mfd: Fix tps65090 ifdefs for suspend mode
[linux-2.6.git] / drivers / mfd / tps65090.c
1 /*
2  * Core driver for TI TPS65090 PMIC family
3  *
4  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
5
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms and conditions of the GNU General Public License,
8  * version 2, as published by the Free Software Foundation.
9
10  * This program is distributed in the hope it will be useful, but WITHOUT
11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13  * more details.
14
15  * You should have received a copy of the GNU General Public License
16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
17  */
18
19 #include <linux/interrupt.h>
20 #include <linux/irq.h>
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/mutex.h>
24 #include <linux/slab.h>
25 #include <linux/i2c.h>
26 #include <linux/mfd/core.h>
27 #include <linux/mfd/tps65090.h>
28 #include <linux/regmap.h>
29 #include <linux/err.h>
30
31 #define NUM_INT_REG 2
32 #define TOTAL_NUM_REG 0x18
33
34 /* interrupt status registers */
35 #define TPS65090_INT_STS        0x0
36 #define TPS65090_INT_STS2       0x1
37
38 /* interrupt mask registers */
39 #define TPS65090_INT_MSK        0x2
40 #define TPS65090_INT_MSK2       0x3
41
42 struct tps65090_irq_data {
43         u8              mask_reg;
44         u8              mask_pos;
45 };
46
47 #define TPS65090_IRQ(_reg, _mask_pos)           \
48         {                                       \
49                 .mask_reg       = (_reg),       \
50                 .mask_pos       = (_mask_pos),  \
51         }
52
53 static const struct tps65090_irq_data tps65090_irqs[] = {
54         [0]             = TPS65090_IRQ(0, 0),
55         [1]             = TPS65090_IRQ(0, 1),
56         [2]             = TPS65090_IRQ(0, 2),
57         [3]             = TPS65090_IRQ(0, 3),
58         [4]             = TPS65090_IRQ(0, 4),
59         [5]             = TPS65090_IRQ(0, 5),
60         [6]             = TPS65090_IRQ(0, 6),
61         [7]             = TPS65090_IRQ(0, 7),
62         [8]             = TPS65090_IRQ(1, 0),
63         [9]             = TPS65090_IRQ(1, 1),
64         [10]            = TPS65090_IRQ(1, 2),
65         [11]            = TPS65090_IRQ(1, 3),
66         [12]            = TPS65090_IRQ(1, 4),
67         [13]            = TPS65090_IRQ(1, 5),
68         [14]            = TPS65090_IRQ(1, 6),
69         [15]            = TPS65090_IRQ(1, 7),
70 };
71
72 static struct mfd_cell tps65090s[] = {
73         {
74                 .name = "tps65910-pmic",
75         },
76         {
77                 .name = "tps65910-regulator",
78         },
79 };
80
81 struct tps65090 {
82         struct mutex            lock;
83         struct device           *dev;
84         struct i2c_client       *client;
85         struct regmap           *rmap;
86         struct irq_chip         irq_chip;
87         struct mutex            irq_lock;
88         int                     irq_base;
89         unsigned int            id;
90 };
91
92 int tps65090_write(struct device *dev, int reg, uint8_t val)
93 {
94         struct tps65090 *tps = dev_get_drvdata(dev);
95         return regmap_write(tps->rmap, reg, val);
96 }
97 EXPORT_SYMBOL_GPL(tps65090_write);
98
99 int tps65090_read(struct device *dev, int reg, uint8_t *val)
100 {
101         struct tps65090 *tps = dev_get_drvdata(dev);
102         unsigned int temp_val;
103         int ret;
104         ret = regmap_read(tps->rmap, reg, &temp_val);
105         if (!ret)
106                 *val = temp_val;
107         return ret;
108 }
109 EXPORT_SYMBOL_GPL(tps65090_read);
110
111 int tps65090_set_bits(struct device *dev, int reg, uint8_t bit_num)
112 {
113         struct tps65090 *tps = dev_get_drvdata(dev);
114         return regmap_update_bits(tps->rmap, reg, BIT(bit_num), ~0u);
115 }
116 EXPORT_SYMBOL_GPL(tps65090_set_bits);
117
118 int tps65090_clr_bits(struct device *dev, int reg, uint8_t bit_num)
119 {
120         struct tps65090 *tps = dev_get_drvdata(dev);
121         return regmap_update_bits(tps->rmap, reg, BIT(bit_num), 0u);
122 }
123 EXPORT_SYMBOL_GPL(tps65090_clr_bits);
124
125 static void tps65090_irq_lock(struct irq_data *data)
126 {
127         struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);
128
129         mutex_lock(&tps65090->irq_lock);
130 }
131
132 static void tps65090_irq_mask(struct irq_data *irq_data)
133 {
134         struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
