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sio/nuvoton: Add Kconfig for shared PS/2 port

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Introduce HAVE_SHARED_PS2_PORT Kconfig for this Super I/O to have
mainboards indicate if they have one shared PS/2 port on the rear
panel. On these boards (where a Y-cable cannot allow both
keyboard and mouse to work off the same port), if a PS/2 keyboard is
not present, SIO should be configured to swap its role to mouse, to
allow the OS to find and initialize any mouse connected.

Supporting code will come in a separate patch. Idea is to condition
them on this Kconfig.

Change-Id: I156b15c6ba233cbe8b9ba4d2cfbca6836ad7483a
Signed-off-by: Keith Hui <buurin@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82631
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Keith Hui 2024-03-05 19:08:53 -05:00 committed by Martin L Roth
parent a911b75848
commit b498a4c805
1 changed files with 10 additions and 0 deletions
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10
src/superio/nuvoton/common/Kconfig
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@ -11,3 +11,13 @@ config SUPERIO_NUVOTON_COMMON_COM_A
help help
When enabled, the 'nuvoton_enable_serial()' function will unset When enabled, the 'nuvoton_enable_serial()' function will unset
global CR 0x2a bit 7 to route COM A to the GPIO8 pin group. global CR 0x2a bit 7 to route COM A to the GPIO8 pin group.
config HAVE_SHARED_PS2_PORT
bool
depends on SUPERIO_NUVOTON_COMMON_PRE_RAM
help
Select this option if your mainboard has a single PS/2 port for both keyboard and
mouse, and where a Y-cable cannot allow both keyboard and mouse to work off the same
port. This one port usually works for keyboards only. Add the nvram option
"swap_keyboard_and_mouse" to cmos.layout to allow changing this port into a
mouse port.