Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=24d0fb423ca18adf509dec8a7326c0bdd6653e41
Commit: 24d0fb423ca18adf509dec8a7326c0bdd6653e41
Parent: 08fb68bb4bbc9c5970e4ed4920cb6144a70684cd
Author: David Brownell <[EMAIL PROTECTED]>
AuthorDate: Sat Oct 13 23:56:32 2007 +0200
Committer: Jean Delvare <[EMAIL PROTECTED]>
CommitDate: Sat Oct 13 23:56:32 2007 +0200
i2c-at91: Mark as broken
Mark the i2c-at91 driver BROKEN in Kconfig, and explain just
why it's broken. (Summary: hardware design issues.)
Signed-off-by: David Brownell <[EMAIL PROTECTED]>
Signed-off-by: Jean Delvare <[EMAIL PROTECTED]>
---
drivers/i2c/busses/Kconfig | 10 +++++++++-
1 files changed, 9 insertions(+), 1 deletions(-)
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index a9cab3e..de95c75 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -75,11 +75,19 @@ config I2C_AMD8111
config I2C_AT91
tristate "Atmel AT91 I2C Two-Wire interface (TWI)"
- depends on ARCH_AT91 && EXPERIMENTAL
+ depends on ARCH_AT91 && EXPERIMENTAL && BROKEN
help
This supports the use of the I2C interface on Atmel AT91
processors.
+ This driver is BROKEN because the controller which it uses
+ will easily trigger RX overrun and TX underrun errors. Using
+ low I2C clock rates may partially work around those issues
+ on some systems. Another serious problem is that there is no
+ documented way to issue repeated START conditions, as needed
+ to support combined I2C messages. Use the i2c-gpio driver
+ unless your system can cope with those limitations.
+
config I2C_AU1550
tristate "Au1550/Au1200 SMBus interface"
depends on SOC_AU1550 || SOC_AU1200
-
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