ARM: shmobile: r8a7779: add I2C driver support

This patch enable R-Car I2C driver
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

arch/arm/configs/marzen_defconfig

@@ -69,6 +69,8 @@ CONFIG_SERIAL_SH_SCI=y
 CONFIG_SERIAL_SH_SCI_NR_UARTS=6
 CONFIG_SERIAL_SH_SCI_CONSOLE=y
 # CONFIG_HW_RANDOM is not set
+CONFIG_I2C=y
+CONFIG_I2C_RCAR=y
 CONFIG_GPIO_SYSFS=y
 # CONFIG_HWMON is not set
 CONFIG_THERMAL=y

arch/arm/mach-shmobile/setup-r8a7779.c

@@ -229,6 +229,79 @@ static struct platform_device tmu01_device = {
 	.num_resources	= ARRAY_SIZE(tmu01_resources),
 };
 
+/* I2C */
+static struct resource rcar_i2c0_res[] = {
+	{
+		.start  = 0xffc70000,
+		.end    = 0xffc70fff,
+		.flags  = IORESOURCE_MEM,
+	}, {
+		.start  = gic_spi(79),
+		.flags  = IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device i2c0_device = {
+	.name		= "i2c-rcar",
+	.id		= 0,
+	.resource	= rcar_i2c0_res,
+	.num_resources	= ARRAY_SIZE(rcar_i2c0_res),
+};
+
+static struct resource rcar_i2c1_res[] = {
+	{
+		.start  = 0xffc71000,
+		.end    = 0xffc71fff,
+		.flags  = IORESOURCE_MEM,
+	}, {
+		.start  = gic_spi(82),
+		.flags  = IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device i2c1_device = {
+	.name		= "i2c-rcar",
+	.id		= 1,
+	.resource	= rcar_i2c1_res,
+	.num_resources	= ARRAY_SIZE(rcar_i2c1_res),
+};
+
+static struct resource rcar_i2c2_res[] = {
+	{
+		.start  = 0xffc72000,
+		.end    = 0xffc72fff,
+		.flags  = IORESOURCE_MEM,
+	}, {
+		.start  = gic_spi(80),
+		.flags  = IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device i2c2_device = {
+	.name		= "i2c-rcar",
+	.id		= 2,
+	.resource	= rcar_i2c2_res,
+	.num_resources	= ARRAY_SIZE(rcar_i2c2_res),
+};
+
+static struct resource rcar_i2c3_res[] = {
+	{
+		.start  = 0xffc73000,
+		.end    = 0xffc73fff,
+		.flags  = IORESOURCE_MEM,
+	}, {
+		.start  = gic_spi(81),
+		.flags  = IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device i2c3_device = {
+	.name		= "i2c-rcar",
+	.id		= 3,
+	.resource	= rcar_i2c3_res,
+	.num_resources	= ARRAY_SIZE(rcar_i2c3_res),
+};
+
 static struct platform_device *r8a7779_early_devices[] __initdata = {
 	&scif0_device,
 	&scif1_device,
@@ -238,6 +311,10 @@ static struct platform_device *r8a7779_early_devices[] __initdata = {
 	&scif5_device,
 	&tmu00_device,
 	&tmu01_device,
+	&i2c0_device,
+	&i2c1_device,
+	&i2c2_device,
+	&i2c3_device,
 };
 
 static struct platform_device *r8a7779_late_devices[] __initdata = {