135         unsigned int __irq = irq_data->hwirq;
136         const struct tps65090_irq_data *data = &tps65090_irqs[__irq];
137
138         tps65090_set_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
139                 data->mask_pos);
140 }
141
142 static void tps65090_irq_unmask(struct irq_data *irq_data)
143 {
144         struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
145         unsigned int __irq = irq_data->irq - tps65090->irq_base;
146         const struct tps65090_irq_data *data = &tps65090_irqs[__irq];
147
148         tps65090_clr_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
149                 data->mask_pos);
150 }
151
152 static void tps65090_irq_sync_unlock(struct irq_data *data)
153 {
154         struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);
155
156         mutex_unlock(&tps65090->irq_lock);
157 }
158
159 static irqreturn_t tps65090_irq(int irq, void *data)
160 {
161         struct tps65090 *tps65090 = data;
162         int ret = 0;
163         u8 status, mask;
164         unsigned long int acks = 0;
165         int i;
166
167         for (i = 0; i < NUM_INT_REG; i++) {
168                 ret = tps65090_read(tps65090->dev, TPS65090_INT_MSK + i, &mask);
169                 if (ret < 0) {
170                         dev_err(tps65090->dev,
171                                 "failed to read mask reg [addr:%d]\n",
172                                 TPS65090_INT_MSK + i);
173                         return IRQ_NONE;
174                 }
175                 ret = tps65090_read(tps65090->dev, TPS65090_INT_STS + i,
176                         &status);
177                 if (ret < 0) {
178                         dev_err(tps65090->dev,
179                                 "failed to read status reg [addr:%d]\n",
180                                  TPS65090_INT_STS + i);
181                         return IRQ_NONE;
182                 }
183                 if (status) {
184                         /* Ack only those interrupts which are not masked */
185                         status &= (~mask);
186                         ret = tps65090_write(tps65090->dev,
187                                         TPS65090_INT_STS + i, status);
188                         if (ret < 0) {
189                                 dev_err(tps65090->dev,
190                                         "failed to write interrupt status\n");
191                                 return IRQ_NONE;
192                         }
193                         acks |= (status << (i * 8));
194                 }
195         }
196
197         for_each_set_bit(i, &acks, ARRAY_SIZE(tps65090_irqs))
198                 handle_nested_irq(tps65090->irq_base + i);
199         return acks ? IRQ_HANDLED : IRQ_NONE;
200 }
201
202 static int __devinit tps65090_irq_init(struct tps65090 *tps65090, int irq,
203         int irq_base)
204 {
205         int i, ret;
206
207         if (!irq_base) {
208                 dev_err(tps65090->dev, "IRQ base not set\n");
209                 return -EINVAL;
210         }
211
212         mutex_init(&tps65090->irq_lock);
213
214         for (i = 0; i < NUM_INT_REG; i++)
215                 tps65090_write(tps65090->dev, TPS65090_INT_MSK + i, 0xFF);
216
217         for (i = 0; i < NUM_INT_REG; i++)
218                 tps65090_write(tps65090->dev, TPS65090_INT_STS + i, 0xff);
219
220         tps65090->irq_base = irq_base;
221         tps65090->irq_chip.name = "tps65090";
222         tps65090->irq_chip.irq_mask = tps65090_irq_mask;
223         tps65090->irq_chip.irq_unmask = tps65090_irq_unmask;
224         tps65090->irq_chip.irq_bus_lock = tps65090_irq_lock;
225         tps65090->irq_chip.irq_bus_sync_unlock = tps65090_irq_sync_unlock;
226
227         for (i = 0; i < ARRAY_SIZE(tps65090_irqs); i++) {
228                 int __irq = i + tps65090->irq_base;
229                 irq_set_chip_data(__irq, tps65090);
230                 irq_set_chip_and_handler(__irq, &tps65090->irq_chip,
231                                          handle_simple_irq);
232                 irq_set_nested_thread(__irq, 1);
233 #ifdef CONFIG_ARM
234                 set_irq_flags(__irq, IRQF_VALID);
235 #endif
236         }
237
238         ret = request_threaded_irq(irq, NULL, tps65090_irq, IRQF_ONESHOT,
239                                 "tps65090", tps65090);
240         if (!ret) {
241                 device_init_wakeup(tps65090->dev, 1);
242                 enable_irq_wake(irq);
243         }
244
245         return ret;
