[mirror_ubuntu-bionic-kernel.git] / drivers / mfd / tps6586x.c

/*
 * Core driver for TI TPS6586x PMIC family
 *
 * Copyright (c) 2010 CompuLab Ltd.
 * Mike Rapoport <mike@compulab.co.il>
 *
 * Based on da903x.c.
 * Copyright (C) 2008 Compulab, Ltd.
 * Mike Rapoport <mike@compulab.co.il>
 * Copyright (C) 2006-2008 Marvell International Ltd.
 * Eric Miao <eric.miao@marvell.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/of.h>

#include <linux/mfd/core.h>
#include <linux/mfd/tps6586x.h>

#define TPS6586X_SUPPLYENE	0x14
#define EXITSLREQ_BIT		BIT(1)
#define SLEEP_MODE_BIT		BIT(3)

/* interrupt control registers */
#define TPS6586X_INT_ACK1	0xb5
#define TPS6586X_INT_ACK2	0xb6
#define TPS6586X_INT_ACK3	0xb7
#define TPS6586X_INT_ACK4	0xb8

/* interrupt mask registers */
#define TPS6586X_INT_MASK1	0xb0
#define TPS6586X_INT_MASK2	0xb1
#define TPS6586X_INT_MASK3	0xb2
#define TPS6586X_INT_MASK4	0xb3
#define TPS6586X_INT_MASK5	0xb4

/* device id */
#define TPS6586X_VERSIONCRC	0xcd

/* Maximum register */
#define TPS6586X_MAX_REGISTER	TPS6586X_VERSIONCRC

struct tps6586x_irq_data {
	u8	mask_reg;
	u8	mask_mask;
};

#define TPS6586X_IRQ(_reg, _mask)				\
	{							\
		.mask_reg = (_reg) - TPS6586X_INT_MASK1,	\
		.mask_mask = (_mask),				\
	}

static const struct tps6586x_irq_data tps6586x_irqs[] = {
	[TPS6586X_INT_PLDO_0]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
	[TPS6586X_INT_PLDO_1]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
	[TPS6586X_INT_PLDO_2]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
	[TPS6586X_INT_PLDO_3]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
	[TPS6586X_INT_PLDO_4]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
	[TPS6586X_INT_PLDO_5]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
	[TPS6586X_INT_PLDO_6]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
	[TPS6586X_INT_PLDO_7]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
	[TPS6586X_INT_COMP_DET]	= TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
	[TPS6586X_INT_ADC]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
	[TPS6586X_INT_PLDO_8]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
	[TPS6586X_INT_PLDO_9]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
	[TPS6586X_INT_PSM_0]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
	[TPS6586X_INT_PSM_1]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
	[TPS6586X_INT_PSM_2]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
	[TPS6586X_INT_PSM_3]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
	[TPS6586X_INT_RTC_ALM1]	= TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
	[TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
	[TPS6586X_INT_USB_DET]	= TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
	[TPS6586X_INT_AC_DET]	= TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
	[TPS6586X_INT_BAT_DET]	= TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
	[TPS6586X_INT_CHG_STAT]	= TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
	[TPS6586X_INT_CHG_TEMP]	= TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
	[TPS6586X_INT_PP]	= TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
	[TPS6586X_INT_RESUME]	= TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
	[TPS6586X_INT_LOW_SYS]	= TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
	[TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
};

static struct resource tps6586x_rtc_resources[] = {
	{
		.start  = TPS6586X_INT_RTC_ALM1,
		.end	= TPS6586X_INT_RTC_ALM1,
		.flags	= IORESOURCE_IRQ,
	},
};

static const struct mfd_cell tps6586x_cell[] = {
	{
		.name = "tps6586x-gpio",
	},
	{
		.name = "tps6586x-regulator",
	},
	{
		.name = "tps6586x-rtc",
		.num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
		.resources = &tps6586x_rtc_resources[0],
	},
	{
		.name = "tps6586x-onkey",
	},
};

struct tps6586x {
	struct device		*dev;
	struct i2c_client	*client;
	struct regmap		*regmap;
	int			version;

	int			irq;
	struct irq_chip		irq_chip;
	struct mutex		irq_lock;
	int			irq_base;
	u32			irq_en;
	u8			mask_reg[5];
	struct irq_domain	*irq_domain;
};

