diff options
| 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 /include/util.h | |
| 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 'include/util.h')
| -rw-r--r-- | include/util.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/util.h b/include/util.h index 0408940b35..8ba25c1780 100644 --- a/include/util.h +++ b/include/util.h @@ -101,6 +101,16 @@ int tolower(int c); */ int uint64divmod(uint64_t *v, int by); +/** + * Get-and-clear next bit from mask. + * + * Starts with most significant bit. + * + * @param mask Bitmask to extract next bit from. Must NOT be zero. + * @return bit position (0..31) + */ +int get_next_bit(uint32_t *mask); + /****************************************************************************/ /* Conditional stuff. |