leds: ktd2692: Move driver to flash subdirectory

We created a subdirectory for LED drivers that depend on
CONFIG_LEDS_CLASS_FLASH, and this driver does so let's
move it there.

Cc: Ingi Kim <ingi2.kim@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

1 files changed, 0 insertions, 424 deletions

diff --git a/drivers/leds/leds-ktd2692.c b/drivers/leds/leds-ktd2692.c
deleted file mode 100644
index f341da1503a4..000000000000
--- a/drivers/leds/leds-ktd2692.c
+++ /dev/null
@@ -1,424 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * LED driver : leds-ktd2692.c
- *
- * Copyright (C) 2015 Samsung Electronics
- * Ingi Kim <ingi2.kim@samsung.com>
- */
-
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/gpio/consumer.h>
-#include <linux/led-class-flash.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/regulator/consumer.h>
-
-/* Value related the movie mode */
-#define KTD2692_MOVIE_MODE_CURRENT_LEVELS	16
-#define KTD2692_MM_TO_FL_RATIO(x)		((x) / 3)
-#define KTD2692_MM_MIN_CURR_THRESHOLD_SCALE	8
-
-/* Value related the flash mode */
-#define KTD2692_FLASH_MODE_TIMEOUT_LEVELS	8
-#define KTD2692_FLASH_MODE_TIMEOUT_DISABLE	0
-#define KTD2692_FLASH_MODE_CURR_PERCENT(x)	(((x) * 16) / 100)
-
-/* Macro for getting offset of flash timeout */
-#define GET_TIMEOUT_OFFSET(timeout, step)	((timeout) / (step))
-
-/* Base register address */
-#define KTD2692_REG_LVP_BASE			0x00
-#define KTD2692_REG_FLASH_TIMEOUT_BASE		0x20
-#define KTD2692_REG_MM_MIN_CURR_THRESHOLD_BASE	0x40
-#define KTD2692_REG_MOVIE_CURRENT_BASE		0x60
-#define KTD2692_REG_FLASH_CURRENT_BASE		0x80
-#define KTD2692_REG_MODE_BASE			0xA0
-
-/* Set bit coding time for expresswire interface */
-#define KTD2692_TIME_RESET_US			700
-#define KTD2692_TIME_DATA_START_TIME_US		10
-#define KTD2692_TIME_HIGH_END_OF_DATA_US	350
-#define KTD2692_TIME_LOW_END_OF_DATA_US		10
-#define KTD2692_TIME_SHORT_BITSET_US		4
-#define KTD2692_TIME_LONG_BITSET_US		12
-
-/* KTD2692 default length of name */
-#define KTD2692_NAME_LENGTH			20
-
-enum ktd2692_bitset {
-	KTD2692_LOW = 0,
-	KTD2692_HIGH,
-};
-
-/* Movie / Flash Mode Control */
-enum ktd2692_led_mode {
-	KTD2692_MODE_DISABLE = 0,	/* default */
-	KTD2692_MODE_MOVIE,
-	KTD2692_MODE_FLASH,
-};
-
-struct ktd2692_led_config_data {
-	/* maximum LED current in movie mode */
-	u32 movie_max_microamp;
-	/* maximum LED current in flash mode */
-	u32 flash_max_microamp;
-	/* maximum flash timeout */
-	u32 flash_max_timeout;
-	/* max LED brightness level */
-	enum led_brightness max_brightness;
-};
-
-struct ktd2692_context {
-	/* Related LED Flash class device */
-	struct led_classdev_flash fled_cdev;
-
-	/* secures access to the device */
-	struct mutex lock;
-	struct regulator *regulator;
-
-	struct gpio_desc *aux_gpio;
-	struct gpio_desc *ctrl_gpio;
-
-	enum ktd2692_led_mode mode;
-	enum led_brightness torch_brightness;
-};
-
-static struct ktd2692_context *fled_cdev_to_led(
-				struct led_classdev_flash *fled_cdev)
-{
-	return container_of(fled_cdev, struct ktd2692_context, fled_cdev);
-}
-
