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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / mfd / tps80031.c
blob907452b86e32345326d3d6cc5122f99797867b15
1 /*
2 * tps80031.c -- TI TPS80031/TPS80032 mfd core driver.
3 *
4 * MFD core driver for TI TPS80031/TPS80032 Fully Integrated
5 * Power Management with Power Path and Battery Charger
6 *
7 * Copyright (c) 2012, NVIDIA Corporation.
8 *
9 * Author: Laxman Dewangan <ldewangan@nvidia.com>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation version 2.
14 *
15 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
16 * whether express or implied; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 * 02111-1307, USA
24 */
25
26 #include <linux/err.h>
27 #include <linux/i2c.h>
28 #include <linux/init.h>
29 #include <linux/interrupt.h>
30 #include <linux/irq.h>
31 #include <linux/mfd/core.h>
32 #include <linux/mfd/tps80031.h>
33 #include <linux/pm.h>
34 #include <linux/regmap.h>
35 #include <linux/slab.h>
36
37 static struct resource tps80031_rtc_resources[] = {
38 {
39 .start = TPS80031_INT_RTC_ALARM,
40 .end = TPS80031_INT_RTC_ALARM,
41 .flags = IORESOURCE_IRQ,
42 },
43 };
44
45 /* TPS80031 sub mfd devices */
46 static const struct mfd_cell tps80031_cell[] = {
47 {
48 .name = "tps80031-pmic",
49 },
50 {
51 .name = "tps80031-clock",
52 },
53 {
54 .name = "tps80031-rtc",
55 .num_resources = ARRAY_SIZE(tps80031_rtc_resources),
56 .resources = tps80031_rtc_resources,
57 },
58 {
59 .name = "tps80031-gpadc",
60 },
61 {
62 .name = "tps80031-fuel-gauge",
63 },
64 {
65 .name = "tps80031-charger",
66 },
67 };
68
69 static int tps80031_slave_address[TPS80031_NUM_SLAVES] = {
70 TPS80031_I2C_ID0_ADDR,
71 TPS80031_I2C_ID1_ADDR,
72 TPS80031_I2C_ID2_ADDR,
73 TPS80031_I2C_ID3_ADDR,
74 };
75
76 struct tps80031_pupd_data {
77 u8 reg;
78 u8 pullup_bit;
79 u8 pulldown_bit;
80 };
81
82 #define TPS80031_IRQ(_reg, _mask) \
83 { \
84 .reg_offset = (TPS80031_INT_MSK_LINE_##_reg) - \
85 TPS80031_INT_MSK_LINE_A, \
86 .mask = BIT(_mask), \
87 }
88
89 static const struct regmap_irq tps80031_main_irqs[] = {
90 [TPS80031_INT_PWRON] = TPS80031_IRQ(A, 0),
91 [TPS80031_INT_RPWRON] = TPS80031_IRQ(A, 1),
92 [TPS80031_INT_SYS_VLOW] = TPS80031_IRQ(A, 2),
93 [TPS80031_INT_RTC_ALARM] = TPS80031_IRQ(A, 3),
94 [TPS80031_INT_RTC_PERIOD] = TPS80031_IRQ(A, 4),
95 [TPS80031_INT_HOT_DIE] = TPS80031_IRQ(A, 5),
96 [TPS80031_INT_VXX_SHORT] = TPS80031_IRQ(A, 6),
97 [TPS80031_INT_SPDURATION] = TPS80031_IRQ(A, 7),
98 [TPS80031_INT_WATCHDOG] = TPS80031_IRQ(B, 0),
99 [TPS80031_INT_BAT] = TPS80031_IRQ(B, 1),
100 [TPS80031_INT_SIM] = TPS80031_IRQ(B, 2),
101 [TPS80031_INT_MMC] = TPS80031_IRQ(B, 3),
102 [TPS80031_INT_RES] = TPS80031_IRQ(B, 4),
103 [TPS80031_INT_GPADC_RT] = TPS80031_IRQ(B, 5),
