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




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Based on kernel version 3.16. Page generated on 2014-08-06 21:37 EST.

1	* Synopsys DesignWare I2C
2	
3	Required properties :
4	
5	 - compatible : should be "snps,designware-i2c"
6	 - reg : Offset and length of the register set for the device
7	 - interrupts : <IRQ> where IRQ is the interrupt number.
8	
9	Recommended properties :
10	
11	 - clock-frequency : desired I2C bus clock frequency in Hz.
12	
13	Optional properties :
14	 - i2c-sda-hold-time-ns : should contain the SDA hold time in nanoseconds.
15	   This option is only supported in hardware blocks version 1.11a or newer.
16	
17	 - i2c-scl-falling-time : should contain the SCL falling time in nanoseconds.
18	   This value which is by default 300ns is used to compute the tLOW period.
19	
20	 - i2c-sda-falling-time : should contain the SDA falling time in nanoseconds.
21	   This value which is by default 300ns is used to compute the tHIGH period.
22	
23	Example :
24	
25		i2c@f0000 {
26			#address-cells = <1>;
27			#size-cells = <0>;
28			compatible = "snps,designware-i2c";
29			reg = <0xf0000 0x1000>;
30			interrupts = <11>;
31			clock-frequency = <400000>;
32		};
33	
34		i2c@1120000 {
35			#address-cells = <1>;
36			#size-cells = <0>;
37			compatible = "snps,designware-i2c";
38			reg = <0x1120000 0x1000>;
39			interrupt-parent = <&ictl>;
40			interrupts = <12 1>;
41			clock-frequency = <400000>;
42			i2c-sda-hold-time-ns = <300>;
43			i2c-sda-falling-time-ns = <300>;
44			i2c-scl-falling-time-ns = <300>;
45		};
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