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1 | /* |
2 | * max77802.c - Regulator driver for the Maxim 77802 | |
3 | * | |
4 | * Copyright (C) 2013-2014 Google, Inc | |
5 | * Simon Glass <sjg@chromium.org> | |
6 | * | |
7 | * Copyright (C) 2012 Samsung Electronics | |
8 | * Chiwoong Byun <woong.byun@smasung.com> | |
9 | * Jonghwa Lee <jonghwa3.lee@samsung.com> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * This driver is based on max8997.c | |
22 | */ | |
23 | ||
24 | #include <linux/kernel.h> | |
25 | #include <linux/bug.h> | |
26 | #include <linux/err.h> | |
27 | #include <linux/gpio.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/gpio/consumer.h> | |
30 | #include <linux/platform_device.h> | |
31 | #include <linux/regulator/driver.h> | |
32 | #include <linux/regulator/machine.h> | |
33 | #include <linux/regulator/of_regulator.h> | |
34 | #include <linux/mfd/max77686.h> | |
35 | #include <linux/mfd/max77686-private.h> | |
36 | ||
37 | /* Default ramp delay in case it is not manually set */ | |
38 | #define MAX77802_RAMP_DELAY 100000 /* uV/us */ | |
39 | ||
40 | #define MAX77802_OPMODE_SHIFT_LDO 6 | |
41 | #define MAX77802_OPMODE_BUCK234_SHIFT 4 | |
42 | #define MAX77802_OPMODE_MASK 0x3 | |
43 | ||
44 | #define MAX77802_VSEL_MASK 0x3F | |
45 | #define MAX77802_DVS_VSEL_MASK 0xFF | |
46 | ||
47 | #define MAX77802_RAMP_RATE_MASK_2BIT 0xC0 | |
48 | #define MAX77802_RAMP_RATE_SHIFT_2BIT 6 | |
49 | #define MAX77802_RAMP_RATE_MASK_4BIT 0xF0 | |
50 | #define MAX77802_RAMP_RATE_SHIFT_4BIT 4 | |
51 | ||
52 | /* MAX77802 has two register formats: 2-bit and 4-bit */ | |
53 | static const unsigned int ramp_table_77802_2bit[] = { | |
54 | 12500, | |
55 | 25000, | |
56 | 50000, | |
57 | 100000, | |
58 | }; | |
59 | ||
60 | static unsigned int ramp_table_77802_4bit[] = { | |
61 | 1000, 2000, 3030, 4000, | |
62 | 5000, 5880, 7140, 8330, | |
63 | 9090, 10000, 11110, 12500, | |
64 | 16670, 25000, 50000, 100000, | |
65 | }; | |
66 | ||
67 | struct max77802_regulator_prv { | |
e6f2f805 JMC |
68 | unsigned int opmode[MAX77802_REG_MAX]; |
69 | }; | |
70 | ||
71 | static int max77802_get_opmode_shift(int id) | |
72 | { | |
73 | if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 && | |
74 | id <= MAX77802_BUCK10)) | |
75 | return 0; | |
76 | ||
77 | if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4) | |
78 | return MAX77802_OPMODE_BUCK234_SHIFT; | |
79 | ||
80 | if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35) | |
81 | return MAX77802_OPMODE_SHIFT_LDO; | |
82 | ||
83 | return -EINVAL; | |
84 | } | |
85 | ||
86 | /* | |
87 | * Some BUCKS supports Normal[ON/OFF] mode during suspend | |
88 | * | |
89 | * BUCK 1, 6, 2-4, 5, 7-10 (all) | |
90 | * | |
91 | * The other mode (0x02) will make PWRREQ switch between normal | |
92 | * and low power. | |
93 | */ | |
94 | static int max77802_buck_set_suspend_disable(struct regulator_dev *rdev) | |
95 | { | |
96 | unsigned int val = MAX77802_OPMODE_STANDBY; | |
97 | struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); | |
98 | int id = rdev_get_id(rdev); | |
99 | int shift = max77802_get_opmode_shift(id); | |
100 | ||
101 | max77802->opmode[id] = val; | |
102 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
103 | rdev->desc->enable_mask, val << shift); | |
104 | } | |
105 | ||
106 | /* | |
107 | * Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state | |
108 | * (Enable Control Logic1 by PWRREQ) | |
109 | * | |
110 | * LDOs 2, 4-19, 22-35. | |
111 | * | |
112 | */ | |
113 | static int max77802_ldo_set_suspend_mode_logic1(struct regulator_dev *rdev, | |
114 | unsigned int mode) | |
