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Documentation / devicetree / bindings / i2c / i2c-at91.txt




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Based on kernel version 4.7.2. Page generated on 2016-08-22 22:41 EST.

1	I2C for Atmel platforms
2	
3	Required properties :
4	- compatible : Must be "atmel,at91rm9200-i2c", "atmel,at91sam9261-i2c",
5	     "atmel,at91sam9260-i2c", "atmel,at91sam9g20-i2c", "atmel,at91sam9g10-i2c",
6	     "atmel,at91sam9x5-i2c", "atmel,sama5d4-i2c" or "atmel,sama5d2-i2c"
7	- reg: physical base address of the controller and length of memory mapped
8	     region.
9	- interrupts: interrupt number to the cpu.
10	- #address-cells = <1>;
11	- #size-cells = <0>;
12	- clocks: phandles to input clocks.
13	
14	Optional properties:
15	- clock-frequency: Desired I2C bus frequency in Hz, otherwise defaults to 100000
16	- dmas: A list of two dma specifiers, one for each entry in dma-names.
17	- dma-names: should contain "tx" and "rx".
18	- atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO
19	  capable I2C controllers.
20	- i2c-sda-hold-time-ns: TWD hold time, only available for "atmel,sama5d4-i2c"
21	  and "atmel,sama5d2-i2c".
22	- Child nodes conforming to i2c bus binding
23	
24	Examples :
25	
26	i2c0: i2c@fff84000 {
27		compatible = "atmel,at91sam9g20-i2c";
28		reg = <0xfff84000 0x100>;
29		interrupts = <12 4 6>;
30		#address-cells = <1>;
31		#size-cells = <0>;
32		clocks = <&twi0_clk>;
33		clock-frequency = <400000>;
34	
35		24c512@50 {
36			compatible = "24c512";
37			reg = <0x50>;
38			pagesize = <128>;
39		}
40	}
41	
42	i2c0: i2c@f8034600 {
43		compatible = "atmel,sama5d2-i2c";
44		reg = <0xf8034600 0x100>;
45		interrupts = <19 IRQ_TYPE_LEVEL_HIGH 7>;
46		dmas = <&dma0
47			(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
48			AT91_XDMAC_DT_PERID(11)>,
49		       <&dma0
50			(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
51			AT91_XDMAC_DT_PERID(12)>;
52		dma-names = "tx", "rx";
53		#address-cells = <1>;
54		#size-cells = <0>;
55		clocks = <&flx0>;
56		atmel,fifo-size = <16>;
57		i2c-sda-hold-time-ns = <336>;
58	
59		wm8731: wm8731@1a {
60			compatible = "wm8731";
61			reg = <0x1a>;
62		};
63	};
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