From: Pavel Machek <pavel@ucw.cz>
To: Dan Murphy <dmurphy@ti.com>
Cc: jacek.anaszewski@gmail.com, robh@kernel.org, marek.behun@nic.cz,
devicetree@vger.kernel.org, linux-leds@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v30 05/16] leds: multicolor: Introduce a multicolor class definition
Date: Thu, 16 Jul 2020 10:31:04 +0200 [thread overview]
Message-ID: <20200716083104.GA30361@amd> (raw)
In-Reply-To: <20200713154544.1683-6-dmurphy@ti.com>
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Hi!
First, let's substitute multi.color -> multicolor globally,
LEDS_CLASS_MULTI_COLOR is most visible example of this. Please also
decide whether it is MultiColor or multicolor, and make it consistent.
> Introduce a multicolor class that groups colored LEDs
> within a LED node.
>
> The multi color class groups monochrome LEDs and allows controlling two
For example here. Plus, the LEDs are not neccessarily monochrome, we
support white LEDs, too. Let's use "simple LEDs"?
> aspects of the final combined color: hue and lightness. The former is
> controlled via the intensity file and the latter is controlled
> via brightness file.
> + depends on LEDS_CLASS
> + help
> + This option enables the multicolor LED sysfs class in /sys/class/leds.
> + It wraps LED class and adds multicolor LED specific sysfs attributes
> + and kernel internal API to it. You'll need this to provide support
> + for multicolor LEDs that are grouped together. This class is not
> + intended for single color LEDs. It can be built as a module.
"single color" -> "simple"?
> + /* account for the new line at the end of the buffer */
> + offset++;
> + if (offset < size) {
> + ret = -EINVAL;
> + goto err_out;
> + }
"new line" -> "newline", and actually check that character you are
skipping is newline. Someone could put '%' in there...
> + if (i < mcled_cdev->num_colors - 1)
> + len += sprintf(buf + len, " ");
> + len += sprintf(buf + len, "\n");
Using sprintf for single character has... quite a lot of
overhead. Something like buf[len++] = '\n' would be
simpler/shorter/better. Please fix all relevant places.
Note I already applied patches 1-4.
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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next prev parent reply other threads:[~2020-07-16 8:31 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-13 15:45 [PATCH v30 00/16] Multicolor Framework v30 Dan Murphy
2020-07-13 15:45 ` [PATCH v30 01/16] leds: lp55xx: Fix file permissions to use DEVICE_ATTR macros Dan Murphy
2020-07-15 13:19 ` Marek Behún
2020-07-13 15:45 ` [PATCH v30 02/16] leds: lp5523: Fix various formatting issues in the code Dan Murphy
2020-07-15 13:20 ` Marek Behún
2020-07-13 15:45 ` [PATCH v30 03/16] dt: bindings: Add multicolor class dt bindings documention Dan Murphy
2020-07-15 13:20 ` Marek Behún
2020-07-13 15:45 ` [PATCH v30 04/16] leds: Add multicolor ID to the color ID list Dan Murphy
2020-07-15 13:20 ` Marek Behún
2020-07-15 17:36 ` Pavel Machek
2020-07-15 17:59 ` Marek Behún
2020-07-13 15:45 ` [PATCH v30 05/16] leds: multicolor: Introduce a multicolor class definition Dan Murphy
2020-07-15 13:21 ` Marek Behún
2020-07-16 8:31 ` Pavel Machek [this message]
2020-07-16 15:03 ` Dan Murphy
2020-07-16 15:06 ` Dan Murphy
2020-07-13 15:45 ` [PATCH v30 06/16] dt: bindings: lp50xx: Introduce the lp50xx family of RGB drivers Dan Murphy
2020-07-13 15:45 ` [PATCH v30 07/16] leds: lp50xx: Add the LP50XX family of the RGB LED driver Dan Murphy
2020-07-13 15:45 ` [PATCH v30 08/16] dt-bindings: leds: Convert leds-lp55xx to yaml Dan Murphy
2020-07-13 15:45 ` [PATCH v30 09/16] leds: lp55xx: Convert LED class registration to devm_* Dan Murphy
2020-07-13 15:45 ` [PATCH v30 10/16] leds: lp55xx: Add multicolor framework support to lp55xx Dan Murphy
2020-07-13 15:45 ` [PATCH v30 11/16] ARM: defconfig: u8500: Add LP55XX_COMMON config flag Dan Murphy
2020-07-13 15:45 ` [PATCH v30 12/16] leds: lp5523: Update the lp5523 code to add multicolor brightness function Dan Murphy
2020-07-13 15:45 ` [PATCH v30 13/16] leds: lp5521: Add multicolor framework multicolor brightness support Dan Murphy
2020-07-13 15:45 ` [PATCH v30 14/16] ARM: dts: n900: Add reg property to the LP5523 channel node Dan Murphy
2020-07-13 15:45 ` [PATCH v30 15/16] ARM: dts: imx6dl-yapp4: Add reg property to the lp5562 " Dan Murphy
2020-07-13 15:45 ` [PATCH v30 16/16] ARM: dts: ste-href: Add reg property to the LP5521 channel nodes Dan Murphy
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