115 | { | |
116 | struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); | |
117 | int id = rdev_get_id(rdev); | |
118 | unsigned int val; | |
119 | int shift = max77802_get_opmode_shift(id); | |
120 | ||
121 | switch (mode) { | |
122 | case REGULATOR_MODE_IDLE: /* ON in LP Mode */ | |
123 | val = MAX77802_OPMODE_LP; | |
124 | break; | |
125 | case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */ | |
126 | val = MAX77802_OPMODE_NORMAL; | |
127 | break; | |
128 | case REGULATOR_MODE_STANDBY: /* ON/OFF by PWRREQ */ | |
129 | val = MAX77802_OPMODE_STANDBY; | |
130 | break; | |
131 | default: | |
132 | dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", | |
133 | rdev->desc->name, mode); | |
134 | return -EINVAL; | |
135 | } | |
136 | ||
da0bb557 | 137 | max77802->opmode[id] = val; |
e6f2f805 JMC |
138 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, |
139 | rdev->desc->enable_mask, val << shift); | |
140 | } | |
141 | ||
142 | /* | |
143 | * Mode 1 (Output[ON/OFF] by PWRREQ) is not supported on some LDOs | |
144 | * (Enable Control Logic2 by PWRREQ) | |
145 | * | |
146 | * LDOs 1, 20, 21, and 3, | |
147 | * | |
148 | */ | |
149 | static int max77802_ldo_set_suspend_mode_logic2(struct regulator_dev *rdev, | |
150 | unsigned int mode) | |
151 | { | |
152 | struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); | |
153 | int id = rdev_get_id(rdev); | |
154 | unsigned int val; | |
155 | int shift = max77802_get_opmode_shift(id); | |
156 | ||
157 | switch (mode) { | |
158 | case REGULATOR_MODE_IDLE: /* ON in LP Mode */ | |
159 | val = MAX77802_OPMODE_LP; | |
160 | break; | |
161 | case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */ | |
162 | val = MAX77802_OPMODE_NORMAL; | |
163 | break; | |
164 | default: | |
165 | dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", | |
166 | rdev->desc->name, mode); | |
167 | return -EINVAL; | |
168 | } | |
169 | ||
da0bb557 | 170 | max77802->opmode[id] = val; |
e6f2f805 JMC |
171 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, |
172 | rdev->desc->enable_mask, val << shift); | |
173 | } | |
174 | ||
175 | static int max77802_enable(struct regulator_dev *rdev) | |
176 | { | |
177 | struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); | |
178 | int id = rdev_get_id(rdev); | |
179 | int shift = max77802_get_opmode_shift(id); | |
180 | ||
181 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
182 | rdev->desc->enable_mask, | |
183 | max77802->opmode[id] << shift); | |
184 | } | |
185 | ||
186 | static int max77802_find_ramp_value(struct regulator_dev *rdev, | |
187 | const unsigned int limits[], int size, | |
188 | unsigned int ramp_delay) | |
189 | { | |
190 | int i; | |
191 | ||
192 | for (i = 0; i < size; i++) { | |
193 | if (ramp_delay <= limits[i]) | |
194 | return i; | |
195 | } | |
196 | ||
197 | /* Use maximum value for no ramp control */ | |
198 | dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n", | |
199 | rdev->desc->name, ramp_delay); | |
200 | return size - 1; | |
201 | } | |
202 | ||
203 | /* Used for BUCKs 2-4 */ | |
204 | static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev, | |
205 | int ramp_delay) | |
206 | { | |
207 | int id = rdev_get_id(rdev); | |
208 | unsigned int ramp_value; | |
209 | ||
210 | if (id > MAX77802_BUCK4) { | |
211 | dev_warn(&rdev->dev, | |
212 | "%s: regulator: ramp delay not supported\n", | |
213 | rdev->desc->name); | |
214 | return -EINVAL; | |
215 | } | |
216 | ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit, | |
217 | ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay); | |
218 | ||
