[deliverable/linux.git] / drivers / leds / leds-pca9532.c

/*
 * pca9532.c - 16-bit Led dimmer
 *
 * Copyright (C) 2008 Riku Voipio
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * Datasheet: http://www.nxp.com/acrobat/datasheets/PCA9532_3.pdf
 *
 */

#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/leds.h>
#include <linux/input.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <linux/leds-pca9532.h>
#include <linux/gpio.h>

#define PCA9532_REG_INPUT(i) ((i)/8)
#define PCA9532_REG_PSC(i) (0x2+(i)*2)
#define PCA9532_REG_PWM(i) (0x3+(i)*2)
#define PCA9532_REG_LS0  0x6
#define LED_REG(led) ((led>>2)+PCA9532_REG_LS0)
#define LED_NUM(led) (led & 0x3)

#define ldev_to_led(c)       container_of(c, struct pca9532_led, ldev)

struct pca9532_data {
	struct i2c_client *client;
	struct pca9532_led leds[16];
	struct mutex update_lock;
	struct input_dev *idev;
	struct work_struct work;
#ifdef CONFIG_LEDS_PCA9532_GPIO
	struct gpio_chip gpio;
#endif
	u8 pwm[2];
	u8 psc[2];
};

static int pca9532_probe(struct i2c_client *client,
	const struct i2c_device_id *id);
static int pca9532_remove(struct i2c_client *client);

static const struct i2c_device_id pca9532_id[] = {
	{ "pca9532", 0 },
	{ }
};

MODULE_DEVICE_TABLE(i2c, pca9532_id);

static struct i2c_driver pca9532_driver = {
	.driver = {
		.name = "pca9532",
	},
	.probe = pca9532_probe,
	.remove = pca9532_remove,
	.id_table = pca9532_id,
};

/* We have two pwm/blinkers, but 16 possible leds to drive. Additionally,
 * the clever Thecus people are using one pwm to drive the beeper. So,
 * as a compromise we average one pwm to the values requested by all
 * leds that are not ON/OFF.
 * */
static int pca9532_calcpwm(struct i2c_client *client, int pwm, int blink,
	enum led_brightness value)
{
	int a = 0, b = 0, i = 0;
	struct pca9532_data *data = i2c_get_clientdata(client);
	for (i = 0; i < 16; i++) {
		if (data->leds[i].type == PCA9532_TYPE_LED &&
			data->leds[i].state == PCA9532_PWM0+pwm) {
				a++;
				b += data->leds[i].ldev.brightness;
		}
	}
	if (a == 0) {
		dev_err(&client->dev,
		"fear of division by zero %d/%d, wanted %d\n",
			b, a, value);
		return -EINVAL;
	}
	b = b/a;
	if (b > 0xFF)
		return -EINVAL;
	data->pwm[pwm] = b;
	data->psc[pwm] = blink;
	return 0;
}

static int pca9532_setpwm(struct i2c_client *client, int pwm)
{
	struct pca9532_data *data = i2c_get_clientdata(client);
	mutex_lock(&data->update_lock);
	i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(pwm),
		data->pwm[pwm]);
	i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(pwm),
		data->psc[pwm]);
	mutex_unlock(&data->update_lock);
	return 0;
}

/* Set LED routing */
static void pca9532_setled(struct pca9532_led *led)
{
	struct i2c_client *client = led->client;
	struct pca9532_data *data = i2c_get_clientdata(client);
	char reg;

	mutex_lock(&data->update_lock);
	reg = i2c_smbus_read_byte_data(client, LED_REG(led->id));
	/* zero led bits */
	reg = reg & ~(0x3<<LED_NUM(led->id)*2);
	/* set the new value */
	reg = reg | (led->state << LED_NUM(led->id)*2);
	i2c_smbus_write_byte_data(client, LED_REG(led->id), reg);
	mutex_unlock(&data->update_lock);
}

static void pca9532_set_brightness(struct led_classdev *led_cdev,
	enum led_brightness value)
{
	int err = 0;
	struct pca9532_led *led = ldev_to_led(led_cdev);

