[linux-2.6-block.git] / drivers / mfd / lm3533-core.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * lm3533-core.c -- LM3533 Core
 *
 * Copyright (C) 2011-2012 Texas Instruments
 *
 * Author: Johan Hovold <jhovold@gmail.com>
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/regmap.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/uaccess.h>

#include <linux/mfd/lm3533.h>


#define LM3533_BOOST_OVP_MASK		0x06
#define LM3533_BOOST_OVP_SHIFT		1

#define LM3533_BOOST_FREQ_MASK		0x01
#define LM3533_BOOST_FREQ_SHIFT		0

#define LM3533_BL_ID_MASK		1
#define LM3533_LED_ID_MASK		3
#define LM3533_BL_ID_MAX		1
#define LM3533_LED_ID_MAX		3

#define LM3533_HVLED_ID_MAX		2
#define LM3533_LVLED_ID_MAX		5

#define LM3533_REG_OUTPUT_CONF1		0x10
#define LM3533_REG_OUTPUT_CONF2		0x11
#define LM3533_REG_BOOST_PWM		0x2c

#define LM3533_REG_MAX			0xb2


static struct mfd_cell lm3533_als_devs[] = {
	{
		.name	= "lm3533-als",
		.id	= -1,
	},
};

static struct mfd_cell lm3533_bl_devs[] = {
	{
		.name	= "lm3533-backlight",
		.id	= 0,
	},
	{
		.name	= "lm3533-backlight",
		.id	= 1,
	},
};

static struct mfd_cell lm3533_led_devs[] = {
	{
		.name	= "lm3533-leds",
		.id	= 0,
	},
	{
		.name	= "lm3533-leds",
		.id	= 1,
	},
	{
		.name	= "lm3533-leds",
		.id	= 2,
	},
	{
		.name	= "lm3533-leds",
		.id	= 3,
	},
};

int lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val)
{
	int tmp;
	int ret;

	ret = regmap_read(lm3533->regmap, reg, &tmp);
	if (ret < 0) {
		dev_err(lm3533->dev, "failed to read register %02x: %d\n",
								reg, ret);
		return ret;
	}

	*val = tmp;

	dev_dbg(lm3533->dev, "read [%02x]: %02x\n", reg, *val);

	return ret;
}
EXPORT_SYMBOL_GPL(lm3533_read);

int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val)
{
	int ret;

	dev_dbg(lm3533->dev, "write [%02x]: %02x\n", reg, val);

	ret = regmap_write(lm3533->regmap, reg, val);
	if (ret < 0) {
		dev_err(lm3533->dev, "failed to write register %02x: %d\n",
								reg, ret);
	}

	return ret;
}
EXPORT_SYMBOL_GPL(lm3533_write);

int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask)
{
	int ret;

	dev_dbg(lm3533->dev, "update [%02x]: %02x/%02x\n", reg, val, mask);

	ret = regmap_update_bits(lm3533->regmap, reg, mask, val);
	if (ret < 0) {
		dev_err(lm3533->dev, "failed to update register %02x: %d\n",
								reg, ret);
	}

	return ret;
}
EXPORT_SYMBOL_GPL(lm3533_update);

static int lm3533_set_boost_freq(struct lm3533 *lm3533,
						enum lm3533_boost_freq freq)
{
	int ret;

	ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
					freq << LM3533_BOOST_FREQ_SHIFT,
					LM3533_BOOST_FREQ_MASK);
	if (ret)
		dev_err(lm3533->dev, "failed to set boost frequency\n");

	return ret;
}


static int lm3533_set_boost_ovp(struct lm3533 *lm3533,
						enum lm3533_boost_ovp ovp)
{
	int ret;

	ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
					ovp << LM3533_BOOST_OVP_SHIFT,
					LM3533_BOOST_OVP_MASK);
	if (ret)
		dev_err(lm3533->dev, "failed to set boost ovp\n");

	return ret;
}

/*
 * HVLED output config -- output hvled controlled by backlight bl
 */
static int lm3533_set_hvled_config(struct lm3533 *lm3533, u8 hvled, u8 bl)
{
	u8 val;
	u8 mask;
	int shift;
	int ret;

	if (hvled == 0 || hvled > LM3533_HVLED_ID_MAX)
		return -EINVAL;

	if (bl > LM3533_BL_ID_MAX)
		return -EINVAL;

	shift = hvled - 1;
	mask = LM3533_BL_ID_MASK << shift;
	val = bl << shift;

	ret = lm3533_update(lm3533, LM3533_REG_OUTPUT_CONF1, val, mask);
	if (ret)
		dev_err(lm3533->dev, "failed to set hvled config\n");

	return ret;
}

/*
 * LVLED output config -- output lvled controlled by LED led
 */
static int lm3533_set_lvled_config(struct lm3533 *lm3533, u8 lvled, u8 led)
{
	u8 reg;
	u8 val;
	u8 mask;
	int shift;
	int ret;

	if (lvled == 0 || lvled > LM3533_LVLED_ID_MAX)
		return -EINVAL;

	if (led > LM3533_LED_ID_MAX)
		return -EINVAL;

	if (lvled < 4) {
		reg = LM3533_REG_OUTPUT_CONF1;
		shift = 2 * lvled;
	} else {
		reg = LM3533_REG_OUTPUT_CONF2;
		shift = 2 * (lvled - 4);
	}

