From 799b784aa00cb03a352847ab9f9acdde79b72d21 Mon Sep 17 00:00:00 2001
From: Heiko Schocher <hs@denx.de>
Date: Wed, 15 Oct 2008 09:34:45 +0200
Subject: [PATCH] i2c: add CONFIG_I2C_MULTI_BUS for soft_i2c and mpc8260 i2c
 driver.

Signed-off-by: Heiko Schocher <hs@denx.de>
---
 cpu/mpc8260/i2c.c      | 36 ++++++++++++++++++++++++++++++++++++
 drivers/i2c/soft_i2c.c | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 72 insertions(+)

diff --git a/cpu/mpc8260/i2c.c b/cpu/mpc8260/i2c.c
index c3af7b6d83..335177fad6 100644
--- a/cpu/mpc8260/i2c.c
+++ b/cpu/mpc8260/i2c.c
@@ -36,6 +36,10 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#if defined(CONFIG_I2C_MULTI_BUS)
+static unsigned int i2c_bus_num __attribute__ ((section ("data"))) = 0;
+#endif /* CONFIG_I2C_MULTI_BUS */
+
 /* uSec to wait between polls of the i2c */
 #define DELAY_US	100
 /* uSec to wait for the CPM to start processing the buffer */
@@ -765,4 +769,36 @@ i2c_reg_write(uchar chip, uchar reg, uchar val)
 	i2c_write(chip, reg, 1, &val, 1);
 }
 
+#if defined(CONFIG_I2C_MULTI_BUS)
+/*
+ * Functions for multiple I2C bus handling
+ */
+unsigned int i2c_get_bus_num(void)
+{
+	return i2c_bus_num;
+}
+
+int i2c_set_bus_num(unsigned int bus)
+{
+	if (bus >= CFG_MAX_I2C_BUS)
+		return -1;
+	i2c_bus_num = bus;
+
+	return 0;
+}
+/* TODO: add 100/400k switching */
+unsigned int i2c_get_bus_speed(void)
+{
+	return CFG_I2C_SPEED;
+}
+
+int i2c_set_bus_speed(unsigned int speed)
+{
+	if (speed != CFG_I2C_SPEED)
+		return -1;
+
+	return 0;
+}
+
+#endif	/* CONFIG_I2C_MULTI_BUS */
 #endif	/* CONFIG_HARD_I2C */
diff --git a/drivers/i2c/soft_i2c.c b/drivers/i2c/soft_i2c.c
index 23db2ee8ff..57736da424 100644
--- a/drivers/i2c/soft_i2c.c
+++ b/drivers/i2c/soft_i2c.c
@@ -68,6 +68,10 @@ DECLARE_GLOBAL_DATA_PTR;
 #define PRINTD(fmt,args...)
 #endif
 
+#if defined(CONFIG_I2C_MULTI_BUS)
+static unsigned int i2c_bus_num __attribute__ ((section ("data"))) = 0;
+#endif /* CONFIG_I2C_MULTI_BUS */
+
 /*-----------------------------------------------------------------------
  * Local functions
  */
@@ -230,6 +234,38 @@ static int write_byte(uchar data)
 	return(nack);	/* not a nack is an ack */
 }
 
+#if defined(CONFIG_I2C_MULTI_BUS)
+/*
+ * Functions for multiple I2C bus handling
+ */
+unsigned int i2c_get_bus_num(void)
+{
+	return i2c_bus_num;
+}
+
+int i2c_set_bus_num(unsigned int bus)
+{
+	if (bus >= CFG_MAX_I2C_BUS)
+		return -1;
+	i2c_bus_num = bus;
+
+	return 0;
+}
+
+/* TODO: add 100/400k switching */
+unsigned int i2c_get_bus_speed(void)
+{
+	return CFG_I2C_SPEED;
+}
+
+int i2c_set_bus_speed(unsigned int speed)
+{
+	if (speed != CFG_I2C_SPEED)
+		return -1;
+
+	return 0;
+}
+#endif
 
 /*-----------------------------------------------------------------------
  * if ack == I2C_ACK, ACK the byte so can continue reading, else
-- 
2.39.5