2019-06-04 16:11:33 +08:00
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// SPDX-License-Identifier: GPL-2.0-only
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2015-04-30 18:34:57 +08:00
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/*
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* LED Flash class driver for the AAT1290
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* 1.5A Step-Up Current Regulator for Flash LEDs
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*
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* Copyright (C) 2015, Samsung Electronics Co., Ltd.
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* Author: Jacek Anaszewski <j.anaszewski@samsung.com>
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*/
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/led-class-flash.h>
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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2015-06-19 15:33:22 +08:00
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#include <linux/pinctrl/consumer.h>
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2015-04-30 18:34:57 +08:00
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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2015-06-19 15:33:22 +08:00
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#include <media/v4l2-flash-led-class.h>
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2015-04-30 18:34:57 +08:00
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#define AAT1290_MOVIE_MODE_CURRENT_ADDR 17
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#define AAT1290_MAX_MM_CURR_PERCENT_0 16
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#define AAT1290_MAX_MM_CURR_PERCENT_100 1
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#define AAT1290_FLASH_SAFETY_TIMER_ADDR 18
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#define AAT1290_MOVIE_MODE_CONFIG_ADDR 19
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#define AAT1290_MOVIE_MODE_OFF 1
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#define AAT1290_MOVIE_MODE_ON 3
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#define AAT1290_MM_CURRENT_RATIO_ADDR 20
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#define AAT1290_MM_TO_FL_1_92 1
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#define AAT1290_MM_TO_FL_RATIO 1000 / 1920
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#define AAT1290_MAX_MM_CURRENT(fl_max) (fl_max * AAT1290_MM_TO_FL_RATIO)
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#define AAT1290_LATCH_TIME_MIN_US 500
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#define AAT1290_LATCH_TIME_MAX_US 1000
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#define AAT1290_EN_SET_TICK_TIME_US 1
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#define AAT1290_FLEN_OFF_DELAY_TIME_US 10
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#define AAT1290_FLASH_TM_NUM_LEVELS 16
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#define AAT1290_MM_CURRENT_SCALE_SIZE 15
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2019-06-10 02:19:04 +08:00
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#define AAT1290_NAME "aat1290"
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2015-04-30 18:34:57 +08:00
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struct aat1290_led_config_data {
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/* maximum LED current in movie mode */
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u32 max_mm_current;
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/* maximum LED current in flash mode */
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u32 max_flash_current;
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/* maximum flash timeout */
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u32 max_flash_tm;
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2015-06-19 15:33:22 +08:00
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/* external strobe capability */
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bool has_external_strobe;
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2015-04-30 18:34:57 +08:00
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/* max LED brightness level */
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enum led_brightness max_brightness;
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};
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struct aat1290_led {
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/* platform device data */
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struct platform_device *pdev;
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/* secures access to the device */
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struct mutex lock;
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/* corresponding LED Flash class device */
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struct led_classdev_flash fled_cdev;
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2015-06-19 15:33:22 +08:00
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/* V4L2 Flash device */
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struct v4l2_flash *v4l2_flash;
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2015-04-30 18:34:57 +08:00
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/* FLEN pin */
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struct gpio_desc *gpio_fl_en;
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/* EN|SET pin */
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struct gpio_desc *gpio_en_set;
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/* movie mode current scale */
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int *mm_current_scale;
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/* device mode */
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bool movie_mode;
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/* brightness cache */
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unsigned int torch_brightness;
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};
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static struct aat1290_led *fled_cdev_to_led(
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struct led_classdev_flash *fled_cdev)
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{
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return container_of(fled_cdev, struct aat1290_led, fled_cdev);
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}
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2015-10-07 17:10:46 +08:00
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static struct led_classdev_flash *led_cdev_to_fled_cdev(
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struct led_classdev *led_cdev)
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{
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return container_of(led_cdev, struct led_classdev_flash, led_cdev);
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}
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2015-04-30 18:34:57 +08:00
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static void aat1290_as2cwire_write(struct aat1290_led *led, int addr, int value)
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{
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int i;
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gpiod_direction_output(led->gpio_fl_en, 0);
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gpiod_direction_output(led->gpio_en_set, 0);
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udelay(AAT1290_FLEN_OFF_DELAY_TIME_US);
