linux-kernel - [PATCH] firmware: dmi: Add access to the SKU ID string

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Message-Id: <20180424211111.140374-1-sjg@chromium.org>
Date:   Tue, 24 Apr 2018 15:11:11 -0600
From:   Simon Glass <sjg@...omium.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     C Shapiro <shapiroc@...omium.org>,
        Aaron Durbin <adurbin@...omium.org>,
        Simon Glass <sjg@...omium.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Jonathan Corbet <corbet@....net>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Alex Hung <alex.hung@...onical.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jean Delvare <jdelvare@...e.com>,
        sayli karnik <karniksayli1995@...il.com>,
        Vinod Koul <vinod.koul@...el.com>,
        Sagar Dharia <sdharia@...eaurora.org>
Subject: [PATCH] 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@...omium.org>
---

 drivers/firmware/dmi-id.c       | 2 ++
 drivers/firmware/dmi_scan.c     | 1 +
 include/linux/mod_devicetable.h | 1 +
 3 files changed, 4 insertions(+)

diff --git a/drivers/firmware/dmi-id.c b/drivers/firmware/dmi-id.c
index 951b6c79f166a..fe78c7f801163 100644
--- a/drivers/firmware/dmi-id.c
+++ b/drivers/firmware/dmi-id.c
@@ -48,6 +48,7 @@ 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_family,	0444, DMI_PRODUCT_FAMILY);
+DEFINE_DMI_ATTR_WITH_SHOW(product_sku,		0444, DMI_PRODUCT_SKU);
 DEFINE_DMI_ATTR_WITH_SHOW(board_vendor,		0444, DMI_BOARD_VENDOR);
 DEFINE_DMI_ATTR_WITH_SHOW(board_name,		0444, DMI_BOARD_NAME);
 DEFINE_DMI_ATTR_WITH_SHOW(board_version,	0444, DMI_BOARD_VERSION);
@@ -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 54e66adef2525..f2483548cde92 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 7d361be2e24f4..cb8487e29d3ae 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -491,6 +491,7 @@ enum dmi_field {
 	DMI_PRODUCT_SERIAL,
 	DMI_PRODUCT_UUID,
 	DMI_PRODUCT_FAMILY,
+	DMI_PRODUCT_SKU,
 	DMI_BOARD_VENDOR,
 	DMI_BOARD_NAME,
 	DMI_BOARD_VERSION,
-- 
2.17.0.484.g0c8726318c-goog