[deliverable/linux.git] / drivers / mfd / max14577.c

/*
 * max14577.c - mfd core driver for the Maxim 14577/77836
 *
 * Copyright (C) 2014 Samsung Electrnoics
 * Chanwoo Choi <cw00.choi@samsung.com>
 * Krzysztof Kozlowski <k.kozlowski@samsung.com>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * This driver is based on max8997.c
 */

#include <linux/err.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/of_device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max14577.h>
#include <linux/mfd/max14577-private.h>

static const struct mfd_cell max14577_devs[] = {
	{
		.name = "max14577-muic",
		.of_compatible = "maxim,max14577-muic",
	},
	{
		.name = "max14577-regulator",
		.of_compatible = "maxim,max14577-regulator",
	},
	{ .name = "max14577-charger", },
};

static const struct mfd_cell max77836_devs[] = {
	{
		.name = "max77836-muic",
		.of_compatible = "maxim,max77836-muic",
	},
	{
		.name = "max77836-regulator",
		.of_compatible = "maxim,max77836-regulator",
	},
	{
		.name = "max77836-charger",
		.of_compatible = "maxim,max77836-charger",
	},
	{
		.name = "max77836-battery",
		.of_compatible = "maxim,max77836-battery",
	},
};

static const struct of_device_id max14577_dt_match[] = {
	{
		.compatible = "maxim,max14577",
		.data = (void *)MAXIM_DEVICE_TYPE_MAX14577,
	},
	{
		.compatible = "maxim,max77836",
		.data = (void *)MAXIM_DEVICE_TYPE_MAX77836,
	},
	{},
};

static bool max14577_muic_volatile_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case MAX14577_REG_INT1 ... MAX14577_REG_STATUS3:
		return true;
	default:
		break;
	}
	return false;
}

static bool max77836_muic_volatile_reg(struct device *dev, unsigned int reg)
{
	/* Any max14577 volatile registers are also max77836 volatile. */
	if (max14577_muic_volatile_reg(dev, reg))
		return true;

	switch (reg) {
	case MAX77836_FG_REG_VCELL_MSB ... MAX77836_FG_REG_SOC_LSB:
	case MAX77836_FG_REG_CRATE_MSB ... MAX77836_FG_REG_CRATE_LSB:
	case MAX77836_FG_REG_STATUS_H ... MAX77836_FG_REG_STATUS_L:
	case MAX77836_PMIC_REG_INTSRC:
	case MAX77836_PMIC_REG_TOPSYS_INT:
	case MAX77836_PMIC_REG_TOPSYS_STAT:
		return true;
	default:
		break;
	}
	return false;
}

static const struct regmap_config max14577_muic_regmap_config = {
	.reg_bits	= 8,
	.val_bits	= 8,
	.volatile_reg	= max14577_muic_volatile_reg,
	.max_register	= MAX14577_REG_END,
};

static const struct regmap_config max77836_pmic_regmap_config = {
	.reg_bits	= 8,
	.val_bits	= 8,
	.volatile_reg	= max77836_muic_volatile_reg,
	.max_register	= MAX77836_PMIC_REG_END,
};

static const struct regmap_irq max14577_irqs[] = {
	/* INT1 interrupts */
	{ .reg_offset = 0, .mask = MAX14577_INT1_ADC_MASK, },
	{ .reg_offset = 0, .mask = MAX14577_INT1_ADCLOW_MASK, },
	{ .reg_offset = 0, .mask = MAX14577_INT1_ADCERR_MASK, },
	/* INT2 interrupts */
	{ .reg_offset = 1, .mask = MAX14577_INT2_CHGTYP_MASK, },
	{ .reg_offset = 1, .mask = MAX14577_INT2_CHGDETRUN_MASK, },
	{ .reg_offset = 1, .mask = MAX14577_INT2_DCDTMR_MASK, },
	{ .reg_offset = 1, .mask = MAX14577_INT2_DBCHG_MASK, },
	{ .reg_offset = 1, .mask = MAX14577_INT2_VBVOLT_MASK, },
	/* INT3 interrupts */
	{ .reg_offset = 2, .mask = MAX14577_INT3_EOC_MASK, },
	{ .reg_offset = 2, .mask = MAX14577_INT3_CGMBC_MASK, },
	{ .reg_offset = 2, .mask = MAX14577_INT3_OVP_MASK, },
	{ .reg_offset = 2, .mask = MAX14577_INT3_MBCCHGERR_MASK, },
};

static const struct regmap_irq_chip max14577_irq_chip = {
	.name			= "max14577",
	.status_base		= MAX14577_REG_INT1,
	.mask_base		= MAX14577_REG_INTMASK1,
	.mask_invert		= true,
	.num_regs		= 3,
	.irqs			= max14577_irqs,
	.num_irqs		= ARRAY_SIZE(max14577_irqs),
};

