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authorAnders Berg <anders.berg@avagotech.com>2014-10-03 13:08:02 +0200
committerWolfram Sang <wsa@the-dreams.de>2014-10-03 14:11:53 +0200
commit08678b850cd0c49cc49c7fed0c93f720f85368e8 (patch)
treed8c2d3c7d9f0b8870eaafcaf7664288839676746 /Documentation
parent2374a5399b7263eb1afc6b5522a56ebf9f0b8636 (diff)
downloadblackbird-op-linux-08678b850cd0c49cc49c7fed0c93f720f85368e8.tar.gz
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i2c: axxia: Add I2C driver for AXM55xx
Add I2C bus driver for the controller found in the LSI Axxia family SoCs. The driver implements 10-bit addressing and SMBus transfer modes via emulation (including SMBus block data read). Signed-off-by: Anders Berg <anders.berg@avagotech.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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diff --git a/Documentation/devicetree/bindings/i2c/i2c-axxia.txt b/Documentation/devicetree/bindings/i2c/i2c-axxia.txt
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+LSI Axxia I2C
+
+Required properties :
+- compatible : Must be "lsi,api2c"
+- reg : Offset and length of the register set for the device
+- interrupts : the interrupt specifier
+- #address-cells : Must be <1>;
+- #size-cells : Must be <0>;
+- clock-names : Must contain "i2c".
+- clocks: Must contain an entry for each name in clock-names. See the common
+ clock bindings.
+
+Optional properties :
+- clock-frequency : Desired I2C bus clock frequency in Hz. If not specified,
+ the default 100 kHz frequency will be used. As only Normal and Fast modes
+ are supported, possible values are 100000 and 400000.
+
+Example :
+
+i2c@02010084000 {
+ compatible = "lsi,api2c";
+ device_type = "i2c";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x20 0x10084000 0x00 0x1000>;
+ interrupts = <0 19 4>;
+ clocks = <&clk_per>;
+ clock-names = "i2c";
+ clock-frequency = <400000>;
+};
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