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/* write address */
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for (i = 0; i < addr; ++i) {
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udelay(AAT1290_EN_SET_TICK_TIME_US);
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gpiod_direction_output(led->gpio_en_set, 0);
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udelay(AAT1290_EN_SET_TICK_TIME_US);
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gpiod_direction_output(led->gpio_en_set, 1);
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}
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usleep_range(AAT1290_LATCH_TIME_MIN_US, AAT1290_LATCH_TIME_MAX_US);
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/* write data */
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for (i = 0; i < value; ++i) {
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udelay(AAT1290_EN_SET_TICK_TIME_US);
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gpiod_direction_output(led->gpio_en_set, 0);
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udelay(AAT1290_EN_SET_TICK_TIME_US);
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gpiod_direction_output(led->gpio_en_set, 1);
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}
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usleep_range(AAT1290_LATCH_TIME_MIN_US, AAT1290_LATCH_TIME_MAX_US);
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}
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static void aat1290_set_flash_safety_timer(struct aat1290_led *led,
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unsigned int micro_sec)
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{
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struct led_classdev_flash *fled_cdev = &led->fled_cdev;
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struct led_flash_setting *flash_tm = &fled_cdev->timeout;
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int flash_tm_reg = AAT1290_FLASH_TM_NUM_LEVELS -
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(micro_sec / flash_tm->step) + 1;
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aat1290_as2cwire_write(led, AAT1290_FLASH_SAFETY_TIMER_ADDR,
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flash_tm_reg);
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}
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2015-10-07 17:10:46 +08:00
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/* LED subsystem callbacks */
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static int aat1290_led_brightness_set(struct led_classdev *led_cdev,
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2015-04-30 18:34:57 +08:00
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enum led_brightness brightness)
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{
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2015-10-07 17:10:46 +08:00
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struct led_classdev_flash *fled_cdev = led_cdev_to_fled_cdev(led_cdev);
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struct aat1290_led *led = fled_cdev_to_led(fled_cdev);
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2015-04-30 18:34:57 +08:00
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mutex_lock(&led->lock);
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if (brightness == 0) {
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gpiod_direction_output(led->gpio_fl_en, 0);
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gpiod_direction_output(led->gpio_en_set, 0);
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led->movie_mode = false;
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} else {
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if (!led->movie_mode) {
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aat1290_as2cwire_write(led,
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AAT1290_MM_CURRENT_RATIO_ADDR,
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AAT1290_MM_TO_FL_1_92);
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led->movie_mode = true;
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}
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aat1290_as2cwire_write(led, AAT1290_MOVIE_MODE_CURRENT_ADDR,
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AAT1290_MAX_MM_CURR_PERCENT_0 - brightness);
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aat1290_as2cwire_write(led, AAT1290_MOVIE_MODE_CONFIG_ADDR,
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AAT1290_MOVIE_MODE_ON);
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}
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mutex_unlock(&led->lock);
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return 0;
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}
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static int aat1290_led_flash_strobe_set(struct led_classdev_flash *fled_cdev,
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bool state)
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{
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struct aat1290_led *led = fled_cdev_to_led(fled_cdev);
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struct led_classdev *led_cdev = &fled_cdev->led_cdev;
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struct led_flash_setting *timeout = &fled_cdev->timeout;
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mutex_lock(&led->lock);
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if (state) {
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aat1290_set_flash_safety_timer(led, timeout->val);
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gpiod_direction_output(led->gpio_fl_en, 1);
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} else {
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gpiod_direction_output(led->gpio_fl_en, 0);
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gpiod_direction_output(led->gpio_en_set, 0);
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}
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/*
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* To reenter movie mode after a flash event the part must be cycled
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* off and back on to reset the movie mode and reprogrammed via the
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* AS2Cwire. Therefore the brightness and movie_mode properties needs
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* to be updated here to reflect the actual state.
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*/
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led_cdev->brightness = 0;
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led->movie_mode = false;
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mutex_unlock(&led->lock);
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return 0;
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}
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static int aat1290_led_flash_timeout_set(struct led_classdev_flash *fled_cdev,
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u32 timeout)
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{
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/*
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* Don't do anything - flash timeout is cached in the led-class-flash
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* core and will be applied in the strobe_set op, as writing the
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* safety timer register spuriously turns the torch mode on.
