From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: linux-amlogic@lists.infradead.org, khilman@baylibre.com
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
jianxin.pan@amlogic.com, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, ccaione@baylibre.com
Subject: [PATCH 3/3] ARM: dts: meson8b: odroid-c1: prepare support for the RTC
Date: Sat, 13 Apr 2019 18:34:23 +0200 [thread overview]
Message-ID: <20190413163423.15149-4-martin.blumenstingl@googlemail.com> (raw)
In-Reply-To: <20190413163423.15149-1-martin.blumenstingl@googlemail.com>
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 */
+ 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>;
--
2.21.0
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next prev parent reply other threads:[~2019-04-13 16:37 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-13 16:34 [PATCH 0/3] Meson8b: add support for the RTC on EC-100 and Odroid-C1 Martin Blumenstingl
2019-04-13 16:34 ` [PATCH 1/3] ARM: dts: meson: add support for the RTC Martin Blumenstingl
2019-04-13 16:34 ` [PATCH 2/3] ARM: dts: meson8b: ec100: enable " Martin Blumenstingl
2019-04-13 16:34 ` Martin Blumenstingl [this message]
2019-04-16 19:00 ` [PATCH 3/3] ARM: dts: meson8b: odroid-c1: prepare support for " Kevin Hilman
2019-04-16 19:01 ` [PATCH 0/3] Meson8b: add support for the RTC on EC-100 and Odroid-C1 Kevin Hilman
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