| 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>; | |
| ... | |
| }; | |
| }; |