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Documentation / devicetree / bindings / i2c / i2c-s3c2410.txt




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Based on kernel version 3.15.4. Page generated on 2014-07-07 09:00 EST.

1	* Samsung's I2C controller
2	
3	The Samsung's I2C controller is used to interface with I2C devices.
4	
5	Required 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, exynos5440-i2c", for s3c2440-like i2c used
12		   on EXYNOS5440 which does not need GPIO configuration.
13	      (e) "samsung, exynos5-sata-phy-i2c", for s3c2440-like i2c used as
14		   a host to SATA PHY controller on an internal bus.
15	  - reg: physical base address of the controller and length of memory mapped
16	    region.
17	  - interrupts: interrupt number to the cpu.
18	  - samsung,i2c-sda-delay: Delay (in ns) applied to data line (SDA) edges.
19	
20	Required for all cases except "samsung,s3c2440-hdmiphy-i2c":
21	  - Samsung GPIO variant (deprecated):
22	    - gpios: The order of the gpios should be the following: <SDA, SCL>.
23	      The gpio specifier depends on the gpio controller. Required in all
24	      cases except for "samsung,s3c2440-hdmiphy-i2c" whose input/output
25	      lines are permanently wired to the respective clienta
26	  - Pinctrl variant (preferred, if available):
27	    - pinctrl-0: Pin control group to be used for this controller.
28	    - pinctrl-names: Should contain only one value - "default".
29	
30	Optional properties:
31	  - samsung,i2c-slave-addr: Slave address in multi-master environment. If not
32	    specified, default value is 0.
33	  - samsung,i2c-max-bus-freq: Desired frequency in Hz of the bus. If not
34	    specified, the default value in Hz is 100000.
35	
36	Example:
37	
38		i2c@13870000 {
39			compatible = "samsung,s3c2440-i2c";
40			reg = <0x13870000 0x100>;
41			interrupts = <345>;
42			samsung,i2c-sda-delay = <100>;
43			samsung,i2c-max-bus-freq = <100000>;
44			/* Samsung GPIO variant begins here */
45			gpios = <&gpd1 2 0 /* SDA */
46				 &gpd1 3 0 /* SCL */>;
47			/* Samsung GPIO variant ends here */
48			/* Pinctrl variant begins here */
49			pinctrl-0 = <&i2c3_bus>;
50			pinctrl-names = "default";
51			/* Pinctrl variant ends here */
52			#address-cells = <1>;
53			#size-cells = <0>;
54	
55			wm8994@1a {
56				compatible = "wlf,wm8994";
57				reg = <0x1a>;
58			};
59		};
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