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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090321133848.11905.59350.stgit@localhost \
--to=jonsmirl@gmail.com \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.