-static void ktd2692_expresswire_start(struct ktd2692_context *led)
-{
-	gpiod_direction_output(led->ctrl_gpio, KTD2692_HIGH);
-	udelay(KTD2692_TIME_DATA_START_TIME_US);
-}
-
-static void ktd2692_expresswire_reset(struct ktd2692_context *led)
-{
-	gpiod_direction_output(led->ctrl_gpio, KTD2692_LOW);
-	udelay(KTD2692_TIME_RESET_US);
-}
-
-static void ktd2692_expresswire_end(struct ktd2692_context *led)
-{
-	gpiod_direction_output(led->ctrl_gpio, KTD2692_LOW);
-	udelay(KTD2692_TIME_LOW_END_OF_DATA_US);
-	gpiod_direction_output(led->ctrl_gpio, KTD2692_HIGH);
-	udelay(KTD2692_TIME_HIGH_END_OF_DATA_US);
-}
-
-static void ktd2692_expresswire_set_bit(struct ktd2692_context *led, bool bit)
-{
-	/*
-	 * The Low Bit(0) and High Bit(1) is based on a time detection
-	 * algorithm between time low and time high
-	 * Time_(L_LB) : Low time of the Low Bit(0)
-	 * Time_(H_LB) : High time of the LOW Bit(0)
-	 * Time_(L_HB) : Low time of the High Bit(1)
-	 * Time_(H_HB) : High time of the High Bit(1)
-	 *
-	 * It can be simplified to:
-	 * Low Bit(0) : 2 * Time_(H_LB) < Time_(L_LB)
-	 * High Bit(1) : 2 * Time_(L_HB) < Time_(H_HB)
-	 * HIGH  ___           ____    _..     _________    ___
-	 *          |_________|    |_..  |____|         |__|
-	 * LOW        <L_LB>  <H_LB>     <L_HB>  <H_HB>
-	 *          [  Low Bit (0) ]     [  High Bit(1) ]
-	 */
-	if (bit) {
-		gpiod_direction_output(led->ctrl_gpio, KTD2692_LOW);
-		udelay(KTD2692_TIME_SHORT_BITSET_US);
-		gpiod_direction_output(led->ctrl_gpio, KTD2692_HIGH);
-		udelay(KTD2692_TIME_LONG_BITSET_US);
-	} else {
-		gpiod_direction_output(led->ctrl_gpio, KTD2692_LOW);
-		udelay(KTD2692_TIME_LONG_BITSET_US);
-		gpiod_direction_output(led->ctrl_gpio, KTD2692_HIGH);
-		udelay(KTD2692_TIME_SHORT_BITSET_US);
-	}
-}
-
-static void ktd2692_expresswire_write(struct ktd2692_context *led, u8 value)
-{
-	int i;
-
-	ktd2692_expresswire_start(led);
-	for (i = 7; i >= 0; i--)
-		ktd2692_expresswire_set_bit(led, value & BIT(i));
-	ktd2692_expresswire_end(led);
-}
-
-static int ktd2692_led_brightness_set(struct led_classdev *led_cdev,
-				       enum led_brightness brightness)
-{
-	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
-	struct ktd2692_context *led = fled_cdev_to_led(fled_cdev);
-
-	mutex_lock(&led->lock);
-
-	if (brightness == LED_OFF) {
-		led->mode = KTD2692_MODE_DISABLE;
-		gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
-	} else {
-		ktd2692_expresswire_write(led, brightness |
-					KTD2692_REG_MOVIE_CURRENT_BASE);
-		led->mode = KTD2692_MODE_MOVIE;
-	}
-
-	ktd2692_expresswire_write(led, led->mode | KTD2692_REG_MODE_BASE);
-	mutex_unlock(&led->lock);
-
-	return 0;
-}
-
-static int ktd2692_led_flash_strobe_set(struct led_classdev_flash *fled_cdev,
-					bool state)
-{
-	struct ktd2692_context *led = fled_cdev_to_led(fled_cdev);
-	struct led_flash_setting *timeout = &fled_cdev->timeout;
-	u32 flash_tm_reg;
-
-	mutex_lock(&led->lock);
-
-	if (state) {
-		flash_tm_reg = GET_TIMEOUT_OFFSET(timeout->val, timeout->step);
-		ktd2692_expresswire_write(led, flash_tm_reg
