| commit | 1d5b4c0fa9ff79a4f01e5efc1caefd16b190a3dc | |
| author | Peter Korsgaard <jacmet@sunsite.dk> | |
| Wed, 22 Sep 2010 20:29:59 +0000 (22 21:29 +0100) | ||
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | |
| Thu, 23 Sep 2010 14:08:48 +0000 (23 15:08 +0100) | ||
| tree | 3d6650d378615d829d0f89e15755a0c95228a7e3 | treesnapshot (tar.gz zip) |
| parent | 94bf27586631d32ed08dd49eeaa77222b7874cf3 | commitdiff |
ARM: 6406/1: at91sam9g45: fix i2c bus speed
Use a correct udelay value to get bus speed around 100KHz. The udelay
value was most likely copied from the older devices, but the 9g45
is signicantly faster (400MHz, DDR, ..), so a udelay of 2 gives a
bus speed of around 190KHz, which is too fast for some devices.
A udelay value of 5 gives a bus speed of around 90KHz here.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Use a correct udelay value to get bus speed around 100KHz. The udelay
value was most likely copied from the older devices, but the 9g45
is signicantly faster (400MHz, DDR, ..), so a udelay of 2 gives a
bus speed of around 190KHz, which is too fast for some devices.
A udelay value of 5 gives a bus speed of around 90KHz here.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| arch/arm/mach-at91/at91sam9g45_devices.c | diffblobblamehistory |