564 lines
16 KiB
C
564 lines
16 KiB
C
/*
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* LED driver - leds-ktd2692.c
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*
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* Copyright (C) 2013 Sunggeun Yim <sunggeun.yim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/pwm.h>
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#include <linux/vmalloc.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/gpio.h>
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#include <linux/leds-ktd2692.h>
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#include <linux/time.h>
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#ifdef CONFIG_OF
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#endif
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//#define DEBUG_LED_TIME
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extern struct class *camera_class; /*sys/class/camera*/
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struct device *ktd2692_dev;
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struct ktd2692_platform_data *global_ktd2692data = NULL;
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struct device *global_dev;
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void ktd2692_setGpio(int onoff)
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{
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if (onoff) {
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__gpio_set_value(global_ktd2692data->flash_control, 1);
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} else {
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__gpio_set_value(global_ktd2692data->flash_control, 0);
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}
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}
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void ktd2692_set_low_bit(void)
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{
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#ifdef DEBUG_LED_TIME
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struct timeval start_low, end_low, start_high, end_high;
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unsigned long time_low, time_high;
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#endif
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#ifdef DEBUG_LED_TIME
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do_gettimeofday(&start_low);
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#endif
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__gpio_set_value(global_ktd2692data->flash_control, 0);
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udelay(T_L_LB);
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#ifdef DEBUG_LED_TIME
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do_gettimeofday(&end_low);
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do_gettimeofday(&start_high);
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#endif
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__gpio_set_value(global_ktd2692data->flash_control, 1);
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udelay(T_H_LB);
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#ifdef DEBUG_LED_TIME
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do_gettimeofday(&end_high);
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time_low = (end_low.tv_sec - start_low.tv_sec) * 1000000 + (end_low.tv_usec - start_low.tv_usec);
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time_high = (end_high.tv_sec - start_high.tv_sec) * 1000000 + (end_high.tv_usec - start_high.tv_usec);
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LED_INFO("[ta] LOW BIT: time_low(%lu) / time_high(%lu)\n", time_low, time_high);
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if (time_low <= (time_high*2))
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LED_ERROR("[ta] Low Bit: high pulse too long\n");
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#endif
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}
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void ktd2692_set_high_bit(void)
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{
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#ifdef DEBUG_LED_TIME
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struct timeval start_low, end_low, start_high, end_high;
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unsigned long time_low, time_high;
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#endif
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#ifdef DEBUG_LED_TIME
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do_gettimeofday(&start_low);
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#endif
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__gpio_set_value(global_ktd2692data->flash_control, 0);
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udelay(T_L_HB);
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#ifdef DEBUG_LED_TIME
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do_gettimeofday(&end_low);
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do_gettimeofday(&start_high);
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#endif
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__gpio_set_value(global_ktd2692data->flash_control, 1);
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udelay(T_H_HB);
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#ifdef DEBUG_LED_TIME
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do_gettimeofday(&end_high);
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time_low = (end_low.tv_sec - start_low.tv_sec) * 1000000 + (end_low.tv_usec - start_low.tv_usec);
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time_high = (end_high.tv_sec - start_high.tv_sec) * 1000000 + (end_high.tv_usec - start_high.tv_usec);
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LED_INFO("[ta] HIGHT BIT: time_low(%lu) / time_high(%lu)\n", time_low, time_high);
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if ((time_low*2) >= time_high)
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LED_ERROR("[ta] HIGH BIT: low pulse too long\n");
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#endif
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}
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static int ktd2692_set_bit(unsigned int bit)
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{
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if (bit) {
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ktd2692_set_high_bit();
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} else {
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ktd2692_set_low_bit();
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}
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return 0;
