drm/qxl: add support for > 1 output
[linux-2.6.git] / drivers / mfd / sec-core.c
blob77ee26ef594176aceb8b5d8a2518b5eb13f64479
1 /*
2 * sec-core.c
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd
5 * http://www.samsung.com
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/err.h>
18 #include <linux/slab.h>
19 #include <linux/i2c.h>
20 #include <linux/of_irq.h>
21 #include <linux/interrupt.h>
22 #include <linux/pm_runtime.h>
23 #include <linux/mutex.h>
24 #include <linux/mfd/core.h>
25 #include <linux/mfd/samsung/core.h>
26 #include <linux/mfd/samsung/irq.h>
27 #include <linux/mfd/samsung/rtc.h>
28 #include <linux/regmap.h>
30 static struct mfd_cell s5m8751_devs[] = {
32 .name = "s5m8751-pmic",
33 }, {
34 .name = "s5m-charger",
35 }, {
36 .name = "s5m8751-codec",
40 static struct mfd_cell s5m8763_devs[] = {
42 .name = "s5m8763-pmic",
43 }, {
44 .name = "s5m-rtc",
45 }, {
46 .name = "s5m-charger",
50 static struct mfd_cell s5m8767_devs[] = {
52 .name = "s5m8767-pmic",
53 }, {
54 .name = "s5m-rtc",
58 static struct mfd_cell s2mps11_devs[] = {
60 .name = "s2mps11-pmic",
64 #ifdef CONFIG_OF
65 static struct of_device_id sec_dt_match[] = {
66 { .compatible = "samsung,s5m8767-pmic",
67 .data = (void *)S5M8767X,
69 {},
71 #endif
73 int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest)
75 return regmap_read(sec_pmic->regmap, reg, dest);
77 EXPORT_SYMBOL_GPL(sec_reg_read);
79 int sec_bulk_read(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
81 return regmap_bulk_read(sec_pmic->regmap, reg, buf, count);
83 EXPORT_SYMBOL_GPL(sec_bulk_read);
85 int sec_reg_write(struct sec_pmic_dev *sec_pmic, u8 reg, u8 value)
87 return regmap_write(sec_pmic->regmap, reg, value);
89 EXPORT_SYMBOL_GPL(sec_reg_write);
91 int sec_bulk_write(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
93 return regmap_raw_write(sec_pmic->regmap, reg, buf, count);
95 EXPORT_SYMBOL_GPL(sec_bulk_write);
97 int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask)
99 return regmap_update_bits(sec_pmic->regmap, reg, mask, val);
101 EXPORT_SYMBOL_GPL(sec_reg_update);
103 static struct regmap_config sec_regmap_config = {
104 .reg_bits = 8,
105 .val_bits = 8,
109 #ifdef CONFIG_OF
111 * Only the common platform data elements for s5m8767 are parsed here from the
112 * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
113 * others have to parse their own platform data elements from device tree.
115 * The s5m8767 platform data structure is instantiated here and the drivers for
116 * the sub-modules need not instantiate another instance while parsing their
117 * platform data.
119 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
120 struct device *dev)
122 struct sec_platform_data *pd;
124 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
125 if (!pd) {
126 dev_err(dev, "could not allocate memory for pdata\n");
127 return ERR_PTR(-ENOMEM);
131 * ToDo: the 'wakeup' member in the platform data is more of a linux
132 * specfic information. Hence, there is no binding for that yet and
133 * not parsed here.
136 return pd;
138 #else
139 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
140 struct device *dev)
142 return 0;
144 #endif
146 static inline int sec_i2c_get_driver_data(struct i2c_client *i2c,
147 const struct i2c_device_id *id)
149 #ifdef CONFIG_OF
150 if (i2c->dev.of_node) {
151 const struct of_device_id *match;
152 match = of_match_node(sec_dt_match, i2c->dev.of_node);
153 return (int)match->data;
155 #endif
156 return (int)id->driver_data;
159 static int sec_pmic_probe(struct i2c_client *i2c,
160 const struct i2c_device_id *id)
162 struct sec_platform_data *pdata = i2c->dev.platform_data;
163 struct sec_pmic_dev *sec_pmic;
164 int ret;
166 sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
167 GFP_KERNEL);
168 if (sec_pmic == NULL)
169 return -ENOMEM;
171 i2c_set_clientdata(i2c, sec_pmic);
172 sec_pmic->dev = &i2c->dev;
173 sec_pmic->i2c = i2c;
174 sec_pmic->irq = i2c->irq;
175 sec_pmic->type = sec_i2c_get_driver_data(i2c, id);
177 if (sec_pmic->dev->of_node) {
178 pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
179 if (IS_ERR(pdata)) {
180 ret = PTR_ERR(pdata);
181 return ret;
183 pdata->device_type = sec_pmic->type;
185 if (pdata) {
186 sec_pmic->device_type = pdata->device_type;
187 sec_pmic->ono = pdata->ono;
188 sec_pmic->irq_base = pdata->irq_base;
189 sec_pmic->wakeup = pdata->wakeup;
190 sec_pmic->pdata = pdata;
193 sec_pmic->regmap = devm_regmap_init_i2c(i2c, &sec_regmap_config);
194 if (IS_ERR(sec_pmic->regmap)) {
195 ret = PTR_ERR(sec_pmic->regmap);
196 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
197 ret);
198 return ret;
201 sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
202 i2c_set_clientdata(sec_pmic->rtc, sec_pmic);
204 if (pdata && pdata->cfg_pmic_irq)
205 pdata->cfg_pmic_irq();
207 sec_irq_init(sec_pmic);
209 pm_runtime_set_active(sec_pmic->dev);
211 switch (sec_pmic->device_type) {
212 case S5M8751X:
213 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs,
214 ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL);
215 break;
216 case S5M8763X:
217 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs,
218 ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL);
219 break;
220 case S5M8767X:
221 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs,
222 ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL);
223 break;
224 case S2MPS11X:
225 ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs,
226 ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL);
227 break;
228 default:
229 /* If this happens the probe function is problem */
230 BUG();
233 if (ret < 0)
234 goto err;
236 return ret;
238 err:
239 mfd_remove_devices(sec_pmic->dev);
240 sec_irq_exit(sec_pmic);
241 i2c_unregister_device(sec_pmic->rtc);
242 return ret;
245 static int sec_pmic_remove(struct i2c_client *i2c)
247 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
249 mfd_remove_devices(sec_pmic->dev);
250 sec_irq_exit(sec_pmic);
251 i2c_unregister_device(sec_pmic->rtc);
252 return 0;
255 static const struct i2c_device_id sec_pmic_id[] = {
256 { "sec_pmic", 0 },
259 MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
261 static struct i2c_driver sec_pmic_driver = {
262 .driver = {
263 .name = "sec_pmic",
264 .owner = THIS_MODULE,
265 .of_match_table = of_match_ptr(sec_dt_match),
267 .probe = sec_pmic_probe,
268 .remove = sec_pmic_remove,
269 .id_table = sec_pmic_id,
272 static int __init sec_pmic_init(void)
274 return i2c_add_driver(&sec_pmic_driver);
277 subsys_initcall(sec_pmic_init);
279 static void __exit sec_pmic_exit(void)
281 i2c_del_driver(&sec_pmic_driver);
283 module_exit(sec_pmic_exit);
285 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
286 MODULE_DESCRIPTION("Core support for the S5M MFD");
287 MODULE_LICENSE("GPL");