| Patrice Chotard | ebf442d | 2017-08-09 14:45:27 +0200 | [diff] [blame] | 1 | * I2C controller embedded in STMicroelectronis STM32 platforms |
| 2 | |
| 3 | Required properties : |
| 4 | - compatible : Must be "st,stm32f7-i2c" |
| 5 | - reg : Offset and length of the register set for the device |
| 6 | - resets: Must contain the phandle to the reset controller |
| 7 | - clocks: Must contain the input clock of the I2C instance |
| 8 | - A pinctrl state named "default" must be defined to set pins in mode of |
| 9 | operation for I2C transfer |
| 10 | - #address-cells = <1>; |
| 11 | - #size-cells = <0>; |
| 12 | |
| 13 | Optional properties : |
| 14 | - clock-frequency : Desired I2C bus clock frequency in Hz. If not specified, |
| 15 | the default 100 kHz frequency will be used. As only Normal, Fast and Fast+ |
| 16 | modes are implemented, possible values are 100000, 400000 and 1000000. |
| 17 | |
| 18 | Example : |
| 19 | |
| 20 | i2c1: i2c@40005400 { |
| 21 | compatible = "st,stm32f7-i2c"; |
| 22 | reg = <0x40005400 0x400>; |
| 23 | resets = <&rcc 181>; |
| 24 | clocks = <&clk_pclk1>; |
| 25 | pinctrl-names = "default"; |
| 26 | pinctrl-0 = <&pinctrl_i2c1>; |
| 27 | clock-frequency = <400000>; |
| 28 | #address-cells = <1>; |
| 29 | #size-cells = <0>; |
| 30 | }; |