1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // |
3 | // MCP16502 PMIC driver |
4 | // |
5 | // Copyright (C) 2018 Microchip Technology Inc. and its subsidiaries |
6 | // |
7 | // Author: Andrei Stefanescu <andrei.stefanescu@microchip.com> |
8 | // |
9 | // Inspired from tps65086-regulator.c |
10 | |
11 | #include <linux/i2c.h> |
12 | #include <linux/init.h> |
13 | #include <linux/kernel.h> |
14 | #include <linux/module.h> |
15 | #include <linux/of.h> |
16 | #include <linux/regmap.h> |
17 | #include <linux/regulator/driver.h> |
18 | #include <linux/suspend.h> |
19 | #include <linux/gpio/consumer.h> |
20 | |
21 | #define VDD_LOW_SEL 0x0D |
22 | #define VDD_HIGH_SEL 0x3F |
23 | |
24 | #define MCP16502_FLT BIT(7) |
25 | #define MCP16502_DVSR GENMASK(3, 2) |
26 | #define MCP16502_ENS BIT(0) |
27 | |
28 | /* |
29 | * The PMIC has four sets of registers corresponding to four power modes: |
30 | * Performance, Active, Low-power, Hibernate. |
31 | * |
32 | * Registers: |
33 | * Each regulator has a register for each power mode. To access a register |
34 | * for a specific regulator and mode BASE_* and OFFSET_* need to be added. |
35 | * |
36 | * Operating modes: |
37 | * In order for the PMIC to transition to operating modes it has to be |
38 | * controlled via GPIO lines called LPM and HPM. |
39 | * |
40 | * The registers are fully configurable such that you can put all regulators in |
41 | * a low-power state while the PMIC is in Active mode. They are supposed to be |
42 | * configured at startup and then simply transition to/from a global low-power |
43 | * state by setting the GPIO lpm pin high/low. |
44 | * |
45 | * This driver keeps the PMIC in Active mode, Low-power state is set for the |
46 | * regulators by enabling/disabling operating mode (FPWM or Auto PFM). |
47 | * |
48 | * The PMIC's Low-power and Hibernate modes are used during standby/suspend. |
49 | * To enter standby/suspend the PMIC will go to Low-power mode. From there, it |
50 | * will transition to Hibernate when the PWRHLD line is set to low by the MPU. |
51 | */ |
52 | |
53 | /* |
54 | * This function is useful for iterating over all regulators and accessing their |
55 | * registers in a generic way or accessing a regulator device by its id. |
56 | */ |
57 | #define MCP16502_REG_BASE(i, r) ((((i) + 1) << 4) + MCP16502_REG_##r) |
58 | #define MCP16502_STAT_BASE(i) ((i) + 5) |
59 | |
60 | #define MCP16502_OPMODE_ACTIVE REGULATOR_MODE_NORMAL |
61 | #define MCP16502_OPMODE_LPM REGULATOR_MODE_IDLE |
62 | #define MCP16502_OPMODE_HIB REGULATOR_MODE_STANDBY |
63 | |
64 | #define MCP16502_MODE_AUTO_PFM 0 |
65 | #define MCP16502_MODE_FPWM BIT(6) |
66 | |
67 | #define MCP16502_VSEL 0x3F |
68 | #define MCP16502_EN BIT(7) |
69 | #define MCP16502_MODE BIT(6) |
70 | |
71 | #define MCP16502_MIN_REG 0x0 |
72 | #define MCP16502_MAX_REG 0x65 |
73 | |
74 | /** |
