| Message ID | 20190413163423.15149-4-martin.blumenstingl@googlemail.com (mailing list archive) |
|---|---|
| State | Mainlined |
| Commit | 09ee951617d9af8a86d228b2ed34035076ab6001 |
| Headers | show |
| Series | Meson8b: add support for the RTC on EC-100 and Odroid-C1 | expand |
Martin Blumenstingl <martin.blumenstingl@googlemail.com> writes: > The Odroid-C1 has the 32.768 kHz oscillator (X3 in the schematics) which > is required for the RTC. A battery can be connected separately (to the > BT1 header) - then the "rtc" node can be enabled manually. By default > the RTC is disabled because the boards typically come without the RTC > battery. > > Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> > --- > arch/arm/boot/dts/meson8b-odroidc1.dts | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/arch/arm/boot/dts/meson8b-odroidc1.dts b/arch/arm/boot/dts/meson8b-odroidc1.dts > index 0157646e3a89..f3ad9397f670 100644 > --- a/arch/arm/boot/dts/meson8b-odroidc1.dts > +++ b/arch/arm/boot/dts/meson8b-odroidc1.dts > @@ -124,6 +124,14 @@ > io-channels = <&saradc 8>; > }; > > + rtc32k_xtal: rtc32k-xtal-clk { > + /* X3 in the schematics */ Always nice to see the names from the schematics. Thanks! Kevin
diff --git a/arch/arm/boot/dts/meson8b-odroidc1.dts b/arch/arm/boot/dts/meson8b-odroidc1.dts index 0157646e3a89..f3ad9397f670 100644 --- a/arch/arm/boot/dts/meson8b-odroidc1.dts +++ b/arch/arm/boot/dts/meson8b-odroidc1.dts @@ -124,6 +124,14 @@ io-channels = <&saradc 8>; }; + rtc32k_xtal: rtc32k-xtal-clk { + /* X3 in the schematics */ + compatible = "fixed-clock"; + clock-frequency = <32768>; + clock-output-names = "RTC32K"; + #clock-cells = <0>; + }; + vcc_1v8: regulator-vcc-1v8 { /* * RICHTEK RT9179 configured for a fixed output voltage of @@ -345,6 +353,12 @@ clock-names = "clkin0"; }; +&rtc { + /* needs to be enabled manually when a battery is connected */ + clocks = <&rtc32k_xtal>; + vdd-supply = <&vdd_rtc>; +}; + &uart_AO { status = "okay"; pinctrl-0 = <&uart_ao_a_pins>;
The Odroid-C1 has the 32.768 kHz oscillator (X3 in the schematics) which is required for the RTC. A battery can be connected separately (to the BT1 header) - then the "rtc" node can be enabled manually. By default the RTC is disabled because the boards typically come without the RTC battery. Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> --- arch/arm/boot/dts/meson8b-odroidc1.dts | 14 ++++++++++++++ 1 file changed, 14 insertions(+)