[mirror_ubuntu-focal-kernel.git] / drivers / leds / leds-pca9532.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * pca9532.c - 16-bit Led dimmer
 *
 * Copyright (C) 2011 Jan Weitzel
 * Copyright (C) 2008 Riku Voipio
 *
 * Datasheet: http://www.nxp.com/documents/data_sheet/PCA9532.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>
#include <linux/of.h>
#include <linux/of_device.h>

/* m =  num_leds*/
#define PCA9532_REG_INPUT(i)	((i) >> 3)
#define PCA9532_REG_OFFSET(m)	((m) >> 4)
#define PCA9532_REG_PSC(m, i)	(PCA9532_REG_OFFSET(m) + 0x1 + (i) * 2)
#define PCA9532_REG_PWM(m, i)	(PCA9532_REG_OFFSET(m) + 0x2 + (i) * 2)
#define LED_REG(m, led)		(PCA9532_REG_OFFSET(m) + 0x5 + (led >> 2))
#define LED_NUM(led)		(led & 0x3)

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

struct pca9532_chip_info {
	u8	num_leds;
};

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
	const struct pca9532_chip_info *chip_info;
	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);

enum {
	pca9530,
	pca9531,
	pca9532,
	pca9533,
};

static const struct i2c_device_id pca9532_id[] = {
	{ "pca9530", pca9530 },
	{ "pca9531", pca9531 },
	{ "pca9532", pca9532 },
	{ "pca9533", pca9533 },
	{ }
};

MODULE_DEVICE_TABLE(i2c, pca9532_id);

static const struct pca9532_chip_info pca9532_chip_info_tbl[] = {
	[pca9530] = {
		.num_leds = 2,
	},
	[pca9531] = {
		.num_leds = 8,
	},
	[pca9532] = {
		.num_leds = 16,
	},
	[pca9533] = {
		.num_leds = 4,
	},
};

#ifdef CONFIG_OF
static const struct of_device_id of_pca9532_leds_match[] = {
	{ .compatible = "nxp,pca9530", .data = (void *)pca9530 },
	{ .compatible = "nxp,pca9531", .data = (void *)pca9531 },
	{ .compatible = "nxp,pca9532", .data = (void *)pca9532 },
	{ .compatible = "nxp,pca9533", .data = (void *)pca9533 },
	{},
};

MODULE_DEVICE_TABLE(of, of_pca9532_leds_match);
#endif

static struct i2c_driver pca9532_driver = {
	.driver = {
		.name = "leds-pca953x",
		.of_match_table = of_match_ptr(of_pca9532_leds_match),
	},
	.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 < data->chip_info->num_leds; 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);
	u8 maxleds = data->chip_info->num_leds;

	mutex_lock(&data->update_lock);
	i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(maxleds, pwm),
		data->pwm[pwm]);
	i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(maxleds, 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);
	u8 maxleds = data->chip_info->num_leds;
	char reg;

	mutex_lock(&data->update_lock);
	reg = i2c_smbus_read_byte_data(client, LED_REG(maxleds, 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(maxleds, led->id), reg);
	mutex_unlock(&data->update_lock);
}

static int 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 err;
	}
	if (led->state == PCA9532_PWM0)
		pca9532_setpwm(led->client, 0);
	pca9532_setled(led);
	return err;
}

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;
	if (led->state == PCA9532_PWM0)
		pca9532_setpwm(led->client, 0);
	pca9532_setled(led);

	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 =
		container_of(work, struct pca9532_data, work);
	u8 maxleds = data->chip_info->num_leds;

	mutex_lock(&data->update_lock);
	i2c_smbus_write_byte_data(data->client, PCA9532_REG_PWM(maxleds, 1),
		data->pwm[1]);
	mutex_unlock(&data->update_lock);
}

static enum pca9532_state pca9532_getled(struct pca9532_led *led)
{
	struct i2c_client *client = led->client;
	struct pca9532_data *data = i2c_get_clientdata(client);
	u8 maxleds = data->chip_info->num_leds;
	char reg;
	enum pca9532_state ret;

	mutex_lock(&data->update_lock);
	reg = i2c_smbus_read_byte_data(client, LED_REG(maxleds, led->id));
	ret = reg >> LED_NUM(led->id)/2;
	mutex_unlock(&data->update_lock);
	return ret;
}

