Commit | Line | Data |
---|---|---|
156f2528 | 1 | /* |
2c7e6f57 | 2 | * max8998.c - mfd core driver for the Maxim 8998 |
156f2528 KP |
3 | * |
4 | * Copyright (C) 2009-2010 Samsung Electronics | |
5 | * Kyungmin Park <kyungmin.park@samsung.com> | |
6 | * Marek Szyprowski <m.szyprowski@samsung.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/moduleparam.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/i2c.h> | |
28 | #include <linux/mutex.h> | |
29 | #include <linux/mfd/core.h> | |
30 | #include <linux/mfd/max8998.h> | |
31 | #include <linux/mfd/max8998-private.h> | |
32 | ||
9b16c0a4 JS |
33 | #define RTC_I2C_ADDR (0x0c >> 1) |
34 | ||
156f2528 KP |
35 | static struct mfd_cell max8998_devs[] = { |
36 | { | |
37 | .name = "max8998-pmic", | |
9b16c0a4 JS |
38 | }, { |
39 | .name = "max8998-rtc", | |
40 | }, | |
156f2528 KP |
41 | }; |
42 | ||
676e02d7 | 43 | int max8998_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest) |
156f2528 | 44 | { |
676e02d7 | 45 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); |
156f2528 KP |
46 | int ret; |
47 | ||
48 | mutex_lock(&max8998->iolock); | |
676e02d7 | 49 | ret = i2c_smbus_read_byte_data(i2c, reg); |
156f2528 KP |
50 | mutex_unlock(&max8998->iolock); |
51 | if (ret < 0) | |
52 | return ret; | |
53 | ||
54 | ret &= 0xff; | |
55 | *dest = ret; | |
56 | return 0; | |
57 | } | |
676e02d7 | 58 | EXPORT_SYMBOL(max8998_read_reg); |
156f2528 | 59 | |
2c7e6f57 JS |
60 | int max8998_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf) |
61 | { | |
62 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); | |
63 | int ret; | |
64 | ||
65 | mutex_lock(&max8998->iolock); | |
66 | ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf); | |
67 | mutex_unlock(&max8998->iolock); | |
68 | if (ret < 0) | |
69 | return ret; | |
70 | ||
71 | return 0; | |
72 | } | |
73 | EXPORT_SYMBOL(max8998_bulk_read); | |
74 | ||
676e02d7 | 75 | int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value) |
156f2528 | 76 | { |
676e02d7 | 77 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); |
156f2528 KP |
78 | int ret; |
79 | ||
80 | mutex_lock(&max8998->iolock); | |
676e02d7 | 81 | ret = i2c_smbus_write_byte_data(i2c, reg, value); |
156f2528 KP |
82 | mutex_unlock(&max8998->iolock); |
83 | return ret; | |
84 | } | |
676e02d7 | 85 | EXPORT_SYMBOL(max8998_write_reg); |
156f2528 | 86 | |
9b16c0a4 JS |
87 | int max8998_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf) |
88 | { | |
89 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); | |
90 | int ret; | |
91 | ||
92 | mutex_lock(&max8998->iolock); | |
93 | ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf); | |
94 | mutex_unlock(&max8998->iolock); | |
95 | if (ret < 0) | |
96 | return ret; | |
97 | ||
98 | return 0; | |
99 | } | |
100 | EXPORT_SYMBOL(max8998_bulk_write); | |
101 | ||
676e02d7 | 102 | int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask) |
156f2528 | 103 | { |
676e02d7 | 104 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); |
156f2528 KP |
105 | int ret; |
106 | ||
107 | mutex_lock(&max8998->iolock); | |
676e02d7 | 108 | ret = i2c_smbus_read_byte_data(i2c, reg); |
156f2528 KP |
109 | if (ret >= 0) { |
110 | u8 old_val = ret & 0xff; | |
111 | u8 new_val = (val & mask) | (old_val & (~mask)); | |