	mask = LM3533_LED_ID_MASK << shift;
	val = led << shift;

	ret = lm3533_update(lm3533, reg, val, mask);
	if (ret)
		dev_err(lm3533->dev, "failed to set lvled config\n");

	return ret;
}

static void lm3533_enable(struct lm3533 *lm3533)
{
	if (gpio_is_valid(lm3533->gpio_hwen))
		gpio_set_value(lm3533->gpio_hwen, 1);
}

static void lm3533_disable(struct lm3533 *lm3533)
{
	if (gpio_is_valid(lm3533->gpio_hwen))
		gpio_set_value(lm3533->gpio_hwen, 0);
}

enum lm3533_attribute_type {
	LM3533_ATTR_TYPE_BACKLIGHT,
	LM3533_ATTR_TYPE_LED,
};

struct lm3533_device_attribute {
	struct device_attribute dev_attr;
	enum lm3533_attribute_type type;
	union {
		struct {
			u8 id;
		} output;
	} u;
};

#define to_lm3533_dev_attr(_attr) \
	container_of(_attr, struct lm3533_device_attribute, dev_attr)

static ssize_t show_output(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct lm3533 *lm3533 = dev_get_drvdata(dev);
	struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
	int id = lattr->u.output.id;
	u8 reg;
	u8 val;
	u8 mask;
	int shift;
	int ret;

	if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT) {
		reg = LM3533_REG_OUTPUT_CONF1;
		shift = id - 1;
		mask = LM3533_BL_ID_MASK << shift;
	} else {
		if (id < 4) {
			reg = LM3533_REG_OUTPUT_CONF1;
			shift = 2 * id;
		} else {
			reg = LM3533_REG_OUTPUT_CONF2;
			shift = 2 * (id - 4);
		}
		mask = LM3533_LED_ID_MASK << shift;
	}

	ret = lm3533_read(lm3533, reg, &val);
	if (ret)
		return ret;

	val = (val & mask) >> shift;

	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
}

static ssize_t store_output(struct device *dev,
					struct device_attribute *attr,
					const char *buf, size_t len)
{
	struct lm3533 *lm3533 = dev_get_drvdata(dev);
	struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
	int id = lattr->u.output.id;
	u8 val;
	int ret;

	if (kstrtou8(buf, 0, &val))
		return -EINVAL;

	if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT)
		ret = lm3533_set_hvled_config(lm3533, id, val);
	else
		ret = lm3533_set_lvled_config(lm3533, id, val);

	if (ret)
		return ret;

	return len;
}

#define LM3533_OUTPUT_ATTR(_name, _mode, _show, _store, _type, _id) \
	struct lm3533_device_attribute lm3533_dev_attr_##_name = \
		{ .dev_attr	= __ATTR(_name, _mode, _show, _store), \
		  .type		= _type, \
		  .u.output	= { .id = _id }, }

#define LM3533_OUTPUT_ATTR_RW(_name, _type, _id) \
	LM3533_OUTPUT_ATTR(output_##_name, S_IRUGO | S_IWUSR, \
					show_output, store_output, _type, _id)

#define LM3533_OUTPUT_HVLED_ATTR_RW(_nr) \
	LM3533_OUTPUT_ATTR_RW(hvled##_nr, LM3533_ATTR_TYPE_BACKLIGHT, _nr)
#define LM3533_OUTPUT_LVLED_ATTR_RW(_nr) \
	LM3533_OUTPUT_ATTR_RW(lvled##_nr, LM3533_ATTR_TYPE_LED, _nr)
/*
 * Output config:
 *
 * output_hvled<nr>	0-1
 * output_lvled<nr>	0-3
 */
static LM3533_OUTPUT_HVLED_ATTR_RW(1);
static LM3533_OUTPUT_HVLED_ATTR_RW(2);
static LM3533_OUTPUT_LVLED_ATTR_RW(1);
static LM3533_OUTPUT_LVLED_ATTR_RW(2);
static LM3533_OUTPUT_LVLED_ATTR_RW(3);
static LM3533_OUTPUT_LVLED_ATTR_RW(4);
static LM3533_OUTPUT_LVLED_ATTR_RW(5);

static struct attribute *lm3533_attributes[] = {
	&lm3533_dev_attr_output_hvled1.dev_attr.attr,
	&lm3533_dev_attr_output_hvled2.dev_attr.attr,
	&lm3533_dev_attr_output_lvled1.dev_attr.attr,
	&lm3533_dev_attr_output_lvled2.dev_attr.attr,
	&lm3533_dev_attr_output_lvled3.dev_attr.attr,
	&lm3533_dev_attr_output_lvled4.dev_attr.attr,
	&lm3533_dev_attr_output_lvled5.dev_attr.attr,
	NULL,
};

