[linux-2.6-block.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/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 + 1)

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 struct mfd_cell tps6586x_cell[] = {
	{
		.name = "tps6586x-gpio",
	},
	{
		.name = "tps6586x-pmic",
	},
	{
		.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;

	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);

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);
}

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,
};

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);

	/* ARM needs us to explicitly flag the IRQ as valid
	 * and will set them noprobe when we do so. */
#ifdef CONFIG_ARM
	set_irq_flags(virq, IRQF_VALID);
#else
	irq_set_noprobe(virq);
#endif

	return 0;
}

static 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);

	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);
		enable_irq_wake(irq);
	}

	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 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 - 1,
	.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 int tps6586x_i2c_probe(struct i2c_client *client,
					const struct i2c_device_id *id)
{
	struct tps6586x_platform_data *pdata = client->dev.platform_data;
	struct tps6586x *tps6586x;
	int ret;

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

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

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

	dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);

	tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
	if (tps6586x == NULL) {
		dev_err(&client->dev, "memory for tps6586x alloc failed\n");
		return -ENOMEM;
	}

	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",
		.owner	= THIS_MODULE,
		.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
c6c19332 MR	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
c26448c4 GK	18	#include <linux/interrupt.h>
c26448c4 GK	19	#include <linux/irq.h>
605511a8	20	#include <linux/irqdomain.h>
c6c19332 MR	21	#include <linux/kernel.h>
	22	#include <linux/module.h>
	23	#include <linux/mutex.h>
	24	#include <linux/slab.h>
1176b5be	25	#include <linux/err.h>
c6c19332	26	#include <linux/i2c.h>
605511a8	27	#include <linux/platform_device.h>
1176b5be	28	#include <linux/regmap.h>
c6c19332 MR	29
	30	#include <linux/mfd/core.h>
	31	#include <linux/mfd/tps6586x.h>
	32
004c15a6 BH	33	#define TPS6586X_SUPPLYENE 0x14
	34	#define EXITSLREQ_BIT BIT(1)
	35	#define SLEEP_MODE_BIT BIT(3)
	36
c26448c4 GK	37	/* interrupt control registers */
	38	#define TPS6586X_INT_ACK1 0xb5
	39	#define TPS6586X_INT_ACK2 0xb6
	40	#define TPS6586X_INT_ACK3 0xb7
	41	#define TPS6586X_INT_ACK4 0xb8
	42
	43	/* interrupt mask registers */
	44	#define TPS6586X_INT_MASK1 0xb0
	45	#define TPS6586X_INT_MASK2 0xb1
	46	#define TPS6586X_INT_MASK3 0xb2
	47	#define TPS6586X_INT_MASK4 0xb3
	48	#define TPS6586X_INT_MASK5 0xb4
	49
c6c19332 MR	50	/* device id */
c6c19332 MR	51	#define TPS6586X_VERSIONCRC 0xcd
c6c19332	52
1176b5be LD	53	/* Maximum register */
	54	#define TPS6586X_MAX_REGISTER (TPS6586X_VERSIONCRC + 1)
	55
c26448c4 GK	56	struct tps6586x_irq_data {
	57	u8 mask_reg;
	58	u8 mask_mask;
	59	};
	60
	61	#define TPS6586X_IRQ(_reg, _mask) \
	62	{ \
	63	.mask_reg = (_reg) - TPS6586X_INT_MASK1, \
	64	.mask_mask = (_mask), \
	65	}
	66
	67	static const struct tps6586x_irq_data tps6586x_irqs[] = {
	68	[TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
	69	[TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
	70	[TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
	71	[TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
	72	[TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
	73	[TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
	74	[TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
	75	[TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
	76	[TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
