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 <toshi.kani@xxxxxxx>
Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Robert Moore <robert.moore@xxxxxxxxx>
Cc: Robert Elliott <elliott@xxxxxxx>
---
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,
};
--
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