static inline struct tps6586x *dev_to_tps6586x(struct device *dev)
{
	return i2c_get_clientdata(to_i2c_client(dev));
}

int tps6586x_write(struct device *dev, int reg, uint8_t val)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return regmap_write(tps6586x->regmap, reg, val);
}
EXPORT_SYMBOL_GPL(tps6586x_write);

int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return regmap_bulk_write(tps6586x->regmap, reg, val, len);
}
EXPORT_SYMBOL_GPL(tps6586x_writes);

int tps6586x_read(struct device *dev, int reg, uint8_t *val)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	unsigned int rval;
	int ret;

	ret = regmap_read(tps6586x->regmap, reg, &rval);
	if (!ret)
		*val = rval;
	return ret;
}
EXPORT_SYMBOL_GPL(tps6586x_read);

int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return regmap_bulk_read(tps6586x->regmap, reg, val, len);
}
EXPORT_SYMBOL_GPL(tps6586x_reads);

int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
}
EXPORT_SYMBOL_GPL(tps6586x_set_bits);

int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
}
EXPORT_SYMBOL_GPL(tps6586x_clr_bits);

int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return regmap_update_bits(tps6586x->regmap, reg, mask, val);
}
EXPORT_SYMBOL_GPL(tps6586x_update);

int tps6586x_irq_get_virq(struct device *dev, int irq)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return irq_create_mapping(tps6586x->irq_domain, irq);
}
EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);

int tps6586x_get_version(struct device *dev)
{
	struct tps6586x *tps6586x = dev_get_drvdata(dev);

	return tps6586x->version;
}
EXPORT_SYMBOL_GPL(tps6586x_get_version);

static int __remove_subdev(struct device *dev, void *unused)
{
	platform_device_unregister(to_platform_device(dev));
	return 0;
}

static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
{
	return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
}

static void tps6586x_irq_lock(struct irq_data *data)
{
	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);

	mutex_lock(&tps6586x->irq_lock);
}

static void tps6586x_irq_enable(struct irq_data *irq_data)
{
	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
	unsigned int __irq = irq_data->hwirq;
	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];

	tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
	tps6586x->irq_en |= (1 << __irq);
}

static void tps6586x_irq_disable(struct irq_data *irq_data)
{
	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);

	unsigned int __irq = irq_data->hwirq;
	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];

	tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
	tps6586x->irq_en &= ~(1 << __irq);
}

static void tps6586x_irq_sync_unlock(struct irq_data *data)
{
	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
	int i;

	for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
		int ret;
		ret = tps6586x_write(tps6586x->dev,
					    TPS6586X_INT_MASK1 + i,
					    tps6586x->mask_reg[i]);
		WARN_ON(ret);
	}

	mutex_unlock(&tps6586x->irq_lock);
}

#ifdef CONFIG_PM_SLEEP
static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
{
	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
	return irq_set_irq_wake(tps6586x->irq, on);
}
#else
#define tps6586x_irq_set_wake NULL
#endif

static struct irq_chip tps6586x_irq_chip = {
	.name = "tps6586x",
	.irq_bus_lock = tps6586x_irq_lock,
	.irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
	.irq_disable = tps6586x_irq_disable,
	.irq_enable = tps6586x_irq_enable,
	.irq_set_wake = tps6586x_irq_set_wake,
};

static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
				irq_hw_number_t hw)
{
	struct tps6586x *tps6586x = h->host_data;

	irq_set_chip_data(virq, tps6586x);
	irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
	irq_set_nested_thread(virq, 1);
	irq_set_noprobe(virq);

	return 0;
}

static const struct irq_domain_ops tps6586x_domain_ops = {
	.map    = tps6586x_irq_map,
	.xlate  = irq_domain_xlate_twocell,
};

static irqreturn_t tps6586x_irq(int irq, void *data)
{
	struct tps6586x *tps6586x = data;
	u32 acks;
	int ret = 0;

	ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
			     sizeof(acks), (uint8_t *)&acks);

	if (ret < 0) {
		dev_err(tps6586x->dev, "failed to read interrupt status\n");
		return IRQ_NONE;
	}

	acks = le32_to_cpu(acks);

	while (acks) {
		int i = __ffs(acks);

		if (tps6586x->irq_en & (1 << i))
			handle_nested_irq(
				irq_find_mapping(tps6586x->irq_domain, i));

		acks &= ~(1 << i);
	}

	return IRQ_HANDLED;
}

static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
				       int irq_base)
{
	int i, ret;
	u8 tmp[4];
	int new_irq_base;
	int irq_num = ARRAY_SIZE(tps6586x_irqs);

	tps6586x->irq = irq;

	mutex_init(&tps6586x->irq_lock);
	for (i = 0; i < 5; i++) {
		tps6586x->mask_reg[i] = 0xff;
		tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
	}

	tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);

	if  (irq_base > 0) {
		new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
		if (new_irq_base < 0) {
			dev_err(tps6586x->dev,
				"Failed to alloc IRQs: %d\n", new_irq_base);
			return new_irq_base;
		}
	} else {
		new_irq_base = 0;
	}

	tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
				irq_num, new_irq_base, &tps6586x_domain_ops,
				tps6586x);
	if (!tps6586x->irq_domain) {
		dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
		return -ENOMEM;
	}
	ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
				   "tps6586x", tps6586x);

	if (!ret)
		device_init_wakeup(tps6586x->dev, 1);

	return ret;
}

static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
					  struct tps6586x_platform_data *pdata)
{
	struct tps6586x_subdev_info *subdev;
	struct platform_device *pdev;
	int i, ret = 0;

	for (i = 0; i < pdata->num_subdevs; i++) {
		subdev = &pdata->subdevs[i];

		pdev = platform_device_alloc(subdev->name, subdev->id);
		if (!pdev) {
			ret = -ENOMEM;
			goto failed;
		}

		pdev->dev.parent = tps6586x->dev;
		pdev->dev.platform_data = subdev->platform_data;
		pdev->dev.of_node = subdev->of_node;

		ret = platform_device_add(pdev);
		if (ret) {
			platform_device_put(pdev);
			goto failed;
		}
	}
	return 0;

failed:
	tps6586x_remove_subdevs(tps6586x);
	return ret;
}

#ifdef CONFIG_OF
static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
{
	struct device_node *np = client->dev.of_node;
	struct tps6586x_platform_data *pdata;

	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata) {
		dev_err(&client->dev, "Memory allocation failed\n");
		return NULL;
	}

	pdata->num_subdevs = 0;
	pdata->subdevs = NULL;
	pdata->gpio_base = -1;
	pdata->irq_base = -1;
	pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");

	return pdata;
}

static const struct of_device_id tps6586x_of_match[] = {
	{ .compatible = "ti,tps6586x", },
	{ },
};
#else
static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
{
	return NULL;
}
#endif

static bool is_volatile_reg(struct device *dev, unsigned int reg)
{
	/* Cache all interrupt mask register */
	if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
		return false;

	return true;
}

static const struct regmap_config tps6586x_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = TPS6586X_MAX_REGISTER,
	.volatile_reg = is_volatile_reg,
	.cache_type = REGCACHE_RBTREE,
};

static struct device *tps6586x_dev;
static void tps6586x_power_off(void)
{
	if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
		return;

	tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
}

static void tps6586x_print_version(struct i2c_client *client, int version)
{
	const char *name;

	switch (version) {
	case TPS658621A:
		name = "TPS658621A";
		break;
	case TPS658621CD:
		name = "TPS658621C/D";
		break;
	case TPS658623:
		name = "TPS658623";
		break;
	case TPS658640:
	case TPS658640v2:
		name = "TPS658640";
		break;
	case TPS658643:
		name = "TPS658643";
		break;
	default:
		name = "TPS6586X";
		break;
	}

	dev_info(&client->dev, "Found %s, VERSIONCRC is %02x\n", name, version);
}

static int tps6586x_i2c_probe(struct i2c_client *client,
					const struct i2c_device_id *id)
{
	struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
	struct tps6586x *tps6586x;
	int ret;
	int version;

	if (!pdata && client->dev.of_node)
		pdata = tps6586x_parse_dt(client);

	if (!pdata) {
		dev_err(&client->dev, "tps6586x requires platform data\n");
		return -ENOTSUPP;
	}

	version = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
	if (version < 0) {
		dev_err(&client->dev, "Chip ID read failed: %d\n", version);
		return -EIO;
	}

	tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
	if (!tps6586x)
		return -ENOMEM;

	tps6586x->version = version;
	tps6586x_print_version(client, tps6586x->version);

	tps6586x->client = client;
	tps6586x->dev = &client->dev;
	i2c_set_clientdata(client, tps6586x);