#define to_dev_attr(_attr) \
	container_of(_attr, struct device_attribute, attr)

static umode_t lm3533_attr_is_visible(struct kobject *kobj,
					     struct attribute *attr, int n)
{
	struct device *dev = container_of(kobj, struct device, kobj);
	struct lm3533 *lm3533 = dev_get_drvdata(dev);
	struct device_attribute *dattr = to_dev_attr(attr);
	struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(dattr);
	enum lm3533_attribute_type type = lattr->type;
	umode_t mode = attr->mode;

	if (!lm3533->have_backlights && type == LM3533_ATTR_TYPE_BACKLIGHT)
		mode = 0;
	else if (!lm3533->have_leds && type == LM3533_ATTR_TYPE_LED)
		mode = 0;

	return mode;
};

static struct attribute_group lm3533_attribute_group = {
	.is_visible	= lm3533_attr_is_visible,
	.attrs		= lm3533_attributes
};

static int lm3533_device_als_init(struct lm3533 *lm3533)
{
	struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
	int ret;

	if (!pdata->als)
		return 0;

	lm3533_als_devs[0].platform_data = pdata->als;
	lm3533_als_devs[0].pdata_size = sizeof(*pdata->als);

	ret = mfd_add_devices(lm3533->dev, 0, lm3533_als_devs, 1, NULL,
			      0, NULL);
	if (ret) {
		dev_err(lm3533->dev, "failed to add ALS device\n");
		return ret;
	}

	lm3533->have_als = 1;

	return 0;
}

static int lm3533_device_bl_init(struct lm3533 *lm3533)
{
	struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
	int i;
	int ret;

	if (!pdata->backlights || pdata->num_backlights == 0)
		return 0;

	if (pdata->num_backlights > ARRAY_SIZE(lm3533_bl_devs))
		pdata->num_backlights = ARRAY_SIZE(lm3533_bl_devs);

	for (i = 0; i < pdata->num_backlights; ++i) {
		lm3533_bl_devs[i].platform_data = &pdata->backlights[i];
		lm3533_bl_devs[i].pdata_size = sizeof(pdata->backlights[i]);
	}

	ret = mfd_add_devices(lm3533->dev, 0, lm3533_bl_devs,
			      pdata->num_backlights, NULL, 0, NULL);
	if (ret) {
		dev_err(lm3533->dev, "failed to add backlight devices\n");
		return ret;
	}

	lm3533->have_backlights = 1;

	return 0;
}

static int lm3533_device_led_init(struct lm3533 *lm3533)
{
	struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
	int i;
	int ret;

	if (!pdata->leds || pdata->num_leds == 0)
		return 0;

	if (pdata->num_leds > ARRAY_SIZE(lm3533_led_devs))
		pdata->num_leds = ARRAY_SIZE(lm3533_led_devs);

	for (i = 0; i < pdata->num_leds; ++i) {
		lm3533_led_devs[i].platform_data = &pdata->leds[i];
		lm3533_led_devs[i].pdata_size = sizeof(pdata->leds[i]);
	}

	ret = mfd_add_devices(lm3533->dev, 0, lm3533_led_devs,
			      pdata->num_leds, NULL, 0, NULL);
	if (ret) {
		dev_err(lm3533->dev, "failed to add LED devices\n");
		return ret;
	}

	lm3533->have_leds = 1;

	return 0;
}

static int lm3533_device_setup(struct lm3533 *lm3533,
					struct lm3533_platform_data *pdata)
{
	int ret;

	ret = lm3533_set_boost_freq(lm3533, pdata->boost_freq);
	if (ret)
		return ret;

	return lm3533_set_boost_ovp(lm3533, pdata->boost_ovp);
}

static int lm3533_device_init(struct lm3533 *lm3533)
{
	struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
	int ret;

	dev_dbg(lm3533->dev, "%s\n", __func__);

	if (!pdata) {
		dev_err(lm3533->dev, "no platform data\n");
		return -EINVAL;
	}

	lm3533->gpio_hwen = pdata->gpio_hwen;

	dev_set_drvdata(lm3533->dev, lm3533);

	if (gpio_is_valid(lm3533->gpio_hwen)) {
		ret = devm_gpio_request_one(lm3533->dev, lm3533->gpio_hwen,
					GPIOF_OUT_INIT_LOW, "lm3533-hwen");
		if (ret < 0) {
			dev_err(lm3533->dev,
				"failed to request HWEN GPIO %d\n",
				lm3533->gpio_hwen);
			return ret;
		}
	}

	lm3533_enable(lm3533);

	ret = lm3533_device_setup(lm3533, pdata);
	if (ret)
		goto err_disable;

	lm3533_device_als_init(lm3533);
	lm3533_device_bl_init(lm3533);
	lm3533_device_led_init(lm3533);

	ret = sysfs_create_group(&lm3533->dev->kobj, &lm3533_attribute_group);
	if (ret < 0) {
		dev_err(lm3533->dev, "failed to create sysfs attributes\n");
		goto err_unregister;
	}

	return 0;

err_unregister:
	mfd_remove_devices(lm3533->dev);
err_disable:
	lm3533_disable(lm3533);

	return ret;
}

static void lm3533_device_exit(struct lm3533 *lm3533)
{
	dev_dbg(lm3533->dev, "%s\n", __func__);

	sysfs_remove_group(&lm3533->dev->kobj, &lm3533_attribute_group);

	mfd_remove_devices(lm3533->dev);
	lm3533_disable(lm3533);
}

static bool lm3533_readable_register(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case 0x10 ... 0x2c:
	case 0x30 ... 0x38:
	case 0x40 ... 0x45:
	case 0x50 ... 0x57:
	case 0x60 ... 0x6e:
	case 0x70 ... 0x75:
	case 0x80 ... 0x85:
	case 0x90 ... 0x95:
	case 0xa0 ... 0xa5:
	case 0xb0 ... 0xb2:
		return true;
	default:
		return false;
	}
}

