[PATCH linux v1 3/3] devicetree : Add device tree info for POST card display on zaius

[Jaghathiswari Rankappagounder Natarajan]

Add clock, data and clear signal lines to control POST card display on zaius

Signed-off-by: Jaghathiswari Rankappagounder Natarajan <jaghu at google.com>
---
 .../devicetree/bindings/misc/postcard-disp.txt         | 18 ++++++++++++++++++
 arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts             |  8 ++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/misc/postcard-disp.txt

diff --git a/Documentation/devicetree/bindings/misc/postcard-disp.txt b/Documentation/devicetree/bindings/misc/postcard-disp.txt
new file mode 100644
index 0000000..164449e
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/postcard-disp.txt
@@ -0,0 +1,18 @@
+POST card display (two seven segment LEDs) connected to GPIO lines
+
+Required properties:
+- compatible : should be "postcard-display".
+- clk-gpios :  Should specify the GPIO pin connected to the Clock line on the POST card.
+- data-gpios : Should specify the GPIO pin connected to Data line on the POST card.
+- clear-gpios : Should specify the GPIO pin connected to Clear line on the POST card.
+
+Examples:
+
+#include <dt-bindings/gpio/gpio.h>
+
+postcard {
+	compatible = "postcard-display";
+	clk-gpios = <&gpio 0 GPIO_ACTIVE_LOW>;
+	data-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+	clear-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+};
diff --git a/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts b/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts
index 4c4754b..d555ff1 100644
--- a/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts
@@ -1,6 +1,7 @@
 /dts-v1/;

 #include "aspeed-g5.dtsi"
+#include <dt-bindings/gpio/aspeed-gpio.h>

 / {
 	model = "Zaius BMC";
@@ -58,6 +59,13 @@
 			};
 		};
 	};
+
+	postcard {
+		compatible = "postcard-display";
+		clk-gpios = <&gpio ASPEED_GPIO(J, 0) GPIO_ACTIVE_HIGH>;
+		data-gpios = <&gpio ASPEED_GPIO(J, 2) GPIO_ACTIVE_HIGH>;
+		clr-gpios = <&gpio ASPEED_GPIO(J, 1) GPIO_ACTIVE_HIGH>;
+	};
 };

 &uart5 {
--
2.8.0.rc3.226.g39d4020