[PATCH v2 0/3] backlight: document sysfs interfaces

[PATCH v2 0/3] backlight: document sysfs interfaces

[Aishwarya Pant]

Patchset contains documentation of the sysfs interfaces for the
following five backlight drivers-
1) lm3639
2) adp5520
3) adp8860

It was compiled from data sheets, reading code and git history logs. In v2 of
the patches, documentation for lp8788 and lp855x devices was dropped as the
attributes contained debug information.

Aishwarya Pant (3):
  backlight: lm3639: document sysfs attributes
  backlight: adp5520: document sysfs attributes
  backlight: adp8860: document sysfs attributes

 .../ABI/testing/sysfs-class-backlight-adp5520      | 31 +++++++++++++
 .../ABI/testing/sysfs-class-backlight-adp8860      | 54 ++++++++++++++++++++++
 .../ABI/testing/sysfs-class-backlight-lm3639       | 11 +++++
 3 files changed, 96 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-class-backlight-adp5520
 create mode 100644 Documentation/ABI/testing/sysfs-class-backlight-adp8860
 create mode 100644 Documentation/ABI/testing/sysfs-class-backlight-lm3639

-- 
2.16.1

[PATCH v2 1/3] backlight: lm3639: document sysfs attributes

[Aishwarya Pant]

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@gmail.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
---
Changes in v2:
- Update contact information

 Documentation/ABI/testing/sysfs-class-backlight-lm3639 | 11 +++++++++++
 1 file changed, 11 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..f7e92a82ea25
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-backlight-lm3639
@@ -0,0 +1,11 @@
+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:	dri-devel@lists.freedesktop.org
+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

[PATCH v2 2/3] backlight: adp5520: document sysfs attributes

[Aishwarya Pant]

Add documentation for sysfs interface of adp5520/adp5501 analog devices
backlight driver by reading code and looking through git commit logs.

Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
---
 .../ABI/testing/sysfs-class-backlight-adp5520      | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-class-backlight-adp5520

diff --git a/Documentation/ABI/testing/sysfs-class-backlight-adp5520 b/Documentation/ABI/testing/sysfs-class-backlight-adp5520
new file mode 100644
index 000000000000..34b6ebafa210
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-backlight-adp5520
@@ -0,0 +1,31 @@
+sysfs interface for analog devices adp5520(01) backlight driver
+---------------------------------------------------------------
+
+The backlight brightness control operates at three different levels for the
+adp5520 and adp5501 devices: daylight (level 1), office (level 2) and dark
+(level 3). By default the brightness operates at the daylight brightness level.
+
+What:		/sys/class/backlight/<backlight>/daylight_max
+What:		/sys/class/backlight/<backlight>/office_max
+What:		/sys/class/backlight/<backlight>/dark_max
+Date:		Sep, 2009
+KernelVersion:	v2.6.32
+Contact:	Michael Hennerich <michael.hennerich@analog.com>
+Description:
+		(RW) Maximum current setting for the backlight when brightness
+		is at one of the three levels (daylight, office or dark). This
+		is an input code between 0 and 127, which is transformed to a
+		value between 0 mA and 30 mA using linear or non-linear
+		algorithms.
+
+What:		/sys/class/backlight/<backlight>/daylight_dim
+What:		/sys/class/backlight/<backlight>/office_dim
+What:		/sys/class/backlight/<backlight>/dark_dim
+Date:		Sep, 2009
+KernelVersion:	v2.6.32
+Contact:	Michael Hennerich <michael.hennerich@analog.com>
+Description:
+		(RW) Dim current setting for the backlight when brightness is at
+		one of the three levels (daylight, office or dark). This is an
+		input code between 0 and 127, which is transformed to a value
+		between 0 mA and 30 mA using linear or non-linear algorithms.
-- 
2.16.1

Re: [PATCH v2 2/3] backlight: adp5520: document sysfs attributes

[Daniel Thompson]

On Tue, Feb 06, 2018 at 01:10:26PM +0530, Aishwarya Pant wrote:
> Add documentation for sysfs interface of adp5520/adp5501 analog devices
> backlight driver by reading code and looking through git commit logs.
> 
> Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
> Acked-by: Michael Hennerich <michael.hennerich@analog.com>