	if (value == LED_OFF)
		led->state = PCA9532_OFF;
	else if (value == LED_FULL)
		led->state = PCA9532_ON;
	else {
		led->state = PCA9532_PWM0; /* Thecus: hardcode one pwm */
		err = pca9532_calcpwm(led->client, 0, 0, value);
		if (err)
			return; /* XXX: led api doesn't allow error code? */
	}
	schedule_work(&led->work);
}

static int pca9532_set_blink(struct led_classdev *led_cdev,
	unsigned long *delay_on, unsigned long *delay_off)
{
	struct pca9532_led *led = ldev_to_led(led_cdev);
	struct i2c_client *client = led->client;
	int psc;
	int err = 0;

	if (*delay_on == 0 && *delay_off == 0) {
	/* led subsystem ask us for a blink rate */
		*delay_on = 1000;
		*delay_off = 1000;
	}
	if (*delay_on != *delay_off || *delay_on > 1690 || *delay_on < 6)
		return -EINVAL;

	/* Thecus specific: only use PSC/PWM 0 */
	psc = (*delay_on * 152-1)/1000;
	err = pca9532_calcpwm(client, 0, psc, led_cdev->brightness);
	if (err)
		return err;
	schedule_work(&led->work);
	return 0;
}

static int pca9532_event(struct input_dev *dev, unsigned int type,
	unsigned int code, int value)
{
	struct pca9532_data *data = input_get_drvdata(dev);

	if (!(type == EV_SND && (code == SND_BELL || code == SND_TONE)))
		return -1;

	/* XXX: allow different kind of beeps with psc/pwm modifications */
	if (value > 1 && value < 32767)
		data->pwm[1] = 127;
	else
		data->pwm[1] = 0;

	schedule_work(&data->work);

	return 0;
}

static void pca9532_input_work(struct work_struct *work)
{
	struct pca9532_data *data;
	data = container_of(work, struct pca9532_data, work);
	mutex_lock(&data->update_lock);
	i2c_smbus_write_byte_data(data->client, PCA9532_REG_PWM(1),
		data->pwm[1]);
	mutex_unlock(&data->update_lock);
}

static void pca9532_led_work(struct work_struct *work)
{
	struct pca9532_led *led;
	led = container_of(work, struct pca9532_led, work);
	if (led->state == PCA9532_PWM0)
		pca9532_setpwm(led->client, 0);
	pca9532_setled(led);
}

#ifdef CONFIG_LEDS_PCA9532_GPIO
static int pca9532_gpio_request_pin(struct gpio_chip *gc, unsigned offset)
{
	struct pca9532_data *data = container_of(gc, struct pca9532_data, gpio);
	struct pca9532_led *led = &data->leds[offset];

	if (led->type == PCA9532_TYPE_GPIO)
		return 0;

	return -EBUSY;
}

static void pca9532_gpio_set_value(struct gpio_chip *gc, unsigned offset, int val)
{
	struct pca9532_data *data = container_of(gc, struct pca9532_data, gpio);
	struct pca9532_led *led = &data->leds[offset];

	if (val)
		led->state = PCA9532_ON;
	else
		led->state = PCA9532_OFF;

	pca9532_setled(led);
}

static int pca9532_gpio_get_value(struct gpio_chip *gc, unsigned offset)
{
	struct pca9532_data *data = container_of(gc, struct pca9532_data, gpio);
	unsigned char reg;

	reg = i2c_smbus_read_byte_data(data->client, PCA9532_REG_INPUT(offset));

	return !!(reg & (1 << (offset % 8)));
}

static int pca9532_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
{
	/* To use as input ensure pin is not driven */
	pca9532_gpio_set_value(gc, offset, 0);

	return 0;
}

static int pca9532_gpio_direction_output(struct gpio_chip *gc, unsigned offset, int val)
{
	pca9532_gpio_set_value(gc, offset, val);

	return 0;
}
#endif /* CONFIG_LEDS_PCA9532_GPIO */

static int pca9532_destroy_devices(struct pca9532_data *data, int n_devs)
{
	int i = n_devs;

	if (!data)
		return -EINVAL;

	while (--i >= 0) {
		switch (data->leds[i].type) {
		case PCA9532_TYPE_NONE:
		case PCA9532_TYPE_GPIO:
			break;
		case PCA9532_TYPE_LED:
			led_classdev_unregister(&data->leds[i].ldev);
			cancel_work_sync(&data->leds[i].work);
			break;
		case PCA9532_TYPE_N2100_BEEP:
			if (data->idev != NULL) {
				input_unregister_device(data->idev);
				cancel_work_sync(&data->work);
				data->idev = NULL;
			}
			break;
		}
	}

