[PATCH 6.18 285/752] ptp: ptp_vmclock: add 'VMCLOCK' to ACPI device match

Sasha Levin
2026-02-28T17:52:06Z

From: David Woodhouse <dwmw@amazon.co.uk>

[ Upstream commit ed4d23ed469ca14d47670c0384f6ae6c4ff060a5 ]

As we finalised the spec, we spotted that vmgenid actually says that the
_HID is supposed to be hypervisor-specific. Although in the 13 years
since the original vmgenid doc was published, nobody seems to have cared
about using _HID to distinguish between implementations on different
hypervisors, and we only ever use the _CID.

For consistency, match the _CID of "VMCLOCK" too.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Babis Chalios <bchalios@amazon.es>
Tested-by: Takahiro Itazuri <itazur@amazon.com>
Link: https://patch.msgid.link/20260130173704.12575-6-itazur@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/ptp/ptp_vmclock.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/ptp/ptp_vmclock.c b/drivers/ptp/ptp_vmclock.c
index b3a83b03d9c14..cbbfc494680c7 100644
--- a/drivers/ptp/ptp_vmclock.c
+++ b/drivers/ptp/ptp_vmclock.c
@@ -591,6 +591,7 @@ static int vmclock_probe(struct platform_device *pdev)

static const struct acpi_device_id vmclock_acpi_ids[] = {
{ "AMZNC10C", 0 },
+ { "VMCLOCK", 0 },
{}
};
MODULE_DEVICE_TABLE(acpi, vmclock_acpi_ids);
--
2.51.0