Hi Jerome,
Thanks for your review comments.
On Thu, 16 Jul 2020 at 13:38, Jerome Brunet <jbrunet@xxxxxxxxxxxx> wrote:
>
>
> On Wed 15 Jul 2020 at 18:02, Anand Moon <linux.amoon@xxxxxxxxx> wrote:
>
> > Enable RTC PCF8563 node on Odroid-N2 SBC, In order
> > to support the RTC wakealarm feature for suspend and resume.
> >
> > Cc: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
> > Cc: Kevin Hilman <khilman@xxxxxxxxxxxx>
> > Signed-off-by: Anand Moon <linux.amoon@xxxxxxxxx>
> > ---
> > $ sudo hwclock -r && date
> > 2020-07-15 13:11:53.862508+00:00
> > Wed Jul 15 13:11:54 UTC 2020
> >
> > $ hwclock --show
> > 2020-07-15 13:17:30.903300+00:00
> >
> > But RTC wake up is not working at my end.
> > Any inputs are welcome.
> >
> > $ time rtcwake -s 30 -m mem
> > rtcwake: /dev/rtc0 not enabled for wakeup events
> >
> > real 0m0.002s
> > user 0m0.002s
> > sys 0m0.000s
> > ---
> > .../boot/dts/amlogic/meson-g12b-odroid-n2.dts | 14 ++++++++++++++
> > 1 file changed, 14 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
> > index 169ea283d4ee..a447cba4dd53 100644
> > --- a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
> > +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
> > @@ -391,6 +391,20 @@ hdmi_tx_tmds_out: endpoint {
> > };
> > };
> >
> > +&i2c3 {
> > + pinctrl-0 = <&i2c3_sda_a_pins>, <&i2c3_sck_a_pins>;
> > + pinctrl-names = "default";
> > + status = "okay";
> > +
> > + rtc: rtc@51 {
> > + reg = <0x51>;
> > + compatible = "nxp,pcf8563";
> > + #clock-cells = <0>;
> > + clock-frequency = <32768>;
> > + clock-output-names = "rtc_clkout";
> > + };
>
> This rtc being on a connector, optional and not fitted by default,
> should it really be enabled for all odroid-n2 ?
>
> We tend not do that usually
My thought process was there will be an Internal primary interrupt pin
that handles
RTC wakeup and is connected to the CPU and IO peripherals..
-Anand