219 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
220 | MAX77802_RAMP_RATE_MASK_2BIT, | |
221 | ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT); | |
222 | } | |
223 | ||
224 | /* For BUCK1, 6 */ | |
225 | static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev, | |
226 | int ramp_delay) | |
227 | { | |
228 | unsigned int ramp_value; | |
229 | ||
230 | ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit, | |
231 | ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay); | |
232 | ||
233 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
234 | MAX77802_RAMP_RATE_MASK_4BIT, | |
235 | ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT); | |
236 | } | |
237 | ||
238 | /* | |
239 | * LDOs 2, 4-19, 22-35 | |
240 | */ | |
241 | static struct regulator_ops max77802_ldo_ops_logic1 = { | |
242 | .list_voltage = regulator_list_voltage_linear, | |
243 | .map_voltage = regulator_map_voltage_linear, | |
244 | .is_enabled = regulator_is_enabled_regmap, | |
245 | .enable = max77802_enable, | |
246 | .disable = regulator_disable_regmap, | |
247 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
248 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
249 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
250 | .set_suspend_mode = max77802_ldo_set_suspend_mode_logic1, | |
251 | }; | |
252 | ||
253 | /* | |
254 | * LDOs 1, 20, 21, 3 | |
255 | */ | |
256 | static struct regulator_ops max77802_ldo_ops_logic2 = { | |
257 | .list_voltage = regulator_list_voltage_linear, | |
258 | .map_voltage = regulator_map_voltage_linear, | |
259 | .is_enabled = regulator_is_enabled_regmap, | |
260 | .enable = max77802_enable, | |
261 | .disable = regulator_disable_regmap, | |
262 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
263 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
264 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
265 | .set_suspend_mode = max77802_ldo_set_suspend_mode_logic2, | |
266 | }; | |
267 | ||
268 | /* BUCKS 1, 6 */ | |
269 | static struct regulator_ops max77802_buck_16_dvs_ops = { | |
270 | .list_voltage = regulator_list_voltage_linear, | |
271 | .map_voltage = regulator_map_voltage_linear, | |
272 | .is_enabled = regulator_is_enabled_regmap, | |
273 | .enable = max77802_enable, | |
274 | .disable = regulator_disable_regmap, | |
275 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
276 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
277 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
278 | .set_ramp_delay = max77802_set_ramp_delay_4bit, | |
279 | .set_suspend_disable = max77802_buck_set_suspend_disable, | |
280 | }; | |
281 | ||
282 | /* BUCKs 2-4, 5, 7-10 */ | |
283 | static struct regulator_ops max77802_buck_dvs_ops = { | |
284 | .list_voltage = regulator_list_voltage_linear, | |
285 | .map_voltage = regulator_map_voltage_linear, | |
286 | .is_enabled = regulator_is_enabled_regmap, | |
287 | .enable = max77802_enable, | |
288 | .disable = regulator_disable_regmap, | |
289 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
290 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
291 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
292 | .set_ramp_delay = max77802_set_ramp_delay_2bit, | |
293 | .set_suspend_disable = max77802_buck_set_suspend_disable, | |
294 | }; | |
295 | ||
296 | /* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */ | |
297 | #define regulator_77802_desc_p_ldo(num, supply, log) { \ | |
298 | .name = "LDO"#num, \ | |
299 | .id = MAX77802_LDO##num, \ | |
300 | .supply_name = "inl"#supply, \ | |
301 | .ops = &max77802_ldo_ops_logic##log, \ | |
302 | .type = REGULATOR_VOLTAGE, \ | |