75 | * enum mcp16502_reg - MCP16502 regulators's registers |
76 | * @MCP16502_REG_A: active state register |
77 | * @MCP16502_REG_LPM: low power mode state register |
78 | * @MCP16502_REG_HIB: hibernate state register |
79 | * @MCP16502_REG_HPM: high-performance mode register |
80 | * @MCP16502_REG_SEQ: startup sequence register |
81 | * @MCP16502_REG_CFG: configuration register |
82 | */ |
83 | enum mcp16502_reg { |
84 | MCP16502_REG_A, |
85 | MCP16502_REG_LPM, |
86 | MCP16502_REG_HIB, |
87 | MCP16502_REG_HPM, |
88 | MCP16502_REG_SEQ, |
89 | MCP16502_REG_CFG, |
90 | }; |
91 | |
92 | /* Ramp delay (uV/us) for buck1, ldo1, ldo2. */ |
93 | static const unsigned int mcp16502_ramp_b1l12[] = { |
94 | 6250, 3125, 2083, 1563 |
95 | }; |
96 | |
97 | /* Ramp delay (uV/us) for buck2, buck3, buck4. */ |
98 | static const unsigned int mcp16502_ramp_b234[] = { |
99 | 3125, 1563, 1042, 781 |
100 | }; |
101 | |
102 | static unsigned int mcp16502_of_map_mode(unsigned int mode) |
103 | { |
104 | if (mode == REGULATOR_MODE_NORMAL || mode == REGULATOR_MODE_IDLE) |
105 | return mode; |
106 | |
107 | return REGULATOR_MODE_INVALID; |
108 | } |
109 | |
110 | #define MCP16502_REGULATOR(_name, _id, _ranges, _ops, _ramp_table) \ |
111 | [_id] = { \ |
112 | .name = _name, \ |
113 | .regulators_node = "regulators", \ |
114 | .id = _id, \ |
115 | .ops = &(_ops), \ |
116 | .type = REGULATOR_VOLTAGE, \ |
117 | .owner = THIS_MODULE, \ |
118 | .n_voltages = MCP16502_VSEL + 1, \ |
119 | .linear_ranges = _ranges, \ |
120 | .linear_min_sel = VDD_LOW_SEL, \ |
121 | .n_linear_ranges = ARRAY_SIZE(_ranges), \ |
122 | .of_match = _name, \ |
123 | .of_map_mode = mcp16502_of_map_mode, \ |
124 | .vsel_reg = (((_id) + 1) << 4), \ |
125 | .vsel_mask = MCP16502_VSEL, \ |
126 | .enable_reg = (((_id) + 1) << 4), \ |
127 | .enable_mask = MCP16502_EN, \ |
128 | .ramp_reg = MCP16502_REG_BASE(_id, CFG), \ |
129 | .ramp_mask = MCP16502_DVSR, \ |
130 | .ramp_delay_table = _ramp_table, \ |
131 | .n_ramp_values = ARRAY_SIZE(_ramp_table), \ |
132 | } |
133 | |
134 | enum { |
135 | BUCK1 = 0, |
136 | BUCK2, |
137 | BUCK3, |
138 | BUCK4, |
139 | LDO1, |
140 | LDO2, |
141 | NUM_REGULATORS |
142 | }; |
143 | |
144 | /* |
145 | * struct mcp16502 - PMIC representation |
146 | * @lpm: LPM GPIO descriptor |
147 | */ |
148 | struct mcp16502 { |
149 | struct gpio_desc *lpm; |
150 | }; |
151 | |
152 | /* |
153 | * mcp16502_gpio_set_mode() - set the GPIO corresponding value |
154 | * |
155 | * Used to prepare transitioning into hibernate or resuming from it. |
156 | */ |
157 | static void mcp16502_gpio_set_mode(struct mcp16502 *mcp, int mode) |
158 | { |
159 | switch (mode) { |
160 | case MCP16502_OPMODE_ACTIVE: |
161 | gpiod_set_value(desc: mcp->lpm, value: 0); |
162 | break; |
163 | case MCP16502_OPMODE_LPM: |
164 | case MCP16502_OPMODE_HIB: |
165 | gpiod_set_value(desc: mcp->lpm, value: 1); |
166 | break; |
167 | default: |
