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| author | Vic Yang <victoryang@chromium.org> | 2013-09-10 17:55:02 +0800 |
|---|---|---|
| committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2013-09-11 19:45:38 +0000 |
| commit | eff7a1910a60b1d30b10257fd4a12b5ed1402594 (patch) | |
| tree | d604e3ec704575a5bdbedc7f172ed062586cdf12 /common/util.c | |
| parent | 876d4c0031ce0d277f23eb08760c83b854038064 (diff) | |
| download | chrome-ec-eff7a1910a60b1d30b10257fd4a12b5ed1402594.tar.gz | |
Support multi-bit mask in STM32L's GPIO functions
The definition of GPIO interface allows passing in multi-bit mask, and
this is what's done by gpio_config_module(). Fix STM32L's function so
that it doesn't accidentally set incorrect GPIO register values.
BUG=chrome-os-partner:22605
TEST=On Kirby, do 'led r 0' and check the value of 0x40020800 is
0x01540000.
BRANCH=None
Change-Id: I9a1c8074aab7345485a590ecf138bf99d0742997
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/168739
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Tested-by: Randall Spangler <rspangler@chromium.org>
Diffstat (limited to 'common/util.c')
| -rw-r--r-- | common/util.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/common/util.c b/common/util.c index 0d7bff2710..f120cdad24 100644 --- a/common/util.c +++ b/common/util.c @@ -273,6 +273,13 @@ int uint64divmod(uint64_t *n, int d) return r; } +int get_next_bit(uint32_t *mask) +{ + int bit = 31 - __builtin_clz(*mask); + *mask &= ~(1 << bit); + return bit; +} + /****************************************************************************/ /* stateful conditional stuff */ |