xref: /openbmc/linux/drivers/mfd/da9063-core.c (revision d7a3d85e)
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 		.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 
112 int 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 
184 void da9063_device_exit(struct da9063 *da9063)
185 {
186 	mfd_remove_devices(da9063->dev);
187 	da9063_irq_exit(da9063);
188 }
189 
190 MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
191 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>, Michal Hajduk <michal.hajduk@diasemi.com>");
192 MODULE_LICENSE("GPL");
193