Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / i2c / i2c-gpio.txt

diff --git a/kernel/Documentation/devicetree/bindings/i2c/i2c-gpio.txt b/kernel/Documentation/devicetree/bindings/i2c/i2c-gpio.txt
new file mode 100644 (file)
index 0000000..4f8ec94
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/i2c/i2c-gpio.txt
@@ -0,0 +1,32 @@
+Device-Tree bindings for i2c gpio driver
+
+Required properties:
+       - compatible = "i2c-gpio";
+       - gpios: sda and scl gpio
+
+
+Optional properties:
+       - i2c-gpio,sda-open-drain: sda as open drain
+       - i2c-gpio,scl-open-drain: scl as open drain
+       - i2c-gpio,scl-output-only: scl as output only
+       - i2c-gpio,delay-us: delay between GPIO operations (may depend on each platform)
+       - i2c-gpio,timeout-ms: timeout to get data
+
+Example nodes:
+
+i2c@0 {
+       compatible = "i2c-gpio";
+       gpios = <&pioA 23 0 /* sda */
+                &pioA 24 0 /* scl */
+               >;
+       i2c-gpio,sda-open-drain;
+       i2c-gpio,scl-open-drain;
+       i2c-gpio,delay-us = <2>;        /* ~100 kHz */
+       #address-cells = <1>;
+       #size-cells = <0>;
+
+       rv3029c2@56 {
+               compatible = "rv3029c2";
+               reg = <0x56>;
+       };
+};