omap4: Add support for i2c init

Add support for i2c init for omap4.

This patch is based on and earlier patch by
Santosh Shilimkar <santosh.shilimkar@ti.com>.
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/plat-omap/i2c.c

@@ -38,6 +38,7 @@
 #define OMAP2_I2C_BASE1		0x48070000
 #define OMAP2_I2C_BASE2		0x48072000
 #define OMAP2_I2C_BASE3		0x48060000
+#define OMAP4_I2C_BASE4		0x48350000
 
 static const char name[] = "i2c_omap";
 
@@ -54,11 +55,14 @@ static const char name[] = "i2c_omap";
 
 static struct resource i2c_resources[][2] = {
 	{ I2C_RESOURCE_BUILDER(0, 0) },
-#if	defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
-	{ I2C_RESOURCE_BUILDER(OMAP2_I2C_BASE2, INT_24XX_I2C2_IRQ) },
+#if	defined(CONFIG_ARCH_OMAP2PLUS)
+	{ I2C_RESOURCE_BUILDER(OMAP2_I2C_BASE2, 0) },
 #endif
-#if	defined(CONFIG_ARCH_OMAP3)
-	{ I2C_RESOURCE_BUILDER(OMAP2_I2C_BASE3, INT_34XX_I2C3_IRQ) },
+#if	defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
+	{ I2C_RESOURCE_BUILDER(OMAP2_I2C_BASE3, 0) },
+#endif
+#if	defined(CONFIG_ARCH_OMAP4)
+	{ I2C_RESOURCE_BUILDER(OMAP4_I2C_BASE4, 0) },
 #endif
 };
 
@@ -76,12 +80,15 @@ static struct resource i2c_resources[][2] = {
 static struct omap_i2c_bus_platform_data i2c_pdata[ARRAY_SIZE(i2c_resources)];
 static struct platform_device omap_i2c_devices[] = {
 	I2C_DEV_BUILDER(1, i2c_resources[0], &i2c_pdata[0]),
-#if	defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
+#if	defined(CONFIG_ARCH_OMAP2PLUS)
 	I2C_DEV_BUILDER(2, i2c_resources[1], &i2c_pdata[1]),
 #endif
-#if	defined(CONFIG_ARCH_OMAP3)
+#if	defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
 	I2C_DEV_BUILDER(3, i2c_resources[2], &i2c_pdata[2]),
 #endif
+#if	defined(CONFIG_ARCH_OMAP4)
+	I2C_DEV_BUILDER(4, i2c_resources[3], &i2c_pdata[3]),
+#endif
 };
 
 #define OMAP_I2C_CMDLINE_SETUP	(BIT(31))
@@ -96,6 +103,8 @@ static int __init omap_i2c_nr_ports(void)
 		ports = 2;
 	else if (cpu_is_omap34xx())
 		ports = 3;
+	else if (cpu_is_omap44xx())
+		ports = 4;
 
 	return ports;
 }
@@ -107,6 +116,13 @@ static resource_size_t omap2_i2c_irq[3] __initdata = {
 	INT_34XX_I2C3_IRQ,
 };
 
+static resource_size_t omap4_i2c_irq[4] __initdata = {
+	OMAP44XX_IRQ_I2C1,
+	OMAP44XX_IRQ_I2C2,
+	OMAP44XX_IRQ_I2C3,
+	OMAP44XX_IRQ_I2C4,
+};
+
 static inline int omap1_i2c_add_bus(struct platform_device *pdev, int bus_id)
 {
 	struct omap_i2c_bus_platform_data *pd;
@@ -129,7 +145,10 @@ static inline int omap2_i2c_add_bus(struct platform_device *pdev, int bus_id)
 
 	res = pdev->resource;
 
-	irq = omap2_i2c_irq;
+	if (!cpu_is_omap44xx())
+		irq = omap2_i2c_irq;
+	else
+		irq = omap4_i2c_irq;
 
 	if (bus_id == 1) {
 		res[0].start = OMAP2_I2C_BASE1;