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Based on kernel version 3.16. Page generated on 2014-08-06 21:39 EST.

1	Kernel driver i2c-ocores
2	
3	Supported adapters:
4	  * OpenCores.org I2C controller by Richard Herveille (see datasheet link)
5	    Datasheet: http://www.opencores.org/projects.cgi/web/i2c/overview
6	
7	Author: Peter Korsgaard <jacmet@sunsite.dk>
8	
9	Description
10	-----------
11	
12	i2c-ocores is an i2c bus driver for the OpenCores.org I2C controller
13	IP core by Richard Herveille.
14	
15	Usage
16	-----
17	
18	i2c-ocores uses the platform bus, so you need to provide a struct
19	platform_device with the base address and interrupt number. The
20	dev.platform_data of the device should also point to a struct
21	ocores_i2c_platform_data (see linux/i2c-ocores.h) describing the
22	distance between registers and the input clock speed.
23	There is also a possibility to attach a list of i2c_board_info which
24	the i2c-ocores driver will add to the bus upon creation.
25	
26	E.G. something like:
27	
28	static struct resource ocores_resources[] = {
29		[0] = {
30			.start	= MYI2C_BASEADDR,
31			.end	= MYI2C_BASEADDR + 8,
32			.flags	= IORESOURCE_MEM,
33		},
34		[1] = {
35			.start	= MYI2C_IRQ,
36			.end	= MYI2C_IRQ,
37			.flags	= IORESOURCE_IRQ,
38		},
39	};
40	
41	/* optional board info */
42	struct i2c_board_info ocores_i2c_board_info[] = {
43		{
44			I2C_BOARD_INFO("tsc2003", 0x48),
45			.platform_data = &tsc2003_platform_data,
46			.irq = TSC_IRQ
47		},
48		{
49			I2C_BOARD_INFO("adv7180", 0x42 >> 1),
50			.irq = ADV_IRQ
51		}
52	};
53	
54	static struct ocores_i2c_platform_data myi2c_data = {
55		.regstep	= 2,		/* two bytes between registers */
56		.clock_khz	= 50000,	/* input clock of 50MHz */
57		.devices	= ocores_i2c_board_info, /* optional table of devices */
58		.num_devices	= ARRAY_SIZE(ocores_i2c_board_info), /* table size */
59	};
60	
61	static struct platform_device myi2c = {
62		.name			= "ocores-i2c",
63		.dev = {
64			.platform_data	= &myi2c_data,
65		},
66		.num_resources		= ARRAY_SIZE(ocores_resources),
67		.resource		= ocores_resources,
68	};
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