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| author |   Mario Limonciello <mario.limonciello@amd.com> | 2022-09-14 09:18:50 -0500 |
|---|---|---|
| committer |   Hans de Goede <hdegoede@redhat.com> | 2022-09-19 13:48:38 +0200 |
| commit | 7f1ea75d499a5e3a6f593da0a87096f584752750 (patch) | |
| tree | 991a2639a0fb40a84610a4e380b0d5ff2b7b3d57 /drivers/platform | |
| parent | platform/x86: hp-wmi: Setting thermal profile fails with 0x06 (diff) | |
| download | linux-dev-7f1ea75d499a5e3a6f593da0a87096f584752750.tar.xz linux-dev-7f1ea75d499a5e3a6f593da0a87096f584752750.zip | |
platform/x86/amd: pmc: Add sysfs files for SMU
The CPU/APU SMU FW version and program is currently discoverable by
turning on dynamic debugging or examining debugfs for the amdgpu
driver. To make this more discoverable, create a dedicated sysfs
file for it that userspace can parse without debugging enabled.
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20220914141850.259-1-mario.limonciello@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/amd/pmc.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/platform/x86/amd/pmc.c b/drivers/platform/x86/amd/pmc.c index 32887687f888..0616ef8ce64c 100644 --- a/drivers/platform/x86/amd/pmc.c +++ b/drivers/platform/x86/amd/pmc.c @@ -457,6 +457,44 @@ static int amd_pmc_get_smu_version(struct amd_pmc_dev *dev) return 0; } +static ssize_t smu_fw_version_show(struct device *d, struct device_attribute *attr, + char *buf) +{ + struct amd_pmc_dev *dev = dev_get_drvdata(d); + + if (!dev->major) { + int rc = amd_pmc_get_smu_version(dev); + + if (rc) + return rc; + } + return sysfs_emit(buf, "%u.%u.%u\n", dev->major, dev->minor, dev->rev); +} + +static ssize_t smu_program_show(struct device *d, struct device_attribute *attr, + char *buf) +{ + struct amd_pmc_dev *dev = dev_get_drvdata(d); + + if (!dev->major) { + int rc = amd_pmc_get_smu_version(dev); + + if (rc) + return rc; + } + return sysfs_emit(buf, "%u\n", dev->smu_program); +} + +static DEVICE_ATTR_RO(smu_fw_version); +static DEVICE_ATTR_RO(smu_program); + +static struct attribute *pmc_attrs[] = { + &dev_attr_smu_fw_version.attr, + &dev_attr_smu_program.attr, + NULL, +}; +ATTRIBUTE_GROUPS(pmc); + static int amd_pmc_idlemask_show(struct seq_file *s, void *unused) { struct amd_pmc_dev *dev = s->private; @@ -943,6 +981,7 @@ static struct platform_driver amd_pmc_driver = { .driver = { .name = "amd_pmc", .acpi_match_table = amd_pmc_acpi_ids, + .dev_groups = pmc_groups, }, .probe = amd_pmc_probe, .remove = amd_pmc_remove, |