From: Chen-Yu Tsai Date: Sat, 13 Sep 2025 10:24:50 +0000 (+0800) Subject: arm64: dts: allwinner: t527: orangepi-4a: hook up external 32k crystal X-Git-Tag: v6.18-rc1~147^2~13^2~1 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bd1ce7ef6aef4ee7349eb3124166e712693650ce;p=thirdparty%2Fkernel%2Fstable.git arm64: dts: allwinner: t527: orangepi-4a: hook up external 32k crystal 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: de713ccb9934 ("arm64: dts: allwinner: t527: Add OrangePi 4A board") Acked-by: Jernej Skrabec Link: https://patch.msgid.link/20250913102450.3935943-3-wens@kernel.org Signed-off-by: Chen-Yu Tsai --- diff --git a/arch/arm64/boot/dts/allwinner/sun55i-t527-orangepi-4a.dts b/arch/arm64/boot/dts/allwinner/sun55i-t527-orangepi-4a.dts index d07bb9193b438..b5483bd7b8d5d 100644 --- a/arch/arm64/boot/dts/allwinner/sun55i-t527-orangepi-4a.dts +++ b/arch/arm64/boot/dts/allwinner/sun55i-t527-orangepi-4a.dts @@ -346,6 +346,14 @@ vcc-pm-supply = <®_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>;