1I2C gpio device binding
2=======================
3
4Driver:
5- drivers/i2c/i2c-gpio.c
6
7Software i2c device-tree node properties:
8Required:
9* #address-cells = <1>;
10* #size-cells = <0>;
11* compatible = "i2c-gpio";
12* gpios = <sda ...>, <scl ...>;
13
14Optional:
15* i2c-gpio,delay-us = <5>;
16   The resulting transfer speed can be adjusted by setting the delay[us]
17   between gpio-toggle operations. Speed [Hz] = 1000000 / 4 * udelay[us],
18   It not defined, then default is 5us (~50KHz).
19
20Example:
21
22i2c-gpio@1 {
23	#address-cells = <1>;
24	#size-cells = <0>;
25
26	compatible = "i2c-gpio";
27	gpios = <&gpd1 0 GPIO_ACTIVE_HIGH>, /* SDA */
28		<&gpd1 1 GPIO_ACTIVE_HIGH>; /* CLK */
29
30	i2c-gpio,delay-us = <5>;
31
32	some_device@5 {
33		compatible = "some_device";
34		reg = <0x5>;
35		...
36	};
37};
38