ARM: dts: stm32: Add arm,no-tick-in-suspend to STM32MP15xx STGEN timer

BugLink: https://bugs.launchpad.net/bugs/2083196

[ 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: 8471a20253 ("ARM: dts: stm32: add stm32mp157c initial support")
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Portia Stephens <portia.stephens@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>

This commit is contained in:

Marek Vasut

2024-05-13 23:58:15 +02:00

committed by

Mehmet Basaran

parent 839b8f29e4

commit 658b480170

1 changed files with 1 additions and 0 deletions

									
										arch/arm/boot/dts/st/stm32mp151.dtsi
									
		+1
		
												View File
												
				@@ -50,6 +50,7 @@

							     <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 {