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

/*
 * lm3533-core.c -- LM3533 Core
 *
 * Copyright (C) 2011-2012 Texas Instruments
 *
 * Author: Johan Hovold <[email protected]>
 *
 * 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;  either version 2 of the License, or (at your
 * option) any later version.
 */

#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 <[email protected]>");
MODULE_DESCRIPTION("LM3533 Core");
MODULE_LICENSE("GPL");
Commit	Line	Data
16c5c023 JH	1	/*
	2	* lm3533-core.c -- LM3533 Core
	3	*
	4	* Copyright (C) 2011-2012 Texas Instruments
	5	*
	6	* Author: Johan Hovold <[email protected]>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/init.h>
	16	#include <linux/kernel.h>
	17	#include <linux/err.h>
	18	#include <linux/gpio.h>
	19	#include <linux/i2c.h>
	20	#include <linux/mfd/core.h>
	21	#include <linux/regmap.h>
	22	#include <linux/seq_file.h>
	23	#include <linux/slab.h>
	24	#include <linux/uaccess.h>
	25
	26	#include <linux/mfd/lm3533.h>
	27
	28
16c5c023 JH	29	#define LM3533_BOOST_OVP_MASK 0x06
	30	#define LM3533_BOOST_OVP_SHIFT 1
	31
16c5c023 JH	32	#define LM3533_BOOST_FREQ_MASK 0x01
	33	#define LM3533_BOOST_FREQ_SHIFT 0
	34
	35	#define LM3533_BL_ID_MASK 1
	36	#define LM3533_LED_ID_MASK 3
	37	#define LM3533_BL_ID_MAX 1
	38	#define LM3533_LED_ID_MAX 3
	39
	40	#define LM3533_HVLED_ID_MAX 2
	41	#define LM3533_LVLED_ID_MAX 5
	42
	43	#define LM3533_REG_OUTPUT_CONF1 0x10
	44	#define LM3533_REG_OUTPUT_CONF2 0x11
	45	#define LM3533_REG_BOOST_PWM 0x2c
	46
	47	#define LM3533_REG_MAX 0xb2
	48
	49
	50	static struct mfd_cell lm3533_als_devs[] = {
	51	{
	52	.name = "lm3533-als",
	53	.id = -1,
	54	},
	55	};
	56
	57	static struct mfd_cell lm3533_bl_devs[] = {
	58	{
	59	.name = "lm3533-backlight",
	60	.id = 0,
	61	},
	62	{
	63	.name = "lm3533-backlight",
	64	.id = 1,
	65	},
	66	};
	67
	68	static struct mfd_cell lm3533_led_devs[] = {
	69	{
	70	.name = "lm3533-leds",
	71	.id = 0,
	72	},
	73	{
	74	.name = "lm3533-leds",
	75	.id = 1,
	76	},
	77	{
	78	.name = "lm3533-leds",
	79	.id = 2,
	80	},
	81	{
	82	.name = "lm3533-leds",
	83	.id = 3,
	84	},
	85	};
	86
	87	int lm3533_read(struct lm3533 lm3533, u8 reg, u8 val)
	88	{
	89	int tmp;
	90	int ret;
	91
	92	ret = regmap_read(lm3533->regmap, reg, &tmp);
	93	if (ret < 0) {
	94	dev_err(lm3533->dev, "failed to read register %02x: %d\n",
	95	reg, ret);
96	return ret;
97	}
98
99	*val = tmp;
100
101	dev_dbg(lm3533->dev, "read [%02x]: %02x\n", reg, *val);
102
103	return ret;
104	}
105	EXPORT_SYMBOL_GPL(lm3533_read);
106
107	int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val)
108	{
109	int ret;
110
111	dev_dbg(lm3533->dev, "write [%02x]: %02x\n", reg, val);
112
113	ret = regmap_write(lm3533->regmap, reg, val);
114	if (ret < 0) {
115	dev_err(lm3533->dev, "failed to write register %02x: %d\n",
116	reg, ret);
117	}
118
119	return ret;
120	}
121	EXPORT_SYMBOL_GPL(lm3533_write);
122