#ifdef CONFIG_LEDS_PCA9532_GPIO
	if (data->gpio.dev) {
		int err = gpiochip_remove(&data->gpio);
		if (err) {
			dev_err(&data->client->dev, "%s failed, %d\n",
						"gpiochip_remove()", err);
			return err;
		}
	}
#endif

	return 0;
}

static int pca9532_configure(struct i2c_client *client,
	struct pca9532_data *data, struct pca9532_platform_data *pdata)
{
	int i, err = 0;
	int gpios = 0;

	for (i = 0; i < 2; i++)	{
		data->pwm[i] = pdata->pwm[i];
		data->psc[i] = pdata->psc[i];
		i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(i),
			data->pwm[i]);
		i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(i),
			data->psc[i]);
	}

	for (i = 0; i < 16; i++) {
		struct pca9532_led *led = &data->leds[i];
		struct pca9532_led *pled = &pdata->leds[i];
		led->client = client;
		led->id = i;
		led->type = pled->type;
		switch (led->type) {
		case PCA9532_TYPE_NONE:
			break;
		case PCA9532_TYPE_GPIO:
			gpios++;
			break;
		case PCA9532_TYPE_LED:
			led->state = pled->state;
			led->name = pled->name;
			led->ldev.name = led->name;
			led->ldev.brightness = LED_OFF;
			led->ldev.brightness_set = pca9532_set_brightness;
			led->ldev.blink_set = pca9532_set_blink;
			INIT_WORK(&led->work, pca9532_led_work);
			err = led_classdev_register(&client->dev, &led->ldev);
			if (err < 0) {
				dev_err(&client->dev,
					"couldn't register LED %s\n",
					led->name);
				goto exit;
			}
			pca9532_setled(led);
			break;
		case PCA9532_TYPE_N2100_BEEP:
			BUG_ON(data->idev);
			led->state = PCA9532_PWM1;
			pca9532_setled(led);
			data->idev = input_allocate_device();
			if (data->idev == NULL) {
				err = -ENOMEM;
				goto exit;
			}
			data->idev->name = pled->name;
			data->idev->phys = "i2c/pca9532";
			data->idev->id.bustype = BUS_HOST;
			data->idev->id.vendor = 0x001f;
			data->idev->id.product = 0x0001;
			data->idev->id.version = 0x0100;
			data->idev->evbit[0] = BIT_MASK(EV_SND);
			data->idev->sndbit[0] = BIT_MASK(SND_BELL) |
						BIT_MASK(SND_TONE);
			data->idev->event = pca9532_event;
			input_set_drvdata(data->idev, data);
			INIT_WORK(&data->work, pca9532_input_work);
			err = input_register_device(data->idev);
			if (err) {
				input_free_device(data->idev);
				cancel_work_sync(&data->work);
				data->idev = NULL;
				goto exit;
			}
			break;
		}
	}

#ifdef CONFIG_LEDS_PCA9532_GPIO
	if (gpios) {
		data->gpio.label = "gpio-pca9532";
		data->gpio.direction_input = pca9532_gpio_direction_input;
		data->gpio.direction_output = pca9532_gpio_direction_output;
		data->gpio.set = pca9532_gpio_set_value;
		data->gpio.get = pca9532_gpio_get_value;
		data->gpio.request = pca9532_gpio_request_pin;
		data->gpio.can_sleep = 1;
		data->gpio.base = pdata->gpio_base;
		data->gpio.ngpio = 16;
		data->gpio.dev = &client->dev;
		data->gpio.owner = THIS_MODULE;