104 [TPS80031_INT_GPADC_SW2_EOC] = TPS80031_IRQ(B, 6),
105 [TPS80031_INT_CC_AUTOCAL] = TPS80031_IRQ(B, 7),
106 [TPS80031_INT_ID_WKUP] = TPS80031_IRQ(C, 0),
107 [TPS80031_INT_VBUSS_WKUP] = TPS80031_IRQ(C, 1),
108 [TPS80031_INT_ID] = TPS80031_IRQ(C, 2),
109 [TPS80031_INT_VBUS] = TPS80031_IRQ(C, 3),
110 [TPS80031_INT_CHRG_CTRL] = TPS80031_IRQ(C, 4),
111 [TPS80031_INT_EXT_CHRG] = TPS80031_IRQ(C, 5),
112 [TPS80031_INT_INT_CHRG] = TPS80031_IRQ(C, 6),
113 [TPS80031_INT_RES2] = TPS80031_IRQ(C, 7),
114 };
115
116 static struct regmap_irq_chip tps80031_irq_chip = {
117 .name = "tps80031",
118 .irqs = tps80031_main_irqs,
119 .num_irqs = ARRAY_SIZE(tps80031_main_irqs),
120 .num_regs = 3,
121 .status_base = TPS80031_INT_STS_A,
122 .mask_base = TPS80031_INT_MSK_LINE_A,
123 };
124
125 #define PUPD_DATA(_reg, _pulldown_bit, _pullup_bit) \
126 { \
127 .reg = TPS80031_CFG_INPUT_PUPD##_reg, \
128 .pulldown_bit = _pulldown_bit, \
129 .pullup_bit = _pullup_bit, \
130 }
131
132 static const struct tps80031_pupd_data tps80031_pupds[] = {
133 [TPS80031_PREQ1] = PUPD_DATA(1, BIT(0), BIT(1)),
134 [TPS80031_PREQ2A] = PUPD_DATA(1, BIT(2), BIT(3)),
135 [TPS80031_PREQ2B] = PUPD_DATA(1, BIT(4), BIT(5)),
136 [TPS80031_PREQ2C] = PUPD_DATA(1, BIT(6), BIT(7)),
137 [TPS80031_PREQ3] = PUPD_DATA(2, BIT(0), BIT(1)),
138 [TPS80031_NRES_WARM] = PUPD_DATA(2, 0, BIT(2)),
139 [TPS80031_PWM_FORCE] = PUPD_DATA(2, BIT(5), 0),
140 [TPS80031_CHRG_EXT_CHRG_STATZ] = PUPD_DATA(2, 0, BIT(6)),
141 [TPS80031_SIM] = PUPD_DATA(3, BIT(0), BIT(1)),
142 [TPS80031_MMC] = PUPD_DATA(3, BIT(2), BIT(3)),
143 [TPS80031_GPADC_START] = PUPD_DATA(3, BIT(4), 0),
144 [TPS80031_DVSI2C_SCL] = PUPD_DATA(4, 0, BIT(0)),
145 [TPS80031_DVSI2C_SDA] = PUPD_DATA(4, 0, BIT(1)),
146 [TPS80031_CTLI2C_SCL] = PUPD_DATA(4, 0, BIT(2)),
147 [TPS80031_CTLI2C_SDA] = PUPD_DATA(4, 0, BIT(3)),
148 };
149 static struct tps80031 *tps80031_power_off_dev;
150
151 int tps80031_ext_power_req_config(struct device *dev,
152 unsigned long ext_ctrl_flag, int preq_bit,
153 int state_reg_add, int trans_reg_add)
154 {
155 u8 res_ass_reg = 0;
156 int preq_mask_bit = 0;
157 int ret;
158
159 if (!(ext_ctrl_flag & TPS80031_EXT_PWR_REQ))
160 return 0;
161
162 if (ext_ctrl_flag & TPS80031_PWR_REQ_INPUT_PREQ1) {
163 res_ass_reg = TPS80031_PREQ1_RES_ASS_A + (preq_bit >> 3);
164 preq_mask_bit = 5;
165 } else if (ext_ctrl_flag & TPS80031_PWR_REQ_INPUT_PREQ2) {
166 res_ass_reg = TPS80031_PREQ2_RES_ASS_A + (preq_bit >> 3);
167 preq_mask_bit = 6;
168 } else if (ext_ctrl_flag & TPS80031_PWR_REQ_INPUT_PREQ3) {
169 res_ass_reg = TPS80031_PREQ3_RES_ASS_A + (preq_bit >> 3);
170 preq_mask_bit = 7;
171 }
172
173 /* Configure REQ_ASS registers */
174 ret = tps80031_set_bits(dev, TPS80031_SLAVE_ID1, res_ass_reg,
175 BIT(preq_bit & 0x7));
176 if (ret < 0) {