123	int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask)
124	{
125	int ret;
126
127	dev_dbg(lm3533->dev, "update [%02x]: %02x/%02x\n", reg, val, mask);
128
664dd066	129	ret = regmap_update_bits(lm3533->regmap, reg, mask, val);
16c5c023 JH	130	if (ret < 0) {
	131	dev_err(lm3533->dev, "failed to update register %02x: %d\n",
	132	reg, ret);
	133	}
	134
	135	return ret;
	136	}
	137	EXPORT_SYMBOL_GPL(lm3533_update);
	138
d9055dc5 JH	139	static int lm3533_set_boost_freq(struct lm3533 *lm3533,
	140	enum lm3533_boost_freq freq)
	141	{
	142	int ret;
	143
	144	ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
	145	freq << LM3533_BOOST_FREQ_SHIFT,
	146	LM3533_BOOST_FREQ_MASK);
	147	if (ret)
	148	dev_err(lm3533->dev, "failed to set boost frequency\n");
	149
	150	return ret;
	151	}
	152
	153
	154	static int lm3533_set_boost_ovp(struct lm3533 *lm3533,
	155	enum lm3533_boost_ovp ovp)
	156	{
	157	int ret;
	158
	159	ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
	160	ovp << LM3533_BOOST_OVP_SHIFT,
	161	LM3533_BOOST_OVP_MASK);
	162	if (ret)
	163	dev_err(lm3533->dev, "failed to set boost ovp\n");
	164
	165	return ret;
	166	}
	167
16c5c023 JH	168	/*
	169	* HVLED output config -- output hvled controlled by backlight bl
	170	*/
	171	static int lm3533_set_hvled_config(struct lm3533 *lm3533, u8 hvled, u8 bl)
	172	{
	173	u8 val;
	174	u8 mask;
	175	int shift;
	176	int ret;
	177
	178	if (hvled == 0 \|\| hvled > LM3533_HVLED_ID_MAX)
	179	return -EINVAL;
	180
	181	if (bl > LM3533_BL_ID_MAX)
	182	return -EINVAL;
	183
	184	shift = hvled - 1;
	185	mask = LM3533_BL_ID_MASK << shift;
	186	val = bl << shift;
	187
	188	ret = lm3533_update(lm3533, LM3533_REG_OUTPUT_CONF1, val, mask);
	189	if (ret)
	190	dev_err(lm3533->dev, "failed to set hvled config\n");
	191
	192	return ret;
	193	}
	194
	195	/*
	196	* LVLED output config -- output lvled controlled by LED led
	197	*/
	198	static int lm3533_set_lvled_config(struct lm3533 *lm3533, u8 lvled, u8 led)
	199	{
	200	u8 reg;
	201	u8 val;
	202	u8 mask;
	203	int shift;
	204	int ret;
	205
	206	if (lvled == 0 \|\| lvled > LM3533_LVLED_ID_MAX)
	207	return -EINVAL;
	208
	209	if (led > LM3533_LED_ID_MAX)
	210	return -EINVAL;
	211
	212	if (lvled < 4) {
	213	reg = LM3533_REG_OUTPUT_CONF1;
	214	shift = 2 * lvled;
	215	} else {
	216	reg = LM3533_REG_OUTPUT_CONF2;
	217	shift = 2 * (lvled - 4);
	218	}
	219
	220	mask = LM3533_LED_ID_MASK << shift;
	221	val = led << shift;
	222
	223	ret = lm3533_update(lm3533, reg, val, mask);
	224	if (ret)
	225	dev_err(lm3533->dev, "failed to set lvled config\n");
	226
	227	return ret;
	228	}
	229
	230	static void lm3533_enable(struct lm3533 *lm3533)
	231	{
232	if (gpio_is_valid(lm3533->gpio_hwen))
233	gpio_set_value(lm3533->gpio_hwen, 1);
234	}
235
236	static void lm3533_disable(struct lm3533 *lm3533)
237	{
238	if (gpio_is_valid(lm3533->gpio_hwen))
239	gpio_set_value(lm3533->gpio_hwen, 0);
240	}
241
242	enum lm3533_attribute_type {
243	LM3533_ATTR_TYPE_BACKLIGHT,
