mfd: add base support for Dialog DA9030/DA9034 PMICs

DA9030 (a.k.a ARAVA) and DA9034 (a.k.a MICCO) are PMICs designed by
Dialog Semiconductor, usually found on PXA-based platforms. These
PMICs are I2C-based, multi-function devices, usually with LEDs, PWMs
for backlight, BUCKs and LDOs, ADCs and touchscreen controller (on
DA9034).

This is the base support for the I2C operations, event registration
and handling, sub-devices management.
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Liam Girdwood <lrg@kernel.org>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>

drivers/mfd/da903x.c

+/*
+ * Base driver for Dialog Semiconductor DA9030/DA9034
+ *
+ * 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/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/mfd/da903x.h>
+
+#define DA9030_CHIP_ID		0x00
+#define DA9030_EVENT_A		0x01
+#define DA9030_EVENT_B		0x02
+#define DA9030_EVENT_C		0x03
+#define DA9030_STATUS		0x04
+#define DA9030_IRQ_MASK_A	0x05
+#define DA9030_IRQ_MASK_B	0x06
+#define DA9030_IRQ_MASK_C	0x07
+#define DA9030_SYS_CTRL_A	0x08
+#define DA9030_SYS_CTRL_B	0x09
+#define DA9030_FAULT_LOG	0x0a
+
+#define DA9034_CHIP_ID		0x00
+#define DA9034_EVENT_A		0x01
+#define DA9034_EVENT_B		0x02
+#define DA9034_EVENT_C		0x03
+#define DA9034_EVENT_D		0x04
+#define DA9034_STATUS_A		0x05
+#define DA9034_STATUS_B		0x06
+#define DA9034_IRQ_MASK_A	0x07
+#define DA9034_IRQ_MASK_B	0x08
+#define DA9034_IRQ_MASK_C	0x09
+#define DA9034_IRQ_MASK_D	0x0a
+#define DA9034_SYS_CTRL_A	0x0b
+#define DA9034_SYS_CTRL_B	0x0c
+#define DA9034_FAULT_LOG	0x0d
+
+struct da903x_chip;
+
+struct da903x_chip_ops {
+	int	(*init_chip)(struct da903x_chip *);
+	int	(*unmask_events)(struct da903x_chip *, unsigned int events);
+	int	(*mask_events)(struct da903x_chip *, unsigned int events);
+	int	(*read_events)(struct da903x_chip *, unsigned int *events);
+	int	(*read_status)(struct da903x_chip *, unsigned int *status);
+};
+
+struct da903x_chip {
+	struct i2c_client	*client;
+	struct device		*dev;
+	struct da903x_chip_ops	*ops;
+
+	int			type;
+	uint32_t		events_mask;
+
+	struct mutex		lock;
+	struct work_struct	irq_work;
+
+	struct blocking_notifier_head notifier_list;
+};
+
+static inline int __da903x_read(struct i2c_client *client,
+				int reg, uint8_t *val)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(client, reg);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
+		return ret;
+	}
+
+	*val = (uint8_t)ret;
+	return 0;
+}
+
+static inline int __da903x_reads(struct i2c_client *client, int reg,
+				 int len, uint8_t *val)
+{
+	int ret;
+
+	ret = i2c_smbus_read_i2c_block_data(client, reg, len, val);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed reading from 0x%02x\n", reg);
+		return ret;
+	}
+	return 0;
+}
+
+static inline int __da903x_write(struct i2c_client *client,
+				 int reg, uint8_t val)
+{
