diff options
| author | Patrice Chotard | 2017-08-09 14:45:27 +0200 |
|---|---|---|
| committer | Heiko Schocher | 2017-08-23 07:04:40 +0200 |
| commit | 4fadcaf097887d94c909fd924864f435c69c9182 (patch) | |
| tree | 8ddfc2036b83436930161d69583340276ca20e06 /doc | |
| parent | 90ae53ce1ae665a1b43ecf5ccafc339839392427 (diff) | |
i2c: add i2c driver for stm32
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>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/device-tree-bindings/i2c/i2c-stm32.txt | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/i2c/i2c-stm32.txt b/doc/device-tree-bindings/i2c/i2c-stm32.txt new file mode 100644 index 00000000000..df03743ace5 --- /dev/null +++ b/doc/device-tree-bindings/i2c/i2c-stm32.txt @@ -0,0 +1,30 @@ +* I2C controller embedded in STMicroelectronis STM32 platforms + +Required properties : +- compatible : Must be "st,stm32f7-i2c" +- reg : Offset and length of the register set for the device +- 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, Fast and Fast+ + modes are implemented, possible values are 100000, 400000 and 1000000. + +Example : + + i2c1: i2c@40005400 { + compatible = "st,stm32f7-i2c"; + reg = <0x40005400 0x400>; + resets = <&rcc 181>; + clocks = <&clk_pclk1>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_i2c1>; + clock-frequency = <400000>; + #address-cells = <1>; + #size-cells = <0>; + }; |