	tps6586x->regmap = devm_regmap_init_i2c(client,
					&tps6586x_regmap_config);
	if (IS_ERR(tps6586x->regmap)) {
		ret = PTR_ERR(tps6586x->regmap);
		dev_err(&client->dev, "regmap init failed: %d\n", ret);
		return ret;
	}


	if (client->irq) {
		ret = tps6586x_irq_init(tps6586x, client->irq,
					pdata->irq_base);
		if (ret) {
			dev_err(&client->dev, "IRQ init failed: %d\n", ret);
			return ret;
		}
	}

	ret = mfd_add_devices(tps6586x->dev, -1,
			      tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
			      NULL, 0, tps6586x->irq_domain);
	if (ret < 0) {
		dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
		goto err_mfd_add;
	}

	ret = tps6586x_add_subdevs(tps6586x, pdata);
	if (ret) {
		dev_err(&client->dev, "add devices failed: %d\n", ret);
		goto err_add_devs;
	}

	if (pdata->pm_off && !pm_power_off) {
		tps6586x_dev = &client->dev;
		pm_power_off = tps6586x_power_off;
	}

	return 0;

err_add_devs:
	mfd_remove_devices(tps6586x->dev);
err_mfd_add:
	if (client->irq)
		free_irq(client->irq, tps6586x);
	return ret;
}

static int tps6586x_i2c_remove(struct i2c_client *client)
{
	struct tps6586x *tps6586x = i2c_get_clientdata(client);

	tps6586x_remove_subdevs(tps6586x);
	mfd_remove_devices(tps6586x->dev);
	if (client->irq)
		free_irq(client->irq, tps6586x);
	return 0;
}

static const struct i2c_device_id tps6586x_id_table[] = {
	{ "tps6586x", 0 },
	{ },
};
MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);

static struct i2c_driver tps6586x_driver = {
	.driver	= {
		.name	= "tps6586x",
		.of_match_table = of_match_ptr(tps6586x_of_match),
	},
	.probe		= tps6586x_i2c_probe,
	.remove		= tps6586x_i2c_remove,
	.id_table	= tps6586x_id_table,
};

static int __init tps6586x_init(void)
{
	return i2c_add_driver(&tps6586x_driver);
}
subsys_initcall(tps6586x_init);

static void __exit tps6586x_exit(void)
{
	i2c_del_driver(&tps6586x_driver);
}
module_exit(tps6586x_exit);

