summaryrefslogtreecommitdiff
path: root/drivers/i2c/soft_i2c.c
diff options
context:
space:
mode:
authorHeiko Schocher <hs@denx.de>2008-10-15 09:34:45 +0200
committerWolfgang Denk <wd@denx.de>2008-10-18 21:54:01 +0200
commit799b784aa00cb03a352847ab9f9acdde79b72d21 (patch)
treeb5f312814dbc1a8a30bdeec41c06dd793f70a69d /drivers/i2c/soft_i2c.c
parent0809ea2f4340ab2047400c7d3d3047f97987d0fd (diff)
downloadu-boot-imx-799b784aa00cb03a352847ab9f9acdde79b72d21.zip
u-boot-imx-799b784aa00cb03a352847ab9f9acdde79b72d21.tar.gz
u-boot-imx-799b784aa00cb03a352847ab9f9acdde79b72d21.tar.bz2
i2c: add CONFIG_I2C_MULTI_BUS for soft_i2c and mpc8260 i2c driver.
Signed-off-by: Heiko Schocher <hs@denx.de>
Diffstat (limited to 'drivers/i2c/soft_i2c.c')
-rw-r--r--drivers/i2c/soft_i2c.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/i2c/soft_i2c.c b/drivers/i2c/soft_i2c.c
index 23db2ee..57736da 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