#ifdef CONFIG_LEDS_PCA9532_GPIO
static int pca9532_gpio_request_pin(struct gpio_chip *gc, unsigned offset)
{
	struct pca9532_data *data = gpiochip_get_data(gc);
	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 = gpiochip_get_data(gc);
	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 = gpiochip_get_data(gc);
	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);
			break;
		case PCA9532_TYPE_N2100_BEEP:
			if (data->idev != NULL) {
				cancel_work_sync(&data->work);
				data->idev = NULL;
			}
			break;
		}
	}

#ifdef CONFIG_LEDS_PCA9532_GPIO
	if (data->gpio.parent)
		gpiochip_remove(&data->gpio);
#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;
	u8 maxleds = data->chip_info->num_leds;

	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(maxleds, i),
			data->pwm[i]);
		i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(maxleds, i),
			data->psc[i]);
	}

	for (i = 0; i < data->chip_info->num_leds; 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:
			if (pled->state == PCA9532_KEEP)
				led->state = pca9532_getled(led);
			else
				led->state = pled->state;
			led->name = pled->name;
			led->ldev.name = led->name;
			led->ldev.default_trigger = pled->default_trigger;
			led->ldev.brightness = LED_OFF;
			led->ldev.brightness_set_blocking =
						pca9532_set_brightness;
			led->ldev.blink_set = pca9532_set_blink;
			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 = devm_input_allocate_device(&client->dev);
			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) {
				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 = data->chip_info->num_leds;
		data->gpio.parent = &client->dev;
		data->gpio.owner = THIS_MODULE;

		err = gpiochip_add_data(&data->gpio, data);
		if (err) {
			/* Use data->gpio.dev as a flag for freeing gpiochip */
			data->gpio.parent = 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 struct pca9532_platform_data *
pca9532_of_populate_pdata(struct device *dev, struct device_node *np)
{
	struct pca9532_platform_data *pdata;
	struct device_node *child;
	const struct of_device_id *match;
	int devid, maxleds;
	int i = 0;
	const char *state;

	match = of_match_device(of_pca9532_leds_match, dev);
	if (!match)
		return ERR_PTR(-ENODEV);

	devid = (int)(uintptr_t)match->data;
	maxleds = pca9532_chip_info_tbl[devid].num_leds;

	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return ERR_PTR(-ENOMEM);

	for_each_child_of_node(np, child) {
		if (of_property_read_string(child, "label",
					    &pdata->leds[i].name))
			pdata->leds[i].name = child->name;
		of_property_read_u32(child, "type", &pdata->leds[i].type);
		of_property_read_string(child, "linux,default-trigger",
					&pdata->leds[i].default_trigger);
		if (!of_property_read_string(child, "default-state", &state)) {
			if (!strcmp(state, "on"))
				pdata->leds[i].state = PCA9532_ON;
			else if (!strcmp(state, "keep"))
				pdata->leds[i].state = PCA9532_KEEP;
		}
		if (++i >= maxleds) {
			of_node_put(child);
			break;
		}
	}

	return pdata;
}

static int pca9532_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
{
	int devid;
	const struct of_device_id *of_id;
	struct pca9532_data *data = i2c_get_clientdata(client);
	struct pca9532_platform_data *pca9532_pdata =
			dev_get_platdata(&client->dev);
	struct device_node *np = client->dev.of_node;

	if (!pca9532_pdata) {
		if (np) {
			pca9532_pdata =
				pca9532_of_populate_pdata(&client->dev, np);
			if (IS_ERR(pca9532_pdata))
				return PTR_ERR(pca9532_pdata);
		} else {
			dev_err(&client->dev, "no platform data\n");
			return -EINVAL;
		}
		of_id = of_match_device(of_pca9532_leds_match,
				&client->dev);
		if (unlikely(!of_id))
			return -EINVAL;
		devid = (int)(uintptr_t) of_id->data;
	} else {
		devid = id->driver_data;
	}

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

	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->chip_info = &pca9532_chip_info_tbl[devid];

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

	return pca9532_configure(client, data, pca9532_pdata);
}

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

	err = pca9532_destroy_devices(data, data->chip_info->num_leds);
	if (err)
		return err;

	return 0;
}

module_i2c_driver(pca9532_driver);