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}
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static int ktd2692_write_data(unsigned data)
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{
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int err = 0;
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unsigned int bit = 0;
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/* Data Start Condition */
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__gpio_set_value(global_ktd2692data->flash_control, 1);
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udelay(T_SOD);
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/* BIT 7*/
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bit = ((data>> 7) & 0x01);
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ktd2692_set_bit(bit);
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/* BIT 6 */
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bit = ((data>> 6) & 0x01);
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ktd2692_set_bit(bit);
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/* BIT 5*/
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bit = ((data>> 5) & 0x01);
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ktd2692_set_bit(bit);
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/* BIT 4 */
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bit = ((data>> 4) & 0x01);
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ktd2692_set_bit(bit);
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/* BIT 3*/
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bit = ((data>> 3) & 0x01);
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ktd2692_set_bit(bit);
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/* BIT 2 */
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bit = ((data>> 2) & 0x01);
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ktd2692_set_bit(bit);
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/* BIT 1*/
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bit = ((data>> 1) & 0x01);
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ktd2692_set_bit(bit);
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/* BIT 0 */
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bit = ((data>> 0) & 0x01);
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ktd2692_set_bit(bit);
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__gpio_set_value(global_ktd2692data->flash_control, 0);
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udelay(T_EOD_L);
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/* Data End Condition */
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__gpio_set_value(global_ktd2692data->flash_control, 1);
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udelay(T_EOD_H);
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return err;
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}
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ssize_t ktd2692_store(struct device *dev,
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struct device_attribute *attr, const char *buf,
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size_t count)
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{
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int value = 0;
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int brightness_value = 0;
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int ret = 0;
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unsigned long flags = 0;
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int torch_intensity = -1;
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struct pinctrl *pinctrl;
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if ((buf == NULL) || kstrtouint(buf, 10, &value)) {
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return -1;
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}
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if (global_ktd2692data == NULL) {
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LED_ERROR("KTD2692(%s) global_ktd2692data is not initialized.\n", __func__);
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return -EFAULT;
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}
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global_ktd2692data->sysfs_input_data = value;
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if (value <= 0) {
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ret = gpio_request(global_ktd2692data->flash_control, "ktd2692_led_control");
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if (ret) {
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LED_ERROR("Failed to requeset ktd2692_led_control\n");
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} else {
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LED_INFO("KTD2692-TORCH OFF. : E(%d)\n", value);
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global_ktd2692data->mode_status = KTD2692_DISABLES_MOVIE_FLASH_MODE;
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spin_lock_irqsave(&global_ktd2692data->int_lock, flags);
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ktd2692_write_data(global_ktd2692data->mode_status|
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KTD2692_ADDR_MOVIE_FLASHMODE_CONTROL);
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spin_unlock_irqrestore(&global_ktd2692data->int_lock, flags);
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ktd2692_setGpio(0);
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gpio_free(global_ktd2692data->flash_control);
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global_ktd2692data->is_torch_enable = false;
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LED_INFO("KTD2692-TORCH OFF. : X(%d)\n", value);
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}
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pinctrl = devm_pinctrl_get_select(global_dev, "is");
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if (IS_ERR(pinctrl))
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pr_err("%s: flash %s pins are not configured\n", __func__, "is");
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} else {
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pinctrl = devm_pinctrl_get_select(global_dev, "host");
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if (IS_ERR(pinctrl))
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pr_err("%s: flash %s pins are not configured\n", __func__, "host");
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ret = gpio_request(global_ktd2692data->flash_control, "ktd2692_led_control");
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if (ret) {
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LED_ERROR("Failed to requeset ktd2692_led_control\n");
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} else {
