On Fri, Oct 28, 2022 at 11:55:16PM +0100, Paul Cercueil wrote: > The RTC in the JZ4770 is compatible with the JZ4760, but has an extra > register that permits to configure the behaviour of the CLK32K pin. The > same goes for the RTC in the JZ4780. > > Therefore, the ingenic,jz4770-rtc and ingenic,jz4780-rtc strings do not > fall back anymore to ingenic,jz4760-rtc. The ingenic,jz4780-rtc string > now falls back to the ingenic,jz4770-rtc string. This is a compatibility mess. There is no driver support in v6.1-rc for ingenic,jz4770-rtc, so a new DT would not work with existing kernels. It sounds like you need 3 compatibles for 4780. > > Additionally, since the RTCs in the JZ4770 and JZ4780 support outputting > the input oscillator's clock to the CLK32K pin, the RTC node is now also > a clock provider on these SoCs, so a #clock-cells property is added. > > Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx> > --- > > v2: - add constraint on which SoCs can have the #clock-cells property > - add JZ4780 example which has a #clock-cells > > .../devicetree/bindings/rtc/ingenic,rtc.yaml | 32 +++++++++++++++++-- > 1 file changed, 30 insertions(+), 2 deletions(-)
