linux-kernel - Re: [PATCH v10 2/2] leds: sc27xx: Add pattern

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Date:   Thu, 6 Sep 2018 23:16:05 +0200
From:   Pavel Machek <pavel@....cz>
To:     Baolin Wang <baolin.wang@...aro.org>
Cc:     jacek.anaszewski@...il.com, rteysseyre@...il.com,
        bjorn.andersson@...aro.org, broonie@...nel.org,
        linus.walleij@...aro.org, linux-leds@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v10 2/2] leds: sc27xx: Add pattern_set/clear interfaces
 for LED controller

Hi!

> diff --git a/Documentation/ABI/testing/sysfs-class-led-driver-sc27xx b/Documentation/ABI/testing/sysfs-class-led-driver-sc27xx
> new file mode 100644
> index 0000000..d8056d5
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-class-led-driver-sc27xx
> @@ -0,0 +1,22 @@
> +What:		/sys/class/leds/<led>/hw_pattern
> +Date:		September 2018
> +KernelVersion:	4.20
> +Description:
> +		Specify a hardware pattern for the SC27XX LED. For the SC27XX
> +		LED controller, it only supports 4 stages to make a single
> +		hardware pattern, which is used to configure the rise time,
> +		high time, fall time and low time for the breathing mode.
> +
> +		For the breathing mode, the SC27XX LED only expects one brightness
> +		for the high stage. To be compatible with the hardware pattern
> +		format, we should set brightness as 0 for rise stage, fall
> +		stage and low stage.
> +
> +		Min stage duration: 125 ms
> +		Max stage duration: 31875 ms
> +
> +		Since the stage duration step is 125 ms, the duration must be
> +		a multiplier of 125, like 125ms, 250ms, 375ms, 500ms ... 31875ms.
> +
> +		Thus the format of the hardware pattern values should be:
> +		"0 rise_duration brightness high_duration 0 fall_duration 0 low_duration".

If I'm not mistaken, this is:

                "0 rise_duration brightness high_duration brightness
                fall_duration 0 low_duration".

Right?

With that fixed:

Acked-by: Pavel Machek <pavel@....c>

And... thanks!
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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