diff options
| author | Michał Żygowski <michal.zygowski@3mdeb.com> | 2021-11-25 21:49:28 +0100 |
|---|---|---|
| committer | Michał Żygowski <michal.zygowski@3mdeb.com> | 2021-11-27 14:23:08 +0000 |
| commit | 5aba2aeead1aba0484ec55d5cd2a13146bd8068e (patch) | |
| tree | 95466e40135df5ea39e80ab470be395bbecf0578 | |
| parent | 3b1d1ce1af684f5a94376a023980d6d94cb7972a (diff) | |
superio/smsc/sch5545: Disable PS/2 lines isolation during init
Disable PS/2 data and clock isolation in order to properly initialize
the PS/2 keyboard and mouse in payload/OS. These bits are set by OS via
ACPI and can survive S5 state. It is necessary to clear them after an
ungraceful shutdown in order to perform PS/2 controller initialization
e.g. in SeaBIOS.
TEST=PS/2 keyboard can always be successfully initialized in SeaBIOS
on Dell OptiPlex 9010
Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: Iac6be095c996b357b5d4e8d75199f94a89bf73e9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59673
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
| -rw-r--r-- | src/superio/smsc/sch5545/superio.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/superio/smsc/sch5545/superio.c b/src/superio/smsc/sch5545/superio.c index b6e5308f3c..2fe5d035bf 100644 --- a/src/superio/smsc/sch5545/superio.c +++ b/src/superio/smsc/sch5545/superio.c @@ -62,6 +62,12 @@ static void sch5545_init(struct device *dev) switch (dev->path.pnp.device) { case SCH5545_LDN_KBC: + pnp_enter_conf_mode(dev); + pnp_set_logical_device(dev); + /* Disable PS/2 clock and data isolation */ + pnp_unset_and_set_config(dev, 0xf0, + SCH5545_KBD_ISOLATION | SCH5545_MOUSE_ISOLATION, 0); + pnp_exit_conf_mode(dev); pc_keyboard_init(NO_AUX_DEVICE); break; case SCH5545_LDN_LPC: |