[PATCH] arm64: dts: broadcom: bcm2712: Remove non-functional EL2 virtual timer

[Daniel Drake]

Commit d87773de9efe1 ("clocksource/drivers/arm_arch_timer: Default to
EL2 virtual timer when running VHE") causes boot to hang on
Raspberry Pi 5. The newly-selected EL2 virtual timer does not generate
any interrupts, even though the GIC_DIST_ENABLE_SET flag has been
confirmed set via readback.

The reasons for this failure are unknown, however it is likely that
this timer was never tested. Raspberry Pi's original devicetree did
not include this timer interrupt; it was only introduced via a
suggestion[1] made in code review as part of the upstreaming process.
(Current RPi firmware versions do include this timer, but only because
they rebased on top of the upstreamed devicetree starting with
Linux 6.12)

Until more is known about this non-firing timer interrupt, remove
the devicetree entry to enable RPi5 devices to boot.

[1] https://lore.kernel.org/all/12363be5b11c752b7155cc0c416fdfd2@kernel.org/

Reported-by: Marek Szyprowski <m.szyprowski at samsung.com>
Closes: https://lore.kernel.org/all/ea15cce1-b393-43f6-8d58-3d6f90f0c0cd@samsung.com/
Signed-off-by: Daniel Drake <dan at reactivated.net>
---
 arch/arm64/boot/dts/broadcom/bcm2712.dtsi | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/arm64/boot/dts/broadcom/bcm2712.dtsi b/arch/arm64/boot/dts/broadcom/bcm2712.dtsi
index 761c59d90ffc..09ff5e9959d3 100644
--- a/arch/arm64/boot/dts/broadcom/bcm2712.dtsi
+++ b/arch/arm64/boot/dts/broadcom/bcm2712.dtsi
@@ -678,8 +678,6 @@ IRQ_TYPE_LEVEL_LOW)>,
 			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) |
 					  IRQ_TYPE_LEVEL_LOW)>,
 			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) |
-					  IRQ_TYPE_LEVEL_LOW)>,
-			     <GIC_PPI 12 (GIC_CPU_MASK_SIMPLE(4) |
 					  IRQ_TYPE_LEVEL_LOW)>;
 	};
 
-- 
2.54.0