firmware: dmi: Add DMI_PRODUCT_FAMILY identification string

Sometimes it is more convenient to be able to match a whole family of
products, like in case of bunch of Chromebooks based on Intel_Strago to
apply a driver quirk instead of quirking each machine one-by-one.

This adds support for DMI_PRODUCT_FAMILY identification string and also
exports it to the userspace through sysfs attribute just like the
existing ones.

Suggested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/firmware/dmi-id.c b/drivers/firmware/dmi-id.c
index 44c0139..dc269cb 100644 (file)
--- 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_family,      0400, 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);
 DEFINE_DMI_ATTR_WITH_SHOW(board_version,       0444, DMI_BOARD_VERSION);
@@ -191,6 +192,7 @@ static void __init dmi_id_init_attr_table(void)
        ADD_DMI_ATTR(product_version,   DMI_PRODUCT_VERSION);
        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(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 54be60e..93f7acd 100644 (file)
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -430,6 +430,7 @@ 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_FAMILY, 26);
                break;
        case 2:         /* Base Board Information */
                dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);

diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 566fda5..3f74ef2 100644 (file)
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -467,6 +467,7 @@ enum dmi_field {
        DMI_PRODUCT_VERSION,
        DMI_PRODUCT_SERIAL,
        DMI_PRODUCT_UUID,
+       DMI_PRODUCT_FAMILY,
        DMI_BOARD_VENDOR,
        DMI_BOARD_NAME,
        DMI_BOARD_VERSION,