This is a note to let you know that I've just added the patch titled
ARM: dts: stm32: Add arm,no-tick-in-suspend to STM32MP15xx STGEN timer
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-dts-stm32-add-arm-no-tick-in-suspend-to-stm32mp1.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 91cf4a1005bc5b861f35768a1435096e9a47b4bc
Author: Marek Vasut <marex@xxxxxxx>
Date: Mon May 13 23:58:15 2024 +0200
ARM: dts: stm32: Add arm,no-tick-in-suspend to STM32MP15xx STGEN timer
[ Upstream commit 4306c047415a227bc72f0e7ba9bde1ccdac10435 ]
STM32MP15xx RM0436 Rev 6 section 46.3 System timer generator (STGEN) states
"
Arm recommends that the system counter is in an always-on power domain.
This is not supported in the current implementation, therefore STGEN should
be saved and restored before Standby mode entry, and restored at Standby
exit by secure software.
...
"
Instead of piling up workarounds in the firmware which is difficult to
update, add "arm,no-tick-in-suspend" DT property into the timer node to
indicate the timer is stopped in suspend, and let the kernel fix the
timer up.
Fixes: 8471a20253eb ("ARM: dts: stm32: add stm32mp157c initial support")
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Signed-off-by: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/arm/boot/dts/st/stm32mp151.dtsi b/arch/arm/boot/dts/st/stm32mp151.dtsi
index 61508917521c3..aec7fa5ab5d8c 100644
--- a/arch/arm/boot/dts/st/stm32mp151.dtsi
+++ b/arch/arm/boot/dts/st/stm32mp151.dtsi
@@ -50,6 +50,7 @@ timer {
<GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(1) | IRQ_TYPE_LEVEL_LOW)>,
<GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(1) | IRQ_TYPE_LEVEL_LOW)>;
interrupt-parent = <&intc>;
+ arm,no-tick-in-suspend;
};
clocks {