168 | pr_err("%s: %d invalid\n" , __func__, mode); |
169 | } |
170 | } |
171 | |
172 | /* |
173 | * mcp16502_get_reg() - get the PMIC's state configuration register for opmode |
174 | * |
175 | * @rdev: the regulator whose register we are searching |
176 | * @opmode: the PMIC's operating mode ACTIVE, Low-power, Hibernate |
177 | */ |
178 | static int mcp16502_get_state_reg(struct regulator_dev *rdev, int opmode) |
179 | { |
180 | switch (opmode) { |
181 | case MCP16502_OPMODE_ACTIVE: |
182 | return MCP16502_REG_BASE(rdev_get_id(rdev), A); |
183 | case MCP16502_OPMODE_LPM: |
184 | return MCP16502_REG_BASE(rdev_get_id(rdev), LPM); |
185 | case MCP16502_OPMODE_HIB: |
186 | return MCP16502_REG_BASE(rdev_get_id(rdev), HIB); |
187 | default: |
188 | return -EINVAL; |
189 | } |
190 | } |
191 | |
192 | /* |
193 | * mcp16502_get_mode() - return the current operating mode of a regulator |
194 | * |
195 | * Note: all functions that are not part of entering/exiting standby/suspend |
196 | * use the Active mode registers. |
197 | * |
198 | * Note: this is different from the PMIC's operatig mode, it is the |
199 | * MODE bit from the regulator's register. |
200 | */ |
201 | static unsigned int mcp16502_get_mode(struct regulator_dev *rdev) |
202 | { |
203 | unsigned int val; |
204 | int ret, reg; |
205 | |
206 | reg = mcp16502_get_state_reg(rdev, MCP16502_OPMODE_ACTIVE); |
207 | if (reg < 0) |
208 | return reg; |
209 | |
210 | ret = regmap_read(map: rdev->regmap, reg, val: &val); |
211 | if (ret) |
212 | return ret; |
213 | |
214 | switch (val & MCP16502_MODE) { |
215 | case MCP16502_MODE_FPWM: |
216 | return REGULATOR_MODE_NORMAL; |
217 | case MCP16502_MODE_AUTO_PFM: |
218 | return REGULATOR_MODE_IDLE; |
219 | default: |
220 | return REGULATOR_MODE_INVALID; |
221 | } |
222 | } |
223 | |
224 | /* |
225 | * _mcp16502_set_mode() - helper for set_mode and set_suspend_mode |
226 | * |
227 | * @rdev: the regulator for which we are setting the mode |
228 | * @mode: the regulator's mode (the one from MODE bit) |
229 | * @opmode: the PMIC's operating mode: Active/Low-power/Hibernate |
230 | */ |
231 | static int _mcp16502_set_mode(struct regulator_dev *rdev, unsigned int mode, |
232 | unsigned int op_mode) |
233 | { |
234 | int val; |
235 | int reg; |
236 | |
237 | reg = mcp16502_get_state_reg(rdev, opmode: op_mode); |
238 | if (reg < 0) |
239 | return reg; |
240 | |
241 | switch (mode) { |
242 | case REGULATOR_MODE_NORMAL: |
243 | val = MCP16502_MODE_FPWM; |
244 | break; |
245 | case REGULATOR_MODE_IDLE: |
246 | val = MCP16502_MODE_AUTO_PFM; |
247 | break; |
248 | default: |
249 | return -EINVAL; |
250 | } |
251 | |
252 | reg = regmap_update_bits(map: rdev->regmap, reg, MCP16502_MODE, val); |
253 | return reg; |
254 | } |
255 | |
256 | /* |
257 | * mcp16502_set_mode() - regulator_ops set_mode |
258 | */ |
259 | static int mcp16502_set_mode(struct regulator_dev *rdev, unsigned int mode) |
