[PATCH mvebu-dt v3 5/7] ARM: dts: turris-omnia: add LED controller node

[Marek Behún]

Linux now has incomplete support for the LED controller on Turris Omnia:
it can set brightness and colors for each LED.

The controller can also put these LEDs into HW controlled mode, in which
the LEDs are controlled by HW: for example the WAN LED is connected via
MCU to the WAN PHY LED pin.

The driver does not support these HW controlled modes yet, and on probe
puts the LEDs into SW controlled mode.

Add node describing the LED controller, but disable it for now.

Signed-off-by: Marek Behún <kabel at kernel.org>
Cc: linux-arm-kernel at lists.infradead.org
Cc: Uwe Kleine-König <uwe at kleine-koenig.org>
Cc: Jason Cooper <jason at lakedaemon.net>
Cc: Gregory CLEMENT <gregory.clement at bootlin.com>
Cc: Andreas Färber <afaerber at suse.de>
Cc: Rob Herring <robh+dt at kernel.org>
Cc: devicetree at vger.kernel.org
---
 arch/arm/boot/dts/armada-385-turris-omnia.dts | 111 +++++++++++++++++-
 1 file changed, 110 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/armada-385-turris-omnia.dts b/arch/arm/boot/dts/armada-385-turris-omnia.dts
index f7498543c9ad..c442c5151cd4 100644
--- a/arch/arm/boot/dts/armada-385-turris-omnia.dts
+++ b/arch/arm/boot/dts/armada-385-turris-omnia.dts
@@ -12,6 +12,7 @@
 
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
 #include "armada-385.dtsi"
 
 / {
@@ -180,7 +181,115 @@ i2c at 0 {
 			reg = <0>;
 
 			/* STM32F0 command interface at address 0x2a */
-			/* leds device (in STM32F0) at address 0x2b */
+
+			led-controller at 2b {
+				compatible = "cznic,turris-omnia-leds";
+				reg = <0x2b>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				/*
+				 * LEDs are controlled by MCU (STM32F0) at
+				 * address 0x2b.
+				 *
+				 * The driver does not support HW control mode
+				 * for the LEDs yet. Disable the LEDs for now.
+				 *
+				 * Also LED functions are not stable yet:
+				 * - there are 3 LEDs connected via MCU to PCIe
+				 *   ports. One of these ports supports mSATA.
+				 *   There is no mSATA nor PCIe function.
+				 *   For now we use LED_FUNCTION_WLAN, since
+				 *   in most cases users have wifi cards in
+				 *   these slots
+				 * - there are 2 LEDs dedicated for user: A and
+				 *   B. Again there is no such function defined.
+				 *   For now we use LED_FUNCTION_INDICATOR
+				 */
+				status = "disabled";
+
+				multi-led at 0 {
+					reg = <0x0>;
+					color = <LED_COLOR_ID_RGB>;
+					function = LED_FUNCTION_INDICATOR;
+					function-enumerator = <2>;
+				};
+
+				multi-led at 1 {
+					reg = <0x1>;
+					color = <LED_COLOR_ID_RGB>;
+					function = LED_FUNCTION_INDICATOR;
+					function-enumerator = <1>;
+				};
+
+				multi-led at 2 {
+					reg = <0x2>;
+					color = <LED_COLOR_ID_RGB>;
+					function = LED_FUNCTION_WLAN;
+					function-enumerator = <3>;
+				};
+
+				multi-led at 3 {
+					reg = <0x3>;
+					color = <LED_COLOR_ID_RGB>;
+					function = LED_FUNCTION_WLAN;
+					function-enumerator = <2>;
+				};
+
+				multi-led at 4 {
+					reg = <0x4>;
+					color = <LED_COLOR_ID_RGB>;
+					function = LED_FUNCTION_WLAN;
+					function-enumerator = <1>;
+				};
+
+				multi-led at 5 {
+					reg = <0x5>;
+					color = <LED_COLOR_ID_RGB>;
+					function = LED_FUNCTION_WAN;
+				};
+
+				multi-led at 6 {
+					reg = <0x6>;
+					color = <LED_COLOR_ID_RGB>;
+					function = LED_FUNCTION_LAN;
+					function-enumerator = <4>;
+				};
+
+				multi-led at 7 {
+					reg = <0x7>;
+					color = <LED_COLOR_ID_RGB>;
+					function = LED_FUNCTION_LAN;
+					function-enumerator = <3>;
+				};
+
+				multi-led at 8 {
+					reg = <0x8>;
+					color = <LED_COLOR_ID_RGB>;
+					function = LED_FUNCTION_LAN;
+					function-enumerator = <2>;
+				};
+
+				multi-led at 9 {
+					reg = <0x9>;
+					color = <LED_COLOR_ID_RGB>;
+					function = LED_FUNCTION_LAN;
+					function-enumerator = <1>;
+				};
+
+				multi-led at a {
+					reg = <0xa>;
+					color = <LED_COLOR_ID_RGB>;
+					function = LED_FUNCTION_LAN;
+					function-enumerator = <0>;
+				};
+
+				multi-led at b {
+					reg = <0xb>;
+					color = <LED_COLOR_ID_RGB>;
+					function = LED_FUNCTION_POWER;
+				};
+			};
 
 			eeprom at 54 {
 				compatible = "atmel,24c64";
-- 
2.26.2