From 09ee951617d9af8a86d228b2ed34035076ab6001 Mon Sep 17 00:00:00 2001 From: Martin Blumenstingl Date: Sat, 13 Apr 2019 18:34:23 +0200 Subject: [PATCH] ARM: dts: meson8b: odroid-c1: prepare support for the RTC 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 Signed-off-by: Kevin Hilman --- 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 0157646e3a895..f3ad9397f6709 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>; -- 2.30.2