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(client, reg, val);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
+				val, reg);
+		return ret;
+	}
+	return 0;
+}
+
+static inline int __da903x_writes(struct i2c_client *client, int reg,
+				  int len, uint8_t *val)
+{
+	int ret;
+
+	ret = i2c_smbus_write_i2c_block_data(client, reg, len, val);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed writings to 0x%02x\n", reg);
+		return ret;
+	}
+	return 0;
+}
+
+int da903x_register_notifier(struct device *dev, struct notifier_block *nb,
+				unsigned int events)
+{
+	struct da903x_chip *chip = dev_get_drvdata(dev);
+
+	chip->ops->unmask_events(chip, events);
+	return blocking_notifier_chain_register(&chip->notifier_list, nb);
+}
+EXPORT_SYMBOL_GPL(da903x_register_notifier);
+
+int da903x_unregister_notifier(struct device *dev, struct notifier_block *nb,
+				unsigned int events)
+{
+	struct da903x_chip *chip = dev_get_drvdata(dev);
+
+	chip->ops->mask_events(chip, events);
+	return blocking_notifier_chain_unregister(&chip->notifier_list, nb);
+}
+EXPORT_SYMBOL_GPL(da903x_unregister_notifier);
+
+int da903x_write(struct device *dev, int reg, uint8_t val)
+{
+	return __da903x_write(to_i2c_client(dev), reg, val);
+}
+EXPORT_SYMBOL_GPL(da903x_write);
+
+int da903x_read(struct device *dev, int reg, uint8_t *val)
+{
+	return __da903x_read(to_i2c_client(dev), reg, val);
+}
+EXPORT_SYMBOL_GPL(da903x_read);
+
+int da903x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
+{
+	struct da903x_chip *chip = dev_get_drvdata(dev);
+	uint8_t reg_val;
+	int ret = 0;
+
+	mutex_lock(&chip->lock);
+
+	ret = __da903x_read(chip->client, reg, &reg_val);
+	if (ret)
+		goto out;
+
+	if ((reg_val & bit_mask) == 0) {
+		reg_val |= bit_mask;
+		ret = __da903x_write(chip->client, reg, reg_val);
+	}
+out:
+	mutex_unlock(&chip->lock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(da903x_set_bits);
+
+int da903x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
+{
+	struct da903x_chip *chip = dev_get_drvdata(dev);
+	uint8_t reg_val;
+	int ret = 0;
+
+	mutex_lock(&chip->lock);
+
+	ret = __da903x_read(chip->client, reg, &reg_val);
+	if (ret)
+		goto out;
+
+	if (reg_val & bit_mask) {
+		reg_val &= ~bit_mask;
+		ret = __da903x_write(chip->client, reg, reg_val);
+	}
+out:
+	mutex_unlock(&chip->lock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(da903x_clr_bits);
+
+int da903x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
+{
+	struct da903x_chip *chip = dev_get_drvdata(dev);
+	uint8_t reg_val;
+	int ret = 0;
+
+	mutex_lock(&chip->lock);
+
+	ret = __da903x_read(chip->client, reg, &reg_val);
+	if (ret)
+		goto out;
+
+	if ((reg_val & mask) != val) {
+		reg_val = (reg_val & ~mask) | val;
+		ret = __da903x_write(chip->client, reg, reg_val);
+	}
+out:
+	mutex_unlock(&chip->lock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(da903x_update);