-				| KTD2692_REG_FLASH_TIMEOUT_BASE);
-
-		led->mode = KTD2692_MODE_FLASH;
-		gpiod_direction_output(led->aux_gpio, KTD2692_HIGH);
-	} else {
-		led->mode = KTD2692_MODE_DISABLE;
-		gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
-	}
-
-	ktd2692_expresswire_write(led, led->mode | KTD2692_REG_MODE_BASE);
-
-	fled_cdev->led_cdev.brightness = LED_OFF;
-	led->mode = KTD2692_MODE_DISABLE;
-
-	mutex_unlock(&led->lock);
-
-	return 0;
-}
-
-static int ktd2692_led_flash_timeout_set(struct led_classdev_flash *fled_cdev,
-					 u32 timeout)
-{
-	return 0;
-}
-
-static void ktd2692_init_movie_current_max(struct ktd2692_led_config_data *cfg)
-{
-	u32 offset, step;
-	u32 movie_current_microamp;
-
-	offset = KTD2692_MOVIE_MODE_CURRENT_LEVELS;
-	step = KTD2692_MM_TO_FL_RATIO(cfg->flash_max_microamp)
-		/ KTD2692_MOVIE_MODE_CURRENT_LEVELS;
-
-	do {
-		movie_current_microamp = step * offset;
-		offset--;
-	} while ((movie_current_microamp > cfg->movie_max_microamp) &&
-		(offset > 0));
-
-	cfg->max_brightness = offset;
-}
-
-static void ktd2692_init_flash_timeout(struct led_classdev_flash *fled_cdev,
-				       struct ktd2692_led_config_data *cfg)
-{
-	struct led_flash_setting *setting;
-
-	setting = &fled_cdev->timeout;
-	setting->min = KTD2692_FLASH_MODE_TIMEOUT_DISABLE;
-	setting->max = cfg->flash_max_timeout;
-	setting->step = cfg->flash_max_timeout
-			/ (KTD2692_FLASH_MODE_TIMEOUT_LEVELS - 1);
-	setting->val = cfg->flash_max_timeout;
-}
-
-static void ktd2692_setup(struct ktd2692_context *led)
-{
-	led->mode = KTD2692_MODE_DISABLE;
-	ktd2692_expresswire_reset(led);
-	gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
-
-	ktd2692_expresswire_write(led, (KTD2692_MM_MIN_CURR_THRESHOLD_SCALE - 1)
-				 | KTD2692_REG_MM_MIN_CURR_THRESHOLD_BASE);
-	ktd2692_expresswire_write(led, KTD2692_FLASH_MODE_CURR_PERCENT(45)
-				 | KTD2692_REG_FLASH_CURRENT_BASE);
-}
-
-static void regulator_disable_action(void *_data)
-{
-	struct device *dev = _data;
-	struct ktd2692_context *led = dev_get_drvdata(dev);
-	int ret;
-
-	ret = regulator_disable(led->regulator);
-	if (ret)
-		dev_err(dev, "Failed to disable supply: %d\n", ret);
-}
-
-static int ktd2692_parse_dt(struct ktd2692_context *led, struct device *dev,
-			    struct ktd2692_led_config_data *cfg)
-{
-	struct device_node *np = dev_of_node(dev);
-	struct device_node *child_node;
-	int ret;
-
-	if (!dev_of_node(dev))
-		return -ENXIO;
-
-	led->ctrl_gpio = devm_gpiod_get(dev, "ctrl", GPIOD_ASIS);
-	ret = PTR_ERR_OR_ZERO(led->ctrl_gpio);
-	if (ret) {
-		dev_err(dev, "cannot get ctrl-gpios %d\n", ret);
-		return ret;
-	}
-
-	led->aux_gpio = devm_gpiod_get(dev, "aux", GPIOD_ASIS);
-	ret = PTR_ERR_OR_ZERO(led->aux_gpio);
-	if (ret) {
-		dev_err(dev, "cannot get aux-gpios %d\n", ret);
-		return ret;
-	}
-
-	led->regulator = devm_regulator_get(dev, "vin");
-	if (IS_ERR(led->regulator))
-		led->regulator = NULL;
-
-	if (led->regulator) {
-		ret = regulator_enable(led->regulator);
-		if (ret) {
-			dev_err(dev, "Failed to enable supply: %d\n", ret);