MODULE_AUTHOR("Riku Voipio");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("PCA 9532 LED dimmer");
Commit	Line	Data
b886d83c	1	// SPDX-License-Identifier: GPL-2.0-only
e14fa824 RV	2	/*
	3	* pca9532.c - 16-bit Led dimmer
	4	*
3dbf622c	5	* Copyright (C) 2011 Jan Weitzel
b26e0ed4	6	* Copyright (C) 2008 Riku Voipio
e14fa824	7	*
3dbf622c	8	* Datasheet: http://www.nxp.com/documents/data_sheet/PCA9532.pdf
e14fa824 RV	9	*/
	10
	11	#include <linux/module.h>
	12	#include <linux/i2c.h>
5a0e3ad6	13	#include <linux/slab.h>
e14fa824 RV	14	#include <linux/leds.h>
	15	#include <linux/input.h>
	16	#include <linux/mutex.h>
934cd3f9	17	#include <linux/workqueue.h>
e14fa824	18	#include <linux/leds-pca9532.h>
3c1ab50d	19	#include <linux/gpio.h>
fa4191a6 PR	20	#include <linux/of.h>
fa4191a6 PR	21	#include <linux/of_device.h>
e14fa824	22
3dbf622c JW	23	/* m = num_leds*/
	24	#define PCA9532_REG_INPUT(i) ((i) >> 3)
	25	#define PCA9532_REG_OFFSET(m) ((m) >> 4)
	26	#define PCA9532_REG_PSC(m, i) (PCA9532_REG_OFFSET(m) + 0x1 + (i) * 2)
	27	#define PCA9532_REG_PWM(m, i) (PCA9532_REG_OFFSET(m) + 0x2 + (i) * 2)
	28	#define LED_REG(m, led) (PCA9532_REG_OFFSET(m) + 0x5 + (led >> 2))
	29	#define LED_NUM(led) (led & 0x3)
e14fa824 RV	30
	31	#define ldev_to_led(c) container_of(c, struct pca9532_led, ldev)
	32
3dbf622c JW	33	struct pca9532_chip_info {
	34	u8 num_leds;
	35	};
	36
e14fa824 RV	37	struct pca9532_data {
	38	struct i2c_client *client;
	39	struct pca9532_led leds[16];
	40	struct mutex update_lock;
85c5204a	41	struct input_dev *idev;
07172d2b	42	struct work_struct work;
3c1ab50d JE	43	#ifdef CONFIG_LEDS_PCA9532_GPIO
	44	struct gpio_chip gpio;
	45	#endif
3dbf622c	46	const struct pca9532_chip_info *chip_info;
e14fa824 RV	47	u8 pwm[2];
	48	u8 psc[2];
	49	};
	50
	51	static int pca9532_probe(struct i2c_client *client,
	52	const struct i2c_device_id *id);
	53	static int pca9532_remove(struct i2c_client *client);
	54
3dbf622c JW	55	enum {
	56	pca9530,
	57	pca9531,
	58	pca9532,
	59	pca9533,
	60	};
	61
e14fa824	62	static const struct i2c_device_id pca9532_id[] = {
3dbf622c JW	63	{ "pca9530", pca9530 },
	64	{ "pca9531", pca9531 },
	65	{ "pca9532", pca9532 },
	66	{ "pca9533", pca9533 },
e14fa824 RV	67	{ }
	68	};
	69
	70	MODULE_DEVICE_TABLE(i2c, pca9532_id);
	71
3dbf622c JW	72	static const struct pca9532_chip_info pca9532_chip_info_tbl[] = {
	73	[pca9530] = {
	74	.num_leds = 2,
	75	},
	76	[pca9531] = {
	77	.num_leds = 8,
	78	},
	79	[pca9532] = {
	80	.num_leds = 16,
	81	},
	82	[pca9533] = {
	83	.num_leds = 4,
	84	},
	85	};
	86
fa4191a6 PR	87	#ifdef CONFIG_OF
	88	static const struct of_device_id of_pca9532_leds_match[] = {
	89	{ .compatible = "nxp,pca9530", .data = (void *)pca9530 },
	90	{ .compatible = "nxp,pca9531", .data = (void *)pca9531 },
	91	{ .compatible = "nxp,pca9532", .data = (void *)pca9532 },
	92	{ .compatible = "nxp,pca9533", .data = (void *)pca9533 },
	93	{},
	94	};
	95
	96	MODULE_DEVICE_TABLE(of, of_pca9532_leds_match);
	97	#endif
	98
e14fa824 RV	99	static struct i2c_driver pca9532_driver = {
e14fa824 RV	100	.driver = {