+
+int da903x_query_status(struct device *dev, unsigned int sbits)
+{
+	struct da903x_chip *chip = dev_get_drvdata(dev);
+	unsigned int status = 0;
+
+	chip->ops->read_status(chip, &status);
+	return ((status & sbits) == sbits);
+}
+EXPORT_SYMBOL(da903x_query_status);
+
+static int __devinit da9030_init_chip(struct da903x_chip *chip)
+{
+	uint8_t chip_id;
+	int err;
+
+	err = __da903x_read(chip->client, DA9030_CHIP_ID, &chip_id);
+	if (err)
+		return err;
+
+	err = __da903x_write(chip->client, DA9030_SYS_CTRL_A, 0xE8);
+	if (err)
+		return err;
+
+	dev_info(chip->dev, "DA9030 (CHIP ID: 0x%02x) detected\n", chip_id);
+	return 0;
+}
+
+static int da9030_unmask_events(struct da903x_chip *chip, unsigned int events)
+{
+	uint8_t v[3];
+
+	chip->events_mask &= ~events;
+
+	v[0] = (chip->events_mask & 0xff);
+	v[1] = (chip->events_mask >> 8) & 0xff;
+	v[2] = (chip->events_mask >> 16) & 0xff;
+
+	return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v);
+}
+
+static int da9030_mask_events(struct da903x_chip *chip, unsigned int events)
+{
+	uint8_t v[3];
+
+	chip->events_mask &= ~events;
+
+	v[0] = (chip->events_mask & 0xff);
+	v[1] = (chip->events_mask >> 8) & 0xff;
+	v[2] = (chip->events_mask >> 16) & 0xff;
+
+	return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v);
+}
+
+static int da9030_read_events(struct da903x_chip *chip, unsigned int *events)
+{
+	uint8_t v[3] = {0, 0, 0};
+	int ret;
+
+	ret = __da903x_reads(chip->client, DA9030_EVENT_A, 3, v);
+	if (ret < 0)
+		return ret;
+
+	*events = (v[2] << 16) | (v[1] << 8) | v[0];
+	return 0;
+}
+
+static int da9030_read_status(struct da903x_chip *chip, unsigned int *status)
+{
+	return __da903x_read(chip->client, DA9030_STATUS, (uint8_t *)status);
+}
+
+static int da9034_init_chip(struct da903x_chip *chip)
+{
+	uint8_t chip_id;
+	int err;
+
+	err = __da903x_read(chip->client, DA9034_CHIP_ID, &chip_id);
+	if (err)
+		return err;
+
+	err = __da903x_write(chip->client, DA9034_SYS_CTRL_A, 0xE8);
+	if (err)
+		return err;
+
+	/* avoid SRAM power off during sleep*/
+	__da903x_write(chip->client, 0x10, 0x07);
+	__da903x_write(chip->client, 0x11, 0xff);
+	__da903x_write(chip->client, 0x12, 0xff);
+
+	/* Enable the ONKEY power down functionality */
+	__da903x_write(chip->client, DA9034_SYS_CTRL_B, 0x20);
+	__da903x_write(chip->client, DA9034_SYS_CTRL_A, 0x60);
+
+	/* workaround to make LEDs work */
+	__da903x_write(chip->client, 0x90, 0x01);
+	__da903x_write(chip->client, 0xB0, 0x08);
+
+	/* make ADTV1 and SDTV1 effective */
+	__da903x_write(chip->client, 0x20, 0x00);
+
+	dev_info(chip->dev, "DA9034 (CHIP ID: 0x%02x) detected\n", chip_id);
+	return 0;
+}
+
+static int da9034_unmask_events(struct da903x_chip *chip, unsigned int events)
+{
+	uint8_t v[4];
+
+	chip->events_mask &= ~events;
+
+	v[0] = (chip->events_mask & 0xff);
