[PATCH 3/5] backlight: lm3639: document sysfs attributes

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Add documentation for sysfs interfaces of Texas Instruments lm3639
backlight + flash led driver chip by looking through git commits and
reading code.

Signed-off-by: Aishwarya Pant <aishpant@xxxxxxxxx>
---
 Documentation/ABI/testing/sysfs-class-backlight-lm3639 | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-class-backlight-lm3639

diff --git a/Documentation/ABI/testing/sysfs-class-backlight-lm3639 b/Documentation/ABI/testing/sysfs-class-backlight-lm3639
new file mode 100644
index 000000000000..ec87dc8f4395
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-backlight-lm3639
@@ -0,0 +1,13 @@
+sysfs interface for Texas Instruments lm3639 backlight + flash led driver chip
+------------------------------------------------------------------------------
+
+What:		/sys/class/backlight/<backlight>/bled_mode
+Date:		Oct, 2012
+KernelVersion:	v3.10
+Contact:	Lee Jones <lee.jones@xxxxxxxxxx>,
+		Daniel Thompson <daniel.thompson@xxxxxxxxxx>,
+		Jingoo Han <jingoohan1@xxxxxxxxx>
+Description:
+		(WO) Write to the backlight mapping mode. The backlight current
+		can be mapped for either exponential (value "0") or linear
+		mapping modes (default).
-- 
2.16.1

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