MODULE_DESCRIPTION("TPS6586X core driver");
MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
MODULE_LICENSE("GPL");
Commit	Line	Data
	1	/*
	2	* Core driver for TI TPS6586x PMIC family
	3	*
	4	* Copyright (c) 2010 CompuLab Ltd.
	5	* Mike Rapoport <mike@compulab.co.il>
	6	*
	7	* Based on da903x.c.
	8	* Copyright (C) 2008 Compulab, Ltd.
	9	* Mike Rapoport <mike@compulab.co.il>
	10	* Copyright (C) 2006-2008 Marvell International Ltd.
	11	* Eric Miao <eric.miao@marvell.com>
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License version 2 as
	15	* published by the Free Software Foundation.
	16	*/
	17
	18	#include <linux/interrupt.h>
	19	#include <linux/irq.h>
	20	#include <linux/irqdomain.h>
	21	#include <linux/kernel.h>
	22	#include <linux/module.h>
	23	#include <linux/mutex.h>
	24	#include <linux/slab.h>
	25	#include <linux/err.h>
	26	#include <linux/i2c.h>
	27	#include <linux/platform_device.h>
	28	#include <linux/regmap.h>
	29	#include <linux/of.h>
	30
	31	#include <linux/mfd/core.h>
	32	#include <linux/mfd/tps6586x.h>
	33
	34	#define TPS6586X_SUPPLYENE 0x14
	35	#define EXITSLREQ_BIT BIT(1)
	36	#define SLEEP_MODE_BIT BIT(3)
	37
	38	/* interrupt control registers */
	39	#define TPS6586X_INT_ACK1 0xb5
	40	#define TPS6586X_INT_ACK2 0xb6
	41	#define TPS6586X_INT_ACK3 0xb7
	42	#define TPS6586X_INT_ACK4 0xb8
	43
	44	/* interrupt mask registers */
	45	#define TPS6586X_INT_MASK1 0xb0
	46	#define TPS6586X_INT_MASK2 0xb1
	47	#define TPS6586X_INT_MASK3 0xb2
	48	#define TPS6586X_INT_MASK4 0xb3
	49	#define TPS6586X_INT_MASK5 0xb4
	50
	51	/* device id */
	52	#define TPS6586X_VERSIONCRC 0xcd
	53
	54	/* Maximum register */
	55	#define TPS6586X_MAX_REGISTER TPS6586X_VERSIONCRC
	56
	57	struct tps6586x_irq_data {
	58	u8 mask_reg;
	59	u8 mask_mask;
	60	};
	61
	62	#define TPS6586X_IRQ(_reg, _mask) \
	63	{ \
	64	.mask_reg = (_reg) - TPS6586X_INT_MASK1, \
	65	.mask_mask = (_mask), \
	66	}
	67
	68	static const struct tps6586x_irq_data tps6586x_irqs[] = {
	69	[TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
	70	[TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
	71	[TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
	72	[TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
	73	[TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
	74	[TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
	75	[TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
	76	[TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
	77	[TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
	78	[TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
	79	[TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
	80	[TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
	81	[TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
	82	[TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
	83	[TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
	84	[TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
	85	[TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
	86	[TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
	87	[TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
	88	[TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
	89	[TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
	90	[TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
	91	[TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
	92	[TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
	93	[TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
	94	[TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
	95	[TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
	96	};
	97
	98	static struct resource tps6586x_rtc_resources[] = {
	99	{
	100	.start = TPS6586X_INT_RTC_ALM1,
	101	.end = TPS6586X_INT_RTC_ALM1,
	102	.flags = IORESOURCE_IRQ,
	103	},
	104	};
	105
	106	static const struct mfd_cell tps6586x_cell[] = {
	107	{
	108	.name = "tps6586x-gpio",
	109	},
	110	{
	111	.name = "tps6586x-regulator",
	112	},
	113	{
	114	.name = "tps6586x-rtc",
	115	.num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
	116	.resources = &tps6586x_rtc_resources[0],
	117	},
	118	{
	119	.name = "tps6586x-onkey",
	120	},
	121	};
	122
	123	struct tps6586x {
	124	struct device *dev;
	125	struct i2c_client *client;
	126	struct regmap *regmap;
	127	int version;
	128
	129	int irq;
	130	struct irq_chip irq_chip;
	131	struct mutex irq_lock;
	132	int irq_base;
	133	u32 irq_en;
	134	u8 mask_reg[5];