+	v[1] = (chip->events_mask >> 8) & 0xff;
+	v[2] = (chip->events_mask >> 16) & 0xff;
+	v[3] = (chip->events_mask >> 24) & 0xff;
+
+	return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v);
+}
+
+static int da9034_mask_events(struct da903x_chip *chip, unsigned int events)
+{
+	uint8_t v[4];
+
+	chip->events_mask |= events;
+
+	v[0] = (chip->events_mask & 0xff);
+	v[1] = (chip->events_mask >> 8) & 0xff;
+	v[2] = (chip->events_mask >> 16) & 0xff;
+	v[3] = (chip->events_mask >> 24) & 0xff;
+
+	return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v);
+}
+
+static int da9034_read_events(struct da903x_chip *chip, unsigned int *events)
+{
+	uint8_t v[4] = {0, 0, 0, 0};
+	int ret;
+
+	ret = __da903x_reads(chip->client, DA9034_EVENT_A, 4, v);
+	if (ret < 0)
+		return ret;
+
+	*events = (v[3] << 24) | (v[2] << 16) | (v[1] << 8) | v[0];
+	return 0;
+}
+
+static int da9034_read_status(struct da903x_chip *chip, unsigned int *status)
+{
+	uint8_t v[2] = {0, 0};
+	int ret = 0;
+
+	ret = __da903x_reads(chip->client, DA9034_STATUS_A, 2, v);
+	if (ret)
+		return ret;
+
+	*status = (v[1] << 8) | v[0];
+	return 0;
+}
+
+static void da903x_irq_work(struct work_struct *work)
+{
+	struct da903x_chip *chip =
+		container_of(work, struct da903x_chip, irq_work);
+	unsigned int events = 0;
+
+	while (1) {
+		if (chip->ops->read_events(chip, &events))
+			break;
+
+		events &= ~chip->events_mask;
+		if (events == 0)
+			break;
+
+		blocking_notifier_call_chain(
+				&chip->notifier_list, events, NULL);
+	}
+	enable_irq(chip->client->irq);
+}
+
+static int da903x_irq_handler(int irq, void *data)
+{
+	struct da903x_chip *chip = data;
+
+	disable_irq_nosync(irq);
+	(void)schedule_work(&chip->irq_work);
+
+	return IRQ_HANDLED;
+}
+
+static struct da903x_chip_ops da903x_ops[] = {
+	[0] = {
+		.init_chip	= da9030_init_chip,
+		.unmask_events	= da9030_unmask_events,
+		.mask_events	= da9030_mask_events,
+		.read_events	= da9030_read_events,
+		.read_status	= da9030_read_status,
+	},
+	[1] = {
+		.init_chip	= da9034_init_chip,
+		.unmask_events	= da9034_unmask_events,
+		.mask_events	= da9034_mask_events,
+		.read_events	= da9034_read_events,
+		.read_status	= da9034_read_status,
+	}
+};
+
+static const struct i2c_device_id da903x_id_table[] = {
+	{ "da9030", 0 },
+	{ "da9034", 1 },
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, da903x_id_table);
+
+static int __devexit __remove_subdev(struct device *dev, void *unused)
+{
+	platform_device_unregister(to_platform_device(dev));
+	return 0;
+}
+
+static int __devexit da903x_remove_subdevs(struct da903x_chip *chip)
+{
+	return device_for_each_child(chip->dev, NULL, __remove_subdev);
+}
+
+static int __devinit da903x_add_subdevs(struct da903x_chip *chip,
+					struct da903x_platform_data *pdata)
+{
+	struct da903x_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);