244	LM3533_ATTR_TYPE_LED,
245	};
246
247	struct lm3533_device_attribute {
248	struct device_attribute dev_attr;
249	enum lm3533_attribute_type type;
250	union {
251	struct {
252	u8 id;
253	} output;
16c5c023 JH	254	} u;
	255	};
	256
	257	#define to_lm3533_dev_attr(_attr) \
	258	container_of(_attr, struct lm3533_device_attribute, dev_attr)
	259
16c5c023 JH	260	static ssize_t show_output(struct device *dev,
	261	struct device_attribute attr, char buf)
	262	{
	263	struct lm3533 *lm3533 = dev_get_drvdata(dev);
	264	struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
	265	int id = lattr->u.output.id;
	266	u8 reg;
	267	u8 val;
	268	u8 mask;
	269	int shift;
	270	int ret;
	271
	272	if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT) {
	273	reg = LM3533_REG_OUTPUT_CONF1;
	274	shift = id - 1;
	275	mask = LM3533_BL_ID_MASK << shift;
	276	} else {
	277	if (id < 4) {
	278	reg = LM3533_REG_OUTPUT_CONF1;
	279	shift = 2 * id;
	280	} else {
	281	reg = LM3533_REG_OUTPUT_CONF2;
	282	shift = 2 * (id - 4);
	283	}
	284	mask = LM3533_LED_ID_MASK << shift;
	285	}
	286
	287	ret = lm3533_read(lm3533, reg, &val);
	288	if (ret)
	289	return ret;
	290
	291	val = (val & mask) >> shift;
	292
	293	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
	294	}
	295
	296	static ssize_t store_output(struct device *dev,
	297	struct device_attribute *attr,
	298	const char *buf, size_t len)
	299	{
	300	struct lm3533 *lm3533 = dev_get_drvdata(dev);
	301	struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
	302	int id = lattr->u.output.id;
	303	u8 val;
	304	int ret;
	305
	306	if (kstrtou8(buf, 0, &val))
	307	return -EINVAL;
	308
	309	if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT)
	310	ret = lm3533_set_hvled_config(lm3533, id, val);
	311	else
	312	ret = lm3533_set_lvled_config(lm3533, id, val);
	313
	314	if (ret)
	315	return ret;
	316
	317	return len;
	318	}
	319
	320	#define LM3533_OUTPUT_ATTR(_name, _mode, _show, _store, _type, _id) \
	321	struct lm3533_device_attribute lm3533_dev_attr_##_name = \
	322	{ .dev_attr = __ATTR(_name, _mode, _show, _store), \
	323	.type = _type, \
324	.u.output = { .id = _id }, }
325
326	#define LM3533_OUTPUT_ATTR_RW(_name, _type, _id) \
327	LM3533_OUTPUT_ATTR(output_##_name, S_IRUGO \| S_IWUSR, \
328	show_output, store_output, _type, _id)
329
330	#define LM3533_OUTPUT_HVLED_ATTR_RW(_nr) \
331	LM3533_OUTPUT_ATTR_RW(hvled##_nr, LM3533_ATTR_TYPE_BACKLIGHT, _nr)
332	#define LM3533_OUTPUT_LVLED_ATTR_RW(_nr) \
333	LM3533_OUTPUT_ATTR_RW(lvled##_nr, LM3533_ATTR_TYPE_LED, _nr)
334	/*
335	* Output config:
336	*
337	* output_hvled<nr> 0-1
338	* output_lvled<nr> 0-3
339	*/
340	static LM3533_OUTPUT_HVLED_ATTR_RW(1);
341	static LM3533_OUTPUT_HVLED_ATTR_RW(2);
342	static LM3533_OUTPUT_LVLED_ATTR_RW(1);
343	static LM3533_OUTPUT_LVLED_ATTR_RW(2);
344	static LM3533_OUTPUT_LVLED_ATTR_RW(3);
345	static LM3533_OUTPUT_LVLED_ATTR_RW(4);
346	static LM3533_OUTPUT_LVLED_ATTR_RW(5);
