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ACPI/APMT: Use stable device ID

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The APMT node format includes a unique identifier, so we can use this as
the platform device ID to give userspace stable and identifiable device
names, rather than auto numbering dependent on how the table is parsed.

Cc: Lorenzo Pieralisi <lpieralisi@kernel.org>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Sudeep Holla <sudeep.holla@kernel.org>
Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Robin Murphy 2026-07-16 15:56:34 +01:00 committed by Will Deacon
parent 0263e0b788
commit 04aa909b38
1 changed files with 4 additions and 2 deletions
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6
drivers/acpi/arm64/apmt.c
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@ -76,10 +76,12 @@ static int __init apmt_add_platform_device(struct acpi_apmt_node *node,
struct fwnode_handle *fwnode)
{
struct platform_device *pdev;
int ret, count;
int ret, count, uid = node->id & INT_MAX;
struct resource res[DEV_MAX_RESOURCE_COUNT];
pdev = platform_device_alloc(DEV_NAME, PLATFORM_DEVID_AUTO);
if (uid != node->id)
pr_warn("Unexpectedly large UID 0x%x, truncated to 0x%x\n", node->id, uid);
pdev = platform_device_alloc(DEV_NAME, uid);
if (!pdev)
return -ENOMEM;