	135	struct irq_domain *irq_domain;
	136	};
	137
	138	static inline struct tps6586x dev_to_tps6586x(struct device dev)
	139	{
	140	return i2c_get_clientdata(to_i2c_client(dev));
	141	}
	142
	143	int tps6586x_write(struct device *dev, int reg, uint8_t val)
	144	{
	145	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	146
	147	return regmap_write(tps6586x->regmap, reg, val);
	148	}
	149	EXPORT_SYMBOL_GPL(tps6586x_write);
	150
	151	int tps6586x_writes(struct device dev, int reg, int len, uint8_t val)
	152	{
	153	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	154
	155	return regmap_bulk_write(tps6586x->regmap, reg, val, len);
	156	}
	157	EXPORT_SYMBOL_GPL(tps6586x_writes);
	158
	159	int tps6586x_read(struct device dev, int reg, uint8_t val)
	160	{
	161	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	162	unsigned int rval;
	163	int ret;
	164
	165	ret = regmap_read(tps6586x->regmap, reg, &rval);
	166	if (!ret)
	167	*val = rval;
	168	return ret;
	169	}
	170	EXPORT_SYMBOL_GPL(tps6586x_read);
	171
	172	int tps6586x_reads(struct device dev, int reg, int len, uint8_t val)
	173	{
	174	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	175
	176	return regmap_bulk_read(tps6586x->regmap, reg, val, len);
	177	}
	178	EXPORT_SYMBOL_GPL(tps6586x_reads);
	179
	180	int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
	181	{
	182	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	183
	184	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
	185	}
	186	EXPORT_SYMBOL_GPL(tps6586x_set_bits);
	187
	188	int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
	189	{
	190	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	191
	192	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
	193	}
	194	EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
	195
	196	int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
	197	{
	198	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	199
	200	return regmap_update_bits(tps6586x->regmap, reg, mask, val);
	201	}
	202	EXPORT_SYMBOL_GPL(tps6586x_update);
	203
	204	int tps6586x_irq_get_virq(struct device *dev, int irq)
	205	{
	206	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	207
	208	return irq_create_mapping(tps6586x->irq_domain, irq);
	209	}
	210	EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
	211
	212	int tps6586x_get_version(struct device *dev)
	213	{
	214	struct tps6586x *tps6586x = dev_get_drvdata(dev);
	215
	216	return tps6586x->version;
	217	}
	218	EXPORT_SYMBOL_GPL(tps6586x_get_version);
	219
	220	static int __remove_subdev(struct device dev, void unused)
	221	{
	222	platform_device_unregister(to_platform_device(dev));
	223	return 0;
	224	}
	225
	226	static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
	227	{
	228	return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
	229	}
	230
	231	static void tps6586x_irq_lock(struct irq_data *data)
	232	{
	233	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
	234
	235	mutex_lock(&tps6586x->irq_lock);
	236	}
	237
	238	static void tps6586x_irq_enable(struct irq_data *irq_data)
	239	{
	240	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
	241	unsigned int __irq = irq_data->hwirq;
	242	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
	243
	244	tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
	245	tps6586x->irq_en \|= (1 << __irq);
	246	}
	247
	248	static void tps6586x_irq_disable(struct irq_data *irq_data)
	249	{
	250	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
	251
	252	unsigned int __irq = irq_data->hwirq;
	253	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
	254
	255	tps6586x->mask_reg[data->mask_reg] \|= data->mask_mask;
	256	tps6586x->irq_en &= ~(1 << __irq);
	257	}
	258
	259	static void tps6586x_irq_sync_unlock(struct irq_data *data)
	260	{
	261	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
	262	int i;
	263
	264	for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
	265	int ret;
	266	ret = tps6586x_write(tps6586x->dev,
	267	TPS6586X_INT_MASK1 + i,
	268	tps6586x->mask_reg[i]);
	269	WARN_ON(ret);
	270	}
	271
	272	mutex_unlock(&tps6586x->irq_lock);
	273	}
	274
	275	#ifdef CONFIG_PM_SLEEP
	276	static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
	277	{
	278	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
	279	return irq_set_irq_wake(tps6586x->irq, on);
	280	}
	281	#else
	282	#define tps6586x_irq_set_wake NULL
	283	#endif
	284
	285	static struct irq_chip tps6586x_irq_chip = {