static bool lm3533_volatile_register(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case 0x34 ... 0x36:	/* zone */
	case 0x37 ... 0x38:	/* adc */
	case 0xb0 ... 0xb1:	/* fault */
		return true;
	default:
		return false;
	}
}

static bool lm3533_precious_register(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case 0x34:		/* zone */
		return true;
	default:
		return false;
	}
}

static const struct regmap_config regmap_config = {
	.reg_bits	= 8,
	.val_bits	= 8,
	.max_register	= LM3533_REG_MAX,
	.readable_reg	= lm3533_readable_register,
	.volatile_reg	= lm3533_volatile_register,
	.precious_reg	= lm3533_precious_register,
};

static int lm3533_i2c_probe(struct i2c_client *i2c,
					const struct i2c_device_id *id)
{
	struct lm3533 *lm3533;

	dev_dbg(&i2c->dev, "%s\n", __func__);

	lm3533 = devm_kzalloc(&i2c->dev, sizeof(*lm3533), GFP_KERNEL);
	if (!lm3533)
		return -ENOMEM;

	i2c_set_clientdata(i2c, lm3533);

	lm3533->regmap = devm_regmap_init_i2c(i2c, &regmap_config);
	if (IS_ERR(lm3533->regmap))
		return PTR_ERR(lm3533->regmap);

	lm3533->dev = &i2c->dev;
	lm3533->irq = i2c->irq;

	return lm3533_device_init(lm3533);
}

static int lm3533_i2c_remove(struct i2c_client *i2c)
{
	struct lm3533 *lm3533 = i2c_get_clientdata(i2c);

	dev_dbg(&i2c->dev, "%s\n", __func__);

	lm3533_device_exit(lm3533);

	return 0;
}

static const struct i2c_device_id lm3533_i2c_ids[] = {
	{ "lm3533", 0 },
	{ },
};
MODULE_DEVICE_TABLE(i2c, lm3533_i2c_ids);

static struct i2c_driver lm3533_i2c_driver = {
	.driver = {
		   .name = "lm3533",
	},
	.id_table	= lm3533_i2c_ids,
	.probe		= lm3533_i2c_probe,
	.remove		= lm3533_i2c_remove,
};

static int __init lm3533_i2c_init(void)
{
	return i2c_add_driver(&lm3533_i2c_driver);
}
subsys_initcall(lm3533_i2c_init);

static void __exit lm3533_i2c_exit(void)
{
	i2c_del_driver(&lm3533_i2c_driver);
}
module_exit(lm3533_i2c_exit);

MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
MODULE_DESCRIPTION("LM3533 Core");
MODULE_LICENSE("GPL");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
16c5c023 JH	2	/*
	3	* lm3533-core.c -- LM3533 Core
	4	*
	5	* Copyright (C) 2011-2012 Texas Instruments
	6	*
	7	* Author: Johan Hovold <jhovold@gmail.com>
16c5c023 JH	8	*/
	9
	10	#include <linux/module.h>
	11	#include <linux/init.h>
	12	#include <linux/kernel.h>
	13	#include <linux/err.h>
	14	#include <linux/gpio.h>
	15	#include <linux/i2c.h>
	16	#include <linux/mfd/core.h>
	17	#include <linux/regmap.h>
	18	#include <linux/seq_file.h>
	19	#include <linux/slab.h>
	20	#include <linux/uaccess.h>
	21
	22	#include <linux/mfd/lm3533.h>
	23
	24
16c5c023 JH	25	#define LM3533_BOOST_OVP_MASK 0x06
	26	#define LM3533_BOOST_OVP_SHIFT 1
	27
16c5c023 JH	28	#define LM3533_BOOST_FREQ_MASK 0x01
	29	#define LM3533_BOOST_FREQ_SHIFT 0
	30
	31	#define LM3533_BL_ID_MASK 1
	32	#define LM3533_LED_ID_MASK 3
	33	#define LM3533_BL_ID_MAX 1
	34	#define LM3533_LED_ID_MAX 3
	35
	36	#define LM3533_HVLED_ID_MAX 2
	37	#define LM3533_LVLED_ID_MAX 5
	38
	39	#define LM3533_REG_OUTPUT_CONF1 0x10
	40	#define LM3533_REG_OUTPUT_CONF2 0x11
	41	#define LM3533_REG_BOOST_PWM 0x2c
	42
	43	#define LM3533_REG_MAX 0xb2
	44
	45
	46	static struct mfd_cell lm3533_als_devs[] = {
	47	{
	48	.name = "lm3533-als",
	49	.id = -1,
	50	},
	51	};
	52
	53	static struct mfd_cell lm3533_bl_devs[] = {
	54	{
	55	.name = "lm3533-backlight",
	56	.id = 0,
	57	},
	58	{
	59	.name = "lm3533-backlight",
	60	.id = 1,
	61	},
	62	};
	63
	64	static struct mfd_cell lm3533_led_devs[] = {
	65	{
	66	.name = "lm3533-leds",
	67	.id = 0,
	68	},
	69	{
	70	.name = "lm3533-leds",
	71	.id = 1,
	72	},
	73	{
	74	.name = "lm3533-leds",
	75	.id = 2,
	76	},
	77	{
	78	.name = "lm3533-leds",
	79	.id = 3,
	80	},
	81	};
	82
	83	int lm3533_read(struct lm3533 lm3533, u8 reg, u8 val)
	84	{
	85	int tmp;
	86	int ret;
	87
	88	ret = regmap_read(lm3533->regmap, reg, &tmp);
	89	if (ret < 0) {
	90	dev_err(lm3533->dev, "failed to read register %02x: %d\n",
	91	reg, ret);
92	return ret;
93	}
94
95	*val = tmp;
96
97	dev_dbg(lm3533->dev, "read [%02x]: %02x\n", reg, *val);
98
99	return ret;
100	}
101	EXPORT_SYMBOL_GPL(lm3533_read);
102
103	int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val)
104	{
105	int ret;
106
107	dev_dbg(lm3533->dev, "write [%02x]: %02x\n", reg, val);
108
109	ret = regmap_write(lm3533->regmap, reg, val);
110	if (ret < 0) {
111	dev_err(lm3533->dev, "failed to write register %02x: %d\n",
112	reg, ret);
113	}
114
115	return ret;
116	}
117	EXPORT_SYMBOL_GPL(lm3533_write);
118
119	int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask)
120	{
121	int ret;
122
123	dev_dbg(lm3533->dev, "update [%02x]: %02x/%02x\n", reg, val, mask);
124
664dd066	125	ret = regmap_update_bits(lm3533->regmap, reg, mask, val);
16c5c023 JH	126	if (ret < 0) {
	127	dev_err(lm3533->dev, "failed to update register %02x: %d\n",
	128	reg, ret);
	129	}
	130
	131	return ret;
	132	}
	133	EXPORT_SYMBOL_GPL(lm3533_update);
	134
d9055dc5 JH	135	static int lm3533_set_boost_freq(struct lm3533 *lm3533,
	136	enum lm3533_boost_freq freq)
	137	{
	138	int ret;
	139
	140	ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
	141	freq << LM3533_BOOST_FREQ_SHIFT,
	142	LM3533_BOOST_FREQ_MASK);
	143	if (ret)
	144	dev_err(lm3533->dev, "failed to set boost frequency\n");
	145
	146	return ret;
	147	}
	148
	149
	150	static int lm3533_set_boost_ovp(struct lm3533 *lm3533,
	151	enum lm3533_boost_ovp ovp)
	152	{
	153	int ret;
	154
	155	ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
	156	ovp << LM3533_BOOST_OVP_SHIFT,
	157	LM3533_BOOST_OVP_MASK);
	158	if (ret)
	159	dev_err(lm3533->dev, "failed to set boost ovp\n");
	160
	161	return ret;
	162	}
	163
16c5c023 JH	164	/*
	165	* HVLED output config -- output hvled controlled by backlight bl
	166	*/
	167	static int lm3533_set_hvled_config(struct lm3533 *lm3533, u8 hvled, u8 bl)
	168	{
	169	u8 val;
	170	u8 mask;
	171	int shift;
	172	int ret;
	173
	174	if (hvled == 0 \|\| hvled > LM3533_HVLED_ID_MAX)
	175	return -EINVAL;
	176
	177	if (bl > LM3533_BL_ID_MAX)
	178	return -EINVAL;
	179
	180	shift = hvled - 1;
	181	mask = LM3533_BL_ID_MASK << shift;
	182	val = bl << shift;
	183
	184	ret = lm3533_update(lm3533, LM3533_REG_OUTPUT_CONF1, val, mask);
	185	if (ret)