30cb35be	101	.name = "leds-pca953x",
fa4191a6	102	.of_match_table = of_match_ptr(of_pca9532_leds_match),
e14fa824	103	},
85c5204a	104	.probe = pca9532_probe,
e14fa824 RV	105	.remove = pca9532_remove,
	106	.id_table = pca9532_id,
	107	};
	108
25985edc	109	/* We have two pwm/blinkers, but 16 possible leds to drive. Additionally,
e14fa824 RV	110	* the clever Thecus people are using one pwm to drive the beeper. So,
	111	* as a compromise we average one pwm to the values requested by all
	112	* leds that are not ON/OFF.
	113	* */
934cd3f9	114	static int pca9532_calcpwm(struct i2c_client *client, int pwm, int blink,
e14fa824 RV	115	enum led_brightness value)
	116	{
	117	int a = 0, b = 0, i = 0;
	118	struct pca9532_data *data = i2c_get_clientdata(client);
3dbf622c	119	for (i = 0; i < data->chip_info->num_leds; i++) {
e14fa824 RV	120	if (data->leds[i].type == PCA9532_TYPE_LED &&
	121	data->leds[i].state == PCA9532_PWM0+pwm) {
	122	a++;
	123	b += data->leds[i].ldev.brightness;
	124	}
	125	}
	126	if (a == 0) {
	127	dev_err(&client->dev,
	128	"fear of division by zero %d/%d, wanted %d\n",
	129	b, a, value);
	130	return -EINVAL;
	131	}
	132	b = b/a;
	133	if (b > 0xFF)
	134	return -EINVAL;
e14fa824	135	data->pwm[pwm] = b;
07172d2b AO	136	data->psc[pwm] = blink;
07172d2b AO	137	return 0;
934cd3f9 RV	138	}
	139
	140	static int pca9532_setpwm(struct i2c_client *client, int pwm)
	141	{
07172d2b	142	struct pca9532_data *data = i2c_get_clientdata(client);
3dbf622c JW	143	u8 maxleds = data->chip_info->num_leds;
3dbf622c JW	144
07172d2b	145	mutex_lock(&data->update_lock);
3dbf622c	146	i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(maxleds, pwm),
e14fa824	147	data->pwm[pwm]);
3dbf622c	148	i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(maxleds, pwm),
e14fa824 RV	149	data->psc[pwm]);
	150	mutex_unlock(&data->update_lock);
	151	return 0;
	152	}
	153
	154	/* Set LED routing */
	155	static void pca9532_setled(struct pca9532_led *led)
	156	{
	157	struct i2c_client *client = led->client;
	158	struct pca9532_data *data = i2c_get_clientdata(client);
3dbf622c	159	u8 maxleds = data->chip_info->num_leds;
e14fa824 RV	160	char reg;
	161
	162	mutex_lock(&data->update_lock);
3dbf622c	163	reg = i2c_smbus_read_byte_data(client, LED_REG(maxleds, led->id));
e14fa824 RV	164	/* zero led bits */
	165	reg = reg & ~(0x3<<LED_NUM(led->id)*2);
	166	/* set the new value */
	167	reg = reg \| (led->state << LED_NUM(led->id)*2);
3dbf622c	168	i2c_smbus_write_byte_data(client, LED_REG(maxleds, led->id), reg);
e14fa824 RV	169	mutex_unlock(&data->update_lock);
	170	}
	171
00a88a19	172	static int pca9532_set_brightness(struct led_classdev *led_cdev,
e14fa824 RV	173	enum led_brightness value)
	174	{
	175	int err = 0;
	176	struct pca9532_led *led = ldev_to_led(led_cdev);
	177
	178	if (value == LED_OFF)
	179	led->state = PCA9532_OFF;
	180	else if (value == LED_FULL)
	181	led->state = PCA9532_ON;
	182	else {
	183	led->state = PCA9532_PWM0; /* Thecus: hardcode one pwm */
07172d2b	184	err = pca9532_calcpwm(led->client, 0, 0, value);
e14fa824	185	if (err)
00a88a19	186	return err;
