diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/gpiolib.h | 4 | ||||
| -rw-r--r-- | src/lib/tristate_gpios.c | 2 | ||||
| -rw-r--r-- | src/mainboard/google/storm/boardid.c | 2 |
3 files changed, 6 insertions, 2 deletions
diff --git a/src/include/gpiolib.h b/src/include/gpiolib.h index 850a661559..436f26ac04 100644 --- a/src/include/gpiolib.h +++ b/src/include/gpiolib.h @@ -31,6 +31,10 @@ typedef unsigned gpio_t; * bit fields, each representing one GPIO value, or a number where each GPIO is * included multiplied by 3^gpio_num, resulting in a true tertiary value. * + * gpio[]: pin positions to read. little-endian (less significant value first). + * num_gpio: number of pins to read. + * tertiary: 1: pins are interpreted as a quad coded tertiary. + * 0: pins are interpreted as a set of two bit fields. */ int gpio_get_in_tristate_values(gpio_t gpio[], int num_gpio, int tertiary); diff --git a/src/lib/tristate_gpios.c b/src/lib/tristate_gpios.c index 49f060c9c2..8e93e3704a 100644 --- a/src/lib/tristate_gpios.c +++ b/src/lib/tristate_gpios.c @@ -62,7 +62,7 @@ int gpio_get_in_tristate_values(gpio_t gpio[], int num_gpio, int tertiary) * 1: pull up * 2: floating */ - for (index = 0; index < num_gpio; ++index) { + for (index = num_gpio - 1; index >= 0; --index) { if (tertiary) id *= 3; else diff --git a/src/mainboard/google/storm/boardid.c b/src/mainboard/google/storm/boardid.c index c4a1af3da8..6d7a918088 100644 --- a/src/mainboard/google/storm/boardid.c +++ b/src/mainboard/google/storm/boardid.c @@ -40,7 +40,7 @@ uint8_t board_id(void) { uint8_t bid; - gpio_t hw_rev_gpios[] = {68, 30, 29}; + gpio_t hw_rev_gpios[] = {29, 30, 68}; int offset = 19; bid = gpio_get_in_tristate_values(hw_rev_gpios, |