177 dev_err(dev, "reg 0x%02x setbit failed, err = %d\n",
178 res_ass_reg, ret);
179 return ret;
180 }
181
182 /* Unmask the PREQ */
183 ret = tps80031_clr_bits(dev, TPS80031_SLAVE_ID1,
184 TPS80031_PHOENIX_MSK_TRANSITION, BIT(preq_mask_bit));
185 if (ret < 0) {
186 dev_err(dev, "reg 0x%02x clrbit failed, err = %d\n",
187 TPS80031_PHOENIX_MSK_TRANSITION, ret);
188 return ret;
189 }
190
191 /* Switch regulator control to resource now */
192 if (ext_ctrl_flag & (TPS80031_PWR_REQ_INPUT_PREQ2 |
193 TPS80031_PWR_REQ_INPUT_PREQ3)) {
194 ret = tps80031_update(dev, TPS80031_SLAVE_ID1, state_reg_add,
195 0x0, TPS80031_STATE_MASK);
196 if (ret < 0)
197 dev_err(dev, "reg 0x%02x update failed, err = %d\n",
198 state_reg_add, ret);
199 } else {
200 ret = tps80031_update(dev, TPS80031_SLAVE_ID1, trans_reg_add,
201 TPS80031_TRANS_SLEEP_OFF,
202 TPS80031_TRANS_SLEEP_MASK);
203 if (ret < 0)
204 dev_err(dev, "reg 0x%02x update failed, err = %d\n",
205 trans_reg_add, ret);
206 }
207 return ret;
208 }
209 EXPORT_SYMBOL_GPL(tps80031_ext_power_req_config);
210
211 static void tps80031_power_off(void)
212 {
213 dev_info(tps80031_power_off_dev->dev, "switching off PMU\n");
214 tps80031_write(tps80031_power_off_dev->dev, TPS80031_SLAVE_ID1,
215 TPS80031_PHOENIX_DEV_ON, TPS80031_DEVOFF);
216 }
217
218 static void tps80031_pupd_init(struct tps80031 *tps80031,
219 struct tps80031_platform_data *pdata)
220 {
221 struct tps80031_pupd_init_data *pupd_init_data = pdata->pupd_init_data;
222 int data_size = pdata->pupd_init_data_size;
223 int i;
224
225 for (i = 0; i < data_size; ++i) {
226 struct tps80031_pupd_init_data *pupd_init = &pupd_init_data[i];
227 const struct tps80031_pupd_data *pupd =
228 &tps80031_pupds[pupd_init->input_pin];
229 u8 update_value = 0;
230 u8 update_mask = pupd->pulldown_bit | pupd->pullup_bit;
231
232 if (pupd_init->setting == TPS80031_PUPD_PULLDOWN)
233 update_value = pupd->pulldown_bit;
234 else if (pupd_init->setting == TPS80031_PUPD_PULLUP)
235 update_value = pupd->pullup_bit;
236
237 tps80031_update(tps80031->dev, TPS80031_SLAVE_ID1, pupd->reg,
238 update_value, update_mask);
239 }
240 }
241
242 static int tps80031_init_ext_control(struct tps80031 *tps80031,
243 struct tps80031_platform_data *pdata)
244 {
245 struct device *dev = tps80031->dev;
246 int ret;
247 int i;
248
249 /* Clear all external control for this rail */
250 for (i = 0; i < 9; ++i) {
251 ret = tps80031_write(dev, TPS80031_SLAVE_ID1,
252 TPS80031_PREQ1_RES_ASS_A + i, 0);
253 if (ret < 0) {
254 dev_err(dev, "reg 0x%02x write failed, err = %d\n",
255 TPS80031_PREQ1_RES_ASS_A + i, ret);
256 return ret;
257 }
258 }
259
260 /* Mask the PREQ */
261 ret = tps80031_set_bits(dev, TPS80031_SLAVE_ID1,
262 TPS80031_PHOENIX_MSK_TRANSITION, 0x7 << 5);
263 if (ret < 0) {