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LED_INFO("KTD2692-TORCH ON. : E(%d)\n", value);
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global_ktd2692data->mode_status = KTD2692_ENABLE_MOVIE_MODE;
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global_ktd2692data->is_torch_enable = true;
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spin_lock_irqsave(&global_ktd2692data->int_lock, flags);
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ktd2692_write_data(global_ktd2692data->LVP_Voltage|
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KTD2692_ADDR_LVP_SETTING);
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#if 0 /* use the internel defualt setting */
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ktd2692_write_data(global_ktd2692data->flash_timeout|
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KTD2692_ADDR_FLASH_TIMEOUT_SETTING);
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#endif
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if (value == 100) {
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ktd2692_write_data(global_ktd2692data->factory_current_value|
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KTD2692_ADDR_MOVIE_CURRENT_SETTING);
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} else if (1001 <= value && value <= 1010) {
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brightness_value = value - 1001;
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if (global_ktd2692data->torch_table[brightness_value] != 0) {
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torch_intensity = KTD2692_CAL_MOVIE_CURRENT(KTD2692_TORCH_STEP_LEVEL_CURRENT(global_ktd2692data->torch_table[brightness_value], global_ktd2692data->max_current),
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global_ktd2692data->max_current);
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}
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if (torch_intensity < 0) {
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LED_INFO("KTD2692-force to set as default : %d\n", global_ktd2692data->torch_current_value);
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torch_intensity = global_ktd2692data->torch_current_value;
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}
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ktd2692_write_data(torch_intensity|
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KTD2692_ADDR_MOVIE_CURRENT_SETTING);
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} else {
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ktd2692_write_data(global_ktd2692data->torch_current_value|
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KTD2692_ADDR_MOVIE_CURRENT_SETTING);
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}
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ktd2692_write_data(global_ktd2692data->mode_status|
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KTD2692_ADDR_MOVIE_FLASHMODE_CONTROL);
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spin_unlock_irqrestore(&global_ktd2692data->int_lock, flags);
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gpio_free(global_ktd2692data->flash_control);
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LED_INFO("KTD2692-TORCH ON. : X(%d)\n", value);
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}
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}
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if (!IS_ERR(pinctrl))
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devm_pinctrl_put(pinctrl);
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return count;
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}
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EXPORT_SYMBOL(ktd2692_led_mode_ctrl);
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int32_t ktd2692_led_mode_ctrl(int state)
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{
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int ret = 0;
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unsigned long flags = 0;
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struct pinctrl *pinctrl;
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if (global_ktd2692data == NULL) {
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LED_ERROR("KTD2692(%s) global_ktd2692data is not initialized.\n", __func__);
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return -EFAULT;
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}
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switch(state) {
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case 1:
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/* FlashLight Mode OFF */
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ret = gpio_request(global_ktd2692data->flash_control, "ktd2692_led_control");
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if (ret) {
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LED_ERROR("Failed to request ktd2692_led_mode_ctrl\n");
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} else {
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LED_INFO("KTD2692-FLASH OFF E(%d)\n", state);
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global_ktd2692data->mode_status = KTD2692_DISABLES_MOVIE_FLASH_MODE;
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spin_lock_irqsave(&global_ktd2692data->int_lock, flags);
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ktd2692_write_data(global_ktd2692data->mode_status|
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KTD2692_ADDR_MOVIE_FLASHMODE_CONTROL);
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spin_unlock_irqrestore(&global_ktd2692data->int_lock, flags);
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ktd2692_setGpio(0);
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gpio_free(global_ktd2692data->flash_control);
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global_ktd2692data->is_torch_enable = false;
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LED_INFO("KTD2692-FLASH OFF X(%d)\n", state);
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}
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break;
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case 2:
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/* FlashLight Mode Flash */
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pinctrl = devm_pinctrl_get_select(global_dev, "host");
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if (IS_ERR(pinctrl))
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pr_err("%s: flash %s pins are not configured\n", __func__, "host");
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ret = gpio_request(global_ktd2692data->flash_control, "ktd2692_led_control");
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if (ret) {
