Kernel driver i2c-ocores Supported adapters: * OpenCores.org I2C controller by Richard Herveille (see datasheet link) Datasheet: http://www.opencores.org/projects.cgi/web/i2c/overview Author: Peter Korsgaard Description ----------- i2c-ocores is an i2c bus driver for the OpenCores.org I2C controller IP core by Richard Herveille. Usage ----- i2c-ocores uses the platform bus, so you need to provide a struct platform_device with the base address and interrupt number. The dev.platform_data of the device should also point to a struct ocores_i2c_platform_data (see linux/i2c-ocores.h) describing the distance between registers and the input clock speed. E.G. something like: static struct resource ocores_resources[] = { [0] = { .start = MYI2C_BASEADDR, .end = MYI2C_BASEADDR + 8, .flags = IORESOURCE_MEM, }, [1] = { .start = MYI2C_IRQ, .end = MYI2C_IRQ, .flags = IORESOURCE_IRQ, }, }; static struct ocores_i2c_platform_data myi2c_data = { .regstep = 2, /* two bytes between registers */ .clock_khz = 50000, /* input clock of 50MHz */ }; static struct platform_device myi2c = { .name = "ocores-i2c", .dev = { .platform_data = &myi2c_data, }, .num_resources = ARRAY_SIZE(ocores_resources), .resource = ocores_resources, };