Commit 263e66f9 authored by Perry Yuan's avatar Perry Yuan Committed by Borislav Petkov (AMD)
Browse files

platform/x86: hfi: Add power management callback 



Introduce power management callbacks for the `amd_hfi` driver.  Specifically,
add the `suspend` and `resume` callbacks to handle the necessary operations
during system low power states and wake-up.

Signed-off-by: default avatarPerry Yuan <Perry.Yuan@amd.com>
Co-developed-by: default avatarMario Limonciello <mario.limonciello@amd.com>
Signed-off-by: default avatarMario Limonciello <mario.limonciello@amd.com>
Signed-off-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: default avatarGautham R. Shenoy <gautham.shenoy@amd.com>
Acked-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/20250609200518.3616080-9-superm1@kernel.org
parent bb20421c

drivers/platform/x86/amd/hfi/hfi.c

+33 −0
Original line number Diff line number Diff line
@@ -385,6 +385,38 @@ static int amd_hfi_metadata_parser(struct platform_device *pdev, 
	return ret;

}



static int amd_hfi_pm_resume(struct device *dev)

{

	int ret, cpu;



	for_each_online_cpu(cpu) {

		ret = amd_hfi_set_state(cpu, true);

		if (ret < 0) {

			dev_err(dev, "failed to enable workload class config: %d\n", ret);

			return ret;

		}

	}



	return 0;

}



static int amd_hfi_pm_suspend(struct device *dev)

{

	int ret, cpu;



	for_each_online_cpu(cpu) {

		ret = amd_hfi_set_state(cpu, false);

		if (ret < 0) {

			dev_err(dev, "failed to disable workload class config: %d\n", ret);

			return ret;

		}

	}



	return 0;

}



static DEFINE_SIMPLE_DEV_PM_OPS(amd_hfi_pm_ops, amd_hfi_pm_suspend, amd_hfi_pm_resume);



static const struct acpi_device_id amd_hfi_platform_match[] = {

	{"AMDI0104", 0},

	{ }
@@ -434,6 +466,7 @@ static struct platform_driver amd_hfi_driver = { 
	.driver = {

		.name = AMD_HFI_DRIVER,

		.owner = THIS_MODULE,

		.pm = &amd_hfi_pm_ops,

		.acpi_match_table = ACPI_PTR(amd_hfi_platform_match),

	},

	.probe = amd_hfi_probe,