260 | { |
261 | return _mcp16502_set_mode(rdev, mode, MCP16502_OPMODE_ACTIVE); |
262 | } |
263 | |
264 | /* |
265 | * mcp16502_get_status() - regulator_ops get_status |
266 | */ |
267 | static int mcp16502_get_status(struct regulator_dev *rdev) |
268 | { |
269 | int ret; |
270 | unsigned int val; |
271 | |
272 | ret = regmap_read(map: rdev->regmap, MCP16502_STAT_BASE(rdev_get_id(rdev)), |
273 | val: &val); |
274 | if (ret) |
275 | return ret; |
276 | |
277 | if (val & MCP16502_FLT) |
278 | return REGULATOR_STATUS_ERROR; |
279 | else if (val & MCP16502_ENS) |
280 | return REGULATOR_STATUS_ON; |
281 | else if (!(val & MCP16502_ENS)) |
282 | return REGULATOR_STATUS_OFF; |
283 | |
284 | return REGULATOR_STATUS_UNDEFINED; |
285 | } |
286 | |
287 | static int mcp16502_set_voltage_time_sel(struct regulator_dev *rdev, |
288 | unsigned int old_sel, |
289 | unsigned int new_sel) |
290 | { |
291 | static const u8 us_ramp[] = { 8, 16, 24, 32 }; |
292 | int id = rdev_get_id(rdev); |
293 | unsigned int uV_delta, val; |
294 | int ret; |
295 | |
296 | ret = regmap_read(map: rdev->regmap, MCP16502_REG_BASE(id, CFG), val: &val); |
297 | if (ret) |
298 | return ret; |
299 | |
300 | val = (val & MCP16502_DVSR) >> 2; |
301 | uV_delta = abs(new_sel * rdev->desc->linear_ranges->step - |
302 | old_sel * rdev->desc->linear_ranges->step); |
303 | switch (id) { |
304 | case BUCK1: |
305 | case LDO1: |
306 | case LDO2: |
307 | ret = DIV_ROUND_CLOSEST(uV_delta * us_ramp[val], |
308 | mcp16502_ramp_b1l12[val]); |
309 | break; |
310 | |
311 | case BUCK2: |
312 | case BUCK3: |
313 | case BUCK4: |
314 | ret = DIV_ROUND_CLOSEST(uV_delta * us_ramp[val], |
315 | mcp16502_ramp_b234[val]); |
316 | break; |
317 | |
318 | default: |
319 | return -EINVAL; |
320 | } |
321 | |
322 | return ret; |
323 | } |
324 | |
325 | #ifdef CONFIG_SUSPEND |
326 | /* |
327 | * mcp16502_suspend_get_target_reg() - get the reg of the target suspend PMIC |
328 | * mode |
329 | */ |
330 | static int mcp16502_suspend_get_target_reg(struct regulator_dev *rdev) |
331 | { |
332 | switch (pm_suspend_target_state) { |
333 | case PM_SUSPEND_STANDBY: |
334 | return mcp16502_get_state_reg(rdev, MCP16502_OPMODE_LPM); |
335 | case PM_SUSPEND_ON: |
336 | case PM_SUSPEND_MEM: |
337 | return mcp16502_get_state_reg(rdev, MCP16502_OPMODE_HIB); |
338 | default: |
339 | dev_err(&rdev->dev, "invalid suspend target: %d\n" , |
340 | pm_suspend_target_state); |
341 | } |
342 | |
343 | return -EINVAL; |
344 | } |
345 | |
346 | /* |
347 | * mcp16502_set_suspend_voltage() - regulator_ops set_suspend_voltage |
348 | */ |
349 | static int mcp16502_set_suspend_voltage(struct regulator_dev *rdev, int uV) |
350 | { |
351 | int sel = regulator_map_voltage_linear_range(rdev, min_uV: uV, max_uV: uV); |
352 | int reg = mcp16502_suspend_get_target_reg(rdev); |
353 | |
354 | if (sel < 0) |
355 | return sel; |
356 | |
357 | if (reg < 0) |