347
348	static struct attribute *lm3533_attributes[] = {
16c5c023 JH	349	&lm3533_dev_attr_output_hvled1.dev_attr.attr,
	350	&lm3533_dev_attr_output_hvled2.dev_attr.attr,
	351	&lm3533_dev_attr_output_lvled1.dev_attr.attr,
	352	&lm3533_dev_attr_output_lvled2.dev_attr.attr,
	353	&lm3533_dev_attr_output_lvled3.dev_attr.attr,
	354	&lm3533_dev_attr_output_lvled4.dev_attr.attr,
	355	&lm3533_dev_attr_output_lvled5.dev_attr.attr,
	356	NULL,
	357	};
	358
	359	#define to_dev_attr(_attr) \
	360	container_of(_attr, struct device_attribute, attr)
	361
168755eb	362	static umode_t lm3533_attr_is_visible(struct kobject *kobj,
16c5c023 JH	363	struct attribute *attr, int n)
	364	{
	365	struct device *dev = container_of(kobj, struct device, kobj);
	366	struct lm3533 *lm3533 = dev_get_drvdata(dev);
	367	struct device_attribute *dattr = to_dev_attr(attr);
	368	struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(dattr);
	369	enum lm3533_attribute_type type = lattr->type;
60908855	370	umode_t mode = attr->mode;
16c5c023 JH	371
	372	if (!lm3533->have_backlights && type == LM3533_ATTR_TYPE_BACKLIGHT)
	373	mode = 0;
	374	else if (!lm3533->have_leds && type == LM3533_ATTR_TYPE_LED)
	375	mode = 0;
	376
	377	return mode;
	378	};
	379
	380	static struct attribute_group lm3533_attribute_group = {
	381	.is_visible = lm3533_attr_is_visible,
	382	.attrs = lm3533_attributes
	383	};
	384
f791be49	385	static int lm3533_device_als_init(struct lm3533 *lm3533)
16c5c023	386	{
334a41ce	387	struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
16c5c023 JH	388	int ret;
	389
	390	if (!pdata->als)
	391	return 0;
	392
	393	lm3533_als_devs[0].platform_data = pdata->als;
	394	lm3533_als_devs[0].pdata_size = sizeof(*pdata->als);
	395
0848c94f MB	396	ret = mfd_add_devices(lm3533->dev, 0, lm3533_als_devs, 1, NULL,
0848c94f MB	397	0, NULL);
16c5c023 JH	398	if (ret) {
	399	dev_err(lm3533->dev, "failed to add ALS device\n");
	400	return ret;
	401	}
	402
	403	lm3533->have_als = 1;
	404
	405	return 0;
	406	}
	407
f791be49	408	static int lm3533_device_bl_init(struct lm3533 *lm3533)
16c5c023	409	{
334a41ce	410	struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
16c5c023 JH	411	int i;
	412	int ret;
	413
	414	if (!pdata->backlights \|\| pdata->num_backlights == 0)
	415	return 0;
	416
	417	if (pdata->num_backlights > ARRAY_SIZE(lm3533_bl_devs))
	418	pdata->num_backlights = ARRAY_SIZE(lm3533_bl_devs);
	419
	420	for (i = 0; i < pdata->num_backlights; ++i) {
	421	lm3533_bl_devs[i].platform_data = &pdata->backlights[i];
	422	lm3533_bl_devs[i].pdata_size = sizeof(pdata->backlights[i]);
	423	}
	424
	425	ret = mfd_add_devices(lm3533->dev, 0, lm3533_bl_devs,
0848c94f	426	pdata->num_backlights, NULL, 0, NULL);
16c5c023 JH	427	if (ret) {
	428	dev_err(lm3533->dev, "failed to add backlight devices\n");
	429	return ret;
	430	}
	431
	432	lm3533->have_backlights = 1;
	433
	434	return 0;
	435	}
	436
f791be49	437	static int lm3533_device_led_init(struct lm3533 *lm3533)