	186	dev_err(lm3533->dev, "failed to set hvled config\n");
	187
	188	return ret;
	189	}
	190
	191	/*
	192	* LVLED output config -- output lvled controlled by LED led
	193	*/
	194	static int lm3533_set_lvled_config(struct lm3533 *lm3533, u8 lvled, u8 led)
	195	{
	196	u8 reg;
	197	u8 val;
	198	u8 mask;
	199	int shift;
	200	int ret;
	201
	202	if (lvled == 0 \|\| lvled > LM3533_LVLED_ID_MAX)
	203	return -EINVAL;
	204
	205	if (led > LM3533_LED_ID_MAX)
	206	return -EINVAL;
	207
	208	if (lvled < 4) {
	209	reg = LM3533_REG_OUTPUT_CONF1;
	210	shift = 2 * lvled;
	211	} else {
	212	reg = LM3533_REG_OUTPUT_CONF2;
	213	shift = 2 * (lvled - 4);
	214	}
	215
	216	mask = LM3533_LED_ID_MASK << shift;
	217	val = led << shift;
	218
	219	ret = lm3533_update(lm3533, reg, val, mask);
	220	if (ret)
	221	dev_err(lm3533->dev, "failed to set lvled config\n");
	222
	223	return ret;
	224	}
	225
	226	static void lm3533_enable(struct lm3533 *lm3533)
	227	{
228	if (gpio_is_valid(lm3533->gpio_hwen))
229	gpio_set_value(lm3533->gpio_hwen, 1);
230	}
231
232	static void lm3533_disable(struct lm3533 *lm3533)
233	{
234	if (gpio_is_valid(lm3533->gpio_hwen))
235	gpio_set_value(lm3533->gpio_hwen, 0);
236	}
237
238	enum lm3533_attribute_type {
239	LM3533_ATTR_TYPE_BACKLIGHT,
240	LM3533_ATTR_TYPE_LED,
241	};
242
243	struct lm3533_device_attribute {
244	struct device_attribute dev_attr;
245	enum lm3533_attribute_type type;
246	union {
247	struct {
248	u8 id;
249	} output;
16c5c023 JH	250	} u;
	251	};
	252
	253	#define to_lm3533_dev_attr(_attr) \
	254	container_of(_attr, struct lm3533_device_attribute, dev_attr)
	255
16c5c023 JH	256	static ssize_t show_output(struct device *dev,
	257	struct device_attribute attr, char buf)
	258	{
	259	struct lm3533 *lm3533 = dev_get_drvdata(dev);
	260	struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
	261	int id = lattr->u.output.id;
	262	u8 reg;
	263	u8 val;
	264	u8 mask;
	265	int shift;
	266	int ret;
	267
	268	if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT) {
	269	reg = LM3533_REG_OUTPUT_CONF1;
	270	shift = id - 1;
	271	mask = LM3533_BL_ID_MASK << shift;
	272	} else {
	273	if (id < 4) {
	274	reg = LM3533_REG_OUTPUT_CONF1;
	275	shift = 2 * id;
	276	} else {
	277	reg = LM3533_REG_OUTPUT_CONF2;
	278	shift = 2 * (id - 4);
	279	}
	280	mask = LM3533_LED_ID_MASK << shift;
	281	}
	282
	283	ret = lm3533_read(lm3533, reg, &val);
	284	if (ret)
	285	return ret;
	286
	287	val = (val & mask) >> shift;
	288
	289	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
	290	}
	291
	292	static ssize_t store_output(struct device *dev,
	293	struct device_attribute *attr,
	294	const char *buf, size_t len)
	295	{
	296	struct lm3533 *lm3533 = dev_get_drvdata(dev);
	297	struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
	298	int id = lattr->u.output.id;
	299	u8 val;
	300	int ret;
	301
	302	if (kstrtou8(buf, 0, &val))
	303	return -EINVAL;
	304
	305	if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT)
	306	ret = lm3533_set_hvled_config(lm3533, id, val);
	307	else
	308	ret = lm3533_set_lvled_config(lm3533, id, val);
	309
	310	if (ret)
	311	return ret;
	312
	313	return len;
	314	}
	315
	316	#define LM3533_OUTPUT_ATTR(_name, _mode, _show, _store, _type, _id) \
	317	struct lm3533_device_attribute lm3533_dev_attr_##_name = \
	318	{ .dev_attr = __ATTR(_name, _mode, _show, _store), \
	319	.type = _type, \
320	.u.output = { .id = _id }, }
321
322	#define LM3533_OUTPUT_ATTR_RW(_name, _type, _id) \
323	LM3533_OUTPUT_ATTR(output_##_name, S_IRUGO \| S_IWUSR, \
324	show_output, store_output, _type, _id)
325
326	#define LM3533_OUTPUT_HVLED_ATTR_RW(_nr) \
327	LM3533_OUTPUT_ATTR_RW(hvled##_nr, LM3533_ATTR_TYPE_BACKLIGHT, _nr)
328	#define LM3533_OUTPUT_LVLED_ATTR_RW(_nr) \
329	LM3533_OUTPUT_ATTR_RW(lvled##_nr, LM3533_ATTR_TYPE_LED, _nr)
330	/*
331	* Output config:
332	*
333	* output_hvled<nr> 0-1
334	* output_lvled<nr> 0-3
335	*/
336	static LM3533_OUTPUT_HVLED_ATTR_RW(1);
337	static LM3533_OUTPUT_HVLED_ATTR_RW(2);
338	static LM3533_OUTPUT_LVLED_ATTR_RW(1);
339	static LM3533_OUTPUT_LVLED_ATTR_RW(2);
340	static LM3533_OUTPUT_LVLED_ATTR_RW(3);
341	static LM3533_OUTPUT_LVLED_ATTR_RW(4);
342	static LM3533_OUTPUT_LVLED_ATTR_RW(5);
343
344	static struct attribute *lm3533_attributes[] = {
16c5c023 JH	345	&lm3533_dev_attr_output_hvled1.dev_attr.attr,
	346	&lm3533_dev_attr_output_hvled2.dev_attr.attr,