264 dev_err(dev, "reg 0x%02x set_bits failed, err = %d\n",
265 TPS80031_PHOENIX_MSK_TRANSITION, ret);
266 return ret;
267 }
268 return ret;
269 }
270
271 static int tps80031_irq_init(struct tps80031 *tps80031, int irq, int irq_base)
272 {
273 struct device *dev = tps80031->dev;
274 int i, ret;
275
276 /*
277 * The MASK register used for updating status register when
278 * interrupt occurs and LINE register used to pass the status
279 * to actual interrupt line. As per datasheet:
280 * When INT_MSK_LINE [i] is set to 1, the associated interrupt
281 * number i is INT line masked, which means that no interrupt is
282 * generated on the INT line.
283 * When INT_MSK_LINE [i] is set to 0, the associated interrupt
284 * number i is line enabled: An interrupt is generated on the
285 * INT line.
286 * In any case, the INT_STS [i] status bit may or may not be updated,
287 * only linked to the INT_MSK_STS [i] configuration register bit.
288 *
289 * When INT_MSK_STS [i] is set to 1, the associated interrupt number
290 * i is status masked, which means that no interrupt is stored in
291 * the INT_STS[i] status bit. Note that no interrupt number i is
292 * generated on the INT line, even if the INT_MSK_LINE [i] register
293 * bit is set to 0.
294 * When INT_MSK_STS [i] is set to 0, the associated interrupt number i
295 * is status enabled: An interrupt status is updated in the INT_STS [i]
296 * register. The interrupt may or may not be generated on the INT line,
297 * depending on the INT_MSK_LINE [i] configuration register bit.
298 */
299 for (i = 0; i < 3; i++)
300 tps80031_write(dev, TPS80031_SLAVE_ID2,
301 TPS80031_INT_MSK_STS_A + i, 0x00);
302
303 ret = regmap_add_irq_chip(tps80031->regmap[TPS80031_SLAVE_ID2], irq,
304 IRQF_ONESHOT, irq_base,
305 &tps80031_irq_chip, &tps80031->irq_data);
306 if (ret < 0) {
307 dev_err(dev, "add irq failed, err = %d\n", ret);
308 return ret;
309 }
310 return ret;
311 }
312
313 static bool rd_wr_reg_id0(struct device *dev, unsigned int reg)
314 {
315 switch (reg) {
316 case TPS80031_SMPS1_CFG_FORCE ... TPS80031_SMPS2_CFG_VOLTAGE:
317 return true;
318 default:
319 return false;
320 }
321 }
322
323 static bool rd_wr_reg_id1(struct device *dev, unsigned int reg)
324 {
325 switch (reg) {
326 case TPS80031_SECONDS_REG ... TPS80031_RTC_RESET_STATUS_REG:
327 case TPS80031_VALIDITY0 ... TPS80031_VALIDITY7:
328 case TPS80031_PHOENIX_START_CONDITION ... TPS80031_KEY_PRESS_DUR_CFG:
329 case TPS80031_SMPS4_CFG_TRANS ... TPS80031_SMPS3_CFG_VOLTAGE:
330 case TPS80031_BROADCAST_ADDR_ALL ... TPS80031_BROADCAST_ADDR_CLK_RST:
331 case TPS80031_VANA_CFG_TRANS ... TPS80031_LDO7_CFG_VOLTAGE:
332 case TPS80031_REGEN1_CFG_TRANS ... TPS80031_TMP_CFG_STATE:
333 case TPS80031_PREQ1_RES_ASS_A ... TPS80031_PREQ3_RES_ASS_C:
334 case TPS80031_SMPS_OFFSET ... TPS80031_BATDEBOUNCING:
335 case TPS80031_CFG_INPUT_PUPD1 ... TPS80031_CFG_SMPS_PD:
336 case TPS80031_BACKUP_REG:
337 return true;
338 default:
339 return false;
340 }
341 }
342
343 static bool is_volatile_reg_id1(struct device *dev, unsigned int reg)
344 {
345 switch (reg) {
346 case TPS80031_SMPS4_CFG_TRANS ... TPS80031_SMPS3_CFG_VOLTAGE:
347 case TPS80031_VANA_CFG_TRANS ... TPS80031_LDO7_CFG_VOLTAGE:
348 case TPS80031_REGEN1_CFG_TRANS ... TPS80031_TMP_CFG_STATE:
349 case TPS80031_PREQ1_RES_ASS_A ... TPS80031_PREQ3_RES_ASS_C:
350 case TPS80031_SMPS_OFFSET ... TPS80031_BATDEBOUNCING:
351 case TPS80031_CFG_INPUT_PUPD1 ... TPS80031_CFG_SMPS_PD:
352 return true;
353 default:
354 return false;
355 }
356 }
357
358 static bool rd_wr_reg_id2(struct device *dev, unsigned int reg)
359 {
360 switch (reg) {
361 case TPS80031_USB_VENDOR_ID_LSB ... TPS80031_USB_OTG_REVISION:
362 case TPS80031_GPADC_CTRL ... TPS80031_CTRL_P1:
363 case TPS80031_RTCH0_LSB ... TPS80031_GPCH0_MSB:
364 case TPS80031_TOGGLE1 ... TPS80031_VIBMODE:
365 case TPS80031_PWM1ON ... TPS80031_PWM2OFF:
366 case TPS80031_FG_REG_00 ... TPS80031_FG_REG_11:
367 case TPS80031_INT_STS_A ... TPS80031_INT_MSK_STS_C:
368 case TPS80031_CONTROLLER_CTRL2 ... TPS80031_LED_PWM_CTRL2:
369 return true;
370 default:
371 return false;
372 }
373 }
374
375 static bool rd_wr_reg_id3(struct device *dev, unsigned int reg)
376 {
377 switch (reg) {
378 case TPS80031_GPADC_TRIM0 ... TPS80031_GPADC_TRIM18:
379 return true;
380 default:
381 return false;
382 }
383 }
384
385 static const struct regmap_config tps80031_regmap_configs[] = {
386 {
387 .reg_bits = 8,
388 .val_bits = 8,
389 .writeable_reg = rd_wr_reg_id0,
390 .readable_reg = rd_wr_reg_id0,
391 .max_register = TPS80031_MAX_REGISTER,
392 },
393 {
394 .reg_bits = 8,
395 .val_bits = 8,
396 .writeable_reg = rd_wr_reg_id1,
397 .readable_reg = rd_wr_reg_id1,
398 .volatile_reg = is_volatile_reg_id1,
399 .max_register = TPS80031_MAX_REGISTER,
400 },
401 {
402 .reg_bits = 8,
403 .val_bits = 8,
404 .writeable_reg = rd_wr_reg_id2,
405 .readable_reg = rd_wr_reg_id2,
406 .max_register = TPS80031_MAX_REGISTER,
407 },
408 {
409 .reg_bits = 8,
410 .val_bits = 8,
411 .writeable_reg = rd_wr_reg_id3,
412 .readable_reg = rd_wr_reg_id3,
413 .max_register = TPS80031_MAX_REGISTER,
414 },
415 };
416
417 static int tps80031_probe(struct i2c_client *client,
418 const struct i2c_device_id *id)
419 {
420 struct tps80031_platform_data *pdata = dev_get_platdata(&client->dev);
421 struct tps80031 *tps80031;
422 int ret;
423 uint8_t es_version;
424 uint8_t ep_ver;
425 int i;
426
427 if (!pdata) {
428 dev_err(&client->dev, "tps80031 requires platform data\n");
429 return -EINVAL;
430 }
431
432 tps80031 = devm_kzalloc(&client->dev, sizeof(*tps80031), GFP_KERNEL);
433 if (!tps80031)
