
> +};
> +
> +&gpio1 {
> +	gpio-line-names =
> +	/* GPIO1_A0 - A7 */
> +	"", "", "", "", "", "", "", "",
> +	/* GPIO1_B0 - B7 */
> +	"", "", "", "", "", "", "", "",
> +	/* GPIO1_C0 - C7 */
> +	"", "", "", "", "", "", "", "",
> +	/* GPIO1_D0 - D7 */
> +	"", "", "", "", "pin-07 [GPIO1_D4]", "", "", "";
> +};
> +
> +&gpio2 {
> +	gpio-line-names =
> +	/* GPIO2_A0 - A7 */
> +	"pin-08 [GPIO2_A0]", "pin-10 [GPIO2_A1]", "pin-11 [GPIO2_A2]",
> +	"pin-13 [GPIO2-A3]", "pin-27 [GPIO2_A4]", "pin-28 [GPIO2_A5]",
> +	"pin-33 [GPIO2_A6]", "",
> +	/* GPIO2_B0 - B7 */
> +	"", "", "", "", "pin-26 [GPIO2_B4]", "", "", "pin-36 [GPIO2_B7]",
> +	/* GPIO2_C0 - C7 */
> +	"pin-32 [GPIO2_C0]", "pin-35 [GPIO2_C1]", "pin-12 [GPIO2_C2]",
> +	"pin-38 [GPIO2_C3]", "pin-29 [GPIO2_C4]", "pin-31 [GPIO2_C5]",
> +	"pin-37 [GPIO2_C6]", "pin-40 [GPIO2_C7]",
> +	/* GPIO2_D0 - D7 */
> +	"", "", "", "", "", "", "", "";
> +};
> +
> +&gpio3 {
> +	gpio-line-names =
> +	/* GPIO3_A0 - A7 */
> +	"pin-23 [GPIO3_A0]", "pin-19 [GPIO3_A1]", "pin-21 [GPIO3_A2]",
> +	"", "pin-03 [GPIO3_A4]", "", "pin-05 [GPIO3_A6]", "",
> +	/* GPIO3_B0 - B7 */
> +	"pin-24 [GPIO3_B0]", "", "", "", "", "", "", "",
> +	/* GPIO3_C0 - C7 */
> +	"", "", "", "", "", "", "", "",
> +	/* GPIO3_D0 - D7 */
> +	"", "", "", "", "", "", "", "";
> +};

The formatting should be a bit different, i.e. all lines following 
"gpio-line-names =" and providing the value should be indented one tab 
position further.