	77	[TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
	78	[TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
	79	[TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
	80	[TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
	81	[TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
	82	[TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
	83	[TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
	84	[TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
	85	[TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
	86	[TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
	87	[TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
	88	[TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
	89	[TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
	90	[TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
	91	[TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
	92	[TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
	93	[TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
	94	[TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
	95	};
	96
5b8b1fe2 LD	97	static struct resource tps6586x_rtc_resources[] = {
	98	{
	99	.start = TPS6586X_INT_RTC_ALM1,
	100	.end = TPS6586X_INT_RTC_ALM1,
	101	.flags = IORESOURCE_IRQ,
	102	},
	103	};
	104
7a7487cb LD	105	static struct mfd_cell tps6586x_cell[] = {
	106	{
	107	.name = "tps6586x-gpio",
	108	},
64e48160 LD	109	{
	110	.name = "tps6586x-pmic",
	111	},
7a7487cb LD	112	{
7a7487cb LD	113	.name = "tps6586x-rtc",
5b8b1fe2 LD	114	.num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
5b8b1fe2 LD	115	.resources = &tps6586x_rtc_resources[0],
7a7487cb LD	116	},
	117	{
	118	.name = "tps6586x-onkey",
	119	},
	120	};
	121
c6c19332	122	struct tps6586x {
c6c19332 MR	123	struct device *dev;
c6c19332 MR	124	struct i2c_client *client;
1176b5be	125	struct regmap *regmap;
c6c19332	126
c26448c4 GK	127	struct irq_chip irq_chip;
	128	struct mutex irq_lock;
	129	int irq_base;
	130	u32 irq_en;
c26448c4	131	u8 mask_reg[5];
605511a8	132	struct irq_domain *irq_domain;
c6c19332 MR	133	};
c6c19332 MR	134
1176b5be	135	static inline struct tps6586x dev_to_tps6586x(struct device dev)
c6c19332	136	{
1176b5be	137	return i2c_get_clientdata(to_i2c_client(dev));
c6c19332 MR	138	}
	139
	140	int tps6586x_write(struct device *dev, int reg, uint8_t val)
	141	{
1176b5be LD	142	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	143
	144	return regmap_write(tps6586x->regmap, reg, val);
c6c19332 MR	145	}
	146	EXPORT_SYMBOL_GPL(tps6586x_write);
	147
	148	int tps6586x_writes(struct device dev, int reg, int len, uint8_t val)
	149	{
1176b5be LD	150	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	151
	152	return regmap_bulk_write(tps6586x->regmap, reg, val, len);
c6c19332 MR	153	}
	154	EXPORT_SYMBOL_GPL(tps6586x_writes);
	155
	156	int tps6586x_read(struct device dev, int reg, uint8_t val)
	157	{
1176b5be LD	158	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	159	unsigned int rval;
	160	int ret;
	161
	162	ret = regmap_read(tps6586x->regmap, reg, &rval);
	163	if (!ret)
	164	*val = rval;
	165	return ret;
c6c19332 MR	166	}
	167	EXPORT_SYMBOL_GPL(tps6586x_read);
	168
	169	int tps6586x_reads(struct device dev, int reg, int len, uint8_t val)
	170	{
1176b5be LD	171	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	172
	173	return regmap_bulk_read(tps6586x->regmap, reg, val, len);
c6c19332 MR	174	}
	175	EXPORT_SYMBOL_GPL(tps6586x_reads);
	176
	177	int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
	178	{
1176b5be	179	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
c6c19332	180
1176b5be	181	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
c6c19332 MR	182	}
	183	EXPORT_SYMBOL_GPL(tps6586x_set_bits);
	184
	185	int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
	186	{
1176b5be	187	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
c6c19332	188
1176b5be	189	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