static const struct regmap_irq max77836_muic_irqs[] = {
	/* INT1 interrupts */
	{ .reg_offset = 0, .mask = MAX14577_INT1_ADC_MASK, },
	{ .reg_offset = 0, .mask = MAX14577_INT1_ADCLOW_MASK, },
	{ .reg_offset = 0, .mask = MAX14577_INT1_ADCERR_MASK, },
	{ .reg_offset = 0, .mask = MAX77836_INT1_ADC1K_MASK, },
	/* INT2 interrupts */
	{ .reg_offset = 1, .mask = MAX14577_INT2_CHGTYP_MASK, },
	{ .reg_offset = 1, .mask = MAX14577_INT2_CHGDETRUN_MASK, },
	{ .reg_offset = 1, .mask = MAX14577_INT2_DCDTMR_MASK, },
	{ .reg_offset = 1, .mask = MAX14577_INT2_DBCHG_MASK, },
	{ .reg_offset = 1, .mask = MAX14577_INT2_VBVOLT_MASK, },
	{ .reg_offset = 1, .mask = MAX77836_INT2_VIDRM_MASK, },
	/* INT3 interrupts */
	{ .reg_offset = 2, .mask = MAX14577_INT3_EOC_MASK, },
	{ .reg_offset = 2, .mask = MAX14577_INT3_CGMBC_MASK, },
	{ .reg_offset = 2, .mask = MAX14577_INT3_OVP_MASK, },
	{ .reg_offset = 2, .mask = MAX14577_INT3_MBCCHGERR_MASK, },
};

static const struct regmap_irq_chip max77836_muic_irq_chip = {
	.name			= "max77836-muic",
	.status_base		= MAX14577_REG_INT1,
	.mask_base		= MAX14577_REG_INTMASK1,
	.mask_invert		= true,
	.num_regs		= 3,
	.irqs			= max77836_muic_irqs,
	.num_irqs		= ARRAY_SIZE(max77836_muic_irqs),
};

static const struct regmap_irq max77836_pmic_irqs[] = {
	{ .reg_offset = 0, .mask = MAX77836_TOPSYS_INT_T120C_MASK, },
	{ .reg_offset = 0, .mask = MAX77836_TOPSYS_INT_T140C_MASK, },
};

static const struct regmap_irq_chip max77836_pmic_irq_chip = {
	.name			= "max77836-pmic",
	.status_base		= MAX77836_PMIC_REG_TOPSYS_INT,
	.mask_base		= MAX77836_PMIC_REG_TOPSYS_INT_MASK,
	.mask_invert		= false,
	.num_regs		= 1,
	.irqs			= max77836_pmic_irqs,
	.num_irqs		= ARRAY_SIZE(max77836_pmic_irqs),
};

static void max14577_print_dev_type(struct max14577 *max14577)
{
	u8 reg_data, vendor_id, device_id;
	int ret;

	ret = max14577_read_reg(max14577->regmap, MAX14577_REG_DEVICEID,
			&reg_data);
	if (ret) {
		dev_err(max14577->dev,
			"Failed to read DEVICEID register: %d\n", ret);
		return;
	}

	vendor_id = ((reg_data & DEVID_VENDORID_MASK) >>
				DEVID_VENDORID_SHIFT);
	device_id = ((reg_data & DEVID_DEVICEID_MASK) >>
				DEVID_DEVICEID_SHIFT);

	dev_info(max14577->dev, "Device type: %u (ID: 0x%x, vendor: 0x%x)\n",
			max14577->dev_type, device_id, vendor_id);
}

/*
 * Max77836 specific initialization code for driver probe.
 * Adds new I2C dummy device, regmap and regmap IRQ chip.
 * Unmasks Interrupt Source register.
 *
 * On success returns 0.
 * On failure returns errno and reverts any changes done so far (e.g. remove
 * I2C dummy device), except masking the INT SRC register.
 */
static int max77836_init(struct max14577 *max14577)
{
	int ret;
	u8 intsrc_mask;

	max14577->i2c_pmic = i2c_new_dummy(max14577->i2c->adapter,
			I2C_ADDR_PMIC);
	if (!max14577->i2c_pmic) {
		dev_err(max14577->dev, "Failed to register PMIC I2C device\n");
		return -ENODEV;
	}
	i2c_set_clientdata(max14577->i2c_pmic, max14577);

	max14577->regmap_pmic = devm_regmap_init_i2c(max14577->i2c_pmic,
			&max77836_pmic_regmap_config);
	if (IS_ERR(max14577->regmap_pmic)) {
		ret = PTR_ERR(max14577->regmap_pmic);
		dev_err(max14577->dev, "Failed to allocate PMIC register map: %d\n",
				ret);
		goto err;
	}

