linux-kernel - [PATCH 2/5] backlight: lp855x: document sysfs attributes

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Date:   Fri, 26 Jan 2018 20:23:00 +0530
From:   Aishwarya Pant <aishpant@...il.com>
To:     Lee Jones <lee.jones@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>,
        Greg KH <gregkh@...uxfoundation.org>,
        Milo Kim <milo.kim@...com>
Cc:     Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 2/5] backlight: lp855x: document sysfs attributes

Add documentation for sysfs interface of Texas Instruments lp855x
backlight driver by reading code and looking through git commit logs.

Signed-off-by: Aishwarya Pant <aishpant@...il.com>
---
 .../ABI/testing/sysfs-class-backlight-lp855x          | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-class-backlight-lp855x

diff --git a/Documentation/ABI/testing/sysfs-class-backlight-lp855x b/Documentation/ABI/testing/sysfs-class-backlight-lp855x
new file mode 100644
index 000000000000..5b9d38958875
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-backlight-lp855x
@@ -0,0 +1,19 @@
+sysfs interface for Texas Instruments lp855x backlight driver
+------------------------------------------------------------
+
+What:		/sys/class/backlight/<backlight>/chip_id
+Date:		Mar, 2012
+KernelVersion:	v3.10
+Contact:	Milo Kim <milo.kim@...com>
+Description:
+		(RO) Displays the lp8755x chip id. Possible values are:
+		lp8550, lp8551, lp8552, lp8553, lp8555, lp8556 or lp8557.
+
+
+What:		/sys/class/backlight/<backlight>/bl_ctl_mode
+Date:		Mar, 2012
+KernelVersion:	v3.10
+Contact:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
+Description:
+		(RO) Displays whether the brightness is controlled by the pwm
+		input("pwm based) or the i2c register("register based").
-- 
2.16.1