[PATCH] arm64: dts: marvell: espressobin: Add support for LED2

[Pali Rohár]

LED2 is connected to MPP1_2 pin. It is working only on V7 boards.
V5 boards have hw bug which cause that LED2 is non-working.

So enable LED2 only for Espressobin V7 boards.

Note that LED1 is connected to LED_WLAN# pin on miniPCIe card and LED3 to
power supply. Therefore on Espressobin board only LED2 can be controlled
directly from the host. LED1 is possible to control via WiFi card inserted
in miniPCIe slot if driver for particular card supports it.

Signed-off-by: Pali Rohár <pali@xxxxxxxxxx>
Tested-by: Gérald Kerma <gerald@xxxxxxx>

---

Previous version of this patch was sent by Uwe in March 2018, but it did
not work on any tested V5 board. Now we know it was due to V5 HW bug.

https://lore.kernel.org/linux-arm-kernel/20180321105005.18426-3-u.kleine-koenig@xxxxxxxxxxxxxx/
---
 .../dts/marvell/armada-3720-espressobin-v7-emmc.dts |  4 ++++
 .../boot/dts/marvell/armada-3720-espressobin-v7.dts |  4 ++++
 .../boot/dts/marvell/armada-3720-espressobin.dtsi   | 13 +++++++++++++
 3 files changed, 21 insertions(+)

diff --git a/arch/arm64/boot/dts/marvell/armada-3720-espressobin-v7-emmc.dts b/arch/arm64/boot/dts/marvell/armada-3720-espressobin-v7-emmc.dts
index 4775a7eda481..75401eab4d42 100644
--- a/arch/arm64/boot/dts/marvell/armada-3720-espressobin-v7-emmc.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-espressobin-v7-emmc.dts
@@ -39,3 +39,7 @@
 &sdhci0 {
 	status = "okay";
 };
+
+&led2 {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/marvell/armada-3720-espressobin-v7.dts b/arch/arm64/boot/dts/marvell/armada-3720-espressobin-v7.dts
index c47a93978386..48a7f50fb427 100644
--- a/arch/arm64/boot/dts/marvell/armada-3720-espressobin-v7.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-espressobin-v7.dts
@@ -34,3 +34,7 @@
 &switch0port3 {
 	label = "wan";
 };
+
+&led2 {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dtsi b/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dtsi
index 8a1c678bea5f..daffe136c523 100644
--- a/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dtsi
@@ -41,6 +41,19 @@
 			  3300000 0x0>;
 		enable-active-high;
 	};
+
+	led2: gpio-led2 {
+		/* led2 is working only on v7 board */
+		status = "disabled";
+
+		compatible = "gpio-leds";
+
+		led2 {
+			label = "led2";
+			gpios = <&gpionb 2 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+		};
+	};
 };
 
 /* J9 */
-- 
2.20.1