diff options
| author | Samuel Holland <samuel@sholland.org> | 2020-08-09 05:18:22 +0300 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2020-08-18 12:09:30 +0300 |
| commit | a371b1bdf2b85840de7e3267eaedef9a585541c0 (patch) | |
| tree | e1bf062e99bf95e3aee35ece39d0a0cd5309f237 | |
| parent | 7db1aa6ff9811b4ba24814d8eb40b21555ca0492 (diff) | |
| download | linux-a371b1bdf2b85840de7e3267eaedef9a585541c0.tar.xz | |
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 <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20200809021822.5285-1-samuel@sholland.org
| -rw-r--r-- | arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 1 | ||||
| -rw-r--r-- | arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi | 1 | ||||
| -rw-r--r-- | arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 1 |
3 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi index 73e9b7345257..cf379e38b3a0 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 = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>, <GIC_PPI 14 diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi index 6735e316a39c..6a7b72708d74 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi +++ b/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi @@ -67,6 +67,7 @@ timer { compatible = "arm,armv8-timer"; + arm,no-tick-in-suspend; interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>, <GIC_PPI 14 diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi index 9ce78a7b117d..28c77d6872f6 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi +++ b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi @@ -90,6 +90,7 @@ timer { compatible = "arm,armv8-timer"; + arm,no-tick-in-suspend; interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>, <GIC_PPI 14 |