Extend the pwm-beeper driver to support customized frequency for SND_BELL
from device properties.
Signed-off-by: NGuan Ben <ben.guan@cn.bosch.com>
Signed-off-by: NMark Jonas <mark.jonas@de.bosch.com>
Signed-off-by: NHeiko Schocher <hs@denx.de>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>