The haptic motor for the Librem 5 uses this.
Signed-off-by: NGuido Günther <agx@sigxcpu.org>
Signed-off-by: NMartin Kepplinger <martin.kepplinger@puri.sm>
Reviewed-by: NKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>