On Tue, Aug 22, 2017 at 05:05:47PM -0400, Brandon Martin wrote: > Document the DT bindings for the rtc-v3020 driver. MMIO and GPIO > attachment modes are both supported via DT. > > Signed-off-by: Brandon Martin <martinbv@xxxxxxxxxxxxxx> > --- > .../devicetree/bindings/rtc/rtc-v3020.txt | 38 ++++++++++++++++++++++ > 1 file changed, 38 insertions(+) > create mode 100644 Documentation/devicetree/bindings/rtc/rtc-v3020.txt > > diff --git a/Documentation/devicetree/bindings/rtc/rtc-v3020.txt b/Documentation/devicetree/bindings/rtc/rtc-v3020.txt > new file mode 100644 > index 000000000000..8b32e6a79960 > --- /dev/null > +++ b/Documentation/devicetree/bindings/rtc/rtc-v3020.txt > @@ -0,0 +1,38 @@ > + EM Micro v3020 RTC > +~~~~~~~~~~~~~~~~~~~~ > + > +Required properties: > + - compatible : "emmicro,v3020" > + > +Required for MMIO connection: > + - reg : should contain registers location and length. Looking at the datasheet, there's really no such thing. You'd have to have some specialized h/w to generate the serial waveform. > + > +Required for GPIO connection: > +- emmicro,use-gpio > +- cs-gpios, wr-gpios, rd-gpios, io-gpios : specify gpios connected to > + corresponding pins of the RTC > + > +Optional properties: > +- emmicro,mmio-left-shift : data bit to which IO line is connected for MMIO > + connection (defaults to 0) This has come up several times on RTCs (LP8841, DS1302). This really looks like SPI and could probably use the spi-gpio bitbang driver. Rob -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