	/* Un-mask MAX77836 Interrupt Source register */
	ret = max14577_read_reg(max14577->regmap_pmic,
			MAX77836_PMIC_REG_INTSRC_MASK, &intsrc_mask);
	if (ret < 0) {
		dev_err(max14577->dev, "Failed to read PMIC register\n");
		goto err;
	}

	intsrc_mask &= ~(MAX77836_INTSRC_MASK_TOP_INT_MASK);
	intsrc_mask &= ~(MAX77836_INTSRC_MASK_MUIC_CHG_INT_MASK);
	ret = max14577_write_reg(max14577->regmap_pmic,
			MAX77836_PMIC_REG_INTSRC_MASK, intsrc_mask);
	if (ret < 0) {
		dev_err(max14577->dev, "Failed to write PMIC register\n");
		goto err;
	}

	ret = regmap_add_irq_chip(max14577->regmap_pmic, max14577->irq,
			IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED,
			0, &max77836_pmic_irq_chip,
			&max14577->irq_data_pmic);
	if (ret != 0) {
		dev_err(max14577->dev, "Failed to request PMIC IRQ %d: %d\n",
				max14577->irq, ret);
		goto err;
	}

	return 0;

err:
	i2c_unregister_device(max14577->i2c_pmic);

	return ret;
}

/*
 * Max77836 specific de-initialization code for driver remove.
 */
static void max77836_remove(struct max14577 *max14577)
{
	regmap_del_irq_chip(max14577->irq, max14577->irq_data_pmic);
	i2c_unregister_device(max14577->i2c_pmic);
}

static int max14577_i2c_probe(struct i2c_client *i2c,
			      const struct i2c_device_id *id)
{
	struct max14577 *max14577;
	struct max14577_platform_data *pdata = dev_get_platdata(&i2c->dev);
	struct device_node *np = i2c->dev.of_node;
	int ret = 0;
	const struct regmap_irq_chip *irq_chip;
	const struct mfd_cell *mfd_devs;
	unsigned int mfd_devs_size;
	int irq_flags;

	if (np) {
		pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
		if (!pdata)
			return -ENOMEM;
		i2c->dev.platform_data = pdata;
	}

	if (!pdata) {
		dev_err(&i2c->dev, "No platform data found.\n");
		return -EINVAL;
	}

	max14577 = devm_kzalloc(&i2c->dev, sizeof(*max14577), GFP_KERNEL);
	if (!max14577)
		return -ENOMEM;

	i2c_set_clientdata(i2c, max14577);
	max14577->dev = &i2c->dev;
	max14577->i2c = i2c;
	max14577->irq = i2c->irq;

	max14577->regmap = devm_regmap_init_i2c(i2c,
			&max14577_muic_regmap_config);
	if (IS_ERR(max14577->regmap)) {
		ret = PTR_ERR(max14577->regmap);
		dev_err(max14577->dev, "Failed to allocate register map: %d\n",
				ret);
		return ret;
	}

	if (np) {
		const struct of_device_id *of_id;

		of_id = of_match_device(max14577_dt_match, &i2c->dev);
		if (of_id)
			max14577->dev_type =
				(enum maxim_device_type)of_id->data;
	} else {
		max14577->dev_type = id->driver_data;
	}

	max14577_print_dev_type(max14577);

	switch (max14577->dev_type) {
	case MAXIM_DEVICE_TYPE_MAX77836:
		irq_chip = &max77836_muic_irq_chip;
		mfd_devs = max77836_devs;
		mfd_devs_size = ARRAY_SIZE(max77836_devs);
		irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
		break;
	case MAXIM_DEVICE_TYPE_MAX14577:
	default:
		irq_chip = &max14577_irq_chip;
		mfd_devs = max14577_devs;
		mfd_devs_size = ARRAY_SIZE(max14577_devs);
		irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
		break;
	}

	ret = regmap_add_irq_chip(max14577->regmap, max14577->irq,
				  irq_flags, 0, irq_chip,
				  &max14577->irq_data);
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
				max14577->irq, ret);
		return ret;
	}

	/* Max77836 specific initialization code (additional regmap) */
	if (max14577->dev_type == MAXIM_DEVICE_TYPE_MAX77836) {
		ret = max77836_init(max14577);
		if (ret < 0)
			goto err_max77836;
	}

	ret = mfd_add_devices(max14577->dev, -1, mfd_devs,
			mfd_devs_size, NULL, 0,
			regmap_irq_get_domain(max14577->irq_data));
	if (ret < 0)
		goto err_mfd;

	device_init_wakeup(max14577->dev, 1);

	return 0;

err_mfd:
	if (max14577->dev_type == MAXIM_DEVICE_TYPE_MAX77836)
		max77836_remove(max14577);
err_max77836:
	regmap_del_irq_chip(max14577->irq, max14577->irq_data);

	return ret;
}

static int max14577_i2c_remove(struct i2c_client *i2c)
{
	struct max14577 *max14577 = i2c_get_clientdata(i2c);

	mfd_remove_devices(max14577->dev);
	regmap_del_irq_chip(max14577->irq, max14577->irq_data);
	if (max14577->dev_type == MAXIM_DEVICE_TYPE_MAX77836)
		max77836_remove(max14577);

	return 0;
}

static const struct i2c_device_id max14577_i2c_id[] = {
	{ "max14577", MAXIM_DEVICE_TYPE_MAX14577, },
	{ "max77836", MAXIM_DEVICE_TYPE_MAX77836, },
	{ }
};
MODULE_DEVICE_TABLE(i2c, max14577_i2c_id);