+
+		pdev->dev.parent = chip->dev;
+		pdev->dev.platform_data = subdev->platform_data;
+
+		ret = platform_device_add(pdev);
+		if (ret)
+			goto failed;
+	}
+	return 0;
+
+failed:
+	da903x_remove_subdevs(chip);
+	return ret;
+}
+
+static int __devinit da903x_probe(struct i2c_client *client,
+				  const struct i2c_device_id *id)
+{
+	struct da903x_platform_data *pdata = client->dev.platform_data;
+	struct da903x_chip *chip;
+	unsigned int tmp;
+	int ret;
+
+	chip = kzalloc(sizeof(struct da903x_chip), GFP_KERNEL);
+	if (chip == NULL)
+		return -ENOMEM;
+
+	chip->client = client;
+	chip->dev = &client->dev;
+	chip->ops = &da903x_ops[id->driver_data];
+
+	mutex_init(&chip->lock);
+	INIT_WORK(&chip->irq_work, da903x_irq_work);
+	BLOCKING_INIT_NOTIFIER_HEAD(&chip->notifier_list);
+
+	i2c_set_clientdata(client, chip);
+
+	ret = chip->ops->init_chip(chip);
+	if (ret)
+		goto out_free_chip;
+
+	/* mask and clear all IRQs */
+	chip->events_mask = 0xffffffff;
+	chip->ops->mask_events(chip, chip->events_mask);
+	chip->ops->read_events(chip, &tmp);
+
+	ret = request_irq(client->irq, da903x_irq_handler,
+			IRQF_DISABLED | IRQF_TRIGGER_FALLING,
+			"da903x", chip);
+	if (ret) {
+		dev_err(&client->dev, "failed to request irq %d\n",
+				client->irq);
+		goto out_free_chip;
+	}
+
+	ret = da903x_add_subdevs(chip, pdata);
+	if (ret)
+		goto out_free_irq;
+
+	return 0;
+
+out_free_irq:
+	free_irq(client->irq, chip);
+out_free_chip:
+	i2c_set_clientdata(client, NULL);
+	kfree(chip);
+	return ret;
+}
+
+static int __devexit da903x_remove(struct i2c_client *client)
+{
+	struct da903x_chip *chip = i2c_get_clientdata(client);
+
+	da903x_remove_subdevs(chip);
+	kfree(chip);
+	return 0;
+}
+
+static struct i2c_driver da903x_driver = {
+	.driver	= {
+		.name	= "da903x",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= da903x_probe,
+	.remove		= __devexit_p(da903x_remove),
+	.id_table	= da903x_id_table,
+};
+
+static int __init da903x_init(void)
+{
+	return i2c_add_driver(&da903x_driver);
+}
+module_init(da903x_init);
+
+static void __exit da903x_exit(void)
+{
+	i2c_del_driver(&da903x_driver);
+}
+module_exit(da903x_exit);
+
+MODULE_DESCRIPTION("PMIC Driver for Dialog Semiconductor DA9034");
+MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
+	      "Mike Rapoport <mike@compulab.co.il>");
+MODULE_LICENSE("GPL");

include/linux/mfd/da903x.h

+#ifndef __LINUX_PMIC_DA903X_H
+#define __LINUX_PMIC_DA903X_H
+
+/* Unified sub device IDs for DA9030/DA9034 */
+enum {
+	DA9030_ID_LED_1,
+	DA9030_ID_LED_2,
+	DA9030_ID_LED_3,
+	DA9030_ID_LED_4,
+	DA9030_ID_LED_PC,
+	DA9030_ID_VIBRA,
+	DA9030_ID_WLED,
+	DA9030_ID_BUCK1,
+	DA9030_ID_BUCK2,
+	DA9030_ID_LDO1,
+	DA9030_ID_LDO2,
+	DA9030_ID_LDO3,
+	DA9030_ID_LDO4,
+	DA9030_ID_LDO5,
+	DA9030_ID_LDO6,
+	DA9030_ID_LDO7,
+	DA9030_ID_LDO8,
+	DA9030_ID_LDO9,
