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4fadcaf097
Add i2c driver which can be used on both STM32F7 and STM32H7. This I2C block supports the following features: _ Slave and master modes _ Multimaster capability _ Standard-mode (up to 100 kHz) _ Fast-mode (up to 400 kHz) _ Fast-mode Plus (up to 1 MHz) _ 7-bit and 10-bit addressing mode _ Multiple 7-bit slave addresses (2 addresses, 1 with configurable mask) _ All 7-bit addresses acknowledge mode _ General call _ Programmable setup and hold times _ Easy to use event management _ Optional clock stretching _ Software reset Signed-off-by: Christophe Kerello <christophe.kerello@st.com> Signed-off-by: Patrice Chotard <patrice.chotard@st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
31 lines
984 B
Plaintext
31 lines
984 B
Plaintext
* I2C controller embedded in STMicroelectronis STM32 platforms
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Required properties :
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- compatible : Must be "st,stm32f7-i2c"
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- reg : Offset and length of the register set for the device
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- resets: Must contain the phandle to the reset controller
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- clocks: Must contain the input clock of the I2C instance
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- A pinctrl state named "default" must be defined to set pins in mode of
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operation for I2C transfer
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- #address-cells = <1>;
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- #size-cells = <0>;
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Optional properties :
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- clock-frequency : Desired I2C bus clock frequency in Hz. If not specified,
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the default 100 kHz frequency will be used. As only Normal, Fast and Fast+
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modes are implemented, possible values are 100000, 400000 and 1000000.
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Example :
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i2c1: i2c@40005400 {
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compatible = "st,stm32f7-i2c";
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reg = <0x40005400 0x400>;
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resets = <&rcc 181>;
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clocks = <&clk_pclk1>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_i2c1>;
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clock-frequency = <400000>;
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#address-cells = <1>;
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#size-cells = <0>;
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};
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