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919261c0 AS |
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 | ||
919261c0 AS |
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> | |
f3c6a1a1 | 19 | #include <linux/gpio/consumer.h> |
919261c0 AS |
20 | |
21 | #define VDD_LOW_SEL 0x0D | |
22 | #define VDD_HIGH_SEL 0x3F | |
23 | ||
322eb866 CB |
24 | #define MCP16502_FLT BIT(7) |
25 | #define MCP16502_DVSR GENMASK(3, 2) | |
26 | #define MCP16502_ENS BIT(0) | |
919261c0 AS |
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 | */ | |
3e5532a0 | 57 | #define MCP16502_REG_BASE(i, r) ((((i) + 1) << 4) + MCP16502_REG_##r) |
919261c0 AS |
58 | #define MCP16502_STAT_BASE(i) ((i) + 5) |
59 | ||
919261c0 AS |
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 | ||
3e5532a0 CB |
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 | |
84c13763 | 79 | * @MCP16502_REG_HPM: high-performance mode register |
3e5532a0 CB |
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 | ||
322eb866 | 92 | /* Ramp delay (uV/us) for buck1, ldo1, ldo2. */ |
96ec5afe AL |
93 | static const unsigned int mcp16502_ramp_b1l12[] = { |
94 | 6250, 3125, 2083, 1563 | |
95 | }; | |
322eb866 CB |
96 | |
97 | /* Ramp delay (uV/us) for buck2, buck3, buck4. */ | |
96ec5afe AL |
98 | static const unsigned int mcp16502_ramp_b234[] = { |
99 | 3125, 1563, 1042, 781 | |
100 | }; | |
322eb866 | 101 | |
919261c0 AS |
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 | ||
96ec5afe | 110 | #define MCP16502_REGULATOR(_name, _id, _ranges, _ops, _ramp_table) \ |
919261c0 AS |
111 | [_id] = { \ |
112 | .name = _name, \ | |
3988795e | 113 | .regulators_node = "regulators", \ |
919261c0 AS |
114 | .id = _id, \ |
115 | .ops = &(_ops), \ | |
116 | .type = REGULATOR_VOLTAGE, \ | |
117 | .owner = THIS_MODULE, \ | |
f4c8f980 | 118 | .n_voltages = MCP16502_VSEL + 1, \ |
919261c0 | 119 | .linear_ranges = _ranges, \ |
478f8089 | 120 | .linear_min_sel = VDD_LOW_SEL, \ |
919261c0 | 121 | .n_linear_ranges = ARRAY_SIZE(_ranges), \ |
3988795e | 122 | .of_match = _name, \ |
919261c0 AS |
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, \ | |
96ec5afe AL |
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), \ | |
919261c0 AS |
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 | |
919261c0 AS |
146 | * @lpm: LPM GPIO descriptor |
147 | */ | |
148 | struct mcp16502 { | |
919261c0 AS |
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(mcp->lpm, 0); | |
162 | break; | |
163 | case MCP16502_OPMODE_LPM: | |
164 | case MCP16502_OPMODE_HIB: | |
165 | gpiod_set_value(mcp->lpm, 1); | |
166 | break; | |
167 | default: | |
168 | pr_err("%s: %d invalid\n", __func__, mode); | |
169 | } | |
170 | } | |
171 | ||
172 | /* | |
3e5532a0 | 173 | * mcp16502_get_reg() - get the PMIC's state configuration register for opmode |
919261c0 AS |
174 | * |
175 | * @rdev: the regulator whose register we are searching | |
176 | * @opmode: the PMIC's operating mode ACTIVE, Low-power, Hibernate | |
177 | */ | |
3e5532a0 | 178 | static int mcp16502_get_state_reg(struct regulator_dev *rdev, int opmode) |
919261c0 | 179 | { |
919261c0 AS |
180 | switch (opmode) { |
181 | case MCP16502_OPMODE_ACTIVE: | |
3e5532a0 | 182 | return MCP16502_REG_BASE(rdev_get_id(rdev), A); |
919261c0 | 183 | case MCP16502_OPMODE_LPM: |
3e5532a0 | 184 | return MCP16502_REG_BASE(rdev_get_id(rdev), LPM); |
919261c0 | 185 | case MCP16502_OPMODE_HIB: |
3e5532a0 | 186 | return MCP16502_REG_BASE(rdev_get_id(rdev), HIB); |
919261c0 AS |
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; | |
919261c0 | 205 | |
3e5532a0 | 206 | reg = mcp16502_get_state_reg(rdev, MCP16502_OPMODE_ACTIVE); |
919261c0 AS |
207 | if (reg < 0) |
208 | return reg; | |
209 | ||
4cf46953 | 210 | ret = regmap_read(rdev->regmap, reg, &val); |
919261c0 AS |
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; | |
919261c0 | 236 | |
3e5532a0 | 237 | reg = mcp16502_get_state_reg(rdev, op_mode); |
919261c0 AS |
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 | ||
4cf46953 | 252 | reg = regmap_update_bits(rdev->regmap, reg, MCP16502_MODE, val); |
919261c0 AS |
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; | |
919261c0 | 271 | |
4cf46953 | 272 | ret = regmap_read(rdev->regmap, MCP16502_STAT_BASE(rdev_get_id(rdev)), |
919261c0 AS |
273 | &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 | ||
322eb866 CB |
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(rdev->regmap, MCP16502_REG_BASE(id, CFG), &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 | ||
919261c0 AS |
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: | |
3e5532a0 | 334 | return mcp16502_get_state_reg(rdev, MCP16502_OPMODE_LPM); |
919261c0 AS |
