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mb/asrock/b75pro3-m: Drop destructive GPIO settings 

Without setting these GPIO bits, you /can/ power on your board after
powering it down again.  This includes after cutting the power.
The only way to recover from this is to pull the CMOS battery and cut
the power for 15mins.  Then make sure you don't do this GPIO trickery or
you end up with the same state of basically an unresponsive "dead"
mainboard.  So flash the chip before you pull the battery.

One small workaround I found when you like to flash from the system, is
to press the power button with 1 second after you enable power to the
board.  In this small timeframe, apparently the superio chip didn't
intialise/restore/gets set with the settings that make it never want to
power on again.  The other workaround is to connect the appriopriate
pins on the ATX power connector to force power to the mainboard.

Signed-off-by: Fabian Groffen <grobian@gentoo.org>
Change-Id: I4c9df200ba3ec5f315ad3d184588551d29fa68ce
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75212
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
This commit is contained in:
Fabian Groffen 2023-05-13 22:21:48 +02:00 committed by Matt DeVillier
parent eb23fbeab0
commit 6230d26ad1
1 changed files with 0 additions and 16 deletions
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16
src/mainboard/asrock/b75pro3-m/devicetree.cb
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@ -111,28 +111,12 @@ chip northbridge/intel/sandybridge
end
device pnp 2e.6 off end # CIR
device pnp 2e.7 off end # GPIO8
device pnp 2e.107 off end # GPIO9
device pnp 2e.8 off end # WDT1
device pnp 2e.108 off end # GPIO0
device pnp 2e.208 off end # GPIOA
device pnp 2e.308 on # GPIO base
io 0x60 = 0x0
irq 0xf0 = 0x3e # + GPIO1 direction
irq 0xf1 = 0xde # + GPIO1 value
end
device pnp 2e.109 on end # GPIO1
device pnp 2e.209 on # GPIO2
irq 0xe0 = 0xff # + GPIO2 direction
irq 0xe1 = 0x0c # + GPIO2 value
end
device pnp 2e.309 on # GPIO3
irq 0xe4 = 0xf7 # + GPIO3 direction
irq 0xe5 = 0x08 # + GPIO3 value
end
device pnp 2e.409 off end # GPIO4
device pnp 2e.509 off end # GPIO5
device pnp 2e.609 off end # GPIO6
device pnp 2e.709 on end # GPIO7
device pnp 2e.a on # ACPI
irq 0xe0 = 0x01
irq 0xe3 = 0x14