From: Samuel Holland Date: Sun, 9 Aug 2020 02:18:22 +0000 (-0500) Subject: arm64: dts: allwinner: Mark timer as stopped in suspend X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a371b1bdf2b85840de7e3267eaedef9a585541c0;p=linux.git arm64: dts: allwinner: Mark timer as stopped in suspend When possible, system firmware on 64-bit Allwinner platforms disables OSC24M during system suspend. Since this oscillator is the clock source for the ARM architectural timer, this causes the timer to stop counting. Therefore, the ARM architectural timer must not be marked as NONSTOP on these platforms, or the time will be wrong after system resume. Adding the arm,no-tick-in-suspend property forces the kernel to ignore the ARM architectural timer when calculating sleeptime; it falls back to reading the RTC. Note that this only affects deep suspend, not s2idle. Signed-off-by: Samuel Holland Signed-off-by: Maxime Ripard Link: https://lore.kernel.org/r/20200809021822.5285-1-samuel@sholland.org --- diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi index 73e9b73452579..cf379e38b3a03 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi @@ -157,6 +157,7 @@ timer { compatible = "arm,armv8-timer"; allwinner,erratum-unknown1; + arm,no-tick-in-suspend; interrupts = , , ,