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1========================2Kernel driver i2c-ocores3========================4 5Supported adapters:6 * OpenCores.org I2C controller by Richard Herveille (see datasheet link)7 https://opencores.org/project/i2c/overview8 9Author: Peter Korsgaard <peter@korsgaard.com>10 11Description12-----------13 14i2c-ocores is an i2c bus driver for the OpenCores.org I2C controller15IP core by Richard Herveille.16 17Usage18-----19 20i2c-ocores uses the platform bus, so you need to provide a struct21platform_device with the base address and interrupt number. The22dev.platform_data of the device should also point to a struct23ocores_i2c_platform_data (see linux/platform_data/i2c-ocores.h) describing the24distance between registers and the input clock speed.25There is also a possibility to attach a list of i2c_board_info which26the i2c-ocores driver will add to the bus upon creation.27 28E.G. something like::29 30 static struct resource ocores_resources[] = {31 [0] = {32 .start = MYI2C_BASEADDR,33 .end = MYI2C_BASEADDR + 8,34 .flags = IORESOURCE_MEM,35 },36 [1] = {37 .start = MYI2C_IRQ,38 .end = MYI2C_IRQ,39 .flags = IORESOURCE_IRQ,40 },41 };42 43 /* optional board info */44 struct i2c_board_info ocores_i2c_board_info[] = {45 {46 I2C_BOARD_INFO("tsc2003", 0x48),47 .platform_data = &tsc2003_platform_data,48 .irq = TSC_IRQ49 },50 {51 I2C_BOARD_INFO("adv7180", 0x42 >> 1),52 .irq = ADV_IRQ53 }54 };55 56 static struct ocores_i2c_platform_data myi2c_data = {57 .regstep = 2, /* two bytes between registers */58 .clock_khz = 50000, /* input clock of 50MHz */59 .devices = ocores_i2c_board_info, /* optional table of devices */60 .num_devices = ARRAY_SIZE(ocores_i2c_board_info), /* table size */61 };62 63 static struct platform_device myi2c = {64 .name = "ocores-i2c",65 .dev = {66 .platform_data = &myi2c_data,67 },68 .num_resources = ARRAY_SIZE(ocores_resources),69 .resource = ocores_resources,70 };71