16c5c023	438	{
334a41ce	439	struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
16c5c023 JH	440	int i;
	441	int ret;
	442
	443	if (!pdata->leds \|\| pdata->num_leds == 0)
	444	return 0;
	445
	446	if (pdata->num_leds > ARRAY_SIZE(lm3533_led_devs))
	447	pdata->num_leds = ARRAY_SIZE(lm3533_led_devs);
	448
	449	for (i = 0; i < pdata->num_leds; ++i) {
	450	lm3533_led_devs[i].platform_data = &pdata->leds[i];
	451	lm3533_led_devs[i].pdata_size = sizeof(pdata->leds[i]);
	452	}
	453
	454	ret = mfd_add_devices(lm3533->dev, 0, lm3533_led_devs,
0848c94f	455	pdata->num_leds, NULL, 0, NULL);
16c5c023 JH	456	if (ret) {
	457	dev_err(lm3533->dev, "failed to add LED devices\n");
	458	return ret;
	459	}
	460
	461	lm3533->have_leds = 1;
	462
	463	return 0;
	464	}
	465
f791be49	466	static int lm3533_device_setup(struct lm3533 *lm3533,
d9055dc5 JH	467	struct lm3533_platform_data *pdata)
	468	{
	469	int ret;
	470
	471	ret = lm3533_set_boost_freq(lm3533, pdata->boost_freq);
	472	if (ret)
	473	return ret;
	474
a1c16d71	475	return lm3533_set_boost_ovp(lm3533, pdata->boost_ovp);
d9055dc5 JH	476	}
d9055dc5 JH	477
f791be49	478	static int lm3533_device_init(struct lm3533 *lm3533)
16c5c023	479	{
334a41ce	480	struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
16c5c023 JH	481	int ret;
	482
	483	dev_dbg(lm3533->dev, "%s\n", __func__);
	484
	485	if (!pdata) {
	486	dev_err(lm3533->dev, "no platform data\n");
	487	return -EINVAL;
	488	}
	489
	490	lm3533->gpio_hwen = pdata->gpio_hwen;
	491
	492	dev_set_drvdata(lm3533->dev, lm3533);
	493
	494	if (gpio_is_valid(lm3533->gpio_hwen)) {
bf5ea28a JH	495	ret = devm_gpio_request_one(lm3533->dev, lm3533->gpio_hwen,
bf5ea28a JH	496	GPIOF_OUT_INIT_LOW, "lm3533-hwen");
16c5c023 JH	497	if (ret < 0) {
	498	dev_err(lm3533->dev,
	499	"failed to request HWEN GPIO %d\n",
	500	lm3533->gpio_hwen);
	501	return ret;
	502	}
	503	}
	504
	505	lm3533_enable(lm3533);
	506
d9055dc5 JH	507	ret = lm3533_device_setup(lm3533, pdata);
	508	if (ret)
	509	goto err_disable;
	510
16c5c023 JH	511	lm3533_device_als_init(lm3533);
	512	lm3533_device_bl_init(lm3533);
	513	lm3533_device_led_init(lm3533);
	514
	515	ret = sysfs_create_group(&lm3533->dev->kobj, &lm3533_attribute_group);
	516	if (ret < 0) {
	517	dev_err(lm3533->dev, "failed to create sysfs attributes\n");
	518	goto err_unregister;
	519	}
	520
	521	return 0;
	522
	523	err_unregister:
	524	mfd_remove_devices(lm3533->dev);
d9055dc5	525	err_disable:
16c5c023	526	lm3533_disable(lm3533);
16c5c023 JH	527
	528	return ret;
	529	}
	530
4740f73f	531	static void lm3533_device_exit(struct lm3533 *lm3533)
16c5c023 JH	532	{
	533	dev_dbg(lm3533->dev, "%s\n", __func__);
	534
	535	sysfs_remove_group(&lm3533->dev->kobj, &lm3533_attribute_group);
	536
	537	mfd_remove_devices(lm3533->dev);
	538	lm3533_disable(lm3533);
16c5c023 JH	539	}
	540
	541	static bool lm3533_readable_register(struct device *dev, unsigned int reg)