+	DA9030_ID_LDO10,
+	DA9030_ID_LDO11,
+	DA9030_ID_LDO12,
+	DA9030_ID_LDO13,
+	DA9030_ID_LDO14,
+	DA9030_ID_LDO15,
+	DA9030_ID_LDO16,
+	DA9030_ID_LDO17,
+	DA9030_ID_LDO18,
+	DA9030_ID_LDO19,
+	DA9030_ID_LDO_INT,	/* LDO Internal */
+
+	DA9034_ID_LED_1,
+	DA9034_ID_LED_2,
+	DA9034_ID_VIBRA,
+	DA9034_ID_WLED,
+	DA9034_ID_TOUCH,
+
+	DA9034_ID_BUCK1,
+	DA9034_ID_BUCK2,
+	DA9034_ID_LDO1,
+	DA9034_ID_LDO2,
+	DA9034_ID_LDO3,
+	DA9034_ID_LDO4,
+	DA9034_ID_LDO5,
+	DA9034_ID_LDO6,
+	DA9034_ID_LDO7,
+	DA9034_ID_LDO8,
+	DA9034_ID_LDO9,
+	DA9034_ID_LDO10,
+	DA9034_ID_LDO11,
+	DA9034_ID_LDO12,
+	DA9034_ID_LDO13,
+	DA9034_ID_LDO14,
+	DA9034_ID_LDO15,
+};
+
+/*
+ * DA9030/DA9034 LEDs sub-devices uses generic "struct led_info"
+ * as the platform_data
+ */
+
+/* DA9030 flags for "struct led_info"
+ */
+#define DA9030_LED_RATE_ON	(0 << 5)
+#define DA9030_LED_RATE_052S	(1 << 5)
+#define DA9030_LED_DUTY_1_16	(0 << 3)
+#define DA9030_LED_DUTY_1_8	(1 << 3)
+#define DA9030_LED_DUTY_1_4	(2 << 3)
+#define DA9030_LED_DUTY_1_2	(3 << 3)
+
+#define DA9030_VIBRA_MODE_1P3V	(0 << 1)
+#define DA9030_VIBRA_MODE_2P7V	(1 << 1)
+#define DA9030_VIBRA_FREQ_1HZ	(0 << 2)
+#define DA9030_VIBRA_FREQ_2HZ	(1 << 2)
+#define DA9030_VIBRA_FREQ_4HZ	(2 << 2)
+#define DA9030_VIBRA_FREQ_8HZ	(3 << 2)
+#define DA9030_VIBRA_DUTY_ON	(0 << 4)
+#define DA9030_VIBRA_DUTY_75P	(1 << 4)
+#define DA9030_VIBRA_DUTY_50P	(2 << 4)
+#define DA9030_VIBRA_DUTY_25P	(3 << 4)
+
+/* DA9034 flags for "struct led_info" */
+#define DA9034_LED_RAMP		(1 << 7)
+
+/* DA9034 touch screen platform data */
+struct da9034_touch_pdata {
+	int	interval_ms;	/* sampling interval while pen down */
+	int	x_inverted;
+	int	y_inverted;
+};
+
+struct da903x_subdev_info {
+	int		id;
+	const char	*name;
+	void		*platform_data;
+};
+
+struct da903x_platform_data {
+	int num_subdevs;
+	struct da903x_subdev_info *subdevs;
+};
+
+/* bit definitions for DA9030 events */
+#define DA9030_EVENT_ONKEY		(1 << 0)
+#define	DA9030_EVENT_PWREN		(1 << 1)
+#define	DA9030_EVENT_EXTON		(1 << 2)
+#define	DA9030_EVENT_CHDET		(1 << 3)
+#define	DA9030_EVENT_TBAT		(1 << 4)
+#define	DA9030_EVENT_VBATMON		(1 << 5)
+#define	DA9030_EVENT_VBATMON_TXON	(1 << 6)
+#define	DA9030_EVENT_CHIOVER		(1 << 7)
+#define	DA9030_EVENT_TCTO		(1 << 8)
+#define	DA9030_EVENT_CCTO		(1 << 9)
+#define	DA9030_EVENT_ADC_READY		(1 << 10)
+#define	DA9030_EVENT_VBUS_4P4		(1 << 11)
+#define	DA9030_EVENT_VBUS_4P0		(1 << 12)
+#define	DA9030_EVENT_SESS_VALID		(1 << 13)
+#define	DA9030_EVENT_SRP_DETECT		(1 << 14)
+#define	DA9030_EVENT_WATCHDOG		(1 << 15)
+#define	DA9030_EVENT_LDO15		(1 << 16)
+#define	DA9030_EVENT_LDO16		(1 << 17)
+#define	DA9030_EVENT_LDO17		(1 << 18)
+#define	DA9030_EVENT_LDO18		(1 << 19)
+#define	DA9030_EVENT_LDO19		(1 << 20)
+#define	DA9030_EVENT_BUCK2		(1 << 21)
+
+/* bit definitions for DA9034 events */
+#define DA9034_EVENT_ONKEY		(1 << 0)