		err = gpiochip_add(&data->gpio);
		if (err) {
			/* Use data->gpio.dev as a flag for freeing gpiochip */
			data->gpio.dev = NULL;
			dev_warn(&client->dev, "could not add gpiochip\n");
		} else {
			dev_info(&client->dev, "gpios %i...%i\n",
				data->gpio.base, data->gpio.base +
				data->gpio.ngpio - 1);
		}
	}
#endif

	return 0;

exit:
	pca9532_destroy_devices(data, i);
	return err;
}

static int pca9532_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
{
	struct pca9532_data *data = i2c_get_clientdata(client);
	struct pca9532_platform_data *pca9532_pdata = client->dev.platform_data;
	int err;

	if (!pca9532_pdata)
		return -EIO;

	if (!i2c_check_functionality(client->adapter,
		I2C_FUNC_SMBUS_BYTE_DATA))
		return -EIO;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	dev_info(&client->dev, "setting platform data\n");
	i2c_set_clientdata(client, data);
	data->client = client;
	mutex_init(&data->update_lock);

	err = pca9532_configure(client, data, pca9532_pdata);
	if (err)
		kfree(data);

	return err;
}

static int pca9532_remove(struct i2c_client *client)
{
	struct pca9532_data *data = i2c_get_clientdata(client);
	int err;

	err = pca9532_destroy_devices(data, 16);
	if (err)
		return err;

	kfree(data);
	return 0;
}

static int __init pca9532_init(void)
{
	return i2c_add_driver(&pca9532_driver);
}

static void __exit pca9532_exit(void)
{
	i2c_del_driver(&pca9532_driver);
}

MODULE_AUTHOR("Riku Voipio");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("PCA 9532 LED dimmer");

