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

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Message-ID: <20180206135735.zywr2sdkuiejpvcm@oak.lan>
Date:   Tue, 6 Feb 2018 13:57:35 +0000
From:   Daniel Thompson <daniel.thompson@...aro.org>
To:     Aishwarya Pant <aishpant@...il.com>
Cc:     Lee Jones <lee.jones@...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>,
        Michael Hennerich <michael.hennerich@...log.com>,
        Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH v2 3/3] backlight: adp8860: document sysfs attributes

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@...il.com>
> Acked-by: Michael Hennerich <michael.hennerich@...log.com>

Acked-by: Daniel Thompson <daniel.thompson@...aro.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@...log.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@...log.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@...log.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@...log.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
>