e14fa824	187	}
00a88a19 AL	188	if (led->state == PCA9532_PWM0)
	189	pca9532_setpwm(led->client, 0);
	190	pca9532_setled(led);
	191	return err;
e14fa824 RV	192	}
	193
	194	static int pca9532_set_blink(struct led_classdev *led_cdev,
	195	unsigned long delay_on, unsigned long delay_off)
	196	{
	197	struct pca9532_led *led = ldev_to_led(led_cdev);
	198	struct i2c_client *client = led->client;
	199	int psc;
07172d2b	200	int err = 0;
e14fa824 RV	201
e14fa824 RV	202	if (delay_on == 0 && delay_off == 0) {
962363ce	203	/* led subsystem ask us for a blink rate */
85c5204a	204	*delay_on = 1000;
e14fa824 RV	205	*delay_off = 1000;
	206	}
	207	if (delay_on != delay_off \|\| delay_on > 1690 \|\| delay_on < 6)
	208	return -EINVAL;
	209
	210	/* Thecus specific: only use PSC/PWM 0 */
	211	psc = (delay_on 152-1)/1000;
07172d2b AO	212	err = pca9532_calcpwm(client, 0, psc, led_cdev->brightness);
	213	if (err)
	214	return err;
00a88a19 AL	215	if (led->state == PCA9532_PWM0)
	216	pca9532_setpwm(led->client, 0);
	217	pca9532_setled(led);
	218
07172d2b	219	return 0;
e14fa824 RV	220	}
e14fa824 RV	221
0d733579 SW	222	static int pca9532_event(struct input_dev *dev, unsigned int type,
0d733579 SW	223	unsigned int code, int value)
e14fa824 RV	224	{
	225	struct pca9532_data *data = input_get_drvdata(dev);
	226
7fbc3a9b	227	if (!(type == EV_SND && (code == SND_BELL \|\| code == SND_TONE)))
e14fa824 RV	228	return -1;
	229
	230	/* XXX: allow different kind of beeps with psc/pwm modifications */
	231	if (value > 1 && value < 32767)
	232	data->pwm[1] = 127;
	233	else
	234	data->pwm[1] = 0;
	235
07172d2b	236	schedule_work(&data->work);
934cd3f9	237
07172d2b	238	return 0;
934cd3f9 RV	239	}
	240
	241	static void pca9532_input_work(struct work_struct *work)
	242	{
3dbf622c JW	243	struct pca9532_data *data =
	244	container_of(work, struct pca9532_data, work);
	245	u8 maxleds = data->chip_info->num_leds;
	246
e14fa824	247	mutex_lock(&data->update_lock);
3dbf622c	248	i2c_smbus_write_byte_data(data->client, PCA9532_REG_PWM(maxleds, 1),
e14fa824 RV	249	data->pwm[1]);
e14fa824 RV	250	mutex_unlock(&data->update_lock);
934cd3f9	251	}
e14fa824	252
28c5fe99 FB	253	static enum pca9532_state pca9532_getled(struct pca9532_led *led)
	254	{
	255	struct i2c_client *client = led->client;
	256	struct pca9532_data *data = i2c_get_clientdata(client);
	257	u8 maxleds = data->chip_info->num_leds;
	258	char reg;
	259	enum pca9532_state ret;
	260
	261	mutex_lock(&data->update_lock);
	262	reg = i2c_smbus_read_byte_data(client, LED_REG(maxleds, led->id));
	263	ret = reg >> LED_NUM(led->id)/2;
	264	mutex_unlock(&data->update_lock);
	265	return ret;
	266	}
	267
3c1ab50d JE	268	#ifdef CONFIG_LEDS_PCA9532_GPIO
	269	static int pca9532_gpio_request_pin(struct gpio_chip *gc, unsigned offset)
	270	{
dced1467	271	struct pca9532_data *data = gpiochip_get_data(gc);
3c1ab50d JE	272	struct pca9532_led *led = &data->leds[offset];
	273
	274	if (led->type == PCA9532_TYPE_GPIO)
	275	return 0;
	276
	277	return -EBUSY;
	278	}
	279
	280	static void pca9532_gpio_set_value(struct gpio_chip *gc, unsigned offset, int val)