303 | .owner = THIS_MODULE, \ | |
304 | .min_uV = 800000, \ | |
305 | .uV_step = 50000, \ | |
306 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
307 | .n_voltages = 1 << 6, \ | |
308 | .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ | |
309 | .vsel_mask = MAX77802_VSEL_MASK, \ | |
310 | .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ | |
311 | .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ | |
312 | } | |
313 | ||
314 | /* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */ | |
315 | #define regulator_77802_desc_n_ldo(num, supply, log) { \ | |
316 | .name = "LDO"#num, \ | |
317 | .id = MAX77802_LDO##num, \ | |
318 | .supply_name = "inl"#supply, \ | |
319 | .ops = &max77802_ldo_ops_logic##log, \ | |
320 | .type = REGULATOR_VOLTAGE, \ | |
321 | .owner = THIS_MODULE, \ | |
322 | .min_uV = 800000, \ | |
323 | .uV_step = 25000, \ | |
324 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
325 | .n_voltages = 1 << 6, \ | |
326 | .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ | |
327 | .vsel_mask = MAX77802_VSEL_MASK, \ | |
328 | .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ | |
329 | .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ | |
330 | } | |
331 | ||
332 | /* BUCKs 1, 6 */ | |
333 | #define regulator_77802_desc_16_buck(num) { \ | |
334 | .name = "BUCK"#num, \ | |
335 | .id = MAX77802_BUCK##num, \ | |
336 | .supply_name = "inb"#num, \ | |
337 | .ops = &max77802_buck_16_dvs_ops, \ | |
338 | .type = REGULATOR_VOLTAGE, \ | |
339 | .owner = THIS_MODULE, \ | |
340 | .min_uV = 612500, \ | |
341 | .uV_step = 6250, \ | |
342 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
343 | .n_voltages = 1 << 8, \ | |
344 | .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ | |
345 | .vsel_mask = MAX77802_DVS_VSEL_MASK, \ | |
346 | .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \ | |
347 | .enable_mask = MAX77802_OPMODE_MASK, \ | |
348 | } | |
349 | ||
350 | /* BUCKS 2-4 */ | |
351 | #define regulator_77802_desc_234_buck(num) { \ | |
352 | .name = "BUCK"#num, \ | |
353 | .id = MAX77802_BUCK##num, \ | |
354 | .supply_name = "inb"#num, \ | |
355 | .ops = &max77802_buck_dvs_ops, \ | |
356 | .type = REGULATOR_VOLTAGE, \ | |
357 | .owner = THIS_MODULE, \ | |
358 | .min_uV = 600000, \ | |
359 | .uV_step = 6250, \ | |
360 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
361 | .n_voltages = 0x91, \ | |
362 | .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ | |
363 | .vsel_mask = MAX77802_DVS_VSEL_MASK, \ | |
364 | .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \ | |
365 | .enable_mask = MAX77802_OPMODE_MASK << \ | |
366 | MAX77802_OPMODE_BUCK234_SHIFT, \ | |
367 | } | |
368 | ||
369 | /* BUCK 5 */ | |
370 | #define regulator_77802_desc_buck5(num) { \ | |
371 | .name = "BUCK"#num, \ | |
372 | .id = MAX77802_BUCK##num, \ | |
373 | .supply_name = "inb"#num, \ | |
374 | .ops = &max77802_buck_dvs_ops, \ | |
375 | .type = REGULATOR_VOLTAGE, \ | |
376 | .owner = THIS_MODULE, \ | |
377 | .min_uV = 750000, \ | |
378 | .uV_step = 50000, \ | |
379 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
380 | .n_voltages = 1 << 6, \ | |
381 | .vsel_reg = MAX77802_REG_BUCK5OUT, \ | |
382 | .vsel_mask = MAX77802_VSEL_MASK, \ | |
383 | .enable_reg = MAX77802_REG_BUCK5CTRL, \ | |
384 | .enable_mask = MAX77802_OPMODE_MASK, \ | |
385 | } | |
386 | ||
387 | /* BUCKs 7-10 */ | |
388 | #define regulator_77802_desc_buck7_10(num) { \ | |
389 | .name = "BUCK"#num, \ | |
390 | .id = MAX77802_BUCK##num, \ | |
391 | .supply_name = "inb"#num, \ | |
392 | .ops = &max77802_buck_dvs_ops, \ | |
393 | .type = REGULATOR_VOLTAGE, \ | |
