1Kernel driver i2c-ocores
2
3Supported adapters:
4  * OpenCores.org I2C controller by Richard Herveille (see datasheet link)
5    Datasheet: http://www.opencores.org/projects.cgi/web/i2c/overview
6
7Author: Peter Korsgaard <jacmet@sunsite.dk>
8
9Description
10-----------
11
12i2c-ocores is an i2c bus driver for the OpenCores.org I2C controller
13IP core by Richard Herveille.
14
15Usage
16-----
17
18i2c-ocores uses the platform bus, so you need to provide a struct
19platform_device with the base address and interrupt number. The
20dev.platform_data of the device should also point to a struct
21ocores_i2c_platform_data (see linux/i2c-ocores.h) describing the
22distance between registers and the input clock speed.
23
24E.G. something like:
25
26static struct resource ocores_resources[] = {
27	[0] = {
28		.start	= MYI2C_BASEADDR,
29		.end	= MYI2C_BASEADDR + 8,
30		.flags	= IORESOURCE_MEM,
31	},
32	[1] = {
33		.start	= MYI2C_IRQ,
34		.end	= MYI2C_IRQ,
35		.flags	= IORESOURCE_IRQ,
36	},
37};
38
39static struct ocores_i2c_platform_data myi2c_data = {
40	.regstep	= 2,		/* two bytes between registers */
41	.clock_khz	= 50000,	/* input clock of 50MHz */
42};
43
44static struct platform_device myi2c = {
45	.name			= "ocores-i2c",
46	.dev = {
47		.platform_data	= &myi2c_data,
48	},
49	.num_resources		= ARRAY_SIZE(ocores_resources),
50	.resource		= ocores_resources,
51};
52