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arm: dts: aspeed: tyan s8036: Enable kcs interrupts 

When the BIOS is built with kcs interrupts enabled, not enabling
interrupts on the BMC results in very poor IPMI performance.
The other way around (BIOS with interrupts disabled, BMC with
interrupts enabled) doesn't suffer degraded IPMI performance.
Enabling interrupts on the BMC covers both scenarios, and should
be the default.

TESTED: manually verified IPMI performance when BIOS is built with and
without KCS interrupts.

Signed-off-by: Ali El-Haj-Mahmoud <aaelhaj@google.com>
Link: https://lore.kernel.org/r/20230118150030.2079226-1-aaelhaj@google.com
Signed-off-by: Joel Stanley <joel@jms.id.au>
This commit is contained in:
Ali El-Haj-Mahmoud 2023-01-18 10:00:30 -05:00 committed by Joel Stanley
parent c021d9fe41
commit 8803d9438e
1 changed files with 1 additions and 0 deletions
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arch/arm/boot/dts/aspeed-bmc-tyan-s8036.dts
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@ -364,6 +364,7 @@
&kcs3 {
status = "okay";
aspeed,lpc-io-reg = <0xca2>;
aspeed,lpc-interrupts = <1 IRQ_TYPE_LEVEL_HIGH>;
};
/* Enable BMC VGA output to show an early (pre-BIOS) boot screen */