+#define DA9034_EVENT_EXTON		(1 << 2)
+#define DA9034_EVENT_CHDET		(1 << 3)
+#define DA9034_EVENT_TBAT		(1 << 4)
+#define DA9034_EVENT_VBATMON		(1 << 5)
+#define DA9034_EVENT_REV_IOVER		(1 << 6)
+#define DA9034_EVENT_CH_IOVER		(1 << 7)
+#define DA9034_EVENT_CH_TCTO		(1 << 8)
+#define DA9034_EVENT_CH_CCTO		(1 << 9)
+#define DA9034_EVENT_USB_DEV		(1 << 10)
+#define DA9034_EVENT_OTGCP_IOVER	(1 << 11)
+#define DA9034_EVENT_VBUS_4P55		(1 << 12)
+#define DA9034_EVENT_VBUS_3P8		(1 << 13)
+#define DA9034_EVENT_SESS_1P8		(1 << 14)
+#define DA9034_EVENT_SRP_READY		(1 << 15)
+#define DA9034_EVENT_ADC_MAN		(1 << 16)
+#define DA9034_EVENT_ADC_AUTO4		(1 << 17)
+#define DA9034_EVENT_ADC_AUTO5		(1 << 18)
+#define DA9034_EVENT_ADC_AUTO6		(1 << 19)
+#define DA9034_EVENT_PEN_DOWN		(1 << 20)
+#define DA9034_EVENT_TSI_READY		(1 << 21)
+#define DA9034_EVENT_UART_TX		(1 << 22)
+#define DA9034_EVENT_UART_RX		(1 << 23)
+#define DA9034_EVENT_HEADSET		(1 << 25)
+#define DA9034_EVENT_HOOKSWITCH		(1 << 26)
+#define DA9034_EVENT_WATCHDOG		(1 << 27)
+
+extern int da903x_register_notifier(struct device *dev,
+		struct notifier_block *nb, unsigned int events);
+extern int da903x_unregister_notifier(struct device *dev,
+		struct notifier_block *nb, unsigned int events);
+
+/* Status Query Interface */
+#define DA9030_STATUS_ONKEY		(1 << 0)
+#define DA9030_STATUS_PWREN1		(1 << 1)
+#define DA9030_STATUS_EXTON		(1 << 2)
+#define DA9030_STATUS_CHDET		(1 << 3)
+#define DA9030_STATUS_TBAT		(1 << 4)
+#define DA9030_STATUS_VBATMON		(1 << 5)
+#define DA9030_STATUS_VBATMON_TXON	(1 << 6)
+#define DA9030_STATUS_MCLKDET		(1 << 7)
+
+#define DA9034_STATUS_ONKEY		(1 << 0)
+#define DA9034_STATUS_EXTON		(1 << 2)
+#define DA9034_STATUS_CHDET		(1 << 3)
+#define DA9034_STATUS_TBAT		(1 << 4)
+#define DA9034_STATUS_VBATMON		(1 << 5)
+#define DA9034_STATUS_PEN_DOWN		(1 << 6)
+#define DA9034_STATUS_MCLKDET		(1 << 7)
+#define DA9034_STATUS_USB_DEV		(1 << 8)
+#define DA9034_STATUS_HEADSET		(1 << 9)
+#define DA9034_STATUS_HOOKSWITCH	(1 << 10)
+#define DA9034_STATUS_REMCON		(1 << 11)
+#define DA9034_STATUS_VBUS_VALID_4P55	(1 << 12)
+#define DA9034_STATUS_VBUS_VALID_3P8	(1 << 13)
+#define DA9034_STATUS_SESS_VALID_1P8	(1 << 14)
+#define DA9034_STATUS_SRP_READY		(1 << 15)
+
+extern int da903x_query_status(struct device *dev, unsigned int status);
+
+
+/* NOTE: the two functions below are not intended for use outside
+ * of the DA9034 sub-device drivers
+ */
+extern int da903x_write(struct device *dev, int reg, uint8_t val);
+extern int da903x_read(struct device *dev, int reg, uint8_t *val);
+extern int da903x_update(struct device *dev, int reg, uint8_t val, uint8_t mask);
+extern int da903x_set_bits(struct device *dev, int reg, uint8_t bit_mask);
+extern int da903x_clr_bits(struct device *dev, int reg, uint8_t bit_mask);
+#endif /* __LINUX_PMIC_DA903X_H */