#ifdef CONFIG_PM_SLEEP
static int max14577_suspend(struct device *dev)
{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct max14577 *max14577 = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev))
		enable_irq_wake(max14577->irq);
	/*
	 * MUIC IRQ must be disabled during suspend because if it happens
	 * while suspended it will be handled before resuming I2C.
	 *
	 * When device is woken up from suspend (e.g. by ADC change),
	 * an interrupt occurs before resuming I2C bus controller.
	 * Interrupt handler tries to read registers but this read
	 * will fail because I2C is still suspended.
	 */
	disable_irq(max14577->irq);

	return 0;
}

static int max14577_resume(struct device *dev)
{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct max14577 *max14577 = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev))
		disable_irq_wake(max14577->irq);
	enable_irq(max14577->irq);

	return 0;
}
#endif /* CONFIG_PM_SLEEP */

static SIMPLE_DEV_PM_OPS(max14577_pm, max14577_suspend, max14577_resume);

static struct i2c_driver max14577_i2c_driver = {
	.driver = {
		.name = "max14577",
		.owner = THIS_MODULE,
		.pm = &max14577_pm,
		.of_match_table = max14577_dt_match,
	},
	.probe = max14577_i2c_probe,
	.remove = max14577_i2c_remove,
	.id_table = max14577_i2c_id,
};

static int __init max14577_i2c_init(void)
{
	BUILD_BUG_ON(ARRAY_SIZE(max14577_i2c_id) != MAXIM_DEVICE_TYPE_NUM);
	BUILD_BUG_ON(ARRAY_SIZE(max14577_dt_match) != MAXIM_DEVICE_TYPE_NUM);

	return i2c_add_driver(&max14577_i2c_driver);
}
subsys_initcall(max14577_i2c_init);

static void __exit max14577_i2c_exit(void)
{
	i2c_del_driver(&max14577_i2c_driver);
}
module_exit(max14577_i2c_exit);

MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <k.kozlowski@samsung.com>");
MODULE_DESCRIPTION("Maxim 14577/77836 multi-function core driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
3008ddbe	1	/*
aee2a57c	2	* max14577.c - mfd core driver for the Maxim 14577/77836
3008ddbe	3	*
aee2a57c	4	* Copyright (C) 2014 Samsung Electrnoics
3008ddbe CC	5	* Chanwoo Choi <cw00.choi@samsung.com>
	6	* Krzysztof Kozlowski <k.kozlowski@samsung.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* This driver is based on max8997.c
	19	*/
	20
c8016d45	21	#include <linux/err.h>
3008ddbe CC	22	#include <linux/module.h>
3008ddbe CC	23	#include <linux/interrupt.h>
eccb80cc	24	#include <linux/of_device.h>
3008ddbe CC	25	#include <linux/mfd/core.h>
	26	#include <linux/mfd/max14577.h>
	27	#include <linux/mfd/max14577-private.h>
	28
92725493	29	static const struct mfd_cell max14577_devs[] = {
a0b0ea49 KK	30	{
	31	.name = "max14577-muic",
	32	.of_compatible = "maxim,max14577-muic",
	33	},
41096801 KK	34	{
	35	.name = "max14577-regulator",
	36	.of_compatible = "maxim,max14577-regulator",
	37	},
3008ddbe CC	38	{ .name = "max14577-charger", },
	39	};
	40
92725493	41	static const struct mfd_cell max77836_devs[] = {
aee2a57c KK	42	{
	43	.name = "max77836-muic",
	44	.of_compatible = "maxim,max77836-muic",
	45	},
	46	{
	47	.name = "max77836-regulator",
	48	.of_compatible = "maxim,max77836-regulator",
	49	},
	50	{
	51	.name = "max77836-charger",
	52	.of_compatible = "maxim,max77836-charger",
	53	},
	54	{
	55	.name = "max77836-battery",
	56	.of_compatible = "maxim,max77836-battery",
	57	},
	58	};
	59
8f7f6270	60	static const struct of_device_id max14577_dt_match[] = {
eccb80cc KK	61	{
	62	.compatible = "maxim,max14577",
	63	.data = (void *)MAXIM_DEVICE_TYPE_MAX14577,
	64	},
aee2a57c KK	65	{
	66	.compatible = "maxim,max77836",
	67	.data = (void *)MAXIM_DEVICE_TYPE_MAX77836,
	68	},
eccb80cc KK	69	{},
	70	};
	71
575343d1	72	static bool max14577_muic_volatile_reg(struct device *dev, unsigned int reg)
3008ddbe CC	73	{
	74	switch (reg) {
	75	case MAX14577_REG_INT1 ... MAX14577_REG_STATUS3:
	76	return true;
	77	default:
	78	break;
	79	}
	80	return false;
	81	}
	82
aee2a57c KK	83	static bool max77836_muic_volatile_reg(struct device *dev, unsigned int reg)
	84	{
	85	/* Any max14577 volatile registers are also max77836 volatile. */
	86	if (max14577_muic_volatile_reg(dev, reg))
	87	return true;
	88
	89	switch (reg) {
	90	case MAX77836_FG_REG_VCELL_MSB ... MAX77836_FG_REG_SOC_LSB:
	91	case MAX77836_FG_REG_CRATE_MSB ... MAX77836_FG_REG_CRATE_LSB:
	92	case MAX77836_FG_REG_STATUS_H ... MAX77836_FG_REG_STATUS_L:
	93	case MAX77836_PMIC_REG_INTSRC:
	94	case MAX77836_PMIC_REG_TOPSYS_INT:
	95	case MAX77836_PMIC_REG_TOPSYS_STAT:
	96	return true;
	97	default:
	98	break;
	99	}
	100	return false;
	101	}
	102
575343d1	103	static const struct regmap_config max14577_muic_regmap_config = {
3008ddbe CC	104	.reg_bits = 8,
3008ddbe CC	105	.val_bits = 8,
575343d1	106	.volatile_reg = max14577_muic_volatile_reg,
3008ddbe CC	107	.max_register = MAX14577_REG_END,
	108	};
	109
aee2a57c KK	110	static const struct regmap_config max77836_pmic_regmap_config = {
	111	.reg_bits = 8,
	112	.val_bits = 8,
	113	.volatile_reg = max77836_muic_volatile_reg,
	114	.max_register = MAX77836_PMIC_REG_END,
	115	};
	116
3008ddbe CC	117	static const struct regmap_irq max14577_irqs[] = {
3008ddbe CC	118	/* INT1 interrupts */
c7846852 KK	119	{ .reg_offset = 0, .mask = MAX14577_INT1_ADC_MASK, },
	120	{ .reg_offset = 0, .mask = MAX14577_INT1_ADCLOW_MASK, },
	121	{ .reg_offset = 0, .mask = MAX14577_INT1_ADCERR_MASK, },
3008ddbe	122	/* INT2 interrupts */
c7846852 KK	123	{ .reg_offset = 1, .mask = MAX14577_INT2_CHGTYP_MASK, },
	124	{ .reg_offset = 1, .mask = MAX14577_INT2_CHGDETRUN_MASK, },
	125	{ .reg_offset = 1, .mask = MAX14577_INT2_DCDTMR_MASK, },
	126	{ .reg_offset = 1, .mask = MAX14577_INT2_DBCHG_MASK, },
	127	{ .reg_offset = 1, .mask = MAX14577_INT2_VBVOLT_MASK, },