434 return -ENOMEM;
435
436 for (i = 0; i < TPS80031_NUM_SLAVES; i++) {
437 if (tps80031_slave_address[i] == client->addr)
438 tps80031->clients[i] = client;
439 else
440 tps80031->clients[i] = devm_i2c_new_dummy_device(&client->dev,
441 client->adapter, tps80031_slave_address[i]);
442 if (IS_ERR(tps80031->clients[i])) {
443 dev_err(&client->dev, "can't attach client %d\n", i);
444 return PTR_ERR(tps80031->clients[i]);
445 }
446
447 i2c_set_clientdata(tps80031->clients[i], tps80031);
448 tps80031->regmap[i] = devm_regmap_init_i2c(tps80031->clients[i],
449 &tps80031_regmap_configs[i]);
450 if (IS_ERR(tps80031->regmap[i])) {
451 ret = PTR_ERR(tps80031->regmap[i]);
452 dev_err(&client->dev,
453 "regmap %d init failed, err %d\n", i, ret);
454 return ret;
455 }
456 }
457
458 ret = tps80031_read(&client->dev, TPS80031_SLAVE_ID3,
459 TPS80031_JTAGVERNUM, &es_version);
460 if (ret < 0) {
461 dev_err(&client->dev,
462 "Silicon version number read failed: %d\n", ret);
463 return ret;
464 }
465
466 ret = tps80031_read(&client->dev, TPS80031_SLAVE_ID3,
467 TPS80031_EPROM_REV, &ep_ver);
468 if (ret < 0) {
469 dev_err(&client->dev,
470 "Silicon eeprom version read failed: %d\n", ret);
471 return ret;
472 }
473
474 dev_info(&client->dev, "ES version 0x%02x and EPROM version 0x%02x\n",
475 es_version, ep_ver);
476 tps80031->es_version = es_version;
477 tps80031->dev = &client->dev;
478 i2c_set_clientdata(client, tps80031);
479 tps80031->chip_info = id->driver_data;
480
481 ret = tps80031_irq_init(tps80031, client->irq, pdata->irq_base);
482 if (ret) {
483 dev_err(&client->dev, "IRQ init failed: %d\n", ret);
484 return ret;
485 }
486
487 tps80031_pupd_init(tps80031, pdata);
488
489 tps80031_init_ext_control(tps80031, pdata);
490
491 ret = mfd_add_devices(tps80031->dev, -1,
492 tps80031_cell, ARRAY_SIZE(tps80031_cell),
493 NULL, 0,
494 regmap_irq_get_domain(tps80031->irq_data));
495 if (ret < 0) {
496 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
497 goto fail_mfd_add;
498 }
499
500 if (pdata->use_power_off && !pm_power_off) {
501 tps80031_power_off_dev = tps80031;
502 pm_power_off = tps80031_power_off;
503 }
504 return 0;
505
506 fail_mfd_add:
507 regmap_del_irq_chip(client->irq, tps80031->irq_data);
508 return ret;
509 }
510
511 static const struct i2c_device_id tps80031_id_table[] = {
512 { "tps80031", TPS80031 },
513 { "tps80032", TPS80032 },
514 { }
515 };
516
517 static struct i2c_driver tps80031_driver = {
518 .driver = {
519 .name = "tps80031",
520 .suppress_bind_attrs = true,
521 },
522 .probe = tps80031_probe,
523 .id_table = tps80031_id_table,
524 };
525
526 static int __init tps80031_init(void)
527 {
528 return i2c_add_driver(&tps80031_driver);
529 }
530 subsys_initcall(tps80031_init);
Linux with added FPC-III support