diff mbox series

[2/3] arm64: dts: allwinner: t527: avaota-a1: hook up external 32k crystal

Message ID 20250913102450.3935943-2-wens@kernel.org (mailing list archive)
State New
Headers
Series [1/3] arm64: dts: allwinner: a527: cubie-a5e: Drop external 32.768 KHz crystal |

Commit Message

Chen-Yu Tsai Sept. 13, 2025, 10:24 a.m. UTC 
From: Chen-Yu Tsai <wens@csie.org>

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: dbe54efa32af ("arm64: dts: allwinner: a523: add Avaota-A1 router support")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts b/arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts
index 535387912d9b..054d0357c139 100644
--- a/arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts
+++ b/arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts
@@ -354,6 +354,14 @@  &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>;