1* Samsung's I2C controller 2 3The Samsung's I2C controller is used to interface with I2C devices. 4 5Required properties: 6 - compatible: value should be either of the following. 7 (a) "samsung, s3c2410-i2c", for i2c compatible with s3c2410 i2c. 8 (b) "samsung, s3c2440-i2c", for i2c compatible with s3c2440 i2c. 9 (c) "samsung, s3c2440-hdmiphy-i2c", for s3c2440-like i2c used 10 inside HDMIPHY block found on several samsung SoCs 11 (d) "samsung, exynos5-sata-phy-i2c", for s3c2440-like i2c used as 12 a host to SATA PHY controller on an internal bus. 13 - reg: physical base address of the controller and length of memory mapped 14 region. 15 - interrupts: interrupt number to the cpu. 16 - samsung,i2c-sda-delay: Delay (in ns) applied to data line (SDA) edges. 17 18Required for all cases except "samsung,s3c2440-hdmiphy-i2c": 19 - Samsung GPIO variant (deprecated): 20 - gpios: The order of the gpios should be the following: <SDA, SCL>. 21 The gpio specifier depends on the gpio controller. Required in all 22 cases except for "samsung,s3c2440-hdmiphy-i2c" whose input/output 23 lines are permanently wired to the respective clienta 24 - Pinctrl variant (preferred, if available): 25 - pinctrl-0: Pin control group to be used for this controller. 26 - pinctrl-names: Should contain only one value - "default". 27 28Optional properties: 29 - samsung,i2c-slave-addr: Slave address in multi-master environment. If not 30 specified, default value is 0. 31 - samsung,i2c-max-bus-freq: Desired frequency in Hz of the bus. If not 32 specified, the default value in Hz is 100000. 33 - samsung,sysreg-phandle - handle to syscon used to control the system registers 34 35Example: 36 37 i2c@13870000 { 38 compatible = "samsung,s3c2440-i2c"; 39 reg = <0x13870000 0x100>; 40 interrupts = <345>; 41 samsung,i2c-sda-delay = <100>; 42 samsung,i2c-max-bus-freq = <100000>; 43 /* Samsung GPIO variant begins here */ 44 gpios = <&gpd1 2 0 /* SDA */ 45 &gpd1 3 0 /* SCL */>; 46 /* Samsung GPIO variant ends here */ 47 /* Pinctrl variant begins here */ 48 pinctrl-0 = <&i2c3_bus>; 49 pinctrl-names = "default"; 50 /* Pinctrl variant ends here */ 51 #address-cells = <1>; 52 #size-cells = <0>; 53 54 wm8994@1a { 55 compatible = "wlf,wm8994"; 56 reg = <0x1a>; 57 }; 58 }; 59