	542	{
	543	switch (reg) {
	544	case 0x10 ... 0x2c:
	545	case 0x30 ... 0x38:
	546	case 0x40 ... 0x45:
	547	case 0x50 ... 0x57:
	548	case 0x60 ... 0x6e:
	549	case 0x70 ... 0x75:
	550	case 0x80 ... 0x85:
	551	case 0x90 ... 0x95:
	552	case 0xa0 ... 0xa5:
	553	case 0xb0 ... 0xb2:
	554	return true;
	555	default:
	556	return false;
	557	}
	558	}
	559
	560	static bool lm3533_volatile_register(struct device *dev, unsigned int reg)
	561	{
	562	switch (reg) {
c48bf153	563	case 0x34 ... 0x36: /* zone */
16c5c023 JH	564	case 0x37 ... 0x38: /* adc */
	565	case 0xb0 ... 0xb1: /* fault */
	566	return true;
	567	default:
	568	return false;
	569	}
	570	}
	571
	572	static bool lm3533_precious_register(struct device *dev, unsigned int reg)
	573	{
	574	switch (reg) {
	575	case 0x34: /* zone */
	576	return true;
	577	default:
	578	return false;
	579	}
	580	}
	581
dd635161	582	static const struct regmap_config regmap_config = {
16c5c023 JH	583	.reg_bits = 8,
	584	.val_bits = 8,
	585	.max_register = LM3533_REG_MAX,
	586	.readable_reg = lm3533_readable_register,
	587	.volatile_reg = lm3533_volatile_register,
	588	.precious_reg = lm3533_precious_register,
	589	};
	590
f791be49	591	static int lm3533_i2c_probe(struct i2c_client *i2c,
16c5c023 JH	592	const struct i2c_device_id *id)
	593	{
	594	struct lm3533 *lm3533;
16c5c023 JH	595
	596	dev_dbg(&i2c->dev, "%s\n", __func__);
	597
fa648e51	598	lm3533 = devm_kzalloc(&i2c->dev, sizeof(*lm3533), GFP_KERNEL);
16c5c023 JH	599	if (!lm3533)
	600	return -ENOMEM;
	601
	602	i2c_set_clientdata(i2c, lm3533);
	603
fa648e51 JH	604	lm3533->regmap = devm_regmap_init_i2c(i2c, &regmap_config);
	605	if (IS_ERR(lm3533->regmap))
	606	return PTR_ERR(lm3533->regmap);
16c5c023 JH	607
	608	lm3533->dev = &i2c->dev;
	609	lm3533->irq = i2c->irq;
	610
a1c16d71	611	return lm3533_device_init(lm3533);
16c5c023 JH	612	}
16c5c023 JH	613
4740f73f	614	static int lm3533_i2c_remove(struct i2c_client *i2c)
16c5c023 JH	615	{
	616	struct lm3533 *lm3533 = i2c_get_clientdata(i2c);
	617
	618	dev_dbg(&i2c->dev, "%s\n", __func__);
	619
	620	lm3533_device_exit(lm3533);
16c5c023 JH	621
	622	return 0;
	623	}
	624
	625	static const struct i2c_device_id lm3533_i2c_ids[] = {
	626	{ "lm3533", 0 },
	627	{ },
	628	};
	629	MODULE_DEVICE_TABLE(i2c, lm3533_i2c_ids);
	630
	631	static struct i2c_driver lm3533_i2c_driver = {
	632	.driver = {
	633	.name = "lm3533",
16c5c023 JH	634	},
	635	.id_table = lm3533_i2c_ids,
	636	.probe = lm3533_i2c_probe,
84449216	637	.remove = lm3533_i2c_remove,
16c5c023 JH	638	};
	639
	640	static int __init lm3533_i2c_init(void)
	641	{
	642	return i2c_add_driver(&lm3533_i2c_driver);
	643	}
	644	subsys_initcall(lm3533_i2c_init);
	645
	646	static void __exit lm3533_i2c_exit(void)
	647	{
	648	i2c_del_driver(&lm3533_i2c_driver);
	649	}
	650	module_exit(lm3533_i2c_exit);
	651
	652	MODULE_AUTHOR("Johan Hovold <[email protected]>");
	653	MODULE_DESCRIPTION("LM3533 Core");
	654	MODULE_LICENSE("GPL");