module_init(pca9532_init);
module_exit(pca9532_exit);
Commit	Line	Data
e14fa824 RV	1	/*
	2	* pca9532.c - 16-bit Led dimmer
	3	*
b26e0ed4	4	* Copyright (C) 2008 Riku Voipio
e14fa824 RV	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; version 2 of the License.
	9	*
	10	* Datasheet: http://www.nxp.com/acrobat/datasheets/PCA9532_3.pdf
	11	*
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/i2c.h>
5a0e3ad6	16	#include <linux/slab.h>
e14fa824 RV	17	#include <linux/leds.h>
	18	#include <linux/input.h>
	19	#include <linux/mutex.h>
934cd3f9	20	#include <linux/workqueue.h>
e14fa824	21	#include <linux/leds-pca9532.h>
3c1ab50d	22	#include <linux/gpio.h>
e14fa824	23
3c1ab50d	24	#define PCA9532_REG_INPUT(i) ((i)/8)
e14fa824 RV	25	#define PCA9532_REG_PSC(i) (0x2+(i)*2)
	26	#define PCA9532_REG_PWM(i) (0x3+(i)*2)
	27	#define PCA9532_REG_LS0 0x6
	28	#define LED_REG(led) ((led>>2)+PCA9532_REG_LS0)
	29	#define LED_NUM(led) (led & 0x3)
	30
	31	#define ldev_to_led(c) container_of(c, struct pca9532_led, ldev)
	32
	33	struct pca9532_data {
	34	struct i2c_client *client;
	35	struct pca9532_led leds[16];
	36	struct mutex update_lock;
85c5204a	37	struct input_dev *idev;
07172d2b	38	struct work_struct work;
3c1ab50d JE	39	#ifdef CONFIG_LEDS_PCA9532_GPIO
	40	struct gpio_chip gpio;
	41	#endif
e14fa824 RV	42	u8 pwm[2];
	43	u8 psc[2];
	44	};
	45
	46	static int pca9532_probe(struct i2c_client *client,
	47	const struct i2c_device_id *id);
	48	static int pca9532_remove(struct i2c_client *client);
	49
	50	static const struct i2c_device_id pca9532_id[] = {
	51	{ "pca9532", 0 },
	52	{ }
	53	};
	54
	55	MODULE_DEVICE_TABLE(i2c, pca9532_id);
	56
	57	static struct i2c_driver pca9532_driver = {
	58	.driver = {
85c5204a	59	.name = "pca9532",
e14fa824	60	},
85c5204a	61	.probe = pca9532_probe,
e14fa824 RV	62	.remove = pca9532_remove,
	63	.id_table = pca9532_id,
	64	};
	65
25985edc	66	/* We have two pwm/blinkers, but 16 possible leds to drive. Additionally,
e14fa824 RV	67	* the clever Thecus people are using one pwm to drive the beeper. So,
	68	* as a compromise we average one pwm to the values requested by all
	69	* leds that are not ON/OFF.
	70	* */
934cd3f9	71	static int pca9532_calcpwm(struct i2c_client *client, int pwm, int blink,
e14fa824 RV	72	enum led_brightness value)
	73	{
	74	int a = 0, b = 0, i = 0;
	75	struct pca9532_data *data = i2c_get_clientdata(client);
	76	for (i = 0; i < 16; i++) {
	77	if (data->leds[i].type == PCA9532_TYPE_LED &&
	78	data->leds[i].state == PCA9532_PWM0+pwm) {
	79	a++;
	80	b += data->leds[i].ldev.brightness;
	81	}
	82	}
	83	if (a == 0) {
	84	dev_err(&client->dev,
	85	"fear of division by zero %d/%d, wanted %d\n",
	86	b, a, value);
	87	return -EINVAL;
	88	}
	89	b = b/a;
	90	if (b > 0xFF)
	91	return -EINVAL;
e14fa824	92	data->pwm[pwm] = b;
07172d2b AO	93	data->psc[pwm] = blink;
07172d2b AO	94	return 0;
934cd3f9 RV	95	}
	96
	97	static int pca9532_setpwm(struct i2c_client *client, int pwm)
	98	{
07172d2b AO	99	struct pca9532_data *data = i2c_get_clientdata(client);
07172d2b AO	100	mutex_lock(&data->update_lock);
e14fa824 RV	101	i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(pwm),
e14fa824 RV	102	data->pwm[pwm]);
e14fa824 RV	103	i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(pwm),
	104	data->psc[pwm]);
	105	mutex_unlock(&data->update_lock);
	106	return 0;
	107	}
	108
	109	/* Set LED routing */
	110	static void pca9532_setled(struct pca9532_led *led)
	111	{
	112	struct i2c_client *client = led->client;
	113	struct pca9532_data *data = i2c_get_clientdata(client);
	114	char reg;