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*/
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return 0;
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}
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static int aat1290_led_parse_dt(struct aat1290_led *led,
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2015-06-19 15:33:22 +08:00
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struct aat1290_led_config_data *cfg,
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struct device_node **sub_node)
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2015-04-30 18:34:57 +08:00
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{
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struct device *dev = &led->pdev->dev;
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struct device_node *child_node;
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2015-06-19 15:33:22 +08:00
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#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
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struct pinctrl *pinctrl;
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#endif
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2015-04-30 18:34:57 +08:00
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int ret = 0;
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2015-06-12 15:35:43 +08:00
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led->gpio_fl_en = devm_gpiod_get(dev, "flen", GPIOD_ASIS);
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2015-04-30 18:34:57 +08:00
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if (IS_ERR(led->gpio_fl_en)) {
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ret = PTR_ERR(led->gpio_fl_en);
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dev_err(dev, "Unable to claim gpio \"flen\".\n");
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return ret;
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}
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2015-06-12 15:35:43 +08:00
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led->gpio_en_set = devm_gpiod_get(dev, "enset", GPIOD_ASIS);
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2015-04-30 18:34:57 +08:00
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if (IS_ERR(led->gpio_en_set)) {
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ret = PTR_ERR(led->gpio_en_set);
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dev_err(dev, "Unable to claim gpio \"enset\".\n");
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return ret;
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}
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2015-06-19 15:33:22 +08:00
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#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
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pinctrl = devm_pinctrl_get_select_default(&led->pdev->dev);
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if (IS_ERR(pinctrl)) {
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cfg->has_external_strobe = false;
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dev_info(dev,
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"No support for external strobe detected.\n");
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} else {
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cfg->has_external_strobe = true;
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}
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#endif
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2015-04-30 18:34:57 +08:00
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child_node = of_get_next_available_child(dev->of_node, NULL);
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if (!child_node) {
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dev_err(dev, "No DT child node found for connected LED.\n");
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return -EINVAL;
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}
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ret = of_property_read_u32(child_node, "led-max-microamp",
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&cfg->max_mm_current);
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/*
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* led-max-microamp will default to 1/20 of flash-max-microamp
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* in case it is missing.
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*/
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if (ret < 0)
