From: Jon <jonsmirl@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 3/3] mpc5200: make i2c faster
Date: Sat, 21 Mar 2009 09:38:48 -0400 [thread overview]
Message-ID: <20090321133848.11905.59350.stgit@localhost> (raw)
In-Reply-To: <20090321133727.11905.38048.stgit@localhost>
From: Sascha Hauer <s.hauer@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@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);
}
next prev parent reply other threads:[~2009-03-21 13:38 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-21 13:38 [U-Boot] [PATCH 0/3] Three mpc5200 patches from Pengutronix.de Jon
2009-03-21 13:38 ` [U-Boot] [PATCH 1/3] mpc5200: do not use printf in i2c_init() Jon
2009-03-21 19:47 ` Wolfgang Denk
2009-03-21 20:39 ` Jon Smirl
2009-03-21 20:54 ` Wolfgang Denk
2009-03-21 20:56 ` Wolfgang Denk
2009-03-22 14:01 ` Jon Smirl
2009-03-22 14:21 ` Wolfgang Denk
2009-03-22 14:23 ` Jon Smirl
2009-03-22 15:23 ` Wolfgang Denk
2009-03-23 2:55 ` Jon Smirl
2009-03-24 8:38 ` Heiko Schocher
2009-03-25 21:51 ` Wolfgang Denk
2009-03-25 22:31 ` Jon Smirl
2009-03-21 13:38 ` [U-Boot] [PATCH 2/3] mpc52xx phy: initialize only when needed Jon
2009-03-25 19:12 ` Jon Smirl
2009-03-25 21:53 ` Wolfgang Denk
2009-03-31 1:04 ` Jon Smirl
2009-03-31 6:13 ` Ben Warren
2009-04-04 20:37 ` Wolfgang Denk
2009-03-21 13:38 ` Jon [this message]
2009-03-21 19:48 ` [U-Boot] [PATCH 3/3] mpc5200: make i2c faster Wolfgang Denk
2009-03-22 14:20 ` Jon Smirl
2009-03-22 15:21 ` Wolfgang Denk
2009-03-23 2:59 ` Jon Smirl
2009-03-23 8:24 ` Wolfgang Denk
2009-03-22 23:16 ` Sascha Hauer
2009-03-23 3:00 ` Grant Likely
2009-03-23 6:24 ` Wolfgang Denk
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