3008ddbe	128	/* INT3 interrupts */
c7846852 KK	129	{ .reg_offset = 2, .mask = MAX14577_INT3_EOC_MASK, },
	130	{ .reg_offset = 2, .mask = MAX14577_INT3_CGMBC_MASK, },
	131	{ .reg_offset = 2, .mask = MAX14577_INT3_OVP_MASK, },
	132	{ .reg_offset = 2, .mask = MAX14577_INT3_MBCCHGERR_MASK, },
3008ddbe CC	133	};
	134
	135	static const struct regmap_irq_chip max14577_irq_chip = {
	136	.name = "max14577",
	137	.status_base = MAX14577_REG_INT1,
	138	.mask_base = MAX14577_REG_INTMASK1,
aee2a57c	139	.mask_invert = true,
3008ddbe CC	140	.num_regs = 3,
	141	.irqs = max14577_irqs,
	142	.num_irqs = ARRAY_SIZE(max14577_irqs),
	143	};
	144
aee2a57c KK	145	static const struct regmap_irq max77836_muic_irqs[] = {
	146	/* INT1 interrupts */
	147	{ .reg_offset = 0, .mask = MAX14577_INT1_ADC_MASK, },
	148	{ .reg_offset = 0, .mask = MAX14577_INT1_ADCLOW_MASK, },
	149	{ .reg_offset = 0, .mask = MAX14577_INT1_ADCERR_MASK, },
4706a525	150	{ .reg_offset = 0, .mask = MAX77836_INT1_ADC1K_MASK, },
aee2a57c KK	151	/* INT2 interrupts */
	152	{ .reg_offset = 1, .mask = MAX14577_INT2_CHGTYP_MASK, },
	153	{ .reg_offset = 1, .mask = MAX14577_INT2_CHGDETRUN_MASK, },
	154	{ .reg_offset = 1, .mask = MAX14577_INT2_DCDTMR_MASK, },
	155	{ .reg_offset = 1, .mask = MAX14577_INT2_DBCHG_MASK, },
	156	{ .reg_offset = 1, .mask = MAX14577_INT2_VBVOLT_MASK, },
	157	{ .reg_offset = 1, .mask = MAX77836_INT2_VIDRM_MASK, },
	158	/* INT3 interrupts */
	159	{ .reg_offset = 2, .mask = MAX14577_INT3_EOC_MASK, },
	160	{ .reg_offset = 2, .mask = MAX14577_INT3_CGMBC_MASK, },
	161	{ .reg_offset = 2, .mask = MAX14577_INT3_OVP_MASK, },
	162	{ .reg_offset = 2, .mask = MAX14577_INT3_MBCCHGERR_MASK, },
	163	};
	164
	165	static const struct regmap_irq_chip max77836_muic_irq_chip = {
	166	.name = "max77836-muic",
	167	.status_base = MAX14577_REG_INT1,
	168	.mask_base = MAX14577_REG_INTMASK1,
	169	.mask_invert = true,
	170	.num_regs = 3,
	171	.irqs = max77836_muic_irqs,
	172	.num_irqs = ARRAY_SIZE(max77836_muic_irqs),
	173	};
	174
	175	static const struct regmap_irq max77836_pmic_irqs[] = {
	176	{ .reg_offset = 0, .mask = MAX77836_TOPSYS_INT_T120C_MASK, },
	177	{ .reg_offset = 0, .mask = MAX77836_TOPSYS_INT_T140C_MASK, },
	178	};
	179
	180	static const struct regmap_irq_chip max77836_pmic_irq_chip = {
	181	.name = "max77836-pmic",
	182	.status_base = MAX77836_PMIC_REG_TOPSYS_INT,
	183	.mask_base = MAX77836_PMIC_REG_TOPSYS_INT_MASK,
	184	.mask_invert = false,
	185	.num_regs = 1,
	186	.irqs = max77836_pmic_irqs,
	187	.num_irqs = ARRAY_SIZE(max77836_pmic_irqs),
	188	};
	189
eccb80cc KK	190	static void max14577_print_dev_type(struct max14577 *max14577)
	191	{
	192	u8 reg_data, vendor_id, device_id;
	193	int ret;
	194
	195	ret = max14577_read_reg(max14577->regmap, MAX14577_REG_DEVICEID,
	196	&reg_data);
	197	if (ret) {
	198	dev_err(max14577->dev,
	199	"Failed to read DEVICEID register: %d\n", ret);
	200	return;
	201	}
	202
	203	vendor_id = ((reg_data & DEVID_VENDORID_MASK) >>
	204	DEVID_VENDORID_SHIFT);
	205	device_id = ((reg_data & DEVID_DEVICEID_MASK) >>
	206	DEVID_DEVICEID_SHIFT);
	207
	208	dev_info(max14577->dev, "Device type: %u (ID: 0x%x, vendor: 0x%x)\n",
	209	max14577->dev_type, device_id, vendor_id);
	210	}
	211
aee2a57c KK	212	/*
	213	* Max77836 specific initialization code for driver probe.
	214	* Adds new I2C dummy device, regmap and regmap IRQ chip.
	215	* Unmasks Interrupt Source register.
	216	*
	217	* On success returns 0.
	218	* On failure returns errno and reverts any changes done so far (e.g. remove
	219	* I2C dummy device), except masking the INT SRC register.
	220	*/
	221	static int max77836_init(struct max14577 *max14577)
	222	{
	223	int ret;
	224	u8 intsrc_mask;
	225
	226	max14577->i2c_pmic = i2c_new_dummy(max14577->i2c->adapter,
	227	I2C_ADDR_PMIC);
	228	if (!max14577->i2c_pmic) {
	229	dev_err(max14577->dev, "Failed to register PMIC I2C device\n");
	230	return -ENODEV;
	231	}
	232	i2c_set_clientdata(max14577->i2c_pmic, max14577);