	115
	116	mutex_lock(&data->update_lock);
	117	reg = i2c_smbus_read_byte_data(client, LED_REG(led->id));
	118	/* zero led bits */
	119	reg = reg & ~(0x3<<LED_NUM(led->id)*2);
	120	/* set the new value */
	121	reg = reg \| (led->state << LED_NUM(led->id)*2);
	122	i2c_smbus_write_byte_data(client, LED_REG(led->id), reg);
	123	mutex_unlock(&data->update_lock);
	124	}
	125
	126	static void pca9532_set_brightness(struct led_classdev *led_cdev,
	127	enum led_brightness value)
	128	{
	129	int err = 0;
	130	struct pca9532_led *led = ldev_to_led(led_cdev);
	131
	132	if (value == LED_OFF)
	133	led->state = PCA9532_OFF;
	134	else if (value == LED_FULL)
	135	led->state = PCA9532_ON;
	136	else {
	137	led->state = PCA9532_PWM0; /* Thecus: hardcode one pwm */
07172d2b	138	err = pca9532_calcpwm(led->client, 0, 0, value);
e14fa824 RV	139	if (err)
	140	return; /* XXX: led api doesn't allow error code? */
	141	}
07172d2b	142	schedule_work(&led->work);
e14fa824 RV	143	}
	144
	145	static int pca9532_set_blink(struct led_classdev *led_cdev,
	146	unsigned long delay_on, unsigned long delay_off)
	147	{
	148	struct pca9532_led *led = ldev_to_led(led_cdev);
	149	struct i2c_client *client = led->client;
	150	int psc;
07172d2b	151	int err = 0;
e14fa824 RV	152
	153	if (delay_on == 0 && delay_off == 0) {
	154	/* led subsystem ask us for a blink rate */
85c5204a	155	*delay_on = 1000;
e14fa824 RV	156	*delay_off = 1000;
	157	}
	158	if (delay_on != delay_off \|\| delay_on > 1690 \|\| delay_on < 6)
	159	return -EINVAL;
	160
	161	/* Thecus specific: only use PSC/PWM 0 */
	162	psc = (delay_on 152-1)/1000;
07172d2b AO	163	err = pca9532_calcpwm(client, 0, psc, led_cdev->brightness);
	164	if (err)
	165	return err;
	166	schedule_work(&led->work);
	167	return 0;
e14fa824 RV	168	}
e14fa824 RV	169
0d733579 SW	170	static int pca9532_event(struct input_dev *dev, unsigned int type,
0d733579 SW	171	unsigned int code, int value)
e14fa824 RV	172	{
	173	struct pca9532_data *data = input_get_drvdata(dev);
	174
7fbc3a9b	175	if (!(type == EV_SND && (code == SND_BELL \|\| code == SND_TONE)))
e14fa824 RV	176	return -1;
	177
	178	/* XXX: allow different kind of beeps with psc/pwm modifications */
	179	if (value > 1 && value < 32767)
	180	data->pwm[1] = 127;
	181	else
	182	data->pwm[1] = 0;
	183
07172d2b	184	schedule_work(&data->work);
934cd3f9	185
07172d2b	186	return 0;
934cd3f9 RV	187	}
	188
	189	static void pca9532_input_work(struct work_struct *work)
	190	{
07172d2b AO	191	struct pca9532_data *data;
07172d2b AO	192	data = container_of(work, struct pca9532_data, work);
e14fa824 RV	193	mutex_lock(&data->update_lock);
	194	i2c_smbus_write_byte_data(data->client, PCA9532_REG_PWM(1),
	195	data->pwm[1]);
	196	mutex_unlock(&data->update_lock);
934cd3f9	197	}
e14fa824	198
934cd3f9 RV	199	static void pca9532_led_work(struct work_struct *work)
934cd3f9 RV	200	{
07172d2b AO	201	struct pca9532_led *led;
	202	led = container_of(work, struct pca9532_led, work);
	203	if (led->state == PCA9532_PWM0)
	204	pca9532_setpwm(led->client, 0);
	205	pca9532_setled(led);
e14fa824 RV	206	}
e14fa824 RV	207
3c1ab50d JE	208	#ifdef CONFIG_LEDS_PCA9532_GPIO
	209	static int pca9532_gpio_request_pin(struct gpio_chip *gc, unsigned offset)
	210	{
	211	struct pca9532_data *data = container_of(gc, struct pca9532_data, gpio);
	212	struct pca9532_led *led = &data->leds[offset];
	213
	214	if (led->type == PCA9532_TYPE_GPIO)
	215	return 0;
	216
	217	return -EBUSY;
	218	}
	219
	220	static void pca9532_gpio_set_value(struct gpio_chip *gc, unsigned offset, int val)
	221	{
