From 6145197be6cc0583fa1a2f4ec1079d366137061e Mon Sep 17 00:00:00 2001 From: Benoit Cousson Date: Thu, 22 Dec 2011 15:56:36 +0100 Subject: i2c: OMAP: Add DT support for i2c controller Add initial DT support to retrieve the frequency using a DT attribute instead of the pdata pointer if of_node exist. Add documentation for omap i2c controller binding. Based on original patches from Manju and Grant. Signed-off-by: Benoit Cousson Cc: Ben Dooks Reviewed-by: Rob Herring Acked-by: Grant Likely Signed-off-by: Kevin Hilman --- Documentation/devicetree/bindings/i2c/omap-i2c.txt | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 Documentation/devicetree/bindings/i2c/omap-i2c.txt (limited to 'Documentation/devicetree/bindings/i2c/omap-i2c.txt') diff --git a/Documentation/devicetree/bindings/i2c/omap-i2c.txt b/Documentation/devicetree/bindings/i2c/omap-i2c.txt new file mode 100644 index 00000000000..56564aa4b44 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/omap-i2c.txt @@ -0,0 +1,30 @@ +I2C for OMAP platforms + +Required properties : +- compatible : Must be "ti,omap3-i2c" or "ti,omap4-i2c" +- ti,hwmods : Must be "i2c", n being the instance number (1-based) +- #address-cells = <1>; +- #size-cells = <0>; + +Recommended properties : +- clock-frequency : Desired I2C bus clock frequency in Hz. Otherwise + the default 100 kHz frequency will be used. + +Optional properties: +- Child nodes conforming to i2c bus binding + +Note: Current implementation will fetch base address, irq and dma +from omap hwmod data base during device registration. +Future plan is to migrate hwmod data base contents into device tree +blob so that, all the required data will be used from device tree dts +file. + +Examples : + +i2c1: i2c@0 { + compatible = "ti,omap3-i2c"; + #address-cells = <1>; + #size-cells = <0>; + ti,hwmods = "i2c1"; + clock-frequency = <400000>; +}; -- cgit v1.2.3