xref: /linux/drivers/mfd/da9063-core.c (revision d91517839e5d95adc0cf4b28caa7af62a71de526)
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 
37 static 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 
46 static 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 
61 static struct resource da9063_onkey_resources[] = {
62 	{
63 		.start	= DA9063_IRQ_ONKEY,
64 		.end	= DA9063_IRQ_ONKEY,
65 		.flags	= IORESOURCE_IRQ,
66 	},
67 };
68 
69 static 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 
78 static 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 	},
90 	{
91 		.name		= DA9063_DRVNAME_HWMON,
92 		.num_resources	= ARRAY_SIZE(da9063_hwmon_resources),
93 		.resources	= da9063_hwmon_resources,
94 	},
95 	{
96 		.name		= DA9063_DRVNAME_ONKEY,
97 		.num_resources	= ARRAY_SIZE(da9063_onkey_resources),
98 		.resources	= da9063_onkey_resources,
99 	},
100 	{
101 		.name		= DA9063_DRVNAME_RTC,
102 		.num_resources	= ARRAY_SIZE(da9063_rtc_resources),
103 		.resources	= da9063_rtc_resources,
104 	},
105 	{
106 		.name		= DA9063_DRVNAME_VIBRATION,
107 	},
108 };
109 
110 int da9063_device_init(struct da9063 *da9063, unsigned int irq)
111 {
112 	struct da9063_pdata *pdata = da9063->dev->platform_data;
113 	int model, revision;
114 	int ret;
115 
116 	if (pdata) {
117 		da9063->flags = pdata->flags;
118 		da9063->irq_base = pdata->irq_base;
119 	} else {
120 		da9063->flags = 0;
121 		da9063->irq_base = 0;
122 	}
123 	da9063->chip_irq = irq;
124 
125 	if (pdata && pdata->init != NULL) {
126 		ret = pdata->init(da9063);
127 		if (ret != 0) {
128 			dev_err(da9063->dev,
129 				"Platform initialization failed.\n");
130 			return ret;
131 		}
132 	}
133 
134 	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model);
135 	if (ret < 0) {
136 		dev_err(da9063->dev, "Cannot read chip model id.\n");
137 		return -EIO;
138 	}
139 	if (model != PMIC_DA9063) {
140 		dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model);
141 		return -ENODEV;
142 	}
143 
144 	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &revision);
145 	if (ret < 0) {
146 		dev_err(da9063->dev, "Cannot read chip revision id.\n");
147 		return -EIO;
148 	}
149 	revision >>= DA9063_CHIP_VARIANT_SHIFT;
150 	if (revision != 3) {
151 		dev_err(da9063->dev, "Unknown chip revision: %d\n", revision);
152 		return -ENODEV;
153 	}
154 
155 	da9063->model = model;
156 	da9063->revision = revision;
157 
158 	dev_info(da9063->dev,
159 		 "Device detected (model-ID: 0x%02X  rev-ID: 0x%02X)\n",
160 		 model, revision);
161 
162 	ret = da9063_irq_init(da9063);
163 	if (ret) {
164 		dev_err(da9063->dev, "Cannot initialize interrupts.\n");
165 		return ret;
166 	}
167 
168 	ret = mfd_add_devices(da9063->dev, -1, da9063_devs,
169 			      ARRAY_SIZE(da9063_devs), NULL, da9063->irq_base,
170 			      NULL);
171 	if (ret)
172 		dev_err(da9063->dev, "Cannot add MFD cells\n");
173 
174 	return ret;
175 }
176 
177 void da9063_device_exit(struct da9063 *da9063)
178 {
179 	mfd_remove_devices(da9063->dev);
180 	da9063_irq_exit(da9063);
181 }
182 
183 MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
184 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>, Michal Hajduk <michal.hajduk@diasemi.com>");
185 MODULE_LICENSE("GPL");
186