[PATCH v2] [trusty] SAUCE: Add use native backlight quirk for Dell Inspiron 5547/5447

[Edward Lin]

BugLink: http://bugs.launchpad.net/bugs/1332437

The ACPI backlight control is broken on these 2 models.
Since backlight control works on 3.16.0-999-generic #201406200205,
and also works on 3.13.0-29 with video.use_native_backlight=1.
Add use native backlight quirk for these 2 models as the workaround.

This patch can be ignored after 3.16-r2.

Changes v1 -> v2:
  - exclude Dell Inspiron 5737 from quirk

Signed-off-by: Edward Lin <yidi.lin at canonical.com>
---
 drivers/acpi/video.c |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 5b6f970..ffdd2c6 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -500,6 +500,22 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
 	},
 	{
 	 .callback = video_set_use_native_backlight,
+	 .ident = "Dell Inspiron 5547",
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+		DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5547"),
+		},
+	},
+	{
+	 .callback = video_set_use_native_backlight,
+	 .ident = "Dell Inspiron 5447",
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+		DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5447"),
+		},
+	},
+	{
+	 .callback = video_set_use_native_backlight,
 	 .ident = "Acer Aspire 5733Z",
 	 .matches = {
 		DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
-- 
1.7.9.5