in gpio.c [23:36]
static int mux_gpio_set(struct mux_control *mux, int state)
{
struct mux_gpio *mux_gpio = mux_chip_priv(mux->chip);
DECLARE_BITMAP(values, BITS_PER_TYPE(state));
u32 value = state;
bitmap_from_arr32(values, &value, BITS_PER_TYPE(value));
gpiod_set_array_value_cansleep(mux_gpio->gpios->ndescs,
mux_gpio->gpios->desc,
mux_gpio->gpios->info, values);
return 0;
}