	347	&lm3533_dev_attr_output_lvled1.dev_attr.attr,
	348	&lm3533_dev_attr_output_lvled2.dev_attr.attr,
	349	&lm3533_dev_attr_output_lvled3.dev_attr.attr,
	350	&lm3533_dev_attr_output_lvled4.dev_attr.attr,
	351	&lm3533_dev_attr_output_lvled5.dev_attr.attr,
	352	NULL,
	353	};
	354
	355	#define to_dev_attr(_attr) \
	356	container_of(_attr, struct device_attribute, attr)
	357
168755eb	358	static umode_t lm3533_attr_is_visible(struct kobject *kobj,
16c5c023 JH	359	struct attribute *attr, int n)
	360	{
	361	struct device *dev = container_of(kobj, struct device, kobj);
	362	struct lm3533 *lm3533 = dev_get_drvdata(dev);
	363	struct device_attribute *dattr = to_dev_attr(attr);
	364	struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(dattr);
	365	enum lm3533_attribute_type type = lattr->type;
60908855	366	umode_t mode = attr->mode;
16c5c023 JH	367
	368	if (!lm3533->have_backlights && type == LM3533_ATTR_TYPE_BACKLIGHT)
	369	mode = 0;
	370	else if (!lm3533->have_leds && type == LM3533_ATTR_TYPE_LED)
	371	mode = 0;
	372
	373	return mode;
	374	};
	375
	376	static struct attribute_group lm3533_attribute_group = {
	377	.is_visible = lm3533_attr_is_visible,
	378	.attrs = lm3533_attributes
	379	};
	380
f791be49	381	static int lm3533_device_als_init(struct lm3533 *lm3533)
16c5c023	382	{
334a41ce	383	struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
16c5c023 JH	384	int ret;
	385
	386	if (!pdata->als)
	387	return 0;
	388
	389	lm3533_als_devs[0].platform_data = pdata->als;
	390	lm3533_als_devs[0].pdata_size = sizeof(*pdata->als);
	391
0848c94f MB	392	ret = mfd_add_devices(lm3533->dev, 0, lm3533_als_devs, 1, NULL,
0848c94f MB	393	0, NULL);
16c5c023 JH	394	if (ret) {
	395	dev_err(lm3533->dev, "failed to add ALS device\n");
	396	return ret;
	397	}
	398
	399	lm3533->have_als = 1;
	400
	401	return 0;
	402	}
	403
f791be49	404	static int lm3533_device_bl_init(struct lm3533 *lm3533)
16c5c023	405	{
334a41ce	406	struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
16c5c023 JH	407	int i;
	408	int ret;
	409
	410	if (!pdata->backlights \|\| pdata->num_backlights == 0)
	411	return 0;
	412
	413	if (pdata->num_backlights > ARRAY_SIZE(lm3533_bl_devs))
	414	pdata->num_backlights = ARRAY_SIZE(lm3533_bl_devs);
	415
	416	for (i = 0; i < pdata->num_backlights; ++i) {
	417	lm3533_bl_devs[i].platform_data = &pdata->backlights[i];
	418	lm3533_bl_devs[i].pdata_size = sizeof(pdata->backlights[i]);
	419	}
	420
	421	ret = mfd_add_devices(lm3533->dev, 0, lm3533_bl_devs,
0848c94f	422	pdata->num_backlights, NULL, 0, NULL);
16c5c023 JH	423	if (ret) {
	424	dev_err(lm3533->dev, "failed to add backlight devices\n");
	425	return ret;
	426	}
	427
	428	lm3533->have_backlights = 1;
	429
	430	return 0;
	431	}
	432
f791be49	433	static int lm3533_device_led_init(struct lm3533 *lm3533)
16c5c023	434	{
334a41ce	435	struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
16c5c023 JH	436	int i;
	437	int ret;
	438
	439	if (!pdata->leds \|\| pdata->num_leds == 0)
	440	return 0;
	441
	442	if (pdata->num_leds > ARRAY_SIZE(lm3533_led_devs))
	443	pdata->num_leds = ARRAY_SIZE(lm3533_led_devs);
	444
	445	for (i = 0; i < pdata->num_leds; ++i) {
	446	lm3533_led_devs[i].platform_data = &pdata->leds[i];
	447	lm3533_led_devs[i].pdata_size = sizeof(pdata->leds[i]);
	448	}
	449
	450	ret = mfd_add_devices(lm3533->dev, 0, lm3533_led_devs,
0848c94f	451	pdata->num_leds, NULL, 0, NULL);
16c5c023 JH	452	if (ret) {
	453	dev_err(lm3533->dev, "failed to add LED devices\n");
	454	return ret;
	455	}
	456
	457	lm3533->have_leds = 1;
	458
	459	return 0;
	460	}
	461
f791be49	462	static int lm3533_device_setup(struct lm3533 *lm3533,
d9055dc5 JH	463	struct lm3533_platform_data *pdata)
	464	{
	465	int ret;
	466
	467	ret = lm3533_set_boost_freq(lm3533, pdata->boost_freq);
	468	if (ret)
	469	return ret;
	470
a1c16d71	471	return lm3533_set_boost_ovp(lm3533, pdata->boost_ovp);
d9055dc5 JH	472	}
d9055dc5 JH	473
f791be49	474	static int lm3533_device_init(struct lm3533 *lm3533)
16c5c023	475	{
334a41ce	476	struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
16c5c023 JH	477	int ret;
	478
	479	dev_dbg(lm3533->dev, "%s\n", __func__);
	480
	481	if (!pdata) {
	482	dev_err(lm3533->dev, "no platform data\n");
	483	return -EINVAL;
	484	}
	485
	486	lm3533->gpio_hwen = pdata->gpio_hwen;
	487
	488	dev_set_drvdata(lm3533->dev, lm3533);
