257 lines
6.1 KiB
C
257 lines
6.1 KiB
C
/*
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* Copyright (C) 2017 The M.A.D. Team
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* Fixed for M2 Mini by Dinolek
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* Ported to M2 Note by Moyster
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "Lights"
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#include <cutils/log.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <hardware/lights.h>
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static pthread_once_t g_init = PTHREAD_ONCE_INIT;
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static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
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static struct light_state_t g_attention;
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static struct light_state_t g_notification;
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char const *const LCD_FILE = "/sys/class/leds/lcd-backlight/brightness";
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char const *const LEDS_FILE = "/sys/class/leds/button-backlight/trigger";
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/* device methods */
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void init_globals(void)
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{
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/* init the mutex */
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pthread_mutex_init(&g_lock, NULL);
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}
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static int write_int(char const *path, int value)
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{
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int fd;
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static int already_warned;
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fd = open(path, O_RDWR);
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if (fd >= 0) {
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char buffer[20];
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int bytes = snprintf(buffer, sizeof(buffer), "%d\n", value);
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ssize_t amt = write(fd, buffer, (size_t)bytes);
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close(fd);
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return amt == -1 ? -errno : 0;
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} else {
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if (already_warned == 0) {
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ALOGE("Write_int failed to open %s\n", path);
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already_warned = 1;
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}
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return -errno;
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}
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}
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static int write_str(char const *path, char *str)
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{
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int fd;
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fd = open(path, O_WRONLY);
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if (fd >= 0) {
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char buffer[20];
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int bytes = snprintf(buffer, sizeof(buffer), "%s", str);
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ssize_t amt = write(fd, buffer, (size_t)bytes);
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close(fd);
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return amt == -1 ? -errno : 0;
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} else {
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return -errno;
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}
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}
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static int is_lit(struct light_state_t const *state)
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{
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return state->color & 0x00ffffff;
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}
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static int rgb_to_brightness(struct light_state_t const *state)
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{
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int color = state->color & 0x00ffffff;
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return ((77*((color>>16)&0x00ff))
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+ (150*((color>>8)&0x00ff)) + (29*(color&0x00ff))) >> 8;
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}
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static int set_speaker_light_locked(struct light_device_t *dev,
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struct light_state_t const *state)
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{
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if (!dev)
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return -1;
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if (state) {
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write_str(LEDS_FILE, "timer");
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}
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return 0;
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}
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static int unset_speaker_light_locked(struct light_device_t *dev)
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{
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if (!dev)
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return -1;
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write_str(LEDS_FILE, "none");
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return 0;
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}
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static void handle_speaker_light_locked(struct light_device_t *dev)
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{
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if (is_lit(&g_attention))
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set_speaker_light_locked(dev, &g_attention);
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else if (is_lit(&g_notification))
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set_speaker_light_locked(dev, &g_notification);
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else
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unset_speaker_light_locked(dev);
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}
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static int set_light_notifications(struct light_device_t *dev,
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struct light_state_t const *state)
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{
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pthread_mutex_lock(&g_lock);
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unsigned int brightness;
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unsigned int color;
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unsigned int rgb[3];
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g_notification = *state;
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/* If a brightness has been applied by the user */
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brightness = (g_notification.color & 0xFF000000) >> 24;
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if (brightness > 0 && brightness < 0xFF) {
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/* Retrieve each of the RGB colors */
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color = g_notification.color & 0x00FFFFFF;
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rgb[0] = (color >> 16) & 0xFF;
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rgb[1] = (color >> 8) & 0xFF;
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rgb[2] = color & 0xFF;
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/* Apply the brightness level */
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if (rgb[0] > 0)
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rgb[0] = (rgb[0] * brightness) / 0xFF;
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if (rgb[1] > 0)
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rgb[1] = (rgb[1] * brightness) / 0xFF;
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if (rgb[2] > 0)
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rgb[2] = (rgb[2] * brightness) / 0xFF;
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/* Update with the new color */
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g_notification.color = (rgb[0] << 16) + (rgb[1] << 8) + rgb[2];
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}
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handle_speaker_light_locked(dev);
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pthread_mutex_unlock(&g_lock);
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return 0;
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}
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static int set_light_attention(struct light_device_t *dev,
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struct light_state_t const *state)
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{
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pthread_mutex_lock(&g_lock);
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g_attention = *state;
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handle_speaker_light_locked(dev);
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pthread_mutex_unlock(&g_lock);
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return 0;
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}
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static int set_light_backlight(struct light_device_t *dev,
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struct light_state_t const *state)
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{
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if (!dev) {
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return -1;
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}
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int err = 0;
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int brightness = rgb_to_brightness(state);
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pthread_mutex_lock(&g_lock);
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err = write_int(LCD_FILE, brightness);
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pthread_mutex_unlock(&g_lock);
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return err;
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}
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/* Close the lights device */
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static int close_lights(struct light_device_t *dev)
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{
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if (dev) {
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free(dev);
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}
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return 0;
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}
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/* module methods */
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/* Open a new instance of a lights device using name */
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static int open_lights(const struct hw_module_t *module, char const *name,
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struct hw_device_t **device)
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{
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int (*set_light)(struct light_device_t *dev,
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struct light_state_t const *state);
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if (strcmp(LIGHT_ID_BACKLIGHT, name) == 0)
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set_light = set_light_backlight;
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else if (strcmp(LIGHT_ID_NOTIFICATIONS, name) == 0)
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set_light = set_light_notifications;
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else if (strcmp(LIGHT_ID_ATTENTION, name) == 0)
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set_light = set_light_attention;
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else
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return -EINVAL;
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pthread_once(&g_init, init_globals);
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struct light_device_t *dev = malloc(sizeof(struct light_device_t));
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if (!dev)
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return -ENOMEM;
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memset(dev, 0, sizeof(*dev));
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dev->common.tag = HARDWARE_DEVICE_TAG;
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dev->common.version = 0;
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dev->common.module = (struct hw_module_t *)module;
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dev->common.close = (int (*)(struct hw_device_t *))close_lights;
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dev->set_light = set_light;
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*device = (struct hw_device_t *)dev;
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return 0;
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}
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static struct hw_module_methods_t lights_module_methods = {
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.open = open_lights,
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};
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/* The lights Module */
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struct hw_module_t HAL_MODULE_INFO_SYM = {
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.tag = HARDWARE_MODULE_TAG,
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.version_major = 1,
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.version_minor = 0,
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.id = LIGHTS_HARDWARE_MODULE_ID,
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.name = "Meizu Lights Module",
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.author = "Mediatek",
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.methods = &lights_module_methods,
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};
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