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platform/x86/amd/pmf: Force load driver on older supported platforms

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Some of the older platforms with _HID "AMDI0100" PMF driver can be force
loaded by interested users but only for experimental purposes.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20220802151149.2123699-11-Shyam-sundar.S-k@amd.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Shyam Sundar S K 2022-08-02 20:41:48 +05:30 committed by Hans de Goede
parent 7d77dcc83a
commit 9448ec9b0f
1 changed files with 16 additions and 0 deletions
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16
drivers/platform/x86/amd/pmf/core.c
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@ -39,6 +39,7 @@
#define AMD_PMF_RESULT_FAILED 0xFF
/* List of supported CPU ids */
#define AMD_CPU_ID_RMB 0x14b5
#define AMD_CPU_ID_PS 0x14e8
#define PMF_MSG_DELAY_MIN_US 50
@ -52,6 +53,11 @@ static int metrics_table_loop_ms = 1000;
module_param(metrics_table_loop_ms, int, 0644);
MODULE_PARM_DESC(metrics_table_loop_ms, "Metrics Table sample size time (default = 1000ms)");
/* Force load on supported older platforms */
static bool force_load;
module_param(force_load, bool, 0444);
MODULE_PARM_DESC(force_load, "Force load this driver on supported older platforms (experimental)");
static int current_power_limits_show(struct seq_file *seq, void *unused)
{
struct amd_pmf_dev *dev = seq->private;
@ -208,6 +214,7 @@ int amd_pmf_send_cmd(struct amd_pmf_dev *dev, u8 message, bool get, u32 arg, u32
}
static const struct pci_device_id pmf_pci_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, AMD_CPU_ID_RMB) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, AMD_CPU_ID_PS) },
{ }
};
@ -265,6 +272,7 @@ static void amd_pmf_deinit_features(struct amd_pmf_dev *dev)
}
static const struct acpi_device_id amd_pmf_acpi_ids[] = {
{"AMDI0100", 0x100},
{"AMDI0102", 0},
{ }
};
@ -272,6 +280,7 @@ MODULE_DEVICE_TABLE(acpi, amd_pmf_acpi_ids);
static int amd_pmf_probe(struct platform_device *pdev)
{
const struct acpi_device_id *id;
struct amd_pmf_dev *dev;
struct pci_dev *rdev;
u32 base_addr_lo;
@ -280,6 +289,13 @@ static int amd_pmf_probe(struct platform_device *pdev)
u32 val;
int err;
id = acpi_match_device(amd_pmf_acpi_ids, &pdev->dev);
if (!id)
return -ENODEV;
if (id->driver_data == 0x100 && !force_load)
return -ENODEV;
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;