This binding provides interface for adding clock, data and clear signal GPIO
lines to control seven segment display.
Signed-off-by: Jaghathiswari Rankappagounder Natarajan <ja...@google.com>
---
.../devicetree/bindings/misc/seven-seg-gpio.txt | 27 ++++++++++++++++++++++
1 file changed, 27 insertions(+)
create mode 100644 Documentation/devicetree/bindings/misc/seven-seg-gpio.txt
diff --git a/Documentation/devicetree/bindings/misc/seven-seg-gpio.txt
b/Documentation/devicetree/bindings/misc/seven-seg-gpio.txt
new file mode 100644
index 0000000..9a4e255
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+++ b/Documentation/devicetree/bindings/misc/seven-seg-gpio.txt
@@ -0,0 +1,27 @@
+This binding defines interface to add clock, data and clear GPIO lines required
+for seven segment display support.
+
+Required properties:
+- compatible : should be "seven-seg-gpio-dev".
+- clock-gpios : Should specify the GPIO pin connected to the Clock line on the
+ hardware.
+- data-gpios : Should specify the GPIO pin connected to Data line on the
+ hardware.
+- clear-gpios : Should specify the GPIO pin connected to Clear line on the
+ hardware.
+
+Optional properties:
+- refresh-interval-ms : The interval at which to refresh the display.
+ If this property is not present, the default value is 1000.
+
+Examples:
+
+#include <dt-bindings/gpio/gpio.h>
+
+seven-seg-disp {
+ compatible = "seven-seg-gpio-dev";
+ refresh-interval-ms = "1000";
+ clock-gpios = <&gpio 0 GPIO_ACTIVE_LOW>;
+ data-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+ clear-gpios = <&gpio 2 GPIO_ACTIVE_HIGH>;
+};
--
2.8.0.rc3.226.g39d4020
