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




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Based on kernel version 3.9. Page generated on 2013-05-02 22:58 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	  - 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	
18	Required 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	
28	Optional properties:
29	  - samsung,i2c-slave-addr: Slave address in multi-master enviroment. 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	
34	Example:
35	
36		i2c@13870000 {
37			compatible = "samsung,s3c2440-i2c";
38			reg = <0x13870000 0x100>;
39			interrupts = <345>;
40			samsung,i2c-sda-delay = <100>;
41			samsung,i2c-max-bus-freq = <100000>;
42			/* Samsung GPIO variant begins here */
43			gpios = <&gpd1 2 0 /* SDA */
44				 &gpd1 3 0 /* SCL */>;
45			/* Samsung GPIO variant ends here */
46			/* Pinctrl variant begins here */
47			pinctrl-0 = <&i2c3_bus>;
48			pinctrl-names = "default";
49			/* Pinctrl variant ends here */
50			#address-cells = <1>;
51			#size-cells = <0>;
52	
53			wm8994@1a {
54				compatible = "wlf,wm8994";
55				reg = <0x1a>;
56			};
57		};
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