ARM: dts: meson8b: ec100: enable the RTC

The RTC is always enabled on this board since the battery is already
connected in the factory.
According to the schematics the VCC_RTC regulator (which is either
powered by the internal 3.3V or a battery) is connected to the 0.9V
RTC_VDD input of the SoCs.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

diff --git a/arch/arm/boot/dts/meson8b-ec100.dts b/arch/arm/boot/dts/meson8b-ec100.dts
index 3ca9638..9bf4249 100644 (file)
--- a/arch/arm/boot/dts/meson8b-ec100.dts
+++ b/arch/arm/boot/dts/meson8b-ec100.dts
@@ -88,6 +88,14 @@
                };
        };
 
+       rtc32k_xtal: rtc32k-xtal-clk {
+               /* X2 in the schematics */
+               compatible = "fixed-clock";
+               clock-frequency = <32768>;
+               clock-output-names = "RTC32K";
+               #clock-cells = <0>;
+       };
+
        usb_vbus: regulator-usb-vbus {
                /*
                 * Silergy SY6288CCAC-GP 2A Power Distribution Switch.
@@ -347,6 +355,12 @@
        clock-names = "clkin0";
 };
 
+&rtc {
+       status = "okay";
+       clocks = <&rtc32k_xtal>;
+       vdd-supply = <&vcc_rtc>;
+};
+
 /* exposed through the pin headers labeled "URDUG1" on the top of the PCB */
 &uart_AO {
        status = "okay";