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LED_ERROR("Failed to request ktd2692_led_mode_ctrl\n");
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} else {
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LED_INFO("KTD2692-FLASH ON E(%d)\n", state);
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global_ktd2692data->mode_status = KTD2692_ENABLE_FLASH_MODE;
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spin_lock_irqsave(&global_ktd2692data->int_lock, flags);
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ktd2692_write_data(global_ktd2692data->LVP_Voltage|
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KTD2692_ADDR_LVP_SETTING);
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ktd2692_write_data(global_ktd2692data->flash_current_value|
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KTD2692_ADDR_FLASH_CURRENT_SETTING);
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ktd2692_write_data(global_ktd2692data->mode_status|
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KTD2692_ADDR_MOVIE_FLASHMODE_CONTROL);
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spin_unlock_irqrestore(&global_ktd2692data->int_lock, flags);
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gpio_free(global_ktd2692data->flash_control);
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LED_INFO("KTD2692-FLASH ON X(%d)\n", state);
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}
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break;
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case 3:
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/* FlashLight Mode TORCH */
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pinctrl = devm_pinctrl_get_select(global_dev, "host");
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if (IS_ERR(pinctrl))
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pr_err("%s: flash %s pins are not configured\n", __func__, "host");
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if (global_ktd2692data->is_torch_enable == true) {
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LED_INFO("KTD2692-TORCH is already ON\n");
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return 0;
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}
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ret = gpio_request(global_ktd2692data->flash_control, "ktd2692_led_control");
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if (ret) {
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LED_ERROR("Failed to request ktd2692_led_mode_ctrl\n");
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} else {
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LED_INFO("KTD2692-TORCH ON E(%d) movie current [%d] \n", state, global_ktd2692data->movie_current_value);
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global_ktd2692data->mode_status = KTD2692_ENABLE_MOVIE_MODE;
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spin_lock_irqsave(&global_ktd2692data->int_lock, flags);
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ktd2692_write_data(global_ktd2692data->LVP_Voltage|
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KTD2692_ADDR_LVP_SETTING);
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ktd2692_write_data(global_ktd2692data->movie_current_value|
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KTD2692_ADDR_MOVIE_CURRENT_SETTING);
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ktd2692_write_data(global_ktd2692data->mode_status|
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KTD2692_ADDR_MOVIE_FLASHMODE_CONTROL);
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spin_unlock_irqrestore(&global_ktd2692data->int_lock, flags);
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gpio_free(global_ktd2692data->flash_control);
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LED_INFO("KTD2692-TORCH ON X(%d)\n", state);
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}
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break;
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default:
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/* FlashLight Mode OFF */
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ret = gpio_request(global_ktd2692data->flash_control, "ktd2692_led_control");
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if (ret) {
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LED_ERROR("Failed to request ktd2692_led_mode_ctrl\n");
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} else {
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LED_INFO("KTD2692-FLASH OFF E(%d)\n", state);
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global_ktd2692data->mode_status = KTD2692_DISABLES_MOVIE_FLASH_MODE;
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spin_lock_irqsave(&global_ktd2692data->int_lock, flags);
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ktd2692_write_data(global_ktd2692data->mode_status|
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KTD2692_ADDR_MOVIE_FLASHMODE_CONTROL);
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spin_unlock_irqrestore(&global_ktd2692data->int_lock, flags);
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ktd2692_setGpio(0);
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gpio_free(global_ktd2692data->flash_control);
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LED_INFO("KTD2692-FLASH OFF X(%d)\n", state);
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}
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break;
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}
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return ret;
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}
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ssize_t ktd2692_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "%d\n", global_ktd2692data->sysfs_input_data);
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}
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static DEVICE_ATTR(rear_flash, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH,
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ktd2692_show, ktd2692_store);
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static DEVICE_ATTR(rear_torch_flash, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH,
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ktd2692_show, ktd2692_store);
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static int ktd2692_parse_dt(struct device *dev,
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struct ktd2692_platform_data *pdata)
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{
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struct device_node *dnode = dev->of_node;
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u32 buffer = 0;
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int ret = 0;