394 | .owner = THIS_MODULE, \ | |
395 | .min_uV = 750000, \ | |
396 | .uV_step = 50000, \ | |
397 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
398 | .n_voltages = 1 << 6, \ | |
399 | .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \ | |
400 | .vsel_mask = MAX77802_VSEL_MASK, \ | |
401 | .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \ | |
402 | .enable_mask = MAX77802_OPMODE_MASK, \ | |
403 | } | |
404 | ||
405 | static struct regulator_desc regulators[] = { | |
406 | regulator_77802_desc_16_buck(1), | |
407 | regulator_77802_desc_234_buck(2), | |
408 | regulator_77802_desc_234_buck(3), | |
409 | regulator_77802_desc_234_buck(4), | |
410 | regulator_77802_desc_buck5(5), | |
411 | regulator_77802_desc_16_buck(6), | |
412 | regulator_77802_desc_buck7_10(7), | |
413 | regulator_77802_desc_buck7_10(8), | |
414 | regulator_77802_desc_buck7_10(9), | |
415 | regulator_77802_desc_buck7_10(10), | |
416 | regulator_77802_desc_n_ldo(1, 10, 2), | |
417 | regulator_77802_desc_n_ldo(2, 10, 1), | |
418 | regulator_77802_desc_p_ldo(3, 3, 2), | |
419 | regulator_77802_desc_p_ldo(4, 6, 1), | |
420 | regulator_77802_desc_p_ldo(5, 3, 1), | |
421 | regulator_77802_desc_p_ldo(6, 3, 1), | |
422 | regulator_77802_desc_p_ldo(7, 3, 1), | |
423 | regulator_77802_desc_n_ldo(8, 1, 1), | |
424 | regulator_77802_desc_p_ldo(9, 5, 1), | |
425 | regulator_77802_desc_p_ldo(10, 4, 1), | |
426 | regulator_77802_desc_p_ldo(11, 4, 1), | |
427 | regulator_77802_desc_p_ldo(12, 9, 1), | |
428 | regulator_77802_desc_p_ldo(13, 4, 1), | |
429 | regulator_77802_desc_p_ldo(14, 4, 1), | |
430 | regulator_77802_desc_n_ldo(15, 1, 1), | |
431 | regulator_77802_desc_n_ldo(17, 2, 1), | |
432 | regulator_77802_desc_p_ldo(18, 7, 1), | |
433 | regulator_77802_desc_p_ldo(19, 5, 1), | |
434 | regulator_77802_desc_p_ldo(20, 7, 2), | |
435 | regulator_77802_desc_p_ldo(21, 6, 2), | |
436 | regulator_77802_desc_p_ldo(23, 9, 1), | |
437 | regulator_77802_desc_p_ldo(24, 6, 1), | |
438 | regulator_77802_desc_p_ldo(25, 9, 1), | |
439 | regulator_77802_desc_p_ldo(26, 9, 1), | |
440 | regulator_77802_desc_n_ldo(27, 2, 1), | |
441 | regulator_77802_desc_p_ldo(28, 7, 1), | |
442 | regulator_77802_desc_p_ldo(29, 7, 1), | |
443 | regulator_77802_desc_n_ldo(30, 2, 1), | |
444 | regulator_77802_desc_p_ldo(32, 9, 1), | |
445 | regulator_77802_desc_p_ldo(33, 6, 1), | |
446 | regulator_77802_desc_p_ldo(34, 9, 1), | |
447 | regulator_77802_desc_n_ldo(35, 2, 1), | |
448 | }; | |
449 | ||
450 | #ifdef CONFIG_OF | |
451 | static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev, | |
452 | struct max77686_platform_data *pdata) | |
453 | { | |
454 | struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
455 | struct device_node *pmic_np, *regulators_np; | |
456 | struct max77686_regulator_data *rdata; | |
457 | struct of_regulator_match rmatch; | |
458 | unsigned int i; | |
459 | ||
460 | pmic_np = iodev->dev->of_node; | |
461 | regulators_np = of_get_child_by_name(pmic_np, "regulators"); | |
462 | if (!regulators_np) { | |
463 | dev_err(&pdev->dev, "could not find regulators sub-node\n"); | |
464 | return -EINVAL; | |
465 | } | |
466 | ||
467 | pdata->num_regulators = ARRAY_SIZE(regulators); | |
468 | rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) * | |
469 | pdata->num_regulators, GFP_KERNEL); | |
470 | if (!rdata) { | |
471 | of_node_put(regulators_np); | |
472 | return -ENOMEM; | |
473 | } | |
474 | ||
475 | for (i = 0; i < pdata->num_regulators; i++) { | |
476 | rmatch.name = regulators[i].name; | |
477 | rmatch.init_data = NULL; | |
478 | rmatch.of_node = NULL; | |
