firmware: dmi: Add access to the SKU ID string

This is used in some systems from user space for determining the identity
of the device.

Expose this as a file so that that user-space tools don't need to read
from /sys/firmware/dmi/tables/DMI

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Jean Delvare <jdelvare@suse.de>

3 files changed, 4 insertions, 0 deletions

diff --git a/drivers/firmware/dmi-id.c b/drivers/firmware/dmi-id.c
index 951b6c79f166..624a11cb07e2 100644
--- a/drivers/firmware/dmi-id.c
+++ b/drivers/firmware/dmi-id.c
@@ -47,6 +47,7 @@ DEFINE_DMI_ATTR_WITH_SHOW(product_name,		0444, DMI_PRODUCT_NAME);
 DEFINE_DMI_ATTR_WITH_SHOW(product_version,      0444, DMI_PRODUCT_VERSION);
 DEFINE_DMI_ATTR_WITH_SHOW(product_serial,       0400, DMI_PRODUCT_SERIAL);
 DEFINE_DMI_ATTR_WITH_SHOW(product_uuid,         0400, DMI_PRODUCT_UUID);
+DEFINE_DMI_ATTR_WITH_SHOW(product_sku,          0444, DMI_PRODUCT_SKU);
 DEFINE_DMI_ATTR_WITH_SHOW(product_family,       0444, DMI_PRODUCT_FAMILY);
 DEFINE_DMI_ATTR_WITH_SHOW(board_vendor,         0444, DMI_BOARD_VENDOR);
 DEFINE_DMI_ATTR_WITH_SHOW(board_name,           0444, DMI_BOARD_NAME);
@@ -193,6 +194,7 @@ static void __init dmi_id_init_attr_table(void)
         ADD_DMI_ATTR(product_serial,    DMI_PRODUCT_SERIAL);
         ADD_DMI_ATTR(product_uuid,      DMI_PRODUCT_UUID);
         ADD_DMI_ATTR(product_family,    DMI_PRODUCT_FAMILY);
+        ADD_DMI_ATTR(product_sku,       DMI_PRODUCT_SKU);
         ADD_DMI_ATTR(board_vendor,      DMI_BOARD_VENDOR);
         ADD_DMI_ATTR(board_name,        DMI_BOARD_NAME);
         ADD_DMI_ATTR(board_version,     DMI_BOARD_VERSION);
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index 54e66adef252..f2483548cde9 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -447,6 +447,7 @@ static void __init dmi_decode(const struct dmi_header *dm, void *dummy)
                 dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
                 dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7);
                 dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8);
+                dmi_save_ident(dm, DMI_PRODUCT_SKU, 25);
                 dmi_save_ident(dm, DMI_PRODUCT_FAMILY, 26);
                 break;
         case 2:         /* Base Board Information */
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 7d361be2e24f..61fbfbc03e5b 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -490,6 +490,7 @@ enum dmi_field {
         DMI_PRODUCT_VERSION,
         DMI_PRODUCT_SERIAL,
         DMI_PRODUCT_UUID,
+        DMI_PRODUCT_SKU,
         DMI_PRODUCT_FAMILY,
         DMI_BOARD_VENDOR,
         DMI_BOARD_NAME,