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[16/24] au0828: tune retry interval for i2c interaction

Message ID 1344307634-11673-17-git-send-email-dheitmueller@kernellabs.com (mailing list archive)
State New, archived
Headers show

Commit Message

Devin Heitmueller Aug. 7, 2012, 2:47 a.m. UTC 
Adjust the retry timeout and number of retries to speed up xc5000 firmware
download.  With this change it goes from 4.2 seconds to 2.9.  The net time
waited is pretty much the same, but we just poll more often.

Tested at 250 KHz as well as 30 KHz.

Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
---
 drivers/media/video/au0828/au0828-i2c.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/media/video/au0828/au0828-i2c.c b/drivers/media/video/au0828/au0828-i2c.c
index d454555..3bc76df 100644
--- a/drivers/media/video/au0828/au0828-i2c.c
+++ b/drivers/media/video/au0828/au0828-i2c.c
@@ -33,8 +33,8 @@  static int i2c_scan;
 module_param(i2c_scan, int, 0444);
 MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
 
-#define I2C_WAIT_DELAY 512
-#define I2C_WAIT_RETRY 64
+#define I2C_WAIT_DELAY 25
+#define I2C_WAIT_RETRY 1000
 
 static inline int i2c_slave_did_write_ack(struct i2c_adapter *i2c_adap)
 {