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- 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>;
- ...
- };
- };
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