linux-kernel - Re: [PATCH v14 04/19] leds: multicolor: Introduce a multicolor class definition

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Date:   Wed, 23 Oct 2019 07:23:08 -0500
From:   Dan Murphy <dmurphy@...com>
To:     Jacek Anaszewski <jacek.anaszewski@...il.com>, <pavel@....cz>
CC:     <linux-leds@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v14 04/19] leds: multicolor: Introduce a multicolor class
 definition


On 10/18/19 4:44 PM, Jacek Anaszewski wrote:
> Dan,
>
> Thank you for the update.
>
> On 10/18/19 2:25 PM, Dan Murphy wrote:
>> Introduce a multicolor class that groups colored LEDs
>> within a LED node.
>>
>> The multi color class groups monochrome LEDs and allows controlling two
>> aspects of the final combined color: hue and lightness. The former is
>> controlled via <color>_intensity files and the latter is controlled
>> via brightness file.
>>
>> Signed-off-by: Dan Murphy <dmurphy@...com>
>> ---
>>   .../ABI/testing/sysfs-class-led-multicolor    |  36 +++
>>   Documentation/leds/index.rst                  |   1 +
>>   Documentation/leds/leds-class-multicolor.rst  | 100 +++++++
>>   drivers/leds/Kconfig                          |  10 +
>>   drivers/leds/Makefile                         |   1 +
>>   drivers/leds/led-class-multicolor.c           | 271 ++++++++++++++++++
>>   include/linux/led-class-multicolor.h          |  97 +++++++
>>   7 files changed, 516 insertions(+)
>>   create mode 100644 Documentation/ABI/testing/sysfs-class-led-multicolor
>>   create mode 100644 Documentation/leds/leds-class-multicolor.rst
>>   create mode 100644 drivers/leds/led-class-multicolor.c
>>   create mode 100644 include/linux/led-class-multicolor.h
> [...]
>>   # LED Platform Drivers
>> diff --git a/drivers/leds/led-class-multicolor.c b/drivers/leds/led-class-multicolor.c
>> new file mode 100644
>> index 000000000000..453fd8e913e9
>> --- /dev/null
>> +++ b/drivers/leds/led-class-multicolor.c
>> @@ -0,0 +1,271 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +// LED Multi Color class interface
>> +// Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
>> +
>> +#include <linux/device.h>
>> +#include <linux/init.h>
>> +#include <linux/led-class-multicolor.h>
>> +#include <linux/module.h>
>> +#include <linux/slab.h>
>> +#include <linux/uaccess.h>
>> +
>> +#include "leds.h"
>> +
>> +#define INTENSITY_NAME		"_intensity"
>> +#define MAX_INTENSITY_NAME	"_max_intensity"
>> +
>> +int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
>> +				 enum led_brightness brightness,
>> +			       struct led_mc_color_conversion color_component[])
>> +{
>> +	struct led_mc_color_entry *priv;
>> +	int i = 0;
>> +
>> +	list_for_each_entry(priv, &mcled_cdev->color_list, list) {
>> +		color_component[i].color_id = priv->led_color_id;
>> +		color_component[i].brightness = brightness *
>> +					  priv->intensity / priv->max_intensity;
>> +		i++;
>> +	}
> For lines in the function above:
>
> s/component/components/

Ack


>
>> +	return 0;
>> +}
>> +EXPORT_SYMBOL_GPL(led_mc_calc_color_components);
>