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u32 torch_table_enable = 0;
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/* Defulat Value */
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pdata->LVP_Voltage = KTD2692_DISABLE_LVP;
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pdata->flash_timeout = KTD2692_TIMER_1049ms; /* default */
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pdata->min_current_value = KTD2692_MIN_CURRENT_240mA;
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pdata->flash_current_value = KTD2692_FLASH_CURRENT(KTD2692_FLASH_DEFAULT_CURRENT, KTD2692_MAX_CURRENT);
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pdata->movie_current_value = KTD2692_MOVIE_CURRENT(KTD2692_MOVIE_DEFAULT_CURRENT, KTD2692_MAX_CURRENT);
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pdata->factory_current_value = KTD2692_MOVIE_CURRENT(KTD2692_FACTORY_DEFAULT_CURRENT, KTD2692_MAX_CURRENT);
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pdata->torch_current_value = KTD2692_MOVIE_CURRENT(KTD2692_TORCH_DEFAULT_CURRENT, KTD2692_MAX_CURRENT);
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pdata->mode_status = KTD2692_DISABLES_MOVIE_FLASH_MODE;
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/* get gpio */
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pdata->flash_control = of_get_named_gpio(dnode, "flash_control", 0);
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if (!gpio_is_valid(pdata->flash_control)) {
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dev_err(dev, "failed to get flash_control\n");
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return -1;
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}
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/* get max current value */
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if (of_property_read_u32(dnode, "max_current", &buffer) == 0) {
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dev_info(dev, "max_current = <%d>\n",
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buffer);
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pdata->max_current = buffer;
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}
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/* get flash current value */
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if (of_property_read_u32(dnode, "flash_current", &buffer) == 0) {
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dev_info(dev, "flash_current = <%d><%d>\n",
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buffer, KTD2692_FLASH_CURRENT(buffer, pdata->max_current));
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pdata->flash_current_value = KTD2692_FLASH_CURRENT(buffer, pdata->max_current);
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}
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/* get movie current value */
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if (of_property_read_u32(dnode, "movie_current", &buffer) == 0) {
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dev_info(dev, "movie_current = <%d><%d>\n",
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buffer, KTD2692_MOVIE_CURRENT(buffer, pdata->max_current));
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pdata->movie_current_value = KTD2692_MOVIE_CURRENT(buffer, pdata->max_current);
|
|
}
|
|
|
|
/* get factory current value */
|
|
if (of_property_read_u32(dnode, "factory_current", &buffer) == 0) {
|
|
dev_info(dev, "factory_current = <%d><%d>\n",
|
|
buffer, KTD2692_MOVIE_CURRENT(buffer, pdata->max_current));
|
|
pdata->factory_current_value = KTD2692_MOVIE_CURRENT(buffer, pdata->max_current);
|
|
}
|
|
|
|
/* get torch current value */
|
|
if (of_property_read_u32(dnode, "torch_current", &buffer) == 0) {
|
|
dev_info(dev, "torch_current = <%d><%d>\n",
|
|
buffer, KTD2692_MOVIE_CURRENT(buffer, pdata->max_current));
|
|
pdata->torch_current_value = KTD2692_MOVIE_CURRENT(buffer, pdata->max_current);
|
|
}
|
|
|
|
ret = of_property_read_u32(dnode, "torch_table_enable", &torch_table_enable);
|
|
if (ret) {
|
|
pr_info("%s failed to get a torch_table_enable\n", __func__);
|
|
}
|
|
if (torch_table_enable == 1) {
|
|
pdata->torch_table_enable = torch_table_enable;
|
|
ret = of_property_read_u32_array(dnode, "torch_table", pdata->torch_table, TORCH_STEP);
|
|
} else {
|
|
pdata->torch_table_enable = 0;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ktd2692_probe(struct platform_device *pdev)
|
|
{
|
|
struct ktd2692_platform_data *pdata;
|
|
int ret = 0;
|
|
|
|
if (pdev->dev.of_node) {
|
|
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev, "Failed to allocate memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
ret = ktd2692_parse_dt(&pdev->dev, pdata);
|
|
if (ret < 0) {
|
|
return -EFAULT;
|
|
}
|
|
} else {
|
|
pdata = pdev->dev.platform_data;
|
|
if (pdata == NULL) {
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
global_ktd2692data = pdata;
|
|
global_dev = &pdev->dev;
|
|
|
|
LED_INFO("KTD2692_LED Probe\n");
|
|
|
|
global_ktd2692data->is_torch_enable = false;
|
|
|
|
ktd2692_dev = device_create(camera_class, NULL, 0, NULL, "flash");
|
|
if (IS_ERR(ktd2692_dev)) {
|
|
LED_ERROR("Failed to create device(flash)!\n");
|
|
}
|
|
|
|
if (device_create_file(ktd2692_dev, &dev_attr_rear_flash) < 0) {
|
|
LED_ERROR("failed to create device file, %s\n",
|
|
dev_attr_rear_flash.attr.name);
|
|
}
|
|
if (device_create_file(ktd2692_dev, &dev_attr_rear_torch_flash) < 0) {
|
|
LED_ERROR("failed to create device file, %s\n",
|
|
dev_attr_rear_torch_flash.attr.name);
|
|
}
|
|
|
|
spin_lock_init(&pdata->int_lock);
|
|
|
|
return 0;
|
|
}
|
|
static int ktd2692_remove(struct platform_device *pdev)
|
|
{
|
|
|
|
device_remove_file(ktd2692_dev, &dev_attr_rear_flash);
|
|
device_remove_file(ktd2692_dev, &dev_attr_rear_torch_flash);
|
|
device_destroy(camera_class, 0);
|
|
class_destroy(camera_class);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static struct of_device_id ktd2692_dt_ids[] = {
|
|
{ .compatible = "ktd2692",},
|
|
{},
|
|
};
|
|
/*MODULE_DEVICE_TABLE(of, ktd2692_dt_ids);*/
|
|
#endif
|
|
|
|
static struct platform_driver ktd2692_driver = {
|
|
.driver = {
|
|
.name = ktd2692_NAME,
|
|
.owner = THIS_MODULE,
|
|
#ifdef CONFIG_OF
|
|
.of_match_table = ktd2692_dt_ids,
|
|
#endif
|
|
},
|
|
.probe = ktd2692_probe,
|
|
.remove = ktd2692_remove,
|
|
};
|
|
|
|
static int __init ktd2692_init(void)
|
|
{
|
|
return platform_driver_register(&ktd2692_driver);
|
|
}
|
|
|
|
static void __exit ktd2692_exit(void)
|
|
{
|
|
platform_driver_unregister(&ktd2692_driver);
|
|
}
|
|
|
|
module_init(ktd2692_init);
|
|
module_exit(ktd2692_exit);
|
|
|
|
MODULE_AUTHOR("sunggeun yim <sunggeun.yim@samsung.com.com>");
|
|
MODULE_DESCRIPTION("KTD2692 driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|