	281	{
dced1467	282	struct pca9532_data *data = gpiochip_get_data(gc);
3c1ab50d JE	283	struct pca9532_led *led = &data->leds[offset];
	284
	285	if (val)
	286	led->state = PCA9532_ON;
	287	else
	288	led->state = PCA9532_OFF;
	289
	290	pca9532_setled(led);
	291	}
	292
	293	static int pca9532_gpio_get_value(struct gpio_chip *gc, unsigned offset)
	294	{
dced1467	295	struct pca9532_data *data = gpiochip_get_data(gc);
3c1ab50d JE	296	unsigned char reg;
	297
	298	reg = i2c_smbus_read_byte_data(data->client, PCA9532_REG_INPUT(offset));
	299
	300	return !!(reg & (1 << (offset % 8)));
	301	}
	302
	303	static int pca9532_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
	304	{
	305	/* To use as input ensure pin is not driven */
	306	pca9532_gpio_set_value(gc, offset, 0);
	307
	308	return 0;
	309	}
	310
	311	static int pca9532_gpio_direction_output(struct gpio_chip *gc, unsigned offset, int val)
	312	{
	313	pca9532_gpio_set_value(gc, offset, val);
	314
	315	return 0;
	316	}
	317	#endif /* CONFIG_LEDS_PCA9532_GPIO */
	318
	319	static int pca9532_destroy_devices(struct pca9532_data *data, int n_devs)
125c7135 AL	320	{
	321	int i = n_devs;
	322
	323	if (!data)
3c1ab50d	324	return -EINVAL;
125c7135 AL	325
	326	while (--i >= 0) {
	327	switch (data->leds[i].type) {
	328	case PCA9532_TYPE_NONE:
3c1ab50d	329	case PCA9532_TYPE_GPIO:
125c7135 AL	330	break;
	331	case PCA9532_TYPE_LED:
	332	led_classdev_unregister(&data->leds[i].ldev);
125c7135 AL	333	break;
	334	case PCA9532_TYPE_N2100_BEEP:
	335	if (data->idev != NULL) {
125c7135 AL	336	cancel_work_sync(&data->work);
	337	data->idev = NULL;
	338	}
	339	break;
	340	}
	341	}
3c1ab50d JE	342
3c1ab50d JE	343	#ifdef CONFIG_LEDS_PCA9532_GPIO
58383c78	344	if (data->gpio.parent)
88d5e520	345	gpiochip_remove(&data->gpio);
3c1ab50d JE	346	#endif
	347
	348	return 0;
125c7135 AL	349	}
125c7135 AL	350
e14fa824 RV	351	static int pca9532_configure(struct i2c_client *client,
	352	struct pca9532_data data, struct pca9532_platform_data pdata)
	353	{
	354	int i, err = 0;
3c1ab50d	355	int gpios = 0;
3dbf622c	356	u8 maxleds = data->chip_info->num_leds;
e14fa824 RV	357
	358	for (i = 0; i < 2; i++) {
	359	data->pwm[i] = pdata->pwm[i];
	360	data->psc[i] = pdata->psc[i];
3dbf622c	361	i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(maxleds, i),
e14fa824	362	data->pwm[i]);
3dbf622c	363	i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(maxleds, i),
e14fa824 RV	364	data->psc[i]);
	365	}
	366
3dbf622c	367	for (i = 0; i < data->chip_info->num_leds; i++) {
e14fa824 RV	368	struct pca9532_led *led = &data->leds[i];
	369	struct pca9532_led *pled = &pdata->leds[i];
	370	led->client = client;
	371	led->id = i;
	372	led->type = pled->type;
	373	switch (led->type) {
	374	case PCA9532_TYPE_NONE:
	375	break;
3c1ab50d JE	376	case PCA9532_TYPE_GPIO:
	377	gpios++;
	378	break;
e14fa824	379	case PCA9532_TYPE_LED:
28c5fe99 FB	380	if (pled->state == PCA9532_KEEP)
	381	led->state = pca9532_getled(led);
	382	else
	383	led->state = pled->state;
85c5204a	384	led->name = pled->name;
