These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / gpio / netxbig-gpio-ext.txt

diff --git a/kernel/Documentation/devicetree/bindings/gpio/netxbig-gpio-ext.txt b/kernel/Documentation/devicetree/bindings/gpio/netxbig-gpio-ext.txt
new file mode 100644 (file)
index 0000000..50ec2e6
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/gpio/netxbig-gpio-ext.txt
@@ -0,0 +1,22 @@
+Binding for the GPIO extension bus found on some LaCie/Seagate boards
+(Example: 2Big/5Big Network v2, 2Big NAS).
+
+Required properties:
+- compatible: "lacie,netxbig-gpio-ext".
+- addr-gpios: GPIOs representing the address register (LSB -> MSB).
+- data-gpios: GPIOs representing the data register (LSB -> MSB).
+- enable-gpio: latches the new configuration (address, data) on raising edge.
+
+Example:
+
+netxbig_gpio_ext: netxbig-gpio-ext {
+       compatible = "lacie,netxbig-gpio-ext";
+
+       addr-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH
+                     &gpio1 16 GPIO_ACTIVE_HIGH
+                     &gpio1 17 GPIO_ACTIVE_HIGH>;
+       data-gpios = <&gpio1 12 GPIO_ACTIVE_HIGH
+                     &gpio1 13 GPIO_ACTIVE_HIGH
+                     &gpio1 14 GPIO_ACTIVE_HIGH>;
+       enable-gpio = <&gpio0 29 GPIO_ACTIVE_HIGH>;
+};