Acked-by: Daniel Thompson <daniel.thompson@linaro.org>

> ---
>  .../ABI/testing/sysfs-class-backlight-adp5520      | 31 ++++++++++++++++++++++
>  1 file changed, 31 insertions(+)
>  create mode 100644 Documentation/ABI/testing/sysfs-class-backlight-adp5520
> 
> diff --git a/Documentation/ABI/testing/sysfs-class-backlight-adp5520 b/Documentation/ABI/testing/sysfs-class-backlight-adp5520
> new file mode 100644
> index 000000000000..34b6ebafa210
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-class-backlight-adp5520
> @@ -0,0 +1,31 @@
> +sysfs interface for analog devices adp5520(01) backlight driver
> +---------------------------------------------------------------
> +
> +The backlight brightness control operates at three different levels for the
> +adp5520 and adp5501 devices: daylight (level 1), office (level 2) and dark
> +(level 3). By default the brightness operates at the daylight brightness level.
> +
> +What:		/sys/class/backlight/<backlight>/daylight_max
> +What:		/sys/class/backlight/<backlight>/office_max
> +What:		/sys/class/backlight/<backlight>/dark_max
> +Date:		Sep, 2009
> +KernelVersion:	v2.6.32
> +Contact:	Michael Hennerich <michael.hennerich@analog.com>
> +Description:
> +		(RW) Maximum current setting for the backlight when brightness
> +		is at one of the three levels (daylight, office or dark). This
> +		is an input code between 0 and 127, which is transformed to a
> +		value between 0 mA and 30 mA using linear or non-linear
> +		algorithms.
> +
> +What:		/sys/class/backlight/<backlight>/daylight_dim
> +What:		/sys/class/backlight/<backlight>/office_dim
> +What:		/sys/class/backlight/<backlight>/dark_dim
> +Date:		Sep, 2009
> +KernelVersion:	v2.6.32
> +Contact:	Michael Hennerich <michael.hennerich@analog.com>
> +Description:
> +		(RW) Dim current setting for the backlight when brightness is at
> +		one of the three levels (daylight, office or dark). This is an
> +		input code between 0 and 127, which is transformed to a value
> +		between 0 mA and 30 mA using linear or non-linear algorithms.
> -- 
> 2.16.1
> 

[PATCH v2 3/3] backlight: adp8860: document sysfs attributes

[Aishwarya Pant]

Add documentation for sysfs interface of adp8860 series backlight
devices by reading through code and git commits.

Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
---
 .../ABI/testing/sysfs-class-backlight-adp8860      | 54 ++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-class-backlight-adp8860

diff --git a/Documentation/ABI/testing/sysfs-class-backlight-adp8860 b/Documentation/ABI/testing/sysfs-class-backlight-adp8860
new file mode 100644
index 000000000000..54d61c788b1b
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-backlight-adp8860
@@ -0,0 +1,54 @@
+sysfs interface for analog devices adp8860 backlight driver
+-----------------------------------------------------------
+
+The backlight brightness control operates at three different levels for the
+adp8860, adp8861 and adp8863 devices: daylight (level 1), office (level 2) and
+dark (level 3). By default the brightness operates at the daylight brightness
+level.
+
+What:		/sys/class/backlight/<backlight>/ambient_light_level
+Date:		Apr, 2010
+KernelVersion:	v2.6.35
+Contact:	Michael Hennerich <michael.hennerich@analog.com>
+Description:
+		(RO) 13-bit conversion value for the first light sensor—high
+		byte (Bit 12 to Bit 8). The value is updated every 80 ms (when
+		the light sensor is enabled).
+
+
+What:		/sys/class/backlight/<backlight>/ambient_light_zone
+Date:		Apr, 2010
+KernelVersion:	v2.6.35
+Contact:	Michael Hennerich <michael.hennerich@analog.com>
+Description:
+		(RW) Read or write the specific level at which the backlight
+		operates. Value "0" enables automatic ambient light sensing, and
+		values "1", "2" or "3" set the control to daylight, office or
+		dark respectively.
+
+
+What:		/sys/class/backlight/<backlight>/l1_daylight_max
+What:		/sys/class/backlight/<backlight>/l2_office_max
+What:		/sys/class/backlight/<backlight>/l3_dark_max
+Date:		Apr, 2010
+KernelVersion:	v2.6.35
+Contact:	Michael Hennerich <michael.hennerich@analog.com>
+Description:
+		(RW) Maximum current setting for the backlight when brightness
+		is at one of the three levels (daylight, office or dark). This
+		is an input code between 0 and 127, which is transformed to a
+		value between 0 mA and 30 mA using linear or non-linear
+		algorithms.
+
+
+What:		/sys/class/backlight/<backlight>/l1_daylight_dim
+What:		/sys/class/backlight/<backlight>/l2_office_dim
+What:		/sys/class/backlight/<backlight>/l3_dark_dim
+Date:		Apr, 2010
+KernelVersion:	v2.6.35
+Contact:	Michael Hennerich <michael.hennerich@analog.com>
+Description:
+		(RW) Dim current setting for the backlight when brightness is at
+		one of the three levels (daylight, office or dark). This is an
+		input code between 0 and 127, which is transformed to a value
+		between 0 mA and 30 mA using linear or non-linear algorithms.
-- 
2.16.1

