i2c, mpc5xxx: add multibus support

Tested on upcoming hydra (mpc5200 based) board.

Signed-off-by: Heiko Schocher <hs@denx.de>

arch/powerpc/cpu/mpc5xxx/i2c.c

@@ -30,6 +30,7 @@ DECLARE_GLOBAL_DATA_PTR;
 #include <mpc5xxx.h>
 #include <i2c.h>
 
+#if !defined(CONFIG_I2C_MULTI_BUS)
 #if (CONFIG_SYS_I2C_MODULE == 2)
 #define I2C_BASE	MPC5XXX_I2C2
 #elif (CONFIG_SYS_I2C_MODULE == 1)
@@ -37,6 +38,19 @@ DECLARE_GLOBAL_DATA_PTR;
 #else
 #error CONFIG_SYS_I2C_MODULE is not properly configured
 #endif
+#else
+static unsigned int i2c_bus_num __attribute__ ((section (".data"))) =
+						CONFIG_SYS_SPD_BUS_NUM;
+static unsigned int i2c_bus_speed[2] = {CONFIG_SYS_I2C_SPEED,
+					CONFIG_SYS_I2C_SPEED};
+
+static const  unsigned long i2c_dev[2] = {
+	MPC5XXX_I2C1,
+	MPC5XXX_I2C2,
+};
+
+#define I2C_BASE	((struct mpc5xxx_i2c *)i2c_dev[i2c_bus_num])
+#endif
 
 #define I2C_TIMEOUT	6667
 #define I2C_RETRIES	3
@@ -439,4 +453,33 @@ Done:
 	return ret;
 }
 
+#if defined(CONFIG_I2C_MULTI_BUS)
+int i2c_set_bus_num(unsigned int bus)
+{
+	if (bus > 1)
+		return -1;
+
+	i2c_bus_num = bus;
+	i2c_init(i2c_bus_speed[bus], CONFIG_SYS_I2C_SLAVE);
+	return 0;
+}
+
+int i2c_set_bus_speed(unsigned int speed)
+{
+	i2c_init(speed, CONFIG_SYS_I2C_SLAVE);
+	return 0;
+}
+
+unsigned int i2c_get_bus_num(void)
+{
+	return i2c_bus_num;
+}
+
+unsigned int i2c_get_bus_speed(void)
+{
+	return i2c_bus_speed[i2c_bus_num];
+}
+#endif
+
+
 #endif	/* CONFIG_HARD_I2C */