e14fa824	385	led->ldev.name = led->name;
90a5537b	386	led->ldev.default_trigger = pled->default_trigger;
e14fa824	387	led->ldev.brightness = LED_OFF;
00a88a19 AL	388	led->ldev.brightness_set_blocking =
00a88a19 AL	389	pca9532_set_brightness;
e14fa824	390	led->ldev.blink_set = pca9532_set_blink;
f785d022 SW	391	err = led_classdev_register(&client->dev, &led->ldev);
f785d022 SW	392	if (err < 0) {
e14fa824 RV	393	dev_err(&client->dev,
	394	"couldn't register LED %s\n",
	395	led->name);
	396	goto exit;
	397	}
	398	pca9532_setled(led);
	399	break;
	400	case PCA9532_TYPE_N2100_BEEP:
	401	BUG_ON(data->idev);
	402	led->state = PCA9532_PWM1;
	403	pca9532_setled(led);
8614fb46	404	data->idev = devm_input_allocate_device(&client->dev);
e14fa824 RV	405	if (data->idev == NULL) {
	406	err = -ENOMEM;
	407	goto exit;
	408	}
	409	data->idev->name = pled->name;
	410	data->idev->phys = "i2c/pca9532";
	411	data->idev->id.bustype = BUS_HOST;
85c5204a	412	data->idev->id.vendor = 0x001f;
e14fa824 RV	413	data->idev->id.product = 0x0001;
	414	data->idev->id.version = 0x0100;
	415	data->idev->evbit[0] = BIT_MASK(EV_SND);
	416	data->idev->sndbit[0] = BIT_MASK(SND_BELL) \|
	417	BIT_MASK(SND_TONE);
	418	data->idev->event = pca9532_event;
	419	input_set_drvdata(data->idev, data);
07172d2b	420	INIT_WORK(&data->work, pca9532_input_work);
e14fa824 RV	421	err = input_register_device(data->idev);
e14fa824 RV	422	if (err) {
07172d2b	423	cancel_work_sync(&data->work);
e14fa824 RV	424	data->idev = NULL;
	425	goto exit;
	426	}
	427	break;
	428	}
	429	}
3c1ab50d JE	430
	431	#ifdef CONFIG_LEDS_PCA9532_GPIO
	432	if (gpios) {
	433	data->gpio.label = "gpio-pca9532";
	434	data->gpio.direction_input = pca9532_gpio_direction_input;
	435	data->gpio.direction_output = pca9532_gpio_direction_output;
	436	data->gpio.set = pca9532_gpio_set_value;
	437	data->gpio.get = pca9532_gpio_get_value;
	438	data->gpio.request = pca9532_gpio_request_pin;
	439	data->gpio.can_sleep = 1;
	440	data->gpio.base = pdata->gpio_base;
3dbf622c	441	data->gpio.ngpio = data->chip_info->num_leds;
58383c78	442	data->gpio.parent = &client->dev;
3c1ab50d JE	443	data->gpio.owner = THIS_MODULE;
3c1ab50d JE	444
dced1467	445	err = gpiochip_add_data(&data->gpio, data);
3c1ab50d JE	446	if (err) {
3c1ab50d JE	447	/* Use data->gpio.dev as a flag for freeing gpiochip */
58383c78	448	data->gpio.parent = NULL;
3c1ab50d JE	449	dev_warn(&client->dev, "could not add gpiochip\n");
	450	} else {
	451	dev_info(&client->dev, "gpios %i...%i\n",
	452	data->gpio.base, data->gpio.base +
	453	data->gpio.ngpio - 1);
	454	}
	455	}
	456	#endif
	457
e14fa824 RV	458	return 0;
	459
	460	exit:
125c7135	461	pca9532_destroy_devices(data, i);
e14fa824	462	return err;
e14fa824 RV	463	}
e14fa824 RV	464
fa4191a6 PR	465	static struct pca9532_platform_data *
	466	pca9532_of_populate_pdata(struct device dev, struct device_node np)
	467	{
	468	struct pca9532_platform_data *pdata;
	469	struct device_node *child;
	470	const struct of_device_id *match;
	471	int devid, maxleds;
	472	int i = 0;
28c5fe99	473	const char *state;
