| I2C gpio device binding |
| ======================= |
| |
| Driver: |
| - drivers/i2c/i2c-gpio.c |
| |
| Software i2c device-tree node properties: |
| Required: |
| * #address-cells = <1>; |
| * #size-cells = <0>; |
| * compatible = "i2c-gpio"; |
| * gpios = <sda ...>, <scl ...>; |
| |
| Optional: |
| * i2c-gpio,delay-us = <5>; |
| The resulting transfer speed can be adjusted by setting the delay[us] |
| between gpio-toggle operations. Speed [Hz] = 1000000 / 4 * udelay[us], |
| It not defined, then default is 5us (~50KHz). |
| |
| Example: |
| |
| i2c-gpio@1 { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| compatible = "i2c-gpio"; |
| gpios = <&gpd1 0 GPIO_ACTIVE_HIGH>, /* SDA */ |
| <&gpd1 1 GPIO_ACTIVE_HIGH>; /* CLK */ |
| |
| i2c-gpio,delay-us = <5>; |
| |
| some_device@5 { |
| compatible = "some_device"; |
| reg = <0x5>; |
| ... |
| }; |
| }; |