	233
	234	max14577->regmap_pmic = devm_regmap_init_i2c(max14577->i2c_pmic,
	235	&max77836_pmic_regmap_config);
	236	if (IS_ERR(max14577->regmap_pmic)) {
	237	ret = PTR_ERR(max14577->regmap_pmic);
	238	dev_err(max14577->dev, "Failed to allocate PMIC register map: %d\n",
	239	ret);
	240	goto err;
	241	}
	242
	243	/* Un-mask MAX77836 Interrupt Source register */
	244	ret = max14577_read_reg(max14577->regmap_pmic,
	245	MAX77836_PMIC_REG_INTSRC_MASK, &intsrc_mask);
	246	if (ret < 0) {
	247	dev_err(max14577->dev, "Failed to read PMIC register\n");
	248	goto err;
	249	}
	250
	251	intsrc_mask &= ~(MAX77836_INTSRC_MASK_TOP_INT_MASK);
	252	intsrc_mask &= ~(MAX77836_INTSRC_MASK_MUIC_CHG_INT_MASK);
	253	ret = max14577_write_reg(max14577->regmap_pmic,
	254	MAX77836_PMIC_REG_INTSRC_MASK, intsrc_mask);
	255	if (ret < 0) {
	256	dev_err(max14577->dev, "Failed to write PMIC register\n");
	257	goto err;
	258	}
	259
	260	ret = regmap_add_irq_chip(max14577->regmap_pmic, max14577->irq,
	261	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT \| IRQF_SHARED,
	262	0, &max77836_pmic_irq_chip,
	263	&max14577->irq_data_pmic);
	264	if (ret != 0) {
	265	dev_err(max14577->dev, "Failed to request PMIC IRQ %d: %d\n",
	266	max14577->irq, ret);
	267	goto err;
	268	}
	269
	270	return 0;
	271
	272	err:
	273	i2c_unregister_device(max14577->i2c_pmic);
	274
	275	return ret;
276	}
277
278	/*
279	* Max77836 specific de-initialization code for driver remove.
280	*/
281	static void max77836_remove(struct max14577 *max14577)
282	{
283	regmap_del_irq_chip(max14577->irq, max14577->irq_data_pmic);
284	i2c_unregister_device(max14577->i2c_pmic);
285	}
286
3008ddbe CC	287	static int max14577_i2c_probe(struct i2c_client *i2c,
	288	const struct i2c_device_id *id)
	289	{
	290	struct max14577 *max14577;
	291	struct max14577_platform_data *pdata = dev_get_platdata(&i2c->dev);
	292	struct device_node *np = i2c->dev.of_node;
3008ddbe	293	int ret = 0;
aee2a57c	294	const struct regmap_irq_chip *irq_chip;
92725493	295	const struct mfd_cell *mfd_devs;
aee2a57c KK	296	unsigned int mfd_devs_size;
aee2a57c KK	297	int irq_flags;
3008ddbe CC	298
	299	if (np) {
	300	pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
	301	if (!pdata)
	302	return -ENOMEM;
	303	i2c->dev.platform_data = pdata;
	304	}
	305
	306	if (!pdata) {
aab5dc68	307	dev_err(&i2c->dev, "No platform data found.\n");
3008ddbe CC	308	return -EINVAL;
	309	}
	310
	311	max14577 = devm_kzalloc(&i2c->dev, sizeof(*max14577), GFP_KERNEL);
	312	if (!max14577)
	313	return -ENOMEM;
	314
	315	i2c_set_clientdata(i2c, max14577);
	316	max14577->dev = &i2c->dev;
	317	max14577->i2c = i2c;
	318	max14577->irq = i2c->irq;
	319
575343d1 KK	320	max14577->regmap = devm_regmap_init_i2c(i2c,
575343d1 KK	321	&max14577_muic_regmap_config);
3008ddbe CC	322	if (IS_ERR(max14577->regmap)) {
	323	ret = PTR_ERR(max14577->regmap);
	324	dev_err(max14577->dev, "Failed to allocate register map: %d\n",
	325	ret);
	326	return ret;
	327	}
	328
eccb80cc KK	329	if (np) {
	330	const struct of_device_id *of_id;
	331
	332	of_id = of_match_device(max14577_dt_match, &i2c->dev);
	333	if (of_id)
fab8445c LJ	334	max14577->dev_type =
fab8445c LJ	335	(enum maxim_device_type)of_id->data;
eccb80cc KK	336	} else {
eccb80cc KK	337	max14577->dev_type = id->driver_data;
3008ddbe	338	}
eccb80cc KK	339
eccb80cc KK	340	max14577_print_dev_type(max14577);
3008ddbe	341
aee2a57c KK	342	switch (max14577->dev_type) {
	343	case MAXIM_DEVICE_TYPE_MAX77836:
	344	irq_chip = &max77836_muic_irq_chip;
	345	mfd_devs = max77836_devs;
	346	mfd_devs_size = ARRAY_SIZE(max77836_devs);
	347	irq_flags = IRQF_TRIGGER_FALLING \| IRQF_ONESHOT \| IRQF_SHARED;
	348	break;
	349	case MAXIM_DEVICE_TYPE_MAX14577:
	350	default:
	351	irq_chip = &max14577_irq_chip;
	352	mfd_devs = max14577_devs;
	353	mfd_devs_size = ARRAY_SIZE(max14577_devs);
	354	irq_flags = IRQF_TRIGGER_FALLING \| IRQF_ONESHOT;
	355	break;
	356	}
	357
