[PATCH v8 1/5] dt-bindings: Document the STM32 I2C bindings
From: M'boumba Cedric Madianga <hidden>
Date: 2017-01-05 09:09:34
Also in:
linux-devicetree, linux-i2c, lkml
Subsystem:
i2c subsystem host drivers, open firmware and flattened device tree bindings, the rest · Maintainers:
Andi Shyti, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
This patch adds documentation of device tree bindings for the STM32 I2C controller. Signed-off-by: M'boumba Cedric Madianga <redacted> Acked-by: Rob Herring <robh@kernel.org> --- .../devicetree/bindings/i2c/i2c-stm32.txt | 33 ++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 Documentation/devicetree/bindings/i2c/i2c-stm32.txt
diff --git a/Documentation/devicetree/bindings/i2c/i2c-stm32.txt b/Documentation/devicetree/bindings/i2c/i2c-stm32.txt
new file mode 100644
index 0000000..78eaf7b
--- /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 at 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"; + };
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1.9.1