479 | if (of_regulator_match(&pdev->dev, regulators_np, &rmatch, | |
480 | 1) != 1) { | |
481 | dev_warn(&pdev->dev, "No matching regulator for '%s'\n", | |
482 | rmatch.name); | |
483 | continue; | |
484 | } | |
485 | rdata[i].initdata = rmatch.init_data; | |
486 | rdata[i].of_node = rmatch.of_node; | |
487 | rdata[i].id = regulators[i].id; | |
488 | } | |
489 | ||
490 | pdata->regulators = rdata; | |
491 | of_node_put(regulators_np); | |
492 | ||
493 | return 0; | |
494 | } | |
495 | #else | |
496 | static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev, | |
497 | struct max77686_platform_data *pdata) | |
498 | { | |
499 | return 0; | |
500 | } | |
501 | #endif /* CONFIG_OF */ | |
502 | ||
503 | static int max77802_pmic_probe(struct platform_device *pdev) | |
504 | { | |
505 | struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
506 | struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev); | |
507 | struct max77802_regulator_prv *max77802; | |
508 | int i, ret = 0, val; | |
509 | struct regulator_config config = { }; | |
510 | ||
511 | /* This is allocated by the MFD driver */ | |
512 | if (!pdata) { | |
513 | dev_err(&pdev->dev, "no platform data found for regulator\n"); | |
514 | return -ENODEV; | |
515 | } | |
516 | ||
517 | max77802 = devm_kzalloc(&pdev->dev, | |
518 | sizeof(struct max77802_regulator_prv), | |
519 | GFP_KERNEL); | |
520 | if (!max77802) | |
521 | return -ENOMEM; | |
522 | ||
523 | if (iodev->dev->of_node) { | |
524 | ret = max77802_pmic_dt_parse_pdata(pdev, pdata); | |
525 | if (ret) | |
526 | return ret; | |
527 | } | |
528 | ||
529 | config.dev = iodev->dev; | |
530 | config.regmap = iodev->regmap; | |
531 | config.driver_data = max77802; | |
532 | platform_set_drvdata(pdev, max77802); | |
533 | ||
534 | for (i = 0; i < MAX77802_REG_MAX; i++) { | |
535 | struct regulator_dev *rdev; | |
536 | int id = pdata->regulators[i].id; | |
537 | int shift = max77802_get_opmode_shift(id); | |
538 | ||
539 | config.init_data = pdata->regulators[i].initdata; | |
540 | config.of_node = pdata->regulators[i].of_node; | |
541 | ||
542 | ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val); | |
aea8dfb9 JMC |
543 | val = val >> shift & MAX77802_OPMODE_MASK; |
544 | ||
545 | /* | |
546 | * If the regulator is disabled and the system warm rebooted, | |
547 | * the hardware reports OFF as the regulator operating mode. | |
548 | * Default to operating mode NORMAL in that case. | |
549 | */ | |
550 | if (val == MAX77802_OPMODE_OFF) | |
551 | max77802->opmode[id] = MAX77802_OPMODE_NORMAL; | |
552 | else | |
553 | max77802->opmode[id] = val; | |
e6f2f805 JMC |
554 | |
555 | rdev = devm_regulator_register(&pdev->dev, | |
556 | ®ulators[i], &config); | |
557 | if (IS_ERR(rdev)) { | |
558 | dev_err(&pdev->dev, | |
559 | "regulator init failed for %d\n", i); | |
560 | return PTR_ERR(rdev); | |
561 | } | |
562 | } | |
563 | ||
564 | return 0; | |
565 | } | |
566 | ||
567 | static const struct platform_device_id max77802_pmic_id[] = { | |
568 | {"max77802-pmic", 0}, | |
569 | { }, | |
570 | }; | |
571 | MODULE_DEVICE_TABLE(platform, max77802_pmic_id); | |
572 | ||
573 | static struct platform_driver max77802_pmic_driver = { | |
574 | .driver = { | |
575 | .name = "max77802-pmic", | |
576 | .owner = THIS_MODULE, | |
577 | }, | |
578 | .probe = max77802_pmic_probe, | |
579 | .id_table = max77802_pmic_id, | |
580 | }; | |
581 | ||
582 | module_platform_driver(max77802_pmic_driver); | |
583 | ||
584 | MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver"); | |
585 | MODULE_AUTHOR("Simon Glass <sjg@chromium.org>"); | |
586 | MODULE_LICENSE("GPL"); |