	489
	490	if (gpio_is_valid(lm3533->gpio_hwen)) {
bf5ea28a JH	491	ret = devm_gpio_request_one(lm3533->dev, lm3533->gpio_hwen,
bf5ea28a JH	492	GPIOF_OUT_INIT_LOW, "lm3533-hwen");
16c5c023 JH	493	if (ret < 0) {
	494	dev_err(lm3533->dev,
	495	"failed to request HWEN GPIO %d\n",
	496	lm3533->gpio_hwen);
	497	return ret;
	498	}
	499	}
	500
	501	lm3533_enable(lm3533);
	502
d9055dc5 JH	503	ret = lm3533_device_setup(lm3533, pdata);
	504	if (ret)
	505	goto err_disable;
	506
16c5c023 JH	507	lm3533_device_als_init(lm3533);
	508	lm3533_device_bl_init(lm3533);
	509	lm3533_device_led_init(lm3533);
	510
	511	ret = sysfs_create_group(&lm3533->dev->kobj, &lm3533_attribute_group);
	512	if (ret < 0) {
	513	dev_err(lm3533->dev, "failed to create sysfs attributes\n");
	514	goto err_unregister;
	515	}
	516
	517	return 0;
	518
	519	err_unregister:
	520	mfd_remove_devices(lm3533->dev);
d9055dc5	521	err_disable:
16c5c023	522	lm3533_disable(lm3533);
16c5c023 JH	523
	524	return ret;
	525	}
	526
4740f73f	527	static void lm3533_device_exit(struct lm3533 *lm3533)
16c5c023 JH	528	{
	529	dev_dbg(lm3533->dev, "%s\n", __func__);
	530
	531	sysfs_remove_group(&lm3533->dev->kobj, &lm3533_attribute_group);
	532
	533	mfd_remove_devices(lm3533->dev);
	534	lm3533_disable(lm3533);
16c5c023 JH	535	}
	536
	537	static bool lm3533_readable_register(struct device *dev, unsigned int reg)
	538	{
	539	switch (reg) {
	540	case 0x10 ... 0x2c:
	541	case 0x30 ... 0x38:
	542	case 0x40 ... 0x45:
	543	case 0x50 ... 0x57:
	544	case 0x60 ... 0x6e:
	545	case 0x70 ... 0x75:
	546	case 0x80 ... 0x85:
	547	case 0x90 ... 0x95:
	548	case 0xa0 ... 0xa5:
	549	case 0xb0 ... 0xb2:
	550	return true;
	551	default:
	552	return false;
	553	}
	554	}
	555
	556	static bool lm3533_volatile_register(struct device *dev, unsigned int reg)
	557	{
	558	switch (reg) {
c48bf153	559	case 0x34 ... 0x36: /* zone */
16c5c023 JH	560	case 0x37 ... 0x38: /* adc */
	561	case 0xb0 ... 0xb1: /* fault */
	562	return true;
	563	default:
	564	return false;
	565	}
	566	}
	567
	568	static bool lm3533_precious_register(struct device *dev, unsigned int reg)
	569	{
	570	switch (reg) {
	571	case 0x34: /* zone */
	572	return true;
	573	default:
	574	return false;
	575	}
	576	}
	577
dd635161	578	static const struct regmap_config regmap_config = {
16c5c023 JH	579	.reg_bits = 8,
	580	.val_bits = 8,
	581	.max_register = LM3533_REG_MAX,
	582	.readable_reg = lm3533_readable_register,
	583	.volatile_reg = lm3533_volatile_register,
	584	.precious_reg = lm3533_precious_register,
	585	};
	586
f791be49	587	static int lm3533_i2c_probe(struct i2c_client *i2c,
16c5c023 JH	588	const struct i2c_device_id *id)
	589	{
	590	struct lm3533 *lm3533;
16c5c023 JH	591
	592	dev_dbg(&i2c->dev, "%s\n", __func__);
	593
fa648e51	594	lm3533 = devm_kzalloc(&i2c->dev, sizeof(*lm3533), GFP_KERNEL);
16c5c023 JH	595	if (!lm3533)
	596	return -ENOMEM;
	597
	598	i2c_set_clientdata(i2c, lm3533);
	599
fa648e51 JH	600	lm3533->regmap = devm_regmap_init_i2c(i2c, &regmap_config);
	601	if (IS_ERR(lm3533->regmap))
	602	return PTR_ERR(lm3533->regmap);
16c5c023 JH	603
	604	lm3533->dev = &i2c->dev;
	605	lm3533->irq = i2c->irq;
	606
a1c16d71	607	return lm3533_device_init(lm3533);
16c5c023 JH	608	}
16c5c023 JH	609
4740f73f	610	static int lm3533_i2c_remove(struct i2c_client *i2c)
16c5c023 JH	611	{
	612	struct lm3533 *lm3533 = i2c_get_clientdata(i2c);
	613
	614	dev_dbg(&i2c->dev, "%s\n", __func__);
	615
	616	lm3533_device_exit(lm3533);
16c5c023 JH	617
	618	return 0;
	619	}
	620
	621	static const struct i2c_device_id lm3533_i2c_ids[] = {
	622	{ "lm3533", 0 },
	623	{ },
	624	};
	625	MODULE_DEVICE_TABLE(i2c, lm3533_i2c_ids);
	626
	627	static struct i2c_driver lm3533_i2c_driver = {
	628	.driver = {
	629	.name = "lm3533",
16c5c023 JH	630	},
	631	.id_table = lm3533_i2c_ids,
	632	.probe = lm3533_i2c_probe,
84449216	633	.remove = lm3533_i2c_remove,
16c5c023 JH	634	};
	635
	636	static int __init lm3533_i2c_init(void)
	637	{
	638	return i2c_add_driver(&lm3533_i2c_driver);
	639	}
	640	subsys_initcall(lm3533_i2c_init);
	641
	642	static void __exit lm3533_i2c_exit(void)
	643	{
	644	i2c_del_driver(&lm3533_i2c_driver);
	645	}
	646	module_exit(lm3533_i2c_exit);
	647
	648	MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
	649	MODULE_DESCRIPTION("LM3533 Core");
	650	MODULE_LICENSE("GPL");