c6c19332 MR	190	}
	191	EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
	192
	193	int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
	194	{
1176b5be	195	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
c6c19332	196
1176b5be	197	return regmap_update_bits(tps6586x->regmap, reg, mask, val);
c6c19332 MR	198	}
	199	EXPORT_SYMBOL_GPL(tps6586x_update);
	200
605511a8 LD	201	int tps6586x_irq_get_virq(struct device *dev, int irq)
	202	{
	203	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	204
	205	return irq_create_mapping(tps6586x->irq_domain, irq);
	206	}
	207	EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
	208
c6c19332 MR	209	static int __remove_subdev(struct device dev, void unused)
	210	{
	211	platform_device_unregister(to_platform_device(dev));
	212	return 0;
	213	}
	214
	215	static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
	216	{
	217	return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
	218	}
	219
96e824bd	220	static void tps6586x_irq_lock(struct irq_data *data)
c26448c4	221	{
96e824bd	222	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
c26448c4 GK	223
	224	mutex_lock(&tps6586x->irq_lock);
	225	}
	226
96e824bd	227	static void tps6586x_irq_enable(struct irq_data *irq_data)
c26448c4	228	{
96e824bd	229	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
605511a8	230	unsigned int __irq = irq_data->hwirq;
c26448c4 GK	231	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
	232
	233	tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
	234	tps6586x->irq_en \|= (1 << __irq);
	235	}
	236
96e824bd	237	static void tps6586x_irq_disable(struct irq_data *irq_data)
c26448c4	238	{
96e824bd	239	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
c26448c4	240
605511a8	241	unsigned int __irq = irq_data->hwirq;
c26448c4 GK	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
96e824bd	248	static void tps6586x_irq_sync_unlock(struct irq_data *data)
c26448c4	249	{
96e824bd	250	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
c26448c4 GK	251	int i;
	252
	253	for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
75edd5af LD	254	int ret;
	255	ret = tps6586x_write(tps6586x->dev,
	256	TPS6586X_INT_MASK1 + i,
	257	tps6586x->mask_reg[i]);
	258	WARN_ON(ret);
c26448c4 GK	259	}
	260
	261	mutex_unlock(&tps6586x->irq_lock);
	262	}
	263
605511a8 LD	264	static struct irq_chip tps6586x_irq_chip = {
	265	.name = "tps6586x",
	266	.irq_bus_lock = tps6586x_irq_lock,
	267	.irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
	268	.irq_disable = tps6586x_irq_disable,
	269	.irq_enable = tps6586x_irq_enable,
	270	};
	271
	272	static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
	273	irq_hw_number_t hw)
	274	{
	275	struct tps6586x *tps6586x = h->host_data;
	276
	277	irq_set_chip_data(virq, tps6586x);
	278	irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
	279	irq_set_nested_thread(virq, 1);
	280
	281	/* ARM needs us to explicitly flag the IRQ as valid
	282	* and will set them noprobe when we do so. */
	283	#ifdef CONFIG_ARM
	284	set_irq_flags(virq, IRQF_VALID);
	285	#else
	286	irq_set_noprobe(virq);
	287	#endif
	288
	289	return 0;
	290	}
	291
	292	static struct irq_domain_ops tps6586x_domain_ops = {
	293	.map = tps6586x_irq_map,
	294	.xlate = irq_domain_xlate_twocell,
	295	};
	296
c26448c4 GK	297	static irqreturn_t tps6586x_irq(int irq, void *data)
	298	{
	299	struct tps6586x *tps6586x = data;
	300	u32 acks;
	301	int ret = 0;
	302
	303	ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
	304	sizeof(acks), (uint8_t *)&acks);
	305
	306	if (ret < 0) {
	307	dev_err(tps6586x->dev, "failed to read interrupt status\n");
	308	return IRQ_NONE;
	309	}
	310
	311	acks = le32_to_cpu(acks);
	312
	313	while (acks) {
	314	int i = __ffs(acks);
	315
	316	if (tps6586x->irq_en & (1 << i))
605511a8 LD	317	handle_nested_irq(
605511a8 LD	318	irq_find_mapping(tps6586x->irq_domain, i));
c26448c4 GK	319
	320	acks &= ~(1 << i);
	321	}
	322
