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arm64: dts: allwinner: t527: orangepi-4a: hook up external 32k crystal

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[ Upstream commit bd1ce7ef6a ]

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: de713ccb99 ("arm64: dts: allwinner: t527: Add OrangePi 4A board")
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://patch.msgid.link/20250913102450.3935943-3-wens@kernel.org
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chen-Yu Tsai
2025-09-13 18:24:50 +08:00
committed by Greg Kroah-Hartman
parent ad8b40851e
commit ce8f43034b
1 changed files with 8 additions and 0 deletions
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8
arch/arm64/boot/dts/allwinner/sun55i-t527-orangepi-4a.dts
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@@ -346,6 +346,14 @@
vcc-pm-supply = <&reg_bldo2>;
};
&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>;