From 09d318a8bb1444ec92e31cafcdba877eb9409e58 Mon Sep 17 00:00:00 2001
From: Kumar Gala <galak@kernel.crashing.org>
Date: Tue, 29 Jul 2008 12:23:49 -0500
Subject: [PATCH] fsl_i2c: Use timebase timer functions instead of get_timer()
The current implementation of get_timer() is only really useful after we
have relocated u-boot to memory. The i2c code is used before that as part
of the SPD DDR setup.
We actually have a bug when using the get_timer() code before relocation
because the .bss hasn't been setup and thus we could be reading/writing
a random location (probably in flash).
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
drivers/i2c/fsl_i2c.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/i2c/fsl_i2c.c b/drivers/i2c/fsl_i2c.c
index 9d5df8ad2f..3f78e2f5c8 100644
--- a/drivers/i2c/fsl_i2c.c
+++ b/drivers/i2c/fsl_i2c.c
@@ -173,12 +173,11 @@ i2c_init(int speed, int slaveadd)
static __inline__ int
i2c_wait4bus(void)
{
- ulong timeval = get_timer(0);
+ unsigned long long timeval = get_ticks();
while (readb(&i2c_dev[i2c_bus_num]->sr) & I2C_SR_MBB) {
- if (get_timer(timeval) > I2C_TIMEOUT) {
+ if ((get_ticks() - timeval) > usec2ticks(I2C_TIMEOUT))
return -1;
- }
}
return 0;
@@ -188,7 +187,7 @@ static __inline__ int
i2c_wait(int write)
{
u32 csr;
- ulong timeval = get_timer(0);
+ unsigned long long timeval = get_ticks();
do {
csr = readb(&i2c_dev[i2c_bus_num]->sr);
@@ -213,7 +212,7 @@ i2c_wait(int write)
}
return 0;
- } while (get_timer (timeval) < I2C_TIMEOUT);
+ } while ((get_ticks() - timeval) < usec2ticks(I2C_TIMEOUT));
debug("i2c_wait: timed out\n");
return -1;
--
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