Re: [PATCH v2 3/3] backlight: adp8860: document sysfs attributes

[Daniel Thompson]

On Tue, Feb 06, 2018 at 01:11:12PM +0530, Aishwarya Pant wrote:
> Add documentation for sysfs interface of adp8860 series backlight
> devices by reading through code and git commits.
> 
> Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
> Acked-by: Michael Hennerich <michael.hennerich@analog.com>

Acked-by: Daniel Thompson <daniel.thompson@linaro.org>

> ---
>  .../ABI/testing/sysfs-class-backlight-adp8860      | 54 ++++++++++++++++++++++
>  1 file changed, 54 insertions(+)
>  create mode 100644 Documentation/ABI/testing/sysfs-class-backlight-adp8860
> 
> diff --git a/Documentation/ABI/testing/sysfs-class-backlight-adp8860 b/Documentation/ABI/testing/sysfs-class-backlight-adp8860
> new file mode 100644
> index 000000000000..54d61c788b1b
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-class-backlight-adp8860
> @@ -0,0 +1,54 @@
> +sysfs interface for analog devices adp8860 backlight driver
> +-----------------------------------------------------------
> +
> +The backlight brightness control operates at three different levels for the
> +adp8860, adp8861 and adp8863 devices: daylight (level 1), office (level 2) and
> +dark (level 3). By default the brightness operates at the daylight brightness
> +level.
> +
> +What:		/sys/class/backlight/<backlight>/ambient_light_level
> +Date:		Apr, 2010
> +KernelVersion:	v2.6.35
> +Contact:	Michael Hennerich <michael.hennerich@analog.com>
> +Description:
> +		(RO) 13-bit conversion value for the first light sensor—high
> +		byte (Bit 12 to Bit 8). The value is updated every 80 ms (when
> +		the light sensor is enabled).
> +
> +
> +What:		/sys/class/backlight/<backlight>/ambient_light_zone
> +Date:		Apr, 2010
> +KernelVersion:	v2.6.35
> +Contact:	Michael Hennerich <michael.hennerich@analog.com>
> +Description:
> +		(RW) Read or write the specific level at which the backlight
> +		operates. Value "0" enables automatic ambient light sensing, and
> +		values "1", "2" or "3" set the control to daylight, office or
> +		dark respectively.
> +
> +
> +What:		/sys/class/backlight/<backlight>/l1_daylight_max
> +What:		/sys/class/backlight/<backlight>/l2_office_max
> +What:		/sys/class/backlight/<backlight>/l3_dark_max
> +Date:		Apr, 2010
> +KernelVersion:	v2.6.35
> +Contact:	Michael Hennerich <michael.hennerich@analog.com>
> +Description:
> +		(RW) Maximum current setting for the backlight when brightness
> +		is at one of the three levels (daylight, office or dark). This
> +		is an input code between 0 and 127, which is transformed to a
> +		value between 0 mA and 30 mA using linear or non-linear
> +		algorithms.
> +
> +
> +What:		/sys/class/backlight/<backlight>/l1_daylight_dim
> +What:		/sys/class/backlight/<backlight>/l2_office_dim
> +What:		/sys/class/backlight/<backlight>/l3_dark_dim
> +Date:		Apr, 2010
> +KernelVersion:	v2.6.35
> +Contact:	Michael Hennerich <michael.hennerich@analog.com>
> +Description:
> +		(RW) Dim current setting for the backlight when brightness is at
> +		one of the three levels (daylight, office or dark). This is an
> +		input code between 0 and 127, which is transformed to a value
> +		between 0 mA and 30 mA using linear or non-linear algorithms.
> -- 
> 2.16.1
> 

Re: [PATCH v2 0/3] backlight: document sysfs interfaces

[Jonathan Corbet]

On Tue, 6 Feb 2018 13:08:41 +0530
Aishwarya Pant <aishpant@gmail.com> wrote:

> Patchset contains documentation of the sysfs interfaces for the
> following five backlight drivers-
> 1) lm3639
> 2) adp5520
> 3) adp8860
> 
> It was compiled from data sheets, reading code and git history logs. In v2 of
> the patches, documentation for lp8788 and lp855x devices was dropped as the
> attributes contained debug information.

I've applied the set to the docs tree, thanks.

jon