pwm_get_by_ofw_propidx
return (pwm_get_by_ofw_propidx(consumer, node, "pwms", idx, out_channel));
return (pwm_get_by_ofw_propidx(consumer, node, prop_name, 0, out_channel));
int pwm_get_by_ofw_propidx(device_t consumer, phandle_t node,
rv = pwm_get_by_ofw_propidx(dev, node, "pwms", 0, &sc->channel);