cregit-Linux how code gets into the kernel

Release 4.14 drivers/leds/leds-dac124s085.c

Directory: drivers/leds
/*
 * Copyright 2008
 * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
 *
 * This file is subject to the terms and conditions of version 2 of
 * the GNU General Public License.  See the file COPYING in the main
 * directory of this archive for more details.
 *
 * LED driver for the DAC124S085 SPI DAC
 */

#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>


struct dac124s085_led {
	
struct led_classdev	ldev;
	
struct spi_device	*spi;
	
int			id;
	
char			name[sizeof("dac124s085-3")];

	
struct mutex		mutex;
};


struct dac124s085 {
	
struct dac124s085_led leds[4];
};


#define REG_WRITE		(0 << 12)

#define REG_WRITE_UPDATE	(1 << 12)

#define ALL_WRITE_UPDATE	(2 << 12)

#define POWER_DOWN_OUTPUT	(3 << 12)


static int dac124s085_set_brightness(struct led_classdev *ldev, enum led_brightness brightness) { struct dac124s085_led *led = container_of(ldev, struct dac124s085_led, ldev); u16 word; int ret; mutex_lock(&led->mutex); word = cpu_to_le16(((led->id) << 14) | REG_WRITE_UPDATE | (brightness & 0xfff)); ret = spi_write(led->spi, (const u8 *)&word, sizeof(word)); mutex_unlock(&led->mutex); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Guennadi Liakhovetski8282.00%150.00%
Andrew Lunn1818.00%150.00%
Total100100.00%2100.00%


static int dac124s085_probe(struct spi_device *spi) { struct dac124s085 *dac; struct dac124s085_led *led; int i, ret; dac = devm_kzalloc(&spi->dev, sizeof(*dac), GFP_KERNEL); if (!dac) return -ENOMEM; spi->bits_per_word = 16; for (i = 0; i < ARRAY_SIZE(dac->leds); i++) { led = dac->leds + i; led->id = i; led->spi = spi; snprintf(led->name, sizeof(led->name), "dac124s085-%d", i); mutex_init(&led->mutex); led->ldev.name = led->name; led->ldev.brightness = LED_OFF; led->ldev.max_brightness = 0xfff; led->ldev.brightness_set_blocking = dac124s085_set_brightness; ret = led_classdev_register(&spi->dev, &led->ldev); if (ret < 0) goto eledcr; } spi_set_drvdata(spi, dac); return 0; eledcr: while (i--) led_classdev_unregister(&dac->leds[i].ldev); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Guennadi Liakhovetski20996.76%133.33%
Bryan Wu62.78%133.33%
Andrew Lunn10.46%133.33%
Total216100.00%3100.00%


static int dac124s085_remove(struct spi_device *spi) { struct dac124s085 *dac = spi_get_drvdata(spi); int i; for (i = 0; i < ARRAY_SIZE(dac->leds); i++) led_classdev_unregister(&dac->leds[i].ldev); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Guennadi Liakhovetski58100.00%1100.00%
Total58100.00%1100.00%

static struct spi_driver dac124s085_driver = { .probe = dac124s085_probe, .remove = dac124s085_remove, .driver = { .name = "dac124s085", }, }; module_spi_driver(dac124s085_driver); MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); MODULE_DESCRIPTION("DAC124S085 LED driver"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("spi:dac124s085");

Overall Contributors

PersonTokensPropCommitsCommitProp
Guennadi Liakhovetski46893.60%120.00%
Andrew Lunn193.80%120.00%
Bryan Wu61.20%120.00%
Anton Vorontsov51.00%120.00%
Axel Lin20.40%120.00%
Total500100.00%5100.00%
Directory: drivers/leds
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.