-		} else {
-			ret = devm_add_action_or_reset(dev,
-						regulator_disable_action, dev);
-			if (ret)
-				return ret;
-		}
-	}
-
-	child_node = of_get_next_available_child(np, NULL);
-	if (!child_node) {
-		dev_err(dev, "No DT child node found for connected LED.\n");
-		return -EINVAL;
-	}
-
-	led->fled_cdev.led_cdev.name =
-		of_get_property(child_node, "label", NULL) ? : child_node->name;
-
-	ret = of_property_read_u32(child_node, "led-max-microamp",
-				   &cfg->movie_max_microamp);
-	if (ret) {
-		dev_err(dev, "failed to parse led-max-microamp\n");
-		goto err_parse_dt;
-	}
-
-	ret = of_property_read_u32(child_node, "flash-max-microamp",
-				   &cfg->flash_max_microamp);
-	if (ret) {
-		dev_err(dev, "failed to parse flash-max-microamp\n");
-		goto err_parse_dt;
-	}
-
-	ret = of_property_read_u32(child_node, "flash-max-timeout-us",
-				   &cfg->flash_max_timeout);
-	if (ret) {
-		dev_err(dev, "failed to parse flash-max-timeout-us\n");
-		goto err_parse_dt;
-	}
-
-err_parse_dt:
-	of_node_put(child_node);
-	return ret;
-}
-
-static const struct led_flash_ops flash_ops = {
-	.strobe_set = ktd2692_led_flash_strobe_set,
-	.timeout_set = ktd2692_led_flash_timeout_set,
-};
-
-static int ktd2692_probe(struct platform_device *pdev)
-{
-	struct ktd2692_context *led;
-	struct led_classdev *led_cdev;
-	struct led_classdev_flash *fled_cdev;
-	struct ktd2692_led_config_data led_cfg;
-	int ret;
-
-	led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
-	if (!led)
-		return -ENOMEM;
-
-	fled_cdev = &led->fled_cdev;
-	led_cdev = &fled_cdev->led_cdev;
-
-	ret = ktd2692_parse_dt(led, &pdev->dev, &led_cfg);
-	if (ret)
-		return ret;
-
-	ktd2692_init_flash_timeout(fled_cdev, &led_cfg);
-	ktd2692_init_movie_current_max(&led_cfg);
-
-	fled_cdev->ops = &flash_ops;
-
-	led_cdev->max_brightness = led_cfg.max_brightness;
-	led_cdev->brightness_set_blocking = ktd2692_led_brightness_set;
-	led_cdev->flags |= LED_CORE_SUSPENDRESUME | LED_DEV_CAP_FLASH;
-
-	mutex_init(&led->lock);
-
-	platform_set_drvdata(pdev, led);
-
-	ret = led_classdev_flash_register(&pdev->dev, fled_cdev);
-	if (ret) {
-		dev_err(&pdev->dev, "can't register LED %s\n", led_cdev->name);
-		mutex_destroy(&led->lock);
-		return ret;
-	}
-
-	ktd2692_setup(led);
-
-	return 0;
-}
-
-static int ktd2692_remove(struct platform_device *pdev)
-{
-	struct ktd2692_context *led = platform_get_drvdata(pdev);
-
-	led_classdev_flash_unregister(&led->fled_cdev);
-
-	mutex_destroy(&led->lock);
-
-	return 0;
-}
-
-static const struct of_device_id ktd2692_match[] = {
-	{ .compatible = "kinetic,ktd2692", },
-	{ /* sentinel */ },
-};
-MODULE_DEVICE_TABLE(of, ktd2692_match);
-
-static struct platform_driver ktd2692_driver = {
-	.driver = {
-		.name  = "ktd2692",
-		.of_match_table = ktd2692_match,
-	},
-	.probe  = ktd2692_probe,
-	.remove = ktd2692_remove,
-};
-
-module_platform_driver(ktd2692_driver);
-
-MODULE_AUTHOR("Ingi Kim <ingi2.kim@samsung.com>");
-MODULE_DESCRIPTION("Kinetic KTD2692 LED driver");
-MODULE_LICENSE("GPL v2");