3008ddbe	358	ret = regmap_add_irq_chip(max14577->regmap, max14577->irq,
aee2a57c	359	irq_flags, 0, irq_chip,
3008ddbe CC	360	&max14577->irq_data);
	361	if (ret != 0) {
	362	dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
	363	max14577->irq, ret);
	364	return ret;
	365	}
	366
aee2a57c KK	367	/* Max77836 specific initialization code (additional regmap) */
	368	if (max14577->dev_type == MAXIM_DEVICE_TYPE_MAX77836) {
	369	ret = max77836_init(max14577);
	370	if (ret < 0)
	371	goto err_max77836;
	372	}
	373
	374	ret = mfd_add_devices(max14577->dev, -1, mfd_devs,
	375	mfd_devs_size, NULL, 0,
3008ddbe CC	376	regmap_irq_get_domain(max14577->irq_data));
	377	if (ret < 0)
	378	goto err_mfd;
	379
	380	device_init_wakeup(max14577->dev, 1);
	381
	382	return 0;
	383
	384	err_mfd:
aee2a57c KK	385	if (max14577->dev_type == MAXIM_DEVICE_TYPE_MAX77836)
	386	max77836_remove(max14577);
	387	err_max77836:
3008ddbe CC	388	regmap_del_irq_chip(max14577->irq, max14577->irq_data);
	389
	390	return ret;
	391	}
	392
	393	static int max14577_i2c_remove(struct i2c_client *i2c)
	394	{
	395	struct max14577 *max14577 = i2c_get_clientdata(i2c);
	396
	397	mfd_remove_devices(max14577->dev);
	398	regmap_del_irq_chip(max14577->irq, max14577->irq_data);
aee2a57c KK	399	if (max14577->dev_type == MAXIM_DEVICE_TYPE_MAX77836)
aee2a57c KK	400	max77836_remove(max14577);
3008ddbe CC	401
	402	return 0;
	403	}
	404
	405	static const struct i2c_device_id max14577_i2c_id[] = {
eccb80cc	406	{ "max14577", MAXIM_DEVICE_TYPE_MAX14577, },
aee2a57c	407	{ "max77836", MAXIM_DEVICE_TYPE_MAX77836, },
3008ddbe CC	408	{ }
	409	};
	410	MODULE_DEVICE_TABLE(i2c, max14577_i2c_id);
	411
3edeb1e4	412	#ifdef CONFIG_PM_SLEEP
3008ddbe CC	413	static int max14577_suspend(struct device *dev)
	414	{
	415	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	416	struct max14577 *max14577 = i2c_get_clientdata(i2c);
	417
c4f725b5	418	if (device_may_wakeup(dev))
3008ddbe	419	enable_irq_wake(max14577->irq);
c4f725b5 KK	420	/*
	421	* MUIC IRQ must be disabled during suspend because if it happens
	422	* while suspended it will be handled before resuming I2C.
	423	*
	424	* When device is woken up from suspend (e.g. by ADC change),
	425	* an interrupt occurs before resuming I2C bus controller.
	426	* Interrupt handler tries to read registers but this read
	427	* will fail because I2C is still suspended.
	428	*/
	429	disable_irq(max14577->irq);
3008ddbe CC	430
	431	return 0;
	432	}
	433
	434	static int max14577_resume(struct device *dev)
	435	{
	436	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	437	struct max14577 *max14577 = i2c_get_clientdata(i2c);
	438
c4f725b5	439	if (device_may_wakeup(dev))
3008ddbe	440	disable_irq_wake(max14577->irq);
c4f725b5	441	enable_irq(max14577->irq);
3008ddbe CC	442
	443	return 0;
	444	}
3edeb1e4	445	#endif /* CONFIG_PM_SLEEP */
3008ddbe	446
3008ddbe CC	447	static SIMPLE_DEV_PM_OPS(max14577_pm, max14577_suspend, max14577_resume);
	448
	449	static struct i2c_driver max14577_i2c_driver = {
	450	.driver = {
	451	.name = "max14577",
	452	.owner = THIS_MODULE,
	453	.pm = &max14577_pm,
ae679c12	454	.of_match_table = max14577_dt_match,
3008ddbe CC	455	},
	456	.probe = max14577_i2c_probe,
	457	.remove = max14577_i2c_remove,
	458	.id_table = max14577_i2c_id,
	459	};
	460
	461	static int __init max14577_i2c_init(void)
	462	{
eccb80cc KK	463	BUILD_BUG_ON(ARRAY_SIZE(max14577_i2c_id) != MAXIM_DEVICE_TYPE_NUM);
	464	BUILD_BUG_ON(ARRAY_SIZE(max14577_dt_match) != MAXIM_DEVICE_TYPE_NUM);
	465
3008ddbe CC	466	return i2c_add_driver(&max14577_i2c_driver);
	467	}
	468	subsys_initcall(max14577_i2c_init);
	469
	470	static void __exit max14577_i2c_exit(void)
	471	{
	472	i2c_del_driver(&max14577_i2c_driver);
	473	}
	474	module_exit(max14577_i2c_exit);
	475
	476	MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <k.kozlowski@samsung.com>");
aee2a57c	477	MODULE_DESCRIPTION("Maxim 14577/77836 multi-function core driver");
3008ddbe	478	MODULE_LICENSE("GPL");