358 | return reg; |
359 | |
360 | return regmap_update_bits(map: rdev->regmap, reg, MCP16502_VSEL, val: sel); |
361 | } |
362 | |
363 | /* |
364 | * mcp16502_set_suspend_mode() - regulator_ops set_suspend_mode |
365 | */ |
366 | static int mcp16502_set_suspend_mode(struct regulator_dev *rdev, |
367 | unsigned int mode) |
368 | { |
369 | switch (pm_suspend_target_state) { |
370 | case PM_SUSPEND_STANDBY: |
371 | return _mcp16502_set_mode(rdev, mode, MCP16502_OPMODE_LPM); |
372 | case PM_SUSPEND_ON: |
373 | case PM_SUSPEND_MEM: |
374 | return _mcp16502_set_mode(rdev, mode, MCP16502_OPMODE_HIB); |
375 | default: |
376 | dev_err(&rdev->dev, "invalid suspend target: %d\n" , |
377 | pm_suspend_target_state); |
378 | } |
379 | |
380 | return -EINVAL; |
381 | } |
382 | |
383 | /* |
384 | * mcp16502_set_suspend_enable() - regulator_ops set_suspend_enable |
385 | */ |
386 | static int mcp16502_set_suspend_enable(struct regulator_dev *rdev) |
387 | { |
388 | int reg = mcp16502_suspend_get_target_reg(rdev); |
389 | |
390 | if (reg < 0) |
391 | return reg; |
392 | |
393 | return regmap_update_bits(map: rdev->regmap, reg, MCP16502_EN, MCP16502_EN); |
394 | } |
395 | |
396 | /* |
397 | * mcp16502_set_suspend_disable() - regulator_ops set_suspend_disable |
398 | */ |
399 | static int mcp16502_set_suspend_disable(struct regulator_dev *rdev) |
400 | { |
401 | int reg = mcp16502_suspend_get_target_reg(rdev); |
402 | |
403 | if (reg < 0) |
404 | return reg; |
405 | |
406 | return regmap_update_bits(map: rdev->regmap, reg, MCP16502_EN, val: 0); |
407 | } |
408 | #endif /* CONFIG_SUSPEND */ |
409 | |
410 | static const struct regulator_ops mcp16502_buck_ops = { |
411 | .list_voltage = regulator_list_voltage_linear_range, |
412 | .map_voltage = regulator_map_voltage_linear_range, |
413 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
414 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
415 | .enable = regulator_enable_regmap, |
416 | .disable = regulator_disable_regmap, |
417 | .is_enabled = regulator_is_enabled_regmap, |
418 | .get_status = mcp16502_get_status, |
419 | .set_voltage_time_sel = mcp16502_set_voltage_time_sel, |
420 | .set_ramp_delay = regulator_set_ramp_delay_regmap, |
421 | |
422 | .set_mode = mcp16502_set_mode, |
423 | .get_mode = mcp16502_get_mode, |
424 | |
425 | #ifdef CONFIG_SUSPEND |
426 | .set_suspend_voltage = mcp16502_set_suspend_voltage, |
427 | .set_suspend_mode = mcp16502_set_suspend_mode, |
428 | .set_suspend_enable = mcp16502_set_suspend_enable, |
429 | .set_suspend_disable = mcp16502_set_suspend_disable, |
430 | #endif /* CONFIG_SUSPEND */ |
431 | }; |
432 | |
433 | /* |
434 | * LDOs cannot change operating modes. |
435 | */ |
436 | static const struct regulator_ops mcp16502_ldo_ops = { |
437 | .list_voltage = regulator_list_voltage_linear_range, |
438 | .map_voltage = regulator_map_voltage_linear_range, |