	323	return IRQ_HANDLED;
	324	}
	325
f791be49	326	static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
c26448c4 GK	327	int irq_base)
	328	{
	329	int i, ret;
	330	u8 tmp[4];
605511a8 LD	331	int new_irq_base;
605511a8 LD	332	int irq_num = ARRAY_SIZE(tps6586x_irqs);
c26448c4 GK	333
	334	mutex_init(&tps6586x->irq_lock);
	335	for (i = 0; i < 5; i++) {
c26448c4 GK	336	tps6586x->mask_reg[i] = 0xff;
	337	tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
	338	}
	339
	340	tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
	341
605511a8 LD	342	if (irq_base > 0) {
	343	new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
	344	if (new_irq_base < 0) {
	345	dev_err(tps6586x->dev,
	346	"Failed to alloc IRQs: %d\n", new_irq_base);
	347	return new_irq_base;
	348	}
	349	} else {
	350	new_irq_base = 0;
c26448c4 GK	351	}
c26448c4 GK	352
605511a8 LD	353	tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
	354	irq_num, new_irq_base, &tps6586x_domain_ops,
	355	tps6586x);
	356	if (!tps6586x->irq_domain) {
	357	dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
	358	return -ENOMEM;
	359	}
c26448c4 GK	360	ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
	361	"tps6586x", tps6586x);
	362
	363	if (!ret) {
	364	device_init_wakeup(tps6586x->dev, 1);
	365	enable_irq_wake(irq);
	366	}
	367
	368	return ret;
	369	}
	370
f791be49	371	static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
c6c19332 MR	372	struct tps6586x_platform_data *pdata)
	373	{
	374	struct tps6586x_subdev_info *subdev;
	375	struct platform_device *pdev;
	376	int i, ret = 0;
	377
	378	for (i = 0; i < pdata->num_subdevs; i++) {
	379	subdev = &pdata->subdevs[i];
	380
	381	pdev = platform_device_alloc(subdev->name, subdev->id);
929980ab AL	382	if (!pdev) {
	383	ret = -ENOMEM;
	384	goto failed;
	385	}
c6c19332 MR	386
	387	pdev->dev.parent = tps6586x->dev;
	388	pdev->dev.platform_data = subdev->platform_data;
62f6b087	389	pdev->dev.of_node = subdev->of_node;
c6c19332 MR	390
c6c19332 MR	391	ret = platform_device_add(pdev);
929980ab AL	392	if (ret) {
929980ab AL	393	platform_device_put(pdev);
c6c19332	394	goto failed;
929980ab	395	}
c6c19332 MR	396	}
	397	return 0;
	398
	399	failed:
	400	tps6586x_remove_subdevs(tps6586x);
	401	return ret;
	402	}
	403
62f6b087	404	#ifdef CONFIG_OF
62f6b087 TR	405	static struct tps6586x_platform_data tps6586x_parse_dt(struct i2c_client client)
62f6b087 TR	406	{
62f6b087 TR	407	struct device_node *np = client->dev.of_node;
62f6b087 TR	408	struct tps6586x_platform_data *pdata;
62f6b087 TR	409
62f6b087 TR	410	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
64e48160 LD	411	if (!pdata) {
64e48160 LD	412	dev_err(&client->dev, "Memory allocation failed\n");
62f6b087	413	return NULL;
64e48160	414	}
62f6b087	415
64e48160 LD	416	pdata->num_subdevs = 0;
64e48160 LD	417	pdata->subdevs = NULL;
62f6b087 TR	418	pdata->gpio_base = -1;
62f6b087 TR	419	pdata->irq_base = -1;
004c15a6	420	pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");
62f6b087 TR	421
	422	return pdata;
	423	}
	424
	425	static struct of_device_id tps6586x_of_match[] = {
	426	{ .compatible = "ti,tps6586x", },
	427	{ },
	428	};
	429	#else
	430	static struct tps6586x_platform_data tps6586x_parse_dt(struct i2c_client client)
	431	{
	432	return NULL;
	433	}
	434	#endif
	435
75edd5af LD	436	static bool is_volatile_reg(struct device *dev, unsigned int reg)
	437	{
	438	/* Cache all interrupt mask register */
	439	if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
	440	return false;
	441
	442	return true;
	443	}
	444
1176b5be LD	445	static const struct regmap_config tps6586x_regmap_config = {
	446	.reg_bits = 8,
	447	.val_bits = 8,
	448	.max_register = TPS6586X_MAX_REGISTER - 1,
75edd5af LD	449	.volatile_reg = is_volatile_reg,
75edd5af LD	450	.cache_type = REGCACHE_RBTREE,
1176b5be LD	451	};
1176b5be LD	452
004c15a6 BH	453	static struct device *tps6586x_dev;
	454	static void tps6586x_power_off(void)
	455	{
