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| author | M'boumba Cedric Madianga <cedric.madianga@gmail.com> | 2017-01-19 14:25:12 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2017-01-25 21:20:20 +0100 |
| commit | 33eb46e1dca1cdeeb4b5a7e794f7b8c3eb98fba4 (patch) | |
| tree | b7661ff72d1ee59af8c3de5e50dc4fdb16601f87 /Documentation | |
| parent | 7a308bb3016f57e5be11a677d15b821536419d36 (diff) | |
| download | linux-33eb46e1dca1cdeeb4b5a7e794f7b8c3eb98fba4.tar.gz linux-33eb46e1dca1cdeeb4b5a7e794f7b8c3eb98fba4.tar.xz | |
dt-bindings: Document the STM32 I2C bindings
This patch adds documentation of device tree bindings for the STM32 I2C
controller.
Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/i2c/i2c-stm32.txt | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/i2c/i2c-stm32.txt b/Documentation/devicetree/bindings/i2c/i2c-stm32.txt new file mode 100644 index 000000000000..78eaf7b718ed --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-stm32.txt @@ -0,0 +1,33 @@ +* I2C controller embedded in STMicroelectronics STM32 I2C platform + +Required properties : +- compatible : Must be "st,stm32f4-i2c" +- reg : Offset and length of the register set for the device +- interrupts : Must contain the interrupt id for I2C event and then the + interrupt id for I2C error. +- resets: Must contain the phandle to the reset controller. +- clocks: Must contain the input clock of the I2C instance. +- A pinctrl state named "default" must be defined to set pins in mode of + operation for I2C transfer +- #address-cells = <1>; +- #size-cells = <0>; + +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@40005400 { + compatible = "st,stm32f4-i2c"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0x40005400 0x400>; + interrupts = <31>, + <32>; + resets = <&rcc 277>; + clocks = <&rcc 0 149>; + pinctrl-0 = <&i2c1_sda_pin>, <&i2c1_scl_pin>; + pinctrl-names = "default"; + }; |