676e02d7 | 112 | ret = i2c_smbus_write_byte_data(i2c, reg, new_val); |
156f2528 KP |
113 | } |
114 | mutex_unlock(&max8998->iolock); | |
115 | return ret; | |
116 | } | |
676e02d7 | 117 | EXPORT_SYMBOL(max8998_update_reg); |
156f2528 KP |
118 | |
119 | static int max8998_i2c_probe(struct i2c_client *i2c, | |
120 | const struct i2c_device_id *id) | |
121 | { | |
2c7e6f57 | 122 | struct max8998_platform_data *pdata = i2c->dev.platform_data; |
156f2528 KP |
123 | struct max8998_dev *max8998; |
124 | int ret = 0; | |
125 | ||
126 | max8998 = kzalloc(sizeof(struct max8998_dev), GFP_KERNEL); | |
8f1f151e | 127 | if (max8998 == NULL) |
156f2528 | 128 | return -ENOMEM; |
156f2528 KP |
129 | |
130 | i2c_set_clientdata(i2c, max8998); | |
131 | max8998->dev = &i2c->dev; | |
676e02d7 | 132 | max8998->i2c = i2c; |
2c7e6f57 | 133 | max8998->irq = i2c->irq; |
509bd476 | 134 | max8998->type = id->driver_data; |
2c7e6f57 JS |
135 | if (pdata) { |
136 | max8998->ono = pdata->ono; | |
137 | max8998->irq_base = pdata->irq_base; | |
138 | } | |
156f2528 KP |
139 | mutex_init(&max8998->iolock); |
140 | ||
9b16c0a4 JS |
141 | max8998->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); |
142 | i2c_set_clientdata(max8998->rtc, max8998); | |
143 | ||
2c7e6f57 JS |
144 | max8998_irq_init(max8998); |
145 | ||
156f2528 KP |
146 | ret = mfd_add_devices(max8998->dev, -1, |
147 | max8998_devs, ARRAY_SIZE(max8998_devs), | |
148 | NULL, 0); | |
149 | if (ret < 0) | |
150 | goto err; | |
151 | ||
152 | return ret; | |
153 | ||
154 | err: | |
155 | mfd_remove_devices(max8998->dev); | |
7484552e AL |
156 | max8998_irq_exit(max8998); |
157 | i2c_unregister_device(max8998->rtc); | |
156f2528 KP |
158 | kfree(max8998); |
159 | return ret; | |
160 | } | |
161 | ||
162 | static int max8998_i2c_remove(struct i2c_client *i2c) | |
163 | { | |
164 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); | |
165 | ||
166 | mfd_remove_devices(max8998->dev); | |
7484552e AL |
167 | max8998_irq_exit(max8998); |
168 | i2c_unregister_device(max8998->rtc); | |
156f2528 KP |
169 | kfree(max8998); |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static const struct i2c_device_id max8998_i2c_id[] = { | |
509bd476 LM |
175 | { "max8998", TYPE_MAX8998 }, |
176 | { "lp3974", TYPE_LP3974}, | |
f8539ddc | 177 | { } |
156f2528 KP |
178 | }; |
179 | MODULE_DEVICE_TABLE(i2c, max8998_i2c_id); | |
180 | ||
181 | static struct i2c_driver max8998_i2c_driver = { | |
182 | .driver = { | |
183 | .name = "max8998", | |
184 | .owner = THIS_MODULE, | |
185 | }, | |
186 | .probe = max8998_i2c_probe, | |
187 | .remove = max8998_i2c_remove, | |
188 | .id_table = max8998_i2c_id, | |
189 | }; | |
190 | ||
191 | static int __init max8998_i2c_init(void) | |
192 | { | |
193 | return i2c_add_driver(&max8998_i2c_driver); | |
194 | } | |
195 | /* init early so consumer devices can complete system boot */ | |
196 | subsys_initcall(max8998_i2c_init); | |
197 | ||
198 | static void __exit max8998_i2c_exit(void) | |
199 | { | |
200 | i2c_del_driver(&max8998_i2c_driver); | |
201 | } | |
202 | module_exit(max8998_i2c_exit); | |
203 | ||
204 | MODULE_DESCRIPTION("MAXIM 8998 multi-function core driver"); | |
205 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); | |
206 | MODULE_LICENSE("GPL"); |