fa4191a6 PR	474
	475	match = of_match_device(of_pca9532_leds_match, dev);
	476	if (!match)
	477	return ERR_PTR(-ENODEV);
	478
	479	devid = (int)(uintptr_t)match->data;
	480	maxleds = pca9532_chip_info_tbl[devid].num_leds;
	481
	482	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	483	if (!pdata)
	484	return ERR_PTR(-ENOMEM);
	485
	486	for_each_child_of_node(np, child) {
	487	if (of_property_read_string(child, "label",
	488	&pdata->leds[i].name))
	489	pdata->leds[i].name = child->name;
	490	of_property_read_u32(child, "type", &pdata->leds[i].type);
	491	of_property_read_string(child, "linux,default-trigger",
	492	&pdata->leds[i].default_trigger);
28c5fe99 FB	493	if (!of_property_read_string(child, "default-state", &state)) {
	494	if (!strcmp(state, "on"))
	495	pdata->leds[i].state = PCA9532_ON;
	496	else if (!strcmp(state, "keep"))
	497	pdata->leds[i].state = PCA9532_KEEP;
	498	}
fa4191a6 PR	499	if (++i >= maxleds) {
	500	of_node_put(child);
	501	break;
	502	}
	503	}
	504
	505	return pdata;
	506	}
	507
e14fa824 RV	508	static int pca9532_probe(struct i2c_client *client,
	509	const struct i2c_device_id *id)
	510	{
fa4191a6	511	int devid;
0aab8e4d	512	const struct of_device_id *of_id;
e14fa824	513	struct pca9532_data *data = i2c_get_clientdata(client);
87aae1ea JH	514	struct pca9532_platform_data *pca9532_pdata =
87aae1ea JH	515	dev_get_platdata(&client->dev);
fa4191a6 PR	516	struct device_node *np = client->dev.of_node;
	517
	518	if (!pca9532_pdata) {
	519	if (np) {
	520	pca9532_pdata =
	521	pca9532_of_populate_pdata(&client->dev, np);
	522	if (IS_ERR(pca9532_pdata))
	523	return PTR_ERR(pca9532_pdata);
	524	} else {
	525	dev_err(&client->dev, "no platform data\n");
	526	return -EINVAL;
	527	}
0aab8e4d KL	528	of_id = of_match_device(of_pca9532_leds_match,
	529	&client->dev);
	530	if (unlikely(!of_id))
	531	return -EINVAL;
	532	devid = (int)(uintptr_t) of_id->data;
fa4191a6 PR	533	} else {
	534	devid = id->driver_data;
	535	}
e14fa824 RV	536
	537	if (!i2c_check_functionality(client->adapter,
	538	I2C_FUNC_SMBUS_BYTE_DATA))
	539	return -EIO;
	540
0f4630c9	541	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
e14fa824 RV	542	if (!data)
	543	return -ENOMEM;
	544
fa4191a6	545	data->chip_info = &pca9532_chip_info_tbl[devid];
3dbf622c	546
e14fa824 RV	547	dev_info(&client->dev, "setting platform data\n");
	548	i2c_set_clientdata(client, data);
	549	data->client = client;
	550	mutex_init(&data->update_lock);
	551
0f4630c9	552	return pca9532_configure(client, data, pca9532_pdata);
e14fa824 RV	553	}
	554
	555	static int pca9532_remove(struct i2c_client *client)
	556	{
	557	struct pca9532_data *data = i2c_get_clientdata(client);
3c1ab50d JE	558	int err;
3c1ab50d JE	559
3dbf622c	560	err = pca9532_destroy_devices(data, data->chip_info->num_leds);
3c1ab50d JE	561	if (err)
	562	return err;
	563
e14fa824 RV	564	return 0;
	565	}
	566
09a0d183	567	module_i2c_driver(pca9532_driver);
e14fa824	568
b26e0ed4	569	MODULE_AUTHOR("Riku Voipio");
e14fa824 RV	570	MODULE_LICENSE("GPL");
e14fa824 RV	571	MODULE_DESCRIPTION("PCA 9532 LED dimmer");