Root/
1 | /* |
2 | * max77686.c - mfd core driver for the Maxim 77686 |
3 | * |
4 | * Copyright (C) 2012 Samsung Electronics |
5 | * Chiwoong Byun <woong.byun@smasung.com> |
6 | * Jonghwa Lee <jonghwa3.lee@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 | * This driver is based on max8997.c |
23 | */ |
24 | |
25 | #include <linux/export.h> |
26 | #include <linux/slab.h> |
27 | #include <linux/i2c.h> |
28 | #include <linux/pm_runtime.h> |
29 | #include <linux/module.h> |
30 | #include <linux/mfd/core.h> |
31 | #include <linux/mfd/max77686.h> |
32 | #include <linux/mfd/max77686-private.h> |
33 | #include <linux/err.h> |
34 | |
35 | #define I2C_ADDR_RTC (0x0C >> 1) |
36 | |
37 | static struct mfd_cell max77686_devs[] = { |
38 | { .name = "max77686-pmic", }, |
39 | { .name = "max77686-rtc", }, |
40 | }; |
41 | |
42 | static struct regmap_config max77686_regmap_config = { |
43 | .reg_bits = 8, |
44 | .val_bits = 8, |
45 | }; |
46 | |
47 | #ifdef CONFIG_OF |
48 | static struct of_device_id max77686_pmic_dt_match[] = { |
49 | {.compatible = "maxim,max77686", .data = 0}, |
50 | {}, |
51 | }; |
52 | |
53 | static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device |
54 | *dev) |
55 | { |
56 | struct max77686_platform_data *pd; |
57 | |
58 | pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); |
59 | if (!pd) { |
60 | dev_err(dev, "could not allocate memory for pdata\n"); |
61 | return NULL; |
62 | } |
63 | |
64 | dev->platform_data = pd; |
65 | return pd; |
66 | } |
67 | #else |
68 | static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device |
69 | *dev) |
70 | { |
71 | return 0; |
72 | } |
73 | #endif |
74 | |
75 | static int max77686_i2c_probe(struct i2c_client *i2c, |
76 | const struct i2c_device_id *id) |
77 | { |
78 | struct max77686_dev *max77686 = NULL; |
79 | struct max77686_platform_data *pdata = i2c->dev.platform_data; |
80 | unsigned int data; |
81 | int ret = 0; |
82 | |
83 | if (i2c->dev.of_node) |
84 | pdata = max77686_i2c_parse_dt_pdata(&i2c->dev); |
85 | |
86 | if (!pdata) { |
87 | ret = -EIO; |
88 | dev_err(&i2c->dev, "No platform data found.\n"); |
89 | goto err; |
90 | } |
91 | |
92 | max77686 = kzalloc(sizeof(struct max77686_dev), GFP_KERNEL); |
93 | if (max77686 == NULL) |
94 | return -ENOMEM; |
95 | |
96 | i2c_set_clientdata(i2c, max77686); |
97 | max77686->dev = &i2c->dev; |
98 | max77686->i2c = i2c; |
99 | max77686->type = id->driver_data; |
100 | |
101 | max77686->wakeup = pdata->wakeup; |
102 | max77686->irq_gpio = pdata->irq_gpio; |
103 | max77686->irq = i2c->irq; |
104 | |
105 | max77686->regmap = regmap_init_i2c(i2c, &max77686_regmap_config); |
106 | if (IS_ERR(max77686->regmap)) { |
107 | ret = PTR_ERR(max77686->regmap); |
108 | dev_err(max77686->dev, "Failed to allocate register map: %d\n", |
109 | ret); |
110 | kfree(max77686); |
111 | return ret; |
112 | } |
113 | |
114 | if (regmap_read(max77686->regmap, |
115 | MAX77686_REG_DEVICE_ID, &data) < 0) { |
116 | dev_err(max77686->dev, |
117 | "device not found on this channel (this is not an error)\n"); |
118 | ret = -ENODEV; |
119 | goto err; |
120 | } else |
121 | dev_info(max77686->dev, "device found\n"); |
122 | |
123 | max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC); |
124 | i2c_set_clientdata(max77686->rtc, max77686); |
125 | |
126 | max77686_irq_init(max77686); |
127 | |
128 | ret = mfd_add_devices(max77686->dev, -1, max77686_devs, |
129 | ARRAY_SIZE(max77686_devs), NULL, 0, NULL); |
130 | |
131 | if (ret < 0) |
132 | goto err_mfd; |
133 | |
134 | return ret; |
135 | |
136 | err_mfd: |
137 | mfd_remove_devices(max77686->dev); |
138 | i2c_unregister_device(max77686->rtc); |
139 | err: |
140 | kfree(max77686); |
141 | return ret; |
142 | } |
143 | |
144 | static int max77686_i2c_remove(struct i2c_client *i2c) |
145 | { |
146 | struct max77686_dev *max77686 = i2c_get_clientdata(i2c); |
147 | |
148 | mfd_remove_devices(max77686->dev); |
149 | i2c_unregister_device(max77686->rtc); |
150 | kfree(max77686); |
151 | |
152 | return 0; |
153 | } |
154 | |
155 | static const struct i2c_device_id max77686_i2c_id[] = { |
156 | { "max77686", TYPE_MAX77686 }, |
157 | { } |
158 | }; |
159 | MODULE_DEVICE_TABLE(i2c, max77686_i2c_id); |
160 | |
161 | static struct i2c_driver max77686_i2c_driver = { |
162 | .driver = { |
163 | .name = "max77686", |
164 | .owner = THIS_MODULE, |
165 | .of_match_table = of_match_ptr(max77686_pmic_dt_match), |
166 | }, |
167 | .probe = max77686_i2c_probe, |
168 | .remove = max77686_i2c_remove, |
169 | .id_table = max77686_i2c_id, |
170 | }; |
171 | |
172 | static int __init max77686_i2c_init(void) |
173 | { |
174 | return i2c_add_driver(&max77686_i2c_driver); |
175 | } |
176 | /* init early so consumer devices can complete system boot */ |
177 | subsys_initcall(max77686_i2c_init); |
178 | |
179 | static void __exit max77686_i2c_exit(void) |
180 | { |
181 | i2c_del_driver(&max77686_i2c_driver); |
182 | } |
183 | module_exit(max77686_i2c_exit); |
184 | |
185 | MODULE_DESCRIPTION("MAXIM 77686 multi-function core driver"); |
186 | MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>"); |
187 | MODULE_LICENSE("GPL"); |
188 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9