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From: Takahiro Itazuri <itazur@amazon.com>
To: <robh@kernel.org>, <krzk+dt@kernel.org>, <conor+dt@kernel.org>,
	<richardcochran@gmail.com>, <dwmw2@infradead.org>,
	<andrew+netdev@lunn.ch>, <davem@davemloft.net>,
	<edumazet@google.com>, <kuba@kernel.org>, <pabeni@redhat.com>
Cc: <devicetree@vger.kernel.org>, <netdev@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, Babis Chalios <mail@bchalios.io>,
	"Alexander Graf" <graf@amazon.de>, <mzxreary@0pointer.de>,
	Marco Cali <xmarcalx@amazon.co.uk>,
	David Woodhouse <dwmw@amazon.co.uk>,
	"Takahiro Itazuri" <itazur@amazon.co.uk>
Subject: [PATCH v6 5/7] ptp: ptp_vmclock: add 'VMCLOCK' to ACPI device match
Date: Wed, 21 Jan 2026 14:33:42 +0000	[thread overview]
Message-ID: <20260121143402.3092-6-itazur@amazon.com> (raw)
In-Reply-To: <20260121143402.3092-1-itazur@amazon.com>

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

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>
---
 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 8605e441fad7..b5e264264051 100644
--- a/drivers/ptp/ptp_vmclock.c
+++ b/drivers/ptp/ptp_vmclock.c
@@ -749,6 +749,7 @@ 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);
-- 
2.47.3


  parent reply	other threads:[~2026-01-21 14:34 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-21 14:33 [PATCH v6 0/7] ptp: vmclock: Add VM generation counter and ACPI notification Takahiro Itazuri
2026-01-21 14:33 ` [PATCH v6 1/7] ptp: vmclock: add vm generation counter Takahiro Itazuri
2026-01-21 14:33 ` [PATCH v6 2/7] ptp: vmclock: support device notifications Takahiro Itazuri
2026-01-23  3:11   ` [v6,2/7] " Jakub Kicinski
2026-01-23 20:16     ` David Woodhouse
2026-01-21 14:33 ` [PATCH v6 3/7] dt-bindings: ptp: Add amazon,vmclock Takahiro Itazuri
2026-01-21 14:33 ` [PATCH v6 4/7] ptp: ptp_vmclock: Add device tree support Takahiro Itazuri
2026-01-21 14:33 ` Takahiro Itazuri [this message]
2026-01-21 14:33 ` [PATCH v6 6/7] ptp: ptp_vmclock: remove dependency on CONFIG_ACPI Takahiro Itazuri
2026-01-21 14:33 ` [PATCH v6 7/7] ptp: ptp_vmclock: return TAI not UTC Takahiro Itazuri

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