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arm64: dts: allwinner: t527: avaota-a1: hook up external 32k crystal

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When the board was added, its external 32.768 KHz crystal was described
but not hooked up correctly. This meant the device had to fall back to
the SoC's internal oscillator or divide a 32 KHz clock from the main
oscillator, neither of which are accurate for the RTC. As a result the
RTC clock will drift badly.

Hook the crystal up to the RTC block and request the correct clock rate.

Fixes: dbe54efa32 ("arm64: dts: allwinner: a523: add Avaota-A1 router support")
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://patch.msgid.link/20250913102450.3935943-2-wens@kernel.org
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
This commit is contained in:
Chen-Yu Tsai 2025-09-13 18:24:49 +08:00
parent 9f01e1e14e
commit 3d5e1ba00a
1 changed files with 8 additions and 0 deletions
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8
arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts
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@ -309,6 +309,14 @@ &r_pio {
vcc-pm-supply = <&reg_aldo3>;
};
&rtc {
clocks = <&r_ccu CLK_BUS_R_RTC>, <&osc24M>,
<&r_ccu CLK_R_AHB>, <&ext_osc32k>;
clock-names = "bus", "hosc", "ahb", "ext-osc32k";
assigned-clocks = <&rtc CLK_OSC32K>;
assigned-clock-rates = <32768>;
};
&uart0 {
pinctrl-names = "default";
pinctrl-0 = <&uart0_pb_pins>;