linux-kernel - Re: [PATCH] leds: ariel: Add driver for status LEDs on Dell Wyse 3020

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Message-ID: <20200315084230.GA1996@amd>
Date:   Sun, 15 Mar 2020 09:42:30 +0100
From:   Pavel Machek <pavel@....cz>
To:     Lubomir Rintel <lkundrak@...sk>
Cc:     Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Dan Murphy <dmurphy@...com>, linux-kernel@...r.kernel.org,
        linux-leds@...r.kernel.org
Subject: Re: [PATCH] leds: ariel: Add driver for status LEDs on Dell Wyse 3020

Hi!

> This adds support for controlling the LEDs attached to the Embedded
> Controller on a Dell Wyse 3020 "Ariel" board.
> 
> Signed-off-by: Lubomir Rintel <lkundrak@...sk>

Does not look bad.

> +static int ariel_led_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct ariel_led *leds;
> +	struct regmap *ec_ram;
> +	int ret;
> +
> +	leds = devm_kcalloc(dev, 3, sizeof(*leds), GFP_KERNEL);
> +	if (!leds)
> +		return -ENOMEM;
> +
> +	ec_ram = dev_get_regmap(dev->parent, "ec_ram");
> +	if (!ec_ram)
> +		return -ENODEV;
> +
> +	leds[0].ec_ram = ec_ram;
> +	leds[0].ec_index = EC_BLUE_LED;
> +	leds[0].led_cdev.name = "ariel:blue:power",
> +	leds[0].led_cdev.brightness_get = ariel_led_get;
> +	leds[0].led_cdev.brightness_set = ariel_led_set;
> +	leds[0].led_cdev.blink_set = ariel_blink_set;
> +	leds[0].led_cdev.default_trigger = "default-on";

Move common settings to a loop?

Definitely delete "ariel:" prefix.

> +	leds[1].led_cdev.name = "ariel:amber:status",
> +	leds[2].led_cdev.name = "ariel:green:status",

Do the LEDs have some label, or some kind of common function? Calling
it ":status" is not too useful...

> +	ret = devm_led_classdev_register(dev, &leds[2].led_cdev);
> +	if (ret)
> +		return ret;
> +
> +	dev_info(dev, "Dell Wyse 3020 LEDs\n");
> +	return 0;
> +}

Just return ret; no need to print anything into the syslog.

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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