439 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
440 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
441 | .enable = regulator_enable_regmap, |
442 | .disable = regulator_disable_regmap, |
443 | .is_enabled = regulator_is_enabled_regmap, |
444 | .get_status = mcp16502_get_status, |
445 | .set_voltage_time_sel = mcp16502_set_voltage_time_sel, |
446 | .set_ramp_delay = regulator_set_ramp_delay_regmap, |
447 | |
448 | #ifdef CONFIG_SUSPEND |
449 | .set_suspend_voltage = mcp16502_set_suspend_voltage, |
450 | .set_suspend_enable = mcp16502_set_suspend_enable, |
451 | .set_suspend_disable = mcp16502_set_suspend_disable, |
452 | #endif /* CONFIG_SUSPEND */ |
453 | }; |
454 | |
455 | static const struct of_device_id mcp16502_ids[] = { |
456 | { .compatible = "microchip,mcp16502" , }, |
457 | {} |
458 | }; |
459 | MODULE_DEVICE_TABLE(of, mcp16502_ids); |
460 | |
461 | static const struct linear_range b1l12_ranges[] = { |
462 | REGULATOR_LINEAR_RANGE(1200000, VDD_LOW_SEL, VDD_HIGH_SEL, 50000), |
463 | }; |
464 | |
465 | static const struct linear_range b234_ranges[] = { |
466 | REGULATOR_LINEAR_RANGE(600000, VDD_LOW_SEL, VDD_HIGH_SEL, 25000), |
467 | }; |
468 | |
469 | static const struct regulator_desc mcp16502_desc[] = { |
470 | /* MCP16502_REGULATOR(_name, _id, ranges, regulator_ops, ramp_table) */ |
471 | MCP16502_REGULATOR("VDD_IO" , BUCK1, b1l12_ranges, mcp16502_buck_ops, |
472 | mcp16502_ramp_b1l12), |
473 | MCP16502_REGULATOR("VDD_DDR" , BUCK2, b234_ranges, mcp16502_buck_ops, |
474 | mcp16502_ramp_b234), |
475 | MCP16502_REGULATOR("VDD_CORE" , BUCK3, b234_ranges, mcp16502_buck_ops, |
476 | mcp16502_ramp_b234), |
477 | MCP16502_REGULATOR("VDD_OTHER" , BUCK4, b234_ranges, mcp16502_buck_ops, |
478 | mcp16502_ramp_b234), |
479 | MCP16502_REGULATOR("LDO1" , LDO1, b1l12_ranges, mcp16502_ldo_ops, |
480 | mcp16502_ramp_b1l12), |
481 | MCP16502_REGULATOR("LDO2" , LDO2, b1l12_ranges, mcp16502_ldo_ops, |
482 | mcp16502_ramp_b1l12) |
483 | }; |
484 | |
485 | static const struct regmap_range mcp16502_ranges[] = { |
486 | regmap_reg_range(MCP16502_MIN_REG, MCP16502_MAX_REG) |
487 | }; |
488 | |
489 | static const struct regmap_access_table mcp16502_yes_reg_table = { |
490 | .yes_ranges = mcp16502_ranges, |
491 | .n_yes_ranges = ARRAY_SIZE(mcp16502_ranges), |
492 | }; |
493 | |
494 | static const struct regmap_config mcp16502_regmap_config = { |
495 | .reg_bits = 8, |
496 | .val_bits = 8, |
497 | .max_register = MCP16502_MAX_REG, |
498 | .cache_type = REGCACHE_NONE, |
499 | .rd_table = &mcp16502_yes_reg_table, |
500 | .wr_table = &mcp16502_yes_reg_table, |
501 | }; |
502 | |
503 | static int mcp16502_probe(struct i2c_client *client) |
504 | { |
505 | struct regulator_config config = { }; |
506 | struct regulator_dev *rdev; |
507 | struct device *dev; |
508 | struct mcp16502 *mcp; |
509 | struct regmap *rmap; |
510 | int i, ret; |
511 | |
512 | dev = &client->dev; |