	286	.name = "tps6586x",
	287	.irq_bus_lock = tps6586x_irq_lock,
	288	.irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
	289	.irq_disable = tps6586x_irq_disable,
	290	.irq_enable = tps6586x_irq_enable,
	291	.irq_set_wake = tps6586x_irq_set_wake,
	292	};
	293
	294	static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
	295	irq_hw_number_t hw)
	296	{
	297	struct tps6586x *tps6586x = h->host_data;
	298
	299	irq_set_chip_data(virq, tps6586x);
	300	irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
	301	irq_set_nested_thread(virq, 1);
	302	irq_set_noprobe(virq);
	303
	304	return 0;
	305	}
	306
	307	static const struct irq_domain_ops tps6586x_domain_ops = {
	308	.map = tps6586x_irq_map,
	309	.xlate = irq_domain_xlate_twocell,
	310	};
	311
	312	static irqreturn_t tps6586x_irq(int irq, void *data)
	313	{
	314	struct tps6586x *tps6586x = data;
	315	u32 acks;
	316	int ret = 0;
	317
	318	ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
	319	sizeof(acks), (uint8_t *)&acks);
	320
	321	if (ret < 0) {
	322	dev_err(tps6586x->dev, "failed to read interrupt status\n");
	323	return IRQ_NONE;
	324	}
	325
	326	acks = le32_to_cpu(acks);
	327
	328	while (acks) {
	329	int i = __ffs(acks);
	330
	331	if (tps6586x->irq_en & (1 << i))
	332	handle_nested_irq(
	333	irq_find_mapping(tps6586x->irq_domain, i));
	334
	335	acks &= ~(1 << i);
	336	}
	337
	338	return IRQ_HANDLED;
	339	}
	340
	341	static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
	342	int irq_base)
	343	{
	344	int i, ret;
	345	u8 tmp[4];
	346	int new_irq_base;
	347	int irq_num = ARRAY_SIZE(tps6586x_irqs);
	348
	349	tps6586x->irq = irq;
	350
	351	mutex_init(&tps6586x->irq_lock);
	352	for (i = 0; i < 5; i++) {
	353	tps6586x->mask_reg[i] = 0xff;
	354	tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
	355	}
	356
	357	tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
	358
	359	if (irq_base > 0) {
	360	new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
	361	if (new_irq_base < 0) {
	362	dev_err(tps6586x->dev,
	363	"Failed to alloc IRQs: %d\n", new_irq_base);
	364	return new_irq_base;
	365	}
	366	} else {
	367	new_irq_base = 0;
	368	}
	369
	370	tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
	371	irq_num, new_irq_base, &tps6586x_domain_ops,
	372	tps6586x);
	373	if (!tps6586x->irq_domain) {
	374	dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
	375	return -ENOMEM;
	376	}
	377	ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
	378	"tps6586x", tps6586x);
	379
	380	if (!ret)
	381	device_init_wakeup(tps6586x->dev, 1);
	382
	383	return ret;
	384	}
	385
	386	static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
	387	struct tps6586x_platform_data *pdata)
	388	{
	389	struct tps6586x_subdev_info *subdev;
	390	struct platform_device *pdev;
	391	int i, ret = 0;
	392
	393	for (i = 0; i < pdata->num_subdevs; i++) {
	394	subdev = &pdata->subdevs[i];
	395
	396	pdev = platform_device_alloc(subdev->name, subdev->id);
	397	if (!pdev) {
	398	ret = -ENOMEM;
	399	goto failed;
	400	}
	401
	402	pdev->dev.parent = tps6586x->dev;
	403	pdev->dev.platform_data = subdev->platform_data;
	404	pdev->dev.of_node = subdev->of_node;
	405
	406	ret = platform_device_add(pdev);
	407	if (ret) {
	408	platform_device_put(pdev);
	409	goto failed;
	410	}
	411	}
	412	return 0;
	413
	414	failed:
	415	tps6586x_remove_subdevs(tps6586x);
	416	return ret;
	417	}
	418
	419	#ifdef CONFIG_OF
	420	static struct tps6586x_platform_data tps6586x_parse_dt(struct i2c_client client)
	421	{
	422	struct device_node *np = client->dev.of_node;
	423	struct tps6586x_platform_data *pdata;
	424
	425	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
	426	if (!pdata) {
	427	dev_err(&client->dev, "Memory allocation failed\n");
	428	return NULL;
	429	}
	430
	431	pdata->num_subdevs = 0;
	432	pdata->subdevs = NULL;
	433	pdata->gpio_base = -1;
	434	pdata->irq_base = -1;
	435	pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");
	436
	437	return pdata;
	438	}
	439
	440	static const struct of_device_id tps6586x_of_match[] = {
	441	{ .compatible = "ti,tps6586x", },
	442	{ },
	443	};
	444	#else
	445	static struct tps6586x_platform_data tps6586x_parse_dt(struct i2c_client client)
	446	{
	447	return NULL;
	448	}
	449	#endif
	450
	451	static bool is_volatile_reg(struct device *dev, unsigned int reg)
	452	{
	453	/* Cache all interrupt mask register */
	454	if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
	455	return false;
	456