	222	struct pca9532_data *data = container_of(gc, struct pca9532_data, gpio);
	223	struct pca9532_led *led = &data->leds[offset];
	224
	225	if (val)
	226	led->state = PCA9532_ON;
	227	else
	228	led->state = PCA9532_OFF;
	229
	230	pca9532_setled(led);
	231	}
	232
	233	static int pca9532_gpio_get_value(struct gpio_chip *gc, unsigned offset)
	234	{
	235	struct pca9532_data *data = container_of(gc, struct pca9532_data, gpio);
	236	unsigned char reg;
	237
	238	reg = i2c_smbus_read_byte_data(data->client, PCA9532_REG_INPUT(offset));
	239
	240	return !!(reg & (1 << (offset % 8)));
	241	}
	242
	243	static int pca9532_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
	244	{
	245	/* To use as input ensure pin is not driven */
	246	pca9532_gpio_set_value(gc, offset, 0);
	247
	248	return 0;
	249	}
	250
	251	static int pca9532_gpio_direction_output(struct gpio_chip *gc, unsigned offset, int val)
	252	{
	253	pca9532_gpio_set_value(gc, offset, val);
	254
	255	return 0;
	256	}
	257	#endif /* CONFIG_LEDS_PCA9532_GPIO */
	258
	259	static int pca9532_destroy_devices(struct pca9532_data *data, int n_devs)
125c7135 AL	260	{
	261	int i = n_devs;
	262
	263	if (!data)
3c1ab50d	264	return -EINVAL;
125c7135 AL	265
	266	while (--i >= 0) {
	267	switch (data->leds[i].type) {
	268	case PCA9532_TYPE_NONE:
3c1ab50d	269	case PCA9532_TYPE_GPIO:
125c7135 AL	270	break;
	271	case PCA9532_TYPE_LED:
	272	led_classdev_unregister(&data->leds[i].ldev);
	273	cancel_work_sync(&data->leds[i].work);
	274	break;
	275	case PCA9532_TYPE_N2100_BEEP:
	276	if (data->idev != NULL) {
	277	input_unregister_device(data->idev);
	278	cancel_work_sync(&data->work);
	279	data->idev = NULL;
	280	}
	281	break;
	282	}
	283	}
3c1ab50d JE	284
	285	#ifdef CONFIG_LEDS_PCA9532_GPIO
	286	if (data->gpio.dev) {
	287	int err = gpiochip_remove(&data->gpio);
	288	if (err) {
	289	dev_err(&data->client->dev, "%s failed, %d\n",
	290	"gpiochip_remove()", err);
	291	return err;
	292	}
	293	}
	294	#endif
	295
	296	return 0;
125c7135 AL	297	}
125c7135 AL	298
e14fa824 RV	299	static int pca9532_configure(struct i2c_client *client,
	300	struct pca9532_data data, struct pca9532_platform_data pdata)
	301	{
	302	int i, err = 0;
3c1ab50d	303	int gpios = 0;
e14fa824 RV	304
	305	for (i = 0; i < 2; i++) {
	306	data->pwm[i] = pdata->pwm[i];
	307	data->psc[i] = pdata->psc[i];
	308	i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(i),
	309	data->pwm[i]);
	310	i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(i),
	311	data->psc[i]);
	312	}
	313
	314	for (i = 0; i < 16; i++) {
	315	struct pca9532_led *led = &data->leds[i];
	316	struct pca9532_led *pled = &pdata->leds[i];
	317	led->client = client;
	318	led->id = i;
	319	led->type = pled->type;
	320	switch (led->type) {
	321	case PCA9532_TYPE_NONE:
	322	break;
3c1ab50d JE	323	case PCA9532_TYPE_GPIO:
	324	gpios++;
	325	break;
e14fa824 RV	326	case PCA9532_TYPE_LED:
e14fa824 RV	327	led->state = pled->state;
85c5204a	328	led->name = pled->name;
e14fa824 RV	329	led->ldev.name = led->name;
	330	led->ldev.brightness = LED_OFF;
	331	led->ldev.brightness_set = pca9532_set_brightness;
	332	led->ldev.blink_set = pca9532_set_blink;
07172d2b	333	INIT_WORK(&led->work, pca9532_led_work);
f785d022 SW	334	err = led_classdev_register(&client->dev, &led->ldev);
f785d022 SW	335	if (err < 0) {
e14fa824 RV	336	dev_err(&client->dev,
	337	"couldn't register LED %s\n",
	338	led->name);
	339	goto exit;
	340	}
	341	pca9532_setled(led);
	342	break;
	343	case PCA9532_TYPE_N2100_BEEP:
	344	BUG_ON(data->idev);
	345	led->state = PCA9532_PWM1;
