diff options
| -rw-r--r-- | zephyr/shim/src/gpio.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/zephyr/shim/src/gpio.c b/zephyr/shim/src/gpio.c index c21a46c365..08f6d48742 100644 --- a/zephyr/shim/src/gpio.c +++ b/zephyr/shim/src/gpio.c @@ -339,12 +339,17 @@ void gpio_set_flags(enum gpio_signal signal, int flags) void gpio_set_flags_by_mask(uint32_t port, uint32_t mask, uint32_t flags) { - int pin; + const gpio_flags_t zephyr_flags = convert_to_zephyr_flags(flags); - for (pin = 0; pin < 8; pin++) - if (mask & BIT(pin)) - gpio_configure_port_pin(port, pin, - convert_to_zephyr_flags(flags)); + /* Using __builtin_ctz here will guarantee that this loop is as + * performant as the underlying architecture allows it to be. + */ + while (mask != 0) { + int pin = __builtin_ctz(mask); + + gpio_configure_port_pin(port, pin, zephyr_flags); + mask &= ~BIT(pin); + } } int signal_is_gpio(int signal) |