On 15/01/2019 21:02, Uwe Kleine-König wrote: > Hello, > > On Mon, Jan 14, 2019 at 04:21:22PM +0800, Ryder Lee wrote: >> This adds a property "mediatek,num-pwms" for PWM controller. >> >> Signed-off-by: Ryder Lee <ryder.lee@xxxxxxxxxxxx> >> --- >> arch/arm64/boot/dts/mediatek/mt7622.dtsi | 1 + >> 1 file changed, 1 insertion(+) >> >> diff --git a/arch/arm64/boot/dts/mediatek/mt7622.dtsi b/arch/arm64/boot/dts/mediatek/mt7622.dtsi >> index 8fc4aa7..ab016cf 100644 >> --- a/arch/arm64/boot/dts/mediatek/mt7622.dtsi >> +++ b/arch/arm64/boot/dts/mediatek/mt7622.dtsi >> @@ -436,6 +436,7 @@ >> <&pericfg CLK_PERI_PWM6_PD>; >> clock-names = "top", "main", "pwm1", "pwm2", "pwm3", "pwm4", >> "pwm5", "pwm6"; >> + mediatek,num-pwms = <6>; >> status = "disabled"; > > Conceptually this patch must go in before the change to the driver. > Otherwise the pwms are not usable with only patch 1 applied which breaks > bisectability. > The driver should have backwards compatibility to older DTs. So that would need to be fixed in the driver not in the patch order of the series. Regards, Matthias