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dev_warn(dev,
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"led-max-microamp DT property missing\n");
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ret = of_property_read_u32(child_node, "flash-max-microamp",
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&cfg->max_flash_current);
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if (ret < 0) {
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dev_err(dev,
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"flash-max-microamp DT property missing\n");
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2015-11-25 16:22:19 +08:00
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goto err_parse_dt;
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2015-04-30 18:34:57 +08:00
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}
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ret = of_property_read_u32(child_node, "flash-max-timeout-us",
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&cfg->max_flash_tm);
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if (ret < 0) {
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dev_err(dev,
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"flash-max-timeout-us DT property missing\n");
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2015-11-25 16:22:19 +08:00
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goto err_parse_dt;
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2015-04-30 18:34:57 +08:00
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}
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2015-06-19 15:33:22 +08:00
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*sub_node = child_node;
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2015-11-25 16:22:19 +08:00
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err_parse_dt:
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of_node_put(child_node);
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2015-04-30 18:34:57 +08:00
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return ret;
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}
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static void aat1290_led_validate_mm_current(struct aat1290_led *led,
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struct aat1290_led_config_data *cfg)
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{
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int i, b = 0, e = AAT1290_MM_CURRENT_SCALE_SIZE;
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while (e - b > 1) {
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i = b + (e - b) / 2;
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if (cfg->max_mm_current < led->mm_current_scale[i])
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e = i;
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else
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b = i;
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}
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cfg->max_mm_current = led->mm_current_scale[b];
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cfg->max_brightness = b + 1;
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}
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2015-09-04 18:27:09 +08:00
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static int init_mm_current_scale(struct aat1290_led *led,
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2015-04-30 18:34:57 +08:00
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struct aat1290_led_config_data *cfg)
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{
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2017-08-24 21:00:52 +08:00
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static const int max_mm_current_percent[] = {
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20, 22, 25, 28, 32, 36, 40, 45, 50, 56,
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63, 71, 79, 89, 100
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};
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2015-04-30 18:34:57 +08:00
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int i, max_mm_current =
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AAT1290_MAX_MM_CURRENT(cfg->max_flash_current);
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2015-06-19 15:33:22 +08:00
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led->mm_current_scale = devm_kzalloc(&led->pdev->dev,
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sizeof(max_mm_current_percent),
