I2c

arch/arm/mach-bcm2708/bcm2708.c

@@ -103,6 +103,11 @@ static struct map_desc bcm2708_io_desc[] __initdata = {
 	 .length = SZ_4K,
 	 .type = MT_DEVICE},
 #endif
+	{
+	 .virtual = IO_ADDRESS(I2C0_BASE),
+	 .pfn = __phys_to_pfn(I2C0_BASE),
+	 .length = SZ_4K,
+	 .type = MT_DEVICE},
 	{
 	 .virtual = IO_ADDRESS(DMA_BASE),
 	 .pfn = __phys_to_pfn(DMA_BASE),
@@ -304,6 +309,26 @@ static struct platform_device bcm2708_uart1_device = {
 		},
 };
 
+static struct resource bcm2708_i2c0_resources[] = {
+	{
+		.start = I2C0_BASE,
+		.end = I2C0_BASE + SZ_4K - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	{
+		.start = IRQ_I2C,
+		.end = IRQ_I2C,
+		.flags = IORESOURCE_IRQ,
+	}
+};
+
+static struct platform_device bcm2708_i2c0_device = {
+	.name = "i2c-bcm2708",
+	.id = 0,
+	.resource = bcm2708_i2c0_resources,
+	.num_resources = ARRAY_SIZE(bcm2708_i2c0_resources),
+};
+
 static struct resource bcm2708_usb_resources[] = {
 	[0] = {
 	       .start = USB_BASE,
@@ -491,6 +516,7 @@ void __init bcm2708_init(void)
 	bcm_register_device(&bcm2708_fb_device);
 	bcm_register_device(&bcm2708_usb_device);
 	bcm_register_device(&bcm2708_uart1_device);
+	bcm_register_device(&bcm2708_i2c0_device);
 	bcm_register_device(&bcm2708_powerman_device);
 #ifdef CONFIG_MMC_SDHCI_BCM2708
 	bcm_register_device(&bcm2708_emmc_device);

arch/arm/mach-bcm2708/bcm2708_gpio.c

@@ -273,6 +273,10 @@ static int bcm2708_gpio_probe(struct platform_device *dev)
 	ucb->gc.set = bcm2708_gpio_set;
 	ucb->gc.can_sleep = 0;
 
+	/* Hack: Set GPIOs 0/1 to ALT0 (I2C0) */
+	bcm2708_set_function(&ucb->gc, 0, GPIO_FSEL_ALT0);
+	bcm2708_set_function(&ucb->gc, 1, GPIO_FSEL_ALT0);
+
 	err = gpiochip_add(&ucb->gc);
 	if (err)
 		goto err;

arch/arm/mach-bcm2708/include/mach/platform.h

@@ -63,6 +63,7 @@
 #define GPIO_BASE                (BCM2708_PERI_BASE + 0x200000) /* GPIO */
 #define UART0_BASE               (BCM2708_PERI_BASE + 0x201000)	/* Uart 0 */
 #define MMCI0_BASE               (BCM2708_PERI_BASE + 0x202000) /* MMC interface */
+#define I2C0_BASE                (BCM2708_PERI_BASE + 0x205000)
 #define UART1_BASE               (BCM2708_PERI_BASE + 0x215000) /* Uart 1 */
 #define EMMC_BASE                (BCM2708_PERI_BASE + 0x300000) /* eMMC interface */
 #define SMI_BASE		 (BCM2708_PERI_BASE + 0x600000) /* SMI */

drivers/i2c/busses/Kconfig

@@ -687,6 +687,18 @@ config I2C_EG20T
 	  ML7213/ML7223 is companion chip for Intel Atom E6xx series.
 	  ML7213/ML7223 is completely compatible for Intel EG20T PCH.
 
+config I2C_BCM2708
+	tristate "Broadcom BCM2708 I2C controller"
+	depends on ARCH_BCM2708
+	help
+	  If you say yes to this option, support will be included for the
+	  BCM2708 I2C controller.
+
+	  If you don't know what to do here, say N.
+
+	  This support is also available as a module.  If so, the module
+	  will be called i2c-bcm2708.
+
 comment "External I2C/SMBus adapter drivers"
 
 config I2C_DIOLAN_U2C

drivers/i2c/busses/Makefile

@@ -66,6 +66,7 @@ obj-$(CONFIG_I2C_VERSATILE)	+= i2c-versatile.o
 obj-$(CONFIG_I2C_OCTEON)	+= i2c-octeon.o
 obj-$(CONFIG_I2C_XILINX)	+= i2c-xiic.o
 obj-$(CONFIG_I2C_EG20T)         += i2c-eg20t.o
+obj-$(CONFIG_I2C_BCM2708)	+= i2c-bcm2708.o
 
 # External I2C/SMBus adapter drivers
 obj-$(CONFIG_I2C_DIOLAN_U2C)	+= i2c-diolan-u2c.o