513 | config.dev = dev; |
514 | |
515 | mcp = devm_kzalloc(dev, size: sizeof(*mcp), GFP_KERNEL); |
516 | if (!mcp) |
517 | return -ENOMEM; |
518 | |
519 | rmap = devm_regmap_init_i2c(client, &mcp16502_regmap_config); |
520 | if (IS_ERR(ptr: rmap)) { |
521 | ret = PTR_ERR(ptr: rmap); |
522 | dev_err(dev, "regmap init failed: %d\n" , ret); |
523 | return ret; |
524 | } |
525 | |
526 | i2c_set_clientdata(client, data: mcp); |
527 | config.regmap = rmap; |
528 | config.driver_data = mcp; |
529 | |
530 | mcp->lpm = devm_gpiod_get_optional(dev, con_id: "lpm" , flags: GPIOD_OUT_LOW); |
531 | if (IS_ERR(ptr: mcp->lpm)) { |
532 | dev_err(dev, "failed to get lpm pin: %ld\n" , PTR_ERR(mcp->lpm)); |
533 | return PTR_ERR(ptr: mcp->lpm); |
534 | } |
535 | |
536 | for (i = 0; i < NUM_REGULATORS; i++) { |
537 | rdev = devm_regulator_register(dev, regulator_desc: &mcp16502_desc[i], config: &config); |
538 | if (IS_ERR(ptr: rdev)) { |
539 | dev_err(dev, |
540 | "failed to register %s regulator %ld\n" , |
541 | mcp16502_desc[i].name, PTR_ERR(rdev)); |
542 | return PTR_ERR(ptr: rdev); |
543 | } |
544 | } |
545 | |
546 | mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_ACTIVE); |
547 | |
548 | return 0; |
549 | } |
550 | |
551 | #ifdef CONFIG_PM_SLEEP |
552 | static int mcp16502_suspend_noirq(struct device *dev) |
553 | { |
554 | struct i2c_client *client = to_i2c_client(dev); |
555 | struct mcp16502 *mcp = i2c_get_clientdata(client); |
556 | |
557 | mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_LPM); |
558 | |
559 | return 0; |
560 | } |
561 | |
562 | static int mcp16502_resume_noirq(struct device *dev) |
563 | { |
564 | struct i2c_client *client = to_i2c_client(dev); |
565 | struct mcp16502 *mcp = i2c_get_clientdata(client); |
566 | |
567 | mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_ACTIVE); |
568 | |
569 | return 0; |
570 | } |
571 | #endif |
572 | |
573 | #ifdef CONFIG_PM |
574 | static const struct dev_pm_ops mcp16502_pm_ops = { |
575 | SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mcp16502_suspend_noirq, |
576 | mcp16502_resume_noirq) |
577 | }; |
578 | #endif |
579 | static const struct i2c_device_id mcp16502_i2c_id[] = { |
580 | { "mcp16502" , 0 }, |
581 | { } |
582 | }; |
583 | MODULE_DEVICE_TABLE(i2c, mcp16502_i2c_id); |
584 | |
585 | static struct i2c_driver mcp16502_drv = { |
586 | .probe = mcp16502_probe, |
587 | .driver = { |
588 | .name = "mcp16502-regulator" , |
589 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
590 | .of_match_table = mcp16502_ids, |
591 | #ifdef CONFIG_PM |
592 | .pm = &mcp16502_pm_ops, |
593 | #endif |
594 | }, |
595 | .id_table = mcp16502_i2c_id, |
596 | }; |
597 | |
598 | module_i2c_driver(mcp16502_drv); |
599 | |
600 | MODULE_LICENSE("GPL v2" ); |
601 | MODULE_DESCRIPTION("MCP16502 PMIC driver" ); |
602 | MODULE_AUTHOR("Andrei Stefanescu andrei.stefanescu@microchip.com" ); |
603 | |