[U-Boot] [PATCH 3/3] mpc5200: make i2c faster
Jon
jonsmirl at gmail.com
Sat Mar 21 14:38:48 CET 2009
From: Sascha Hauer <s.hauer at pengutronix.de>
The mpc5xxx i2c driver has great delays while waiting for the chip status.
make the delays smaller and the driver faster.
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
cpu/mpc5xxx/i2c.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/cpu/mpc5xxx/i2c.c b/cpu/mpc5xxx/i2c.c
index 843af9c..41feb1d 100644
--- a/cpu/mpc5xxx/i2c.c
+++ b/cpu/mpc5xxx/i2c.c
@@ -38,7 +38,7 @@ DECLARE_GLOBAL_DATA_PTR;
#error CONFIG_SYS_I2C_MODULE is not properly configured
#endif
-#define I2C_TIMEOUT 100
+#define I2C_TIMEOUT 10000
#define I2C_RETRIES 3
struct mpc5xxx_i2c_tap {
@@ -94,7 +94,7 @@ static int wait_for_bb(void)
mpc_reg_out(®s->mcr, 0, 0);
mpc_reg_out(®s->mcr, I2C_EN, 0);
#endif
- udelay(1000);
+ udelay(1);
status = mpc_reg_in(®s->msr);
}
@@ -109,7 +109,7 @@ static int wait_for_pin(int *status)
*status = mpc_reg_in(®s->msr);
while (timeout-- && !(*status & I2C_IF)) {
- udelay(1000);
+ udelay(1);
*status = mpc_reg_in(®s->msr);
}
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