diff options
| author | Christoph Berliner <caberliner@gmail.com> | 2026-08-21 16:25:11 +0200 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2026-09-21 07:25:20 -0700 |
| commit | 5f465afe43cb29f7b5ebbd160164267f55ce365d (patch) | |
| tree | 7dc62376a27d77c80a6e2c6d1a0c51b1514661b7 /tools/perf/scripts/python/stackcollapse.py | |
| parent | 93f51579e7df248780214094418f205253383cc5 (diff) | |
watchdog: sp5100_tco: allow unreserved MMIO on GA-78LMT-USB3
The Gigabyte GA-78LMT-USB3 firmware programs the legacy SP5100
watchdog MMIO window at 0xfec000f0. This address falls inside the
IOAPIC resource, so sp5100_tco fails to reserve it and aborts probing.
Do not relocate or reprogram the watchdog. Instead, add a narrowly
scoped DMI quirk for this board which permits use of the
firmware-provided MMIO address without reserving it.
The exception is limited to the legacy SP5100 register layout, the
GA-78LMT-USB3 DMI identity, and the firmware address 0xfec000f0.
All other systems retain the existing resource reservation behavior.
On the affected system the watchdog initializes successfully and
/dev/watchdog0 is registered while the firmware-programmed watchdog
base remains unchanged at 0xfec000f0 during load and unload.
Tested on a Gigabyte GA-78LMT-USB3 with AMD SBx00 SMBus controller
(PCI 1002:4385, revision 0x3c).
Signed-off-by: Christoph Berliner <caberliner@gmail.com>
Link: https://patch.msgid.link/20260821142511.49934-1-caberliner@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions