[PATCH v2] arm64: rockchip: dts: rk3328-rock-pi-e: add gpio-line-names

[Trevor Woerner]

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 at 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 */
+	"", "", "", "", "", "", "", "";
+};
-- 
2.41.0.327.gaa9166bcc0ba