ACPI 6.1, section 5.2.25.9, defines an identifier for an NVDIMM. Change the NFIT driver to add a new sysfs file "id" under nfit directory.
Signed-off-by: Toshi Kani <[email protected]> Cc: Rafael J. Wysocki <[email protected]> Cc: Dan Williams <[email protected]> Cc: Robert Moore <[email protected]> Cc: Robert Elliott <[email protected]> --- drivers/acpi/nfit.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c index 5dc243c..5a7199d 100644 --- a/drivers/acpi/nfit.c +++ b/drivers/acpi/nfit.c @@ -870,6 +870,24 @@ static ssize_t flags_show(struct device *dev, } static DEVICE_ATTR_RO(flags); +static ssize_t id_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev); + + if (dcr->valid_fields & ACPI_NFIT_CONTROL_MFG_INFO_VALID) + return sprintf(buf, "%04x-%02x-%04x-%08x\n", + be16_to_cpu(dcr->vendor_id), + dcr->manufacturing_location, + be16_to_cpu(dcr->manufacturing_date), + be32_to_cpu(dcr->serial_number)); + else + return sprintf(buf, "%04x-%08x\n", + be16_to_cpu(dcr->vendor_id), + be32_to_cpu(dcr->serial_number)); +} +static DEVICE_ATTR_RO(id); + static struct attribute *acpi_nfit_dimm_attributes[] = { &dev_attr_handle.attr, &dev_attr_phys_id.attr, @@ -879,6 +897,7 @@ static struct attribute *acpi_nfit_dimm_attributes[] = { &dev_attr_serial.attr, &dev_attr_rev_id.attr, &dev_attr_flags.attr, + &dev_attr_id.attr, NULL, };
