dt-bindings: add bindings for i2c-pca-platform
authorChris Packham <chris.packham@alliedtelesis.co.nz>
Mon, 26 Jun 2017 00:44:30 +0000 (12:44 +1200)
committerWolfram Sang <wsa@the-dreams.de>
Tue, 27 Jun 2017 19:37:26 +0000 (21:37 +0200)
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Documentation/devicetree/bindings/i2c/i2c-pca-platform.txt [new file with mode: 0644]

diff --git a/Documentation/devicetree/bindings/i2c/i2c-pca-platform.txt b/Documentation/devicetree/bindings/i2c/i2c-pca-platform.txt
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+* NXP PCA PCA9564/PCA9665 I2C controller
+
+The PCA9564/PCA9665 serves as an interface between most standard
+parallel-bus microcontrollers/microprocessors and the serial I2C-bus
+and allows the parallel bus system to communicate bi-directionally
+with the I2C-bus.
+
+Required properties :
+
+ - reg : Offset and length of the register set for the device
+ - compatible : one of "nxp,pca9564" or "nxp,pca9665"
+
+Optional properties
+ - interrupts : the interrupt number
+ - interrupt-parent : the phandle for the interrupt controller.
+   If an interrupt is not specified polling will be used.
+ - reset-gpios : gpio specifier for gpio connected to RESET_N pin. As the line
+   is active low, it should be marked GPIO_ACTIVE_LOW.
+ - clock-frequency : I2C bus frequency.
+
+Example:
+       i2c0: i2c@80000 {
+               compatible = "nxp,pca9564";
+               #address-cells = <1>;
+               #size-cells = <0>;
+               reg = <0x80000 0x4>;
+               reset-gpios = <&gpio1 0 GPIO_ACTIVE_LOW>;
+               clock-frequency = <100000>;
+       };