From a532278074f1d1fa7d46b144e0d4b824ae7d3335 Mon Sep 17 00:00:00 2001
From: Koen Kooi <koen@dominion.thruhere.net>
Date: Wed, 8 Aug 2012 00:57:35 +0000
Subject: omap4 i2c: add support for i2c bus 4

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>

diff --git a/arch/arm/include/asm/arch-omap4/cpu.h b/arch/arm/include/asm/arch-omap4/cpu.h
index a8c4c60..3a0bfbf 100644
--- a/arch/arm/include/asm/arch-omap4/cpu.h
+++ b/arch/arm/include/asm/arch-omap4/cpu.h
@@ -138,6 +138,7 @@ struct watchdog {
 #define I2C_BASE1		(OMAP44XX_L4_PER_BASE + 0x70000)
 #define I2C_BASE2		(OMAP44XX_L4_PER_BASE + 0x72000)
 #define I2C_BASE3		(OMAP44XX_L4_PER_BASE + 0x60000)
+#define I2C_BASE4		(OMAP44XX_L4_PER_BASE + 0x350000)
 
 /* MUSB base */
 #define MUSB_BASE		(OMAP44XX_L4_CORE_BASE + 0xAB000)
diff --git a/arch/arm/include/asm/arch-omap4/i2c.h b/arch/arm/include/asm/arch-omap4/i2c.h
index a91b4c2..02ee2f8 100644
--- a/arch/arm/include/asm/arch-omap4/i2c.h
+++ b/arch/arm/include/asm/arch-omap4/i2c.h
@@ -23,7 +23,7 @@
 #ifndef _OMAP4_I2C_H_
 #define _OMAP4_I2C_H_
 
-#define I2C_BUS_MAX	3
+#define I2C_BUS_MAX	4
 #define I2C_DEFAULT_BASE	I2C_BASE1
 
 struct i2c {
diff --git a/drivers/i2c/omap24xx_i2c.c b/drivers/i2c/omap24xx_i2c.c
index 978507b..094305f 100644
--- a/drivers/i2c/omap24xx_i2c.c
+++ b/drivers/i2c/omap24xx_i2c.c
@@ -442,6 +442,14 @@ int i2c_set_bus_num(unsigned int bus)
 		return -1;
 	}
 
+#if I2C_BUS_MAX == 4
+	if (bus == 3)
+		i2c_base = (struct i2c *)I2C_BASE4;
+	else
+	if (bus == 2)
+		i2c_base = (struct i2c *)I2C_BASE3;
+	else
+#endif
 #if I2C_BUS_MAX == 3
 	if (bus == 2)
 		i2c_base = (struct i2c *)I2C_BASE3;
-- 
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