	457	return true;
	458	}
	459
	460	static const struct regmap_config tps6586x_regmap_config = {
	461	.reg_bits = 8,
	462	.val_bits = 8,
	463	.max_register = TPS6586X_MAX_REGISTER,
	464	.volatile_reg = is_volatile_reg,
	465	.cache_type = REGCACHE_RBTREE,
	466	};
	467
	468	static struct device *tps6586x_dev;
	469	static void tps6586x_power_off(void)
	470	{
	471	if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
	472	return;
	473
	474	tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
	475	}
	476
	477	static void tps6586x_print_version(struct i2c_client *client, int version)
	478	{
	479	const char *name;
	480
	481	switch (version) {
	482	case TPS658621A:
	483	name = "TPS658621A";
	484	break;
	485	case TPS658621CD:
	486	name = "TPS658621C/D";
	487	break;
	488	case TPS658623:
	489	name = "TPS658623";
	490	break;
	491	case TPS658640:
	492	case TPS658640v2:
	493	name = "TPS658640";
	494	break;
	495	case TPS658643:
	496	name = "TPS658643";
	497	break;
	498	default:
	499	name = "TPS6586X";
	500	break;
	501	}
	502
	503	dev_info(&client->dev, "Found %s, VERSIONCRC is %02x\n", name, version);
	504	}
	505
	506	static int tps6586x_i2c_probe(struct i2c_client *client,
	507	const struct i2c_device_id *id)
	508	{
	509	struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
	510	struct tps6586x *tps6586x;
	511	int ret;
	512	int version;
	513
	514	if (!pdata && client->dev.of_node)
	515	pdata = tps6586x_parse_dt(client);
	516
	517	if (!pdata) {
	518	dev_err(&client->dev, "tps6586x requires platform data\n");
	519	return -ENOTSUPP;
	520	}
	521
	522	version = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
	523	if (version < 0) {
	524	dev_err(&client->dev, "Chip ID read failed: %d\n", version);
	525	return -EIO;
	526	}
	527
	528	tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
	529	if (!tps6586x)
	530	return -ENOMEM;
	531
	532	tps6586x->version = version;
	533	tps6586x_print_version(client, tps6586x->version);
	534
	535	tps6586x->client = client;
	536	tps6586x->dev = &client->dev;
	537	i2c_set_clientdata(client, tps6586x);
	538
	539	tps6586x->regmap = devm_regmap_init_i2c(client,
	540	&tps6586x_regmap_config);
	541	if (IS_ERR(tps6586x->regmap)) {
	542	ret = PTR_ERR(tps6586x->regmap);
	543	dev_err(&client->dev, "regmap init failed: %d\n", ret);
	544	return ret;
	545	}
	546
	547
	548	if (client->irq) {
	549	ret = tps6586x_irq_init(tps6586x, client->irq,
	550	pdata->irq_base);
	551	if (ret) {
	552	dev_err(&client->dev, "IRQ init failed: %d\n", ret);
	553	return ret;
	554	}
	555	}
	556
	557	ret = mfd_add_devices(tps6586x->dev, -1,
	558	tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
	559	NULL, 0, tps6586x->irq_domain);
	560	if (ret < 0) {
	561	dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
	562	goto err_mfd_add;
	563	}
	564
	565	ret = tps6586x_add_subdevs(tps6586x, pdata);
	566	if (ret) {
	567	dev_err(&client->dev, "add devices failed: %d\n", ret);
	568	goto err_add_devs;
	569	}
	570
	571	if (pdata->pm_off && !pm_power_off) {
	572	tps6586x_dev = &client->dev;
	573	pm_power_off = tps6586x_power_off;
	574	}
	575
	576	return 0;
	577
	578	err_add_devs:
	579	mfd_remove_devices(tps6586x->dev);
	580	err_mfd_add:
	581	if (client->irq)
	582	free_irq(client->irq, tps6586x);
	583	return ret;
	584	}
	585
	586	static int tps6586x_i2c_remove(struct i2c_client *client)
	587	{
	588	struct tps6586x *tps6586x = i2c_get_clientdata(client);
	589
	590	tps6586x_remove_subdevs(tps6586x);
	591	mfd_remove_devices(tps6586x->dev);
	592	if (client->irq)
	593	free_irq(client->irq, tps6586x);
	594	return 0;
	595	}
	596
	597	static const struct i2c_device_id tps6586x_id_table[] = {
	598	{ "tps6586x", 0 },
	599	{ },
	600	};
	601	MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
	602
	603	static struct i2c_driver tps6586x_driver = {
	604	.driver = {
	605	.name = "tps6586x",
	606	.of_match_table = of_match_ptr(tps6586x_of_match),
	607	},
	608	.probe = tps6586x_i2c_probe,
	609	.remove = tps6586x_i2c_remove,
	610	.id_table = tps6586x_id_table,
	611	};
	612
	613	static int __init tps6586x_init(void)
	614	{
	615	return i2c_add_driver(&tps6586x_driver);
	616	}
	617	subsys_initcall(tps6586x_init);
	618
	619	static void __exit tps6586x_exit(void)
	620	{
	621	i2c_del_driver(&tps6586x_driver);
	622	}
	623	module_exit(tps6586x_exit);
	624
	625	MODULE_DESCRIPTION("TPS6586X core driver");
	626	MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
	627	MODULE_LICENSE("GPL");