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authorStefan Roese <sr@denx.de>2010-03-29 15:30:46 +0200
committerStefan Roese <sr@denx.de>2010-03-30 13:05:05 +0200
commit1a332da61df9c38b567359af114daeaaaefaead8 (patch)
treee1e00a5055162beab62f14b4a2b7e3016eeef333
parent060f28532b09dd3d2c78423bdd809ac768a27629 (diff)
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ppc4xx: Fix problem with I2C bus >= 1 initialization
This patch fixes a problem introduced with patch eb5eb2b0 [ppc4xx: Cleanup PPC4xx I2C infrastructure]. We need to assign the I2C base address to the "i2c" pointer inside of the controller loop. Otherwise controller 0 is initialized multiple times instead of initializing each I2C controller sequentially. Tested on Katmai. Signed-off-by: Stefan Roese <sr@denx.de> Acked-by: Heiko Schocher <hs@denx.de>
-rw-r--r--cpu/ppc4xx/i2c.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/cpu/ppc4xx/i2c.c b/cpu/ppc4xx/i2c.c
index 7976e75..9b86187 100644
--- a/cpu/ppc4xx/i2c.c
+++ b/cpu/ppc4xx/i2c.c
@@ -93,7 +93,7 @@ static void _i2c_bus_reset(void)
void i2c_init(int speed, int slaveaddr)
{
- struct ppc4xx_i2c *i2c = (struct ppc4xx_i2c *)I2C_BASE_ADDR;
+ struct ppc4xx_i2c *i2c;
int val, divisor;
int bus;
@@ -109,6 +109,9 @@ void i2c_init(int speed, int slaveaddr)
for (bus = 0; bus < CONFIG_SYS_MAX_I2C_BUS; bus++) {
I2C_SET_BUS(bus);
+ /* Set i2c pointer after calling I2C_SET_BUS() */
+ i2c = (struct ppc4xx_i2c *)I2C_BASE_ADDR;
+
/* Handle possible failed I2C state */
/* FIXME: put this into i2c_init_board()? */
_i2c_bus_reset();