diff options
Diffstat (limited to 'recipes/linux/linux-2.6.31/pcm043/fix_max7301.patch')
| -rw-r--r-- | recipes/linux/linux-2.6.31/pcm043/fix_max7301.patch | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/recipes/linux/linux-2.6.31/pcm043/fix_max7301.patch b/recipes/linux/linux-2.6.31/pcm043/fix_max7301.patch new file mode 100644 index 0000000000..a6854e1feb --- /dev/null +++ b/recipes/linux/linux-2.6.31/pcm043/fix_max7301.patch @@ -0,0 +1,28 @@ +Fix wrong setting of portconfig register. +mask size is 2bits, so shift must be twice offset +direction input value is 2 + +Signed-off-by: Jan Weitzel <J.Weitzel@phytec.de> +--- +Index: linux-2.6.28/drivers/gpio/max7301.c +=================================================================== +--- linux-2.6.28.orig/drivers/gpio/max7301.c ++++ linux-2.6.28/drivers/gpio/max7301.c +@@ -123,7 +123,7 @@ static int max7301_direction_input(struc + + /* Standard GPIO API doesn't support pull-ups, has to be extended. + * Hard-coding no pollup for now. */ +- *config = (*config & ~(3 << (offset & 3))) | (1 << (offset & 3)); ++ *config = (*config & ~(3 << (2*(offset & 3)))) | (2 << (2*(offset & 3))); + + ret = max7301_write(ts->spi, 0x08 + (offset >> 2), *config); + +@@ -157,7 +157,7 @@ static int max7301_direction_output(stru + + mutex_lock(&ts->lock); + +- *config = (*config & ~(3 << (offset & 3))) | (1 << (offset & 3)); ++ *config = (*config & ~(3 << (2*(offset & 3)))) | (1 << (2*(offset & 3))); + + ret = __max7301_set(ts, offset, value); + |