	456	if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
	457	return;
	458
	459	tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
	460	}
	461
f791be49	462	static int tps6586x_i2c_probe(struct i2c_client *client,
c6c19332 MR	463	const struct i2c_device_id *id)
	464	{
	465	struct tps6586x_platform_data *pdata = client->dev.platform_data;
	466	struct tps6586x *tps6586x;
	467	int ret;
	468
62f6b087 TR	469	if (!pdata && client->dev.of_node)
	470	pdata = tps6586x_parse_dt(client);
	471
c6c19332 MR	472	if (!pdata) {
	473	dev_err(&client->dev, "tps6586x requires platform data\n");
	474	return -ENOTSUPP;
	475	}
	476
	477	ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
	478	if (ret < 0) {
	479	dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
	480	return -EIO;
	481	}
	482
4d1cdbf6	483	dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
c6c19332	484
b6719412 LD	485	tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
	486	if (tps6586x == NULL) {
	487	dev_err(&client->dev, "memory for tps6586x alloc failed\n");
c6c19332	488	return -ENOMEM;
b6719412	489	}
c6c19332 MR	490
	491	tps6586x->client = client;
	492	tps6586x->dev = &client->dev;
	493	i2c_set_clientdata(client, tps6586x);
	494
1176b5be LD	495	tps6586x->regmap = devm_regmap_init_i2c(client,
	496	&tps6586x_regmap_config);
	497	if (IS_ERR(tps6586x->regmap)) {
	498	ret = PTR_ERR(tps6586x->regmap);
	499	dev_err(&client->dev, "regmap init failed: %d\n", ret);
	500	return ret;
	501	}
	502
c6c19332	503
c26448c4 GK	504	if (client->irq) {
	505	ret = tps6586x_irq_init(tps6586x, client->irq,
	506	pdata->irq_base);
	507	if (ret) {
	508	dev_err(&client->dev, "IRQ init failed: %d\n", ret);
b6719412	509	return ret;
c26448c4 GK	510	}
	511	}
	512
7a7487cb	513	ret = mfd_add_devices(tps6586x->dev, -1,
0848c94f	514	tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
5b8b1fe2	515	NULL, 0, tps6586x->irq_domain);
7a7487cb LD	516	if (ret < 0) {
	517	dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
	518	goto err_mfd_add;
6f9f13bf VP	519	}
6f9f13bf VP	520
c6c19332 MR	521	ret = tps6586x_add_subdevs(tps6586x, pdata);
	522	if (ret) {
	523	dev_err(&client->dev, "add devices failed: %d\n", ret);
	524	goto err_add_devs;
	525	}
	526
004c15a6 BH	527	if (pdata->pm_off && !pm_power_off) {
	528	tps6586x_dev = &client->dev;
	529	pm_power_off = tps6586x_power_off;
	530	}
	531
c6c19332 MR	532	return 0;
	533
	534	err_add_devs:
7a7487cb LD	535	mfd_remove_devices(tps6586x->dev);
7a7487cb LD	536	err_mfd_add:
c26448c4 GK	537	if (client->irq)
c26448c4 GK	538	free_irq(client->irq, tps6586x);
c6c19332 MR	539	return ret;
	540	}
	541
4740f73f	542	static int tps6586x_i2c_remove(struct i2c_client *client)
c6c19332	543	{
4b751cf5	544	struct tps6586x *tps6586x = i2c_get_clientdata(client);
4b751cf5	545
7a7487cb LD	546	tps6586x_remove_subdevs(tps6586x);
7a7487cb LD	547	mfd_remove_devices(tps6586x->dev);
c26448c4 GK	548	if (client->irq)
c26448c4 GK	549	free_irq(client->irq, tps6586x);
c6c19332 MR	550	return 0;
	551	}
	552
	553	static const struct i2c_device_id tps6586x_id_table[] = {
	554	{ "tps6586x", 0 },
	555	{ },
	556	};
	557	MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
	558
	559	static struct i2c_driver tps6586x_driver = {
	560	.driver = {
	561	.name = "tps6586x",
	562	.owner = THIS_MODULE,
62f6b087	563	.of_match_table = of_match_ptr(tps6586x_of_match),
c6c19332 MR	564	},
c6c19332 MR	565	.probe = tps6586x_i2c_probe,
84449216	566	.remove = tps6586x_i2c_remove,
c6c19332 MR	567	.id_table = tps6586x_id_table,
	568	};
	569
	570	static int __init tps6586x_init(void)
	571	{
	572	return i2c_add_driver(&tps6586x_driver);
	573	}
	574	subsys_initcall(tps6586x_init);
	575
	576	static void __exit tps6586x_exit(void)
	577	{
	578	i2c_del_driver(&tps6586x_driver);
	579	}
	580	module_exit(tps6586x_exit);
	581
	582	MODULE_DESCRIPTION("TPS6586X core driver");
	583	MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
	584	MODULE_LICENSE("GPL");