1/*
2 * da9063-core.c: Device access for Dialog DA9063 modules
3 *
4 * Copyright 2012 Dialog Semiconductors Ltd.
5 * Copyright 2013 Philipp Zabel, Pengutronix
6 *
7 * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>,
8 *         Michal Hajduk <michal.hajduk@diasemi.com>
9 *
10 *  This program is free software; you can redistribute  it and/or modify it
11 *  under  the terms of  the GNU General  Public License as published by the
12 *  Free Software Foundation;  either version 2 of the  License, or (at your
13 *  option) any later version.
14 *
15 */
16
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/slab.h>
21#include <linux/device.h>
22#include <linux/delay.h>
23#include <linux/interrupt.h>
24#include <linux/mutex.h>
25#include <linux/mfd/core.h>
26#include <linux/regmap.h>
27
28#include <linux/mfd/da9063/core.h>
29#include <linux/mfd/da9063/pdata.h>
30#include <linux/mfd/da9063/registers.h>
31
32#include <linux/proc_fs.h>
33#include <linux/kthread.h>
34#include <linux/uaccess.h>
35
36
37static struct resource da9063_regulators_resources[] = {
38	{
39		.name	= "LDO_LIM",
40		.start	= DA9063_IRQ_LDO_LIM,
41		.end	= DA9063_IRQ_LDO_LIM,
42		.flags	= IORESOURCE_IRQ,
43	},
44};
45
46static struct resource da9063_rtc_resources[] = {
47	{
48		.name	= "ALARM",
49		.start	= DA9063_IRQ_ALARM,
50		.end	= DA9063_IRQ_ALARM,
51		.flags	= IORESOURCE_IRQ,
52	},
53	{
54		.name	= "TICK",
55		.start	= DA9063_IRQ_TICK,
56		.end	= DA9063_IRQ_TICK,
57		.flags	= IORESOURCE_IRQ,
58	}
59};
60
61static struct resource da9063_onkey_resources[] = {
62	{
63		.start	= DA9063_IRQ_ONKEY,
64		.end	= DA9063_IRQ_ONKEY,
65		.flags	= IORESOURCE_IRQ,
66	},
67};
68
69static struct resource da9063_hwmon_resources[] = {
70	{
71		.start	= DA9063_IRQ_ADC_RDY,
72		.end	= DA9063_IRQ_ADC_RDY,
73		.flags	= IORESOURCE_IRQ,
74	},
75};
76
77
78static const struct mfd_cell da9063_devs[] = {
79	{
80		.name		= DA9063_DRVNAME_REGULATORS,
81		.num_resources	= ARRAY_SIZE(da9063_regulators_resources),
82		.resources	= da9063_regulators_resources,
83	},
84	{
85		.name		= DA9063_DRVNAME_LEDS,
86	},
87	{
88		.name		= DA9063_DRVNAME_WATCHDOG,
89		.of_compatible	= "dlg,da9063-watchdog",
90	},
91	{
92		.name		= DA9063_DRVNAME_HWMON,
93		.num_resources	= ARRAY_SIZE(da9063_hwmon_resources),
94		.resources	= da9063_hwmon_resources,
95	},
96	{
97		.name		= DA9063_DRVNAME_ONKEY,
98		.num_resources	= ARRAY_SIZE(da9063_onkey_resources),
99		.resources	= da9063_onkey_resources,
100	},
101	{
102		.name		= DA9063_DRVNAME_RTC,
103		.num_resources	= ARRAY_SIZE(da9063_rtc_resources),
104		.resources	= da9063_rtc_resources,
105		.of_compatible	= "dlg,da9063-rtc",
106	},
107	{
108		.name		= DA9063_DRVNAME_VIBRATION,
109	},
110};
111
112int da9063_device_init(struct da9063 *da9063, unsigned int irq)
113{
114	struct da9063_pdata *pdata = da9063->dev->platform_data;
115	int model, variant_id, variant_code;
116	int ret;
117
118	if (pdata) {
119		da9063->flags = pdata->flags;
120		da9063->irq_base = pdata->irq_base;
121	} else {
122		da9063->flags = 0;
123		da9063->irq_base = -1;
124	}
125	da9063->chip_irq = irq;
126
127	if (pdata && pdata->init != NULL) {
128		ret = pdata->init(da9063);
129		if (ret != 0) {
130			dev_err(da9063->dev,
131				"Platform initialization failed.\n");
132			return ret;
133		}
134	}
135
136	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model);
137	if (ret < 0) {
138		dev_err(da9063->dev, "Cannot read chip model id.\n");
139		return -EIO;
140	}
141	if (model != PMIC_DA9063) {
142		dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model);
143		return -ENODEV;
144	}
145
146	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &variant_id);
147	if (ret < 0) {
148		dev_err(da9063->dev, "Cannot read chip variant id.\n");
149		return -EIO;
150	}
151
152	variant_code = variant_id >> DA9063_CHIP_VARIANT_SHIFT;
153
154	dev_info(da9063->dev,
155		 "Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
156		 model, variant_id);
157
158	if (variant_code < PMIC_DA9063_BB && variant_code != PMIC_DA9063_AD) {
159		dev_err(da9063->dev,
160			"Cannot support variant code: 0x%02X\n", variant_code);
161		return -ENODEV;
162	}
163
164	da9063->model = model;
165	da9063->variant_code = variant_code;
166
167	ret = da9063_irq_init(da9063);
168	if (ret) {
169		dev_err(da9063->dev, "Cannot initialize interrupts.\n");
170		return ret;
171	}
172
173	da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);
174
175	ret = mfd_add_devices(da9063->dev, -1, da9063_devs,
176			      ARRAY_SIZE(da9063_devs), NULL, da9063->irq_base,
177			      NULL);
178	if (ret)
179		dev_err(da9063->dev, "Cannot add MFD cells\n");
180
181	return ret;
182}
183
184void da9063_device_exit(struct da9063 *da9063)
185{
186	mfd_remove_devices(da9063->dev);
187	da9063_irq_exit(da9063);
188}
189
190MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
191MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>, Michal Hajduk <michal.hajduk@diasemi.com>");
192MODULE_LICENSE("GPL");
193