[PATCHv1 1/3] arm64: dts: meson-g12b-odroid-n2: Enable RTC controller node

[Jerome Brunet]

On Wed 15 Jul 2020 at 18:02, Anand Moon <linux.amoon at gmail.com> 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 at baylibre.com>
> Cc: Kevin Hilman <khilman at baylibre.com>
> Signed-off-by: Anand Moon <linux.amoon at gmail.com>
> ---
> $ 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 at 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

> +};
> +
>  &ir {
>  	status = "okay";
>  	pinctrl-0 = <&remote_input_ao_pins>;