ACPI 6.1, section 5.2.25.9, defines an identifier for an NVDIMM.
Change the NFIT driver to create read-only "id" file under NVDIMM's
nfit directory of sysfs, which shows the NVDIMM ID.
Signed-off-by: Toshi Kani <toshi.kani@xxxxxxx>
Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Robert Elliott <elliott@xxxxxxx>
---
drivers/acpi/nfit.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c
index 4982a18..677cf89 100644
--- a/drivers/acpi/nfit.c
+++ b/drivers/acpi/nfit.c
@@ -781,6 +781,26 @@ 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, "%02x%02x-%02x-%02x%02x-%02x%02x%02x%02x\n",
+ dcr->vendor_id[0], dcr->vendor_id[1],
+ dcr->manufacturing_location,
+ dcr->manufacturing_date[0], dcr->manufacturing_date[1],
+ dcr->serial_number[0], dcr->serial_number[1],
+ dcr->serial_number[2], dcr->serial_number[3]);
+ else
+ return sprintf(buf, "%02x%02x-%02x%02x%02x%02x\n",
+ dcr->vendor_id[0], dcr->vendor_id[1],
+ dcr->serial_number[0], dcr->serial_number[1],
+ dcr->serial_number[2], dcr->serial_number[3]);
+}
+static DEVICE_ATTR_RO(id);
+
static struct attribute *acpi_nfit_dimm_attributes[] = {
&dev_attr_handle.attr,
&dev_attr_phys_id.attr,
@@ -790,6 +810,7 @@ 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,
};
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