246 }
247
248 static bool is_volatile_reg(struct device *dev, unsigned int reg)
249 {
250         if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS))
251                 return true;
252         else
253                 return false;
254 }
255
256 static const struct regmap_config tps65090_regmap_config = {
257         .reg_bits = 8,
258         .val_bits = 8,
259         .max_register = TOTAL_NUM_REG,
260         .num_reg_defaults_raw = TOTAL_NUM_REG,
261         .cache_type = REGCACHE_RBTREE,
262         .volatile_reg = is_volatile_reg,
263 };
264
265 static int __devinit tps65090_i2c_probe(struct i2c_client *client,
266                                         const struct i2c_device_id *id)
267 {
268         struct tps65090_platform_data *pdata = client->dev.platform_data;
269         struct tps65090 *tps65090;
270         int ret;
271
272         if (!pdata) {
273                 dev_err(&client->dev, "tps65090 requires platform data\n");
274                 return -EINVAL;
275         }
276
277         tps65090 = devm_kzalloc(&client->dev, sizeof(struct tps65090),
278                 GFP_KERNEL);
279         if (tps65090 == NULL)
280                 return -ENOMEM;
281
282         tps65090->client = client;
283         tps65090->dev = &client->dev;
284         i2c_set_clientdata(client, tps65090);
285
286         mutex_init(&tps65090->lock);
287
288         if (client->irq) {
289                 ret = tps65090_irq_init(tps65090, client->irq, pdata->irq_base);
290                 if (ret) {
291                         dev_err(&client->dev, "IRQ init failed with err: %d\n",
292                                 ret);
293                         goto err_exit;
294                 }
295         }
296
297         tps65090->rmap = regmap_init_i2c(tps65090->client,
298                 &tps65090_regmap_config);
299         if (IS_ERR(tps65090->rmap)) {
300                 dev_err(&client->dev, "regmap_init failed with err: %ld\n",
301                         PTR_ERR(tps65090->rmap));
302                 goto err_irq_exit;
303         };
304
305         ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
306                 ARRAY_SIZE(tps65090s), NULL, 0);
307         if (ret) {
308                 dev_err(&client->dev, "add mfd devices failed with err: %d\n",
309                         ret);
310                 goto err_regmap_exit;
311         }
312
313         return 0;
314
315 err_regmap_exit:
316         regmap_exit(tps65090->rmap);
317
318 err_irq_exit:
319         if (client->irq)
320                 free_irq(client->irq, tps65090);
321 err_exit:
322         return ret;
323 }
324
325 static int __devexit tps65090_i2c_remove(struct i2c_client *client)
326 {
327         struct tps65090 *tps65090 = i2c_get_clientdata(client);
328
329         mfd_remove_devices(tps65090->dev);
330         regmap_exit(tps65090->rmap);
331         if (client->irq)
332                 free_irq(client->irq, tps65090);
333
334         return 0;
335 }
336
337 #ifdef CONFIG_PM_SLEEP
338 static int tps65090_i2c_suspend(struct i2c_client *client, pm_message_t state)
339 {
340         if (client->irq)
341                 disable_irq(client->irq);
342         return 0;
343 }
344
345 static int tps65090_i2c_resume(struct i2c_client *client)
346 {
347         if (client->irq)
348                 enable_irq(client->irq);
349         return 0;
350 }
351 #endif
352
353 static const struct i2c_device_id tps65090_id_table[] = {
354         { "tps65090", 0 },
355         { },
356 };
357 MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
358
359 static struct i2c_driver tps65090_driver = {
360         .driver = {
361                 .name   = "tps65090",
362                 .owner  = THIS_MODULE,
363         },
364         .probe          = tps65090_i2c_probe,
365         .remove         = __devexit_p(tps65090_i2c_remove),
366 #ifdef CONFIG_PM_SLEEP
367         .suspend        = tps65090_i2c_suspend,
368         .resume         = tps65090_i2c_resume,
369 #endif
370         .id_table       = tps65090_id_table,
371 };
372
373 static int __init tps65090_init(void)
374 {
375         return i2c_add_driver(&tps65090_driver);
376 }
377 subsys_initcall(tps65090_init);
378
379 static void __exit tps65090_exit(void)
380 {
381         i2c_del_driver(&tps65090_driver);
382 }
383 module_exit(tps65090_exit);
384
385 MODULE_DESCRIPTION("TPS65090 core driver");
386 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
387 MODULE_LICENSE("GPL v2");