From: Perry Yuan <Perry.Yuan@xxxxxxx>
Introduces power management callbacks for the `amd_hfi` driver.
Specifically, the `suspend` and `resume` callbacks have been added
to handle the necessary operations during system low power states
and wake-up.
Signed-off-by: Perry Yuan <Perry.Yuan@xxxxxxx>
Co-developed-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
v2:
* Whitespace changes
* Use on online CPUs not present ones
---
drivers/platform/x86/amd/hfi/hfi.c | 33 ++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/platform/x86/amd/hfi/hfi.c b/drivers/platform/x86/amd/hfi/hfi.c
index c969ee7ea5ee..0263993b0a94 100644
--- a/drivers/platform/x86/amd/hfi/hfi.c
+++ b/drivers/platform/x86/amd/hfi/hfi.c
@@ -407,6 +407,38 @@ 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_present_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},
{ }
@@ -458,6 +490,7 @@ 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,
--
2.43.0