	346	pca9532_setled(led);
	347	data->idev = input_allocate_device();
	348	if (data->idev == NULL) {
	349	err = -ENOMEM;
	350	goto exit;
	351	}
	352	data->idev->name = pled->name;
	353	data->idev->phys = "i2c/pca9532";
	354	data->idev->id.bustype = BUS_HOST;
85c5204a	355	data->idev->id.vendor = 0x001f;
e14fa824 RV	356	data->idev->id.product = 0x0001;
	357	data->idev->id.version = 0x0100;
	358	data->idev->evbit[0] = BIT_MASK(EV_SND);
	359	data->idev->sndbit[0] = BIT_MASK(SND_BELL) \|
	360	BIT_MASK(SND_TONE);
	361	data->idev->event = pca9532_event;
	362	input_set_drvdata(data->idev, data);
07172d2b	363	INIT_WORK(&data->work, pca9532_input_work);
e14fa824 RV	364	err = input_register_device(data->idev);
	365	if (err) {
	366	input_free_device(data->idev);
07172d2b	367	cancel_work_sync(&data->work);
e14fa824 RV	368	data->idev = NULL;
	369	goto exit;
	370	}
	371	break;
	372	}
	373	}
3c1ab50d JE	374
	375	#ifdef CONFIG_LEDS_PCA9532_GPIO
	376	if (gpios) {
	377	data->gpio.label = "gpio-pca9532";
	378	data->gpio.direction_input = pca9532_gpio_direction_input;
	379	data->gpio.direction_output = pca9532_gpio_direction_output;
	380	data->gpio.set = pca9532_gpio_set_value;
	381	data->gpio.get = pca9532_gpio_get_value;
	382	data->gpio.request = pca9532_gpio_request_pin;
	383	data->gpio.can_sleep = 1;
	384	data->gpio.base = pdata->gpio_base;
	385	data->gpio.ngpio = 16;
	386	data->gpio.dev = &client->dev;
	387	data->gpio.owner = THIS_MODULE;
	388
	389	err = gpiochip_add(&data->gpio);
	390	if (err) {
	391	/* Use data->gpio.dev as a flag for freeing gpiochip */
	392	data->gpio.dev = NULL;
	393	dev_warn(&client->dev, "could not add gpiochip\n");
	394	} else {
	395	dev_info(&client->dev, "gpios %i...%i\n",
	396	data->gpio.base, data->gpio.base +
	397	data->gpio.ngpio - 1);
	398	}
	399	}
	400	#endif
	401
e14fa824 RV	402	return 0;
	403
	404	exit:
125c7135	405	pca9532_destroy_devices(data, i);
e14fa824	406	return err;
e14fa824 RV	407	}
	408
	409	static int pca9532_probe(struct i2c_client *client,
	410	const struct i2c_device_id *id)
	411	{
	412	struct pca9532_data *data = i2c_get_clientdata(client);
	413	struct pca9532_platform_data *pca9532_pdata = client->dev.platform_data;
f785d022 SW	414	int err;
	415
	416	if (!pca9532_pdata)
	417	return -EIO;
e14fa824 RV	418
	419	if (!i2c_check_functionality(client->adapter,
	420	I2C_FUNC_SMBUS_BYTE_DATA))
	421	return -EIO;
	422
f785d022	423	data = kzalloc(sizeof(*data), GFP_KERNEL);
e14fa824 RV	424	if (!data)
	425	return -ENOMEM;
	426
	427	dev_info(&client->dev, "setting platform data\n");
	428	i2c_set_clientdata(client, data);
	429	data->client = client;
	430	mutex_init(&data->update_lock);
	431
f785d022	432	err = pca9532_configure(client, data, pca9532_pdata);
fbae3fb1	433	if (err)
f785d022	434	kfree(data);
e14fa824	435
f785d022	436	return err;
e14fa824 RV	437	}
	438
	439	static int pca9532_remove(struct i2c_client *client)
	440	{
	441	struct pca9532_data *data = i2c_get_clientdata(client);
3c1ab50d JE	442	int err;
	443
	444	err = pca9532_destroy_devices(data, 16);
	445	if (err)
	446	return err;
	447
e14fa824	448	kfree(data);
e14fa824 RV	449	return 0;
	450	}
	451
	452	static int __init pca9532_init(void)
	453	{
	454	return i2c_add_driver(&pca9532_driver);
	455	}
	456
	457	static void __exit pca9532_exit(void)
	458	{
	459	i2c_del_driver(&pca9532_driver);
	460	}
	461
b26e0ed4	462	MODULE_AUTHOR("Riku Voipio");
e14fa824 RV	463	MODULE_LICENSE("GPL");
	464	MODULE_DESCRIPTION("PCA 9532 LED dimmer");
	465
	466	module_init(pca9532_init);
	467	module_exit(pca9532_exit);
	468