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2015-04-30 18:34:57 +08:00
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GFP_KERNEL);
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if (!led->mm_current_scale)
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return -ENOMEM;
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for (i = 0; i < AAT1290_MM_CURRENT_SCALE_SIZE; ++i)
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led->mm_current_scale[i] = max_mm_current *
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max_mm_current_percent[i] / 100;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int aat1290_led_get_configuration(struct aat1290_led *led,
|
2015-06-19 15:33:22 +08:00
|
|
|
struct aat1290_led_config_data *cfg,
|
|
|
|
struct device_node **sub_node)
|
2015-04-30 18:34:57 +08:00
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
2015-06-19 15:33:22 +08:00
|
|
|
ret = aat1290_led_parse_dt(led, cfg, sub_node);
|
2015-04-30 18:34:57 +08:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
/*
|
|
|
|
* Init non-linear movie mode current scale basing
|
|
|
|
* on the max flash current from led configuration.
|
|
|
|
*/
|
|
|
|
ret = init_mm_current_scale(led, cfg);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
aat1290_led_validate_mm_current(led, cfg);
|
|
|
|
|
2015-06-19 15:33:22 +08:00
|
|
|
#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
|
|
|
|
#else
|
|
|
|
devm_kfree(&led->pdev->dev, led->mm_current_scale);
|
|
|
|
#endif
|
2015-04-30 18:34:57 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void aat1290_init_flash_timeout(struct aat1290_led *led,
|
|
|
|
struct aat1290_led_config_data *cfg)
|
|
|
|
{
|
|
|
|
struct led_classdev_flash *fled_cdev = &led->fled_cdev;
|
|
|
|
struct led_flash_setting *setting;
|
|
|
|
|
|
|
|
/* Init flash timeout setting */
|
|
|
|
setting = &fled_cdev->timeout;
|
|
|
|
setting->min = cfg->max_flash_tm / AAT1290_FLASH_TM_NUM_LEVELS;
|
|
|
|
setting->max = cfg->max_flash_tm;
|
|
|
|
setting->step = setting->min;
|
|
|
|
setting->val = setting->max;
|
|
|
|
}
|
|
|
|
|
2015-06-19 15:33:22 +08:00
|
|
|
#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
|
|
|
|
static enum led_brightness aat1290_intensity_to_brightness(
|
|
|
|
struct v4l2_flash *v4l2_flash,
|
|
|
|
s32 intensity)
|
|
|
|
{
|
|
|
|
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
|
|
|
|
struct aat1290_led *led = fled_cdev_to_led(fled_cdev);
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = AAT1290_MM_CURRENT_SCALE_SIZE - 1; i >= 0; --i)
|
|
|
|
if (intensity >= led->mm_current_scale[i])
|
|
|
|
return i + 1;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static s32 aat1290_brightness_to_intensity(struct v4l2_flash *v4l2_flash,
|
|
|
|
enum led_brightness brightness)
|
|
|
|
{
|
|
|
|
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
|
|
|
|
struct aat1290_led *led = fled_cdev_to_led(fled_cdev);
|
|
|
|
|
|
|
|
return led->mm_current_scale[brightness - 1];
|
|
|
|
}
|
|
|
|
|
|
|
|
static int aat1290_led_external_strobe_set(struct v4l2_flash *v4l2_flash,
|
|
|
|
bool enable)
|
|
|
|
{
|
|
|
|
struct aat1290_led *led = fled_cdev_to_led(v4l2_flash->fled_cdev);
|
|
|
|
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
|
|
|
|
struct led_classdev *led_cdev = &fled_cdev->led_cdev;
|
|
|
|
struct pinctrl *pinctrl;
|
|
|
|
|
|
|
|
gpiod_direction_output(led->gpio_fl_en, 0);
|
|
|
|
gpiod_direction_output(led->gpio_en_set, 0);
|
|
|
|
|
|
|
|
led->movie_mode = false;
|
|
|
|
led_cdev->brightness = 0;
|
|
|
|
|
|
|
|
pinctrl = devm_pinctrl_get_select(&led->pdev->dev,
|
|
|
|
enable ? "isp" : "host");
|
|
|
|
if (IS_ERR(pinctrl)) {
|
|
|
|
dev_warn(&led->pdev->dev, "Unable to switch strobe source.\n");
|
|
|
|
return PTR_ERR(pinctrl);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void aat1290_init_v4l2_flash_config(struct aat1290_led *led,
|
|
|
|
struct aat1290_led_config_data *led_cfg,
|
|
|
|
struct v4l2_flash_config *v4l2_sd_cfg)
|
|
|
|
{
|
|
|
|
struct led_classdev *led_cdev = &led->fled_cdev.led_cdev;
|
|
|
|
struct led_flash_setting *s;
|
|
|
|
|
2019-06-10 02:19:04 +08:00
|
|
|
strlcpy(v4l2_sd_cfg->dev_name, led_cdev->dev->kobj.name,
|
2015-06-19 15:33:22 +08:00
|
|
|
sizeof(v4l2_sd_cfg->dev_name));
|
|
|
|
|
2017-07-18 21:26:59 +08:00
|
|
|
s = &v4l2_sd_cfg->intensity;
|
2015-06-19 15:33:22 +08:00
|
|
|
s->min = led->mm_current_scale[0];
|
|
|
|
s->max = led_cfg->max_mm_current;
|
|
|
|
s->step = 1;
|
|
|
|
s->val = s->max;
|
|
|
|
|
|
|
|
v4l2_sd_cfg->has_external_strobe = led_cfg->has_external_strobe;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct v4l2_flash_ops v4l2_flash_ops = {