335 | case PM_SUSPEND_ON: |
336 | case PM_SUSPEND_MEM: | |
3e5532a0 | 337 | return mcp16502_get_state_reg(rdev, MCP16502_OPMODE_HIB); |
919261c0 AS |
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 | { | |
919261c0 AS |
351 | int sel = regulator_map_voltage_linear_range(rdev, 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 | ||
4cf46953 | 360 | return regmap_update_bits(rdev->regmap, reg, MCP16502_VSEL, sel); |
919261c0 AS |
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 | { | |
919261c0 AS |
388 | int reg = mcp16502_suspend_get_target_reg(rdev); |
389 | ||
390 | if (reg < 0) | |
391 | return reg; | |
392 | ||
4cf46953 | 393 | return regmap_update_bits(rdev->regmap, reg, MCP16502_EN, MCP16502_EN); |
919261c0 AS |
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 | { | |
919261c0 AS |
401 | int reg = mcp16502_suspend_get_target_reg(rdev); |
402 | ||
403 | if (reg < 0) | |
404 | return reg; | |
405 | ||
4cf46953 | 406 | return regmap_update_bits(rdev->regmap, reg, MCP16502_EN, 0); |
919261c0 AS |
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, | |
322eb866 | 419 | .set_voltage_time_sel = mcp16502_set_voltage_time_sel, |
96ec5afe | 420 | .set_ramp_delay = regulator_set_ramp_delay_regmap, |
919261c0 AS |
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, | |
322eb866 | 445 | .set_voltage_time_sel = mcp16502_set_voltage_time_sel, |
96ec5afe | 446 | .set_ramp_delay = regulator_set_ramp_delay_regmap, |
919261c0 AS |
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 | ||
60ab7f41 | 461 | static const struct linear_range b1l12_ranges[] = { |
919261c0 AS |
462 | REGULATOR_LINEAR_RANGE(1200000, VDD_LOW_SEL, VDD_HIGH_SEL, 50000), |
463 | }; | |
464 | ||
60ab7f41 | 465 | static const struct linear_range b234_ranges[] = { |
919261c0 AS |
466 | REGULATOR_LINEAR_RANGE(600000, VDD_LOW_SEL, VDD_HIGH_SEL, 25000), |
467 | }; | |
468 | ||
469 | static const struct regulator_desc mcp16502_desc[] = { | |
96ec5afe AL |
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) | |
919261c0 AS |
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 | ||
1d15b3e6 | 503 | static int mcp16502_probe(struct i2c_client *client) |
919261c0 AS |
504 | { |
505 | struct regulator_config config = { }; | |
784c24c3 | 506 | struct regulator_dev *rdev; |
919261c0 AS |
507 | struct device *dev; |
508 | struct mcp16502 *mcp; | |
4cf46953 | 509 | struct regmap *rmap; |
784c24c3 | 510 | int i, ret; |
919261c0 AS |
511 | |
512 | dev = &client->dev; | |
513 | config.dev = dev; | |
514 | ||
515 | mcp = devm_kzalloc(dev, sizeof(*mcp), GFP_KERNEL); | |
516 | if (!mcp) | |
517 | return -ENOMEM; | |
518 | ||
4cf46953 AL |
519 | rmap = devm_regmap_init_i2c(client, &mcp16502_regmap_config); |
520 | if (IS_ERR(rmap)) { | |
521 | ret = PTR_ERR(rmap); | |
919261c0 AS |
522 | dev_err(dev, "regmap init failed: %d\n", ret); |
523 | return ret; | |
524 | } | |
525 | ||
526 | i2c_set_clientdata(client, mcp); | |
4cf46953 | 527 | config.regmap = rmap; |
919261c0 AS |
528 | config.driver_data = mcp; |
529 | ||
3c42728c | 530 | mcp->lpm = devm_gpiod_get_optional(dev, "lpm", GPIOD_OUT_LOW); |
919261c0 AS |
531 | if (IS_ERR(mcp->lpm)) { |
532 | dev_err(dev, "failed to get lpm pin: %ld\n", PTR_ERR(mcp->lpm)); | |
533 | return PTR_ERR(mcp->lpm); | |
534 | } | |
535 | ||
784c24c3 AL |
536 | for (i = 0; i < NUM_REGULATORS; i++) { |
537 | rdev = devm_regulator_register(dev, &mcp16502_desc[i], &config); | |
538 | if (IS_ERR(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(rdev); | |
543 | } | |
544 | } | |
919261c0 AS |
545 | |
546 | mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_ACTIVE); | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
4906d091 | 551 | #ifdef CONFIG_PM_SLEEP |
fc401cb9 AS |
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 | } | |
4906d091 | 571 | #endif |
fc401cb9 AS |
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, | |
308144ce | 576 | mcp16502_resume_noirq) |
fc401cb9 AS |
577 | }; |
578 | #endif | |
919261c0 AS |
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 = { | |
964e1865 | 586 | .probe = mcp16502_probe, |
919261c0 AS |
587 | .driver = { |
588 | .name = "mcp16502-regulator", | |
d3b81d97 | 589 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
3988795e | 590 | .of_match_table = mcp16502_ids, |
fc401cb9 AS |
591 | #ifdef CONFIG_PM |
592 | .pm = &mcp16502_pm_ops, | |
593 | #endif | |
919261c0 AS |
594 | }, |
595 | .id_table = mcp16502_i2c_id, | |
596 | }; | |
597 | ||
598 | module_i2c_driver(mcp16502_drv); | |
599 | ||
919261c0 AS |
600 | MODULE_LICENSE("GPL v2"); |
601 | MODULE_DESCRIPTION("MCP16502 PMIC driver"); | |
602 | MODULE_AUTHOR("Andrei Stefanescu andrei.stefanescu@microchip.com"); |