The patch titled
I2C PCA954x: Fix initial access to first mux/switch port
has been added to the -mm tree. Its filename is
i2c-pca954x-fix-initial-access-to-first-mux-switch-port.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
From: Kumar Gala <galak@xxxxxxxxxxxxxxxxxxx>
The first mux/switch port would not get selected if it was the first port
to be accessed because the code believed it already had. We now initialize
the last channel to a bogus value to ensure the first access will properly
select the channel.
Signed-off-by: Kumar Gala <galak@xxxxxxxxxxxxxxxxxxx>
Cc: Jean Delvare <khali@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/i2c/chips/pca954x.c | 4 ++++
1 files changed, 4 insertions(+)
diff -puN drivers/i2c/chips/pca954x.c~i2c-pca954x-fix-initial-access-to-first-mux-switch-port drivers/i2c/chips/pca954x.c
--- 25/drivers/i2c/chips/pca954x.c~i2c-pca954x-fix-initial-access-to-first-mux-switch-port Wed Apr 26 14:26:41 2006
+++ 25-akpm/drivers/i2c/chips/pca954x.c Wed Apr 26 14:26:41 2006
@@ -234,6 +234,10 @@ static int pca954x_detect(struct i2c_ada
data->chip_offset = i;
+ /* Set last_chan to an invalid channel to force an initial setting
+ * of the mux/switch on the first select_chan */
+ data->last_chan = 0xff;
+
if ((ret = i2c_attach_client(client)))
goto exit_free;
_
Patches currently in -mm which might be from galak@xxxxxxxxxxxxxxxxxxx are
origin.patch
spi-added-spi-master-driver-for.patch
i2c-add-support-for-virtual-i2c-adapters.patch
i2c-pca954x-i2c-mux-driver.patch
i2c-mpc-fix-up-error-handling.patch
i2c-pca954x-fix-initial-access-to-first-mux-switch-port.patch
git-powerpc.patch
pci-pci-64-bit-resources-arch-changes-update.patch
-
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