|
|
|
|
.external_strobe_set = aat1290_led_external_strobe_set,
|
|
|
|
.intensity_to_led_brightness = aat1290_intensity_to_brightness,
|
|
|
|
.led_brightness_to_intensity = aat1290_brightness_to_intensity,
|
|
|
|
};
|
|
|
|
#else
|
|
|
|
static inline void aat1290_init_v4l2_flash_config(struct aat1290_led *led,
|
|
|
|
struct aat1290_led_config_data *led_cfg,
|
|
|
|
struct v4l2_flash_config *v4l2_sd_cfg)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
static const struct v4l2_flash_ops v4l2_flash_ops;
|
|
|
|
#endif
|
|
|
|
|
2015-04-30 18:34:57 +08:00
|
|
|
static const struct led_flash_ops flash_ops = {
|
|
|
|
.strobe_set = aat1290_led_flash_strobe_set,
|
|
|
|
.timeout_set = aat1290_led_flash_timeout_set,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int aat1290_led_probe(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct device *dev = &pdev->dev;
|
2015-06-19 15:33:22 +08:00
|
|
|
struct device_node *sub_node = NULL;
|
2015-04-30 18:34:57 +08:00
|
|
|
struct aat1290_led *led;
|
|
|
|
struct led_classdev *led_cdev;
|
|
|
|
struct led_classdev_flash *fled_cdev;
|
2019-06-10 02:19:04 +08:00
|
|
|
struct led_init_data init_data = {};
|
2015-04-30 18:34:57 +08:00
|
|
|
struct aat1290_led_config_data led_cfg = {};
|
2015-06-19 15:33:22 +08:00
|
|
|
struct v4l2_flash_config v4l2_sd_cfg = {};
|
2015-04-30 18:34:57 +08:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
|
|
|
|
if (!led)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
led->pdev = pdev;
|
|
|
|
platform_set_drvdata(pdev, led);
|
|
|
|
|
|
|
|
fled_cdev = &led->fled_cdev;
|
|
|
|
fled_cdev->ops = &flash_ops;
|
|
|
|
led_cdev = &fled_cdev->led_cdev;
|
|
|
|
|
2015-06-19 15:33:22 +08:00
|
|
|
ret = aat1290_led_get_configuration(led, &led_cfg, &sub_node);
|
2015-04-30 18:34:57 +08:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
mutex_init(&led->lock);
|
|
|
|
|
|
|
|
/* Initialize LED Flash class device */
|
2015-10-07 17:10:46 +08:00
|
|
|
led_cdev->brightness_set_blocking = aat1290_led_brightness_set;
|
2015-04-30 18:34:57 +08:00
|
|
|
led_cdev->max_brightness = led_cfg.max_brightness;
|
|
|
|
led_cdev->flags |= LED_DEV_CAP_FLASH;
|
|
|
|
|
|
|
|
aat1290_init_flash_timeout(led, &led_cfg);
|
|
|
|
|
2019-06-10 02:19:04 +08:00
|
|
|
init_data.fwnode = of_fwnode_handle(sub_node);
|
|
|
|
init_data.devicename = AAT1290_NAME;
|
|
|
|
|
2015-04-30 18:34:57 +08:00
|
|
|
/* Register LED Flash class device */
|
2019-06-10 02:19:04 +08:00
|
|
|
ret = led_classdev_flash_register_ext(&pdev->dev, fled_cdev,
|
|
|
|
&init_data);
|
2015-04-30 18:34:57 +08:00
|
|
|
if (ret < 0)
|
|
|
|
goto err_flash_register;
|
|
|
|
|
2015-06-19 15:33:22 +08:00
|
|
|
aat1290_init_v4l2_flash_config(led, &led_cfg, &v4l2_sd_cfg);
|
|
|
|
|
|
|
|
/* Create V4L2 Flash subdev. */
|
2016-08-31 15:28:46 +08:00
|
|
|
led->v4l2_flash = v4l2_flash_init(dev, of_fwnode_handle(sub_node),
|
2017-07-18 21:26:59 +08:00
|
|
|
fled_cdev, &v4l2_flash_ops,
|
2016-08-31 15:28:46 +08:00
|
|
|
&v4l2_sd_cfg);
|
2015-06-19 15:33:22 +08:00
|
|
|
if (IS_ERR(led->v4l2_flash)) {
|
|
|
|
ret = PTR_ERR(led->v4l2_flash);
|
|
|
|
goto error_v4l2_flash_init;
|
|
|
|
}
|
|
|
|
|
2015-04-30 18:34:57 +08:00
|
|
|
return 0;
|
|
|
|
|
2015-06-19 15:33:22 +08:00
|
|
|
error_v4l2_flash_init:
|
|
|
|
led_classdev_flash_unregister(fled_cdev);
|
2015-04-30 18:34:57 +08:00
|
|
|
err_flash_register:
|
|
|
|
mutex_destroy(&led->lock);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int aat1290_led_remove(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct aat1290_led *led = platform_get_drvdata(pdev);
|
|
|
|
|
2015-06-19 15:33:22 +08:00
|
|
|
v4l2_flash_release(led->v4l2_flash);
|
2015-04-30 18:34:57 +08:00
|
|
|
led_classdev_flash_unregister(&led->fled_cdev);
|
|
|
|
|
|
|
|
mutex_destroy(&led->lock);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct of_device_id aat1290_led_dt_match[] = {
|
|
|
|
{ .compatible = "skyworks,aat1290" },
|
|
|
|
{},
|
|
|
|
};
|
2015-09-02 05:35:07 +08:00
|
|
|
MODULE_DEVICE_TABLE(of, aat1290_led_dt_match);
|
2015-04-30 18:34:57 +08:00
|
|
|
|
|
|
|
static struct platform_driver aat1290_led_driver = {
|
|
|
|
.probe = aat1290_led_probe,
|
|
|
|
.remove = aat1290_led_remove,
|
|
|
|
.driver = {
|
|
|
|
.name = "aat1290",
|
|
|
|
.of_match_table = aat1290_led_dt_match,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
module_platform_driver(aat1290_led_driver);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>");
|
|
|
|
MODULE_DESCRIPTION("Skyworks Current Regulator for Flash LEDs");
|
|
|
|
MODULE_LICENSE("GPL v2");
|