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e6f2f805 JMC |
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 | ||
e6fb2aac JMC |
52 | #define MAX77802_OFF_PWRREQ 0x1 |
53 | ||
e6f2f805 JMC |
54 | /* MAX77802 has two register formats: 2-bit and 4-bit */ |
55 | static const unsigned int ramp_table_77802_2bit[] = { | |
56 | 12500, | |
57 | 25000, | |
58 | 50000, | |
59 | 100000, | |
60 | }; | |
61 | ||
62 | static unsigned int ramp_table_77802_4bit[] = { | |
63 | 1000, 2000, 3030, 4000, | |
64 | 5000, 5880, 7140, 8330, | |
65 | 9090, 10000, 11110, 12500, | |
66 | 16670, 25000, 50000, 100000, | |
67 | }; | |
68 | ||
69 | struct max77802_regulator_prv { | |
e6f2f805 JMC |
70 | unsigned int opmode[MAX77802_REG_MAX]; |
71 | }; | |
72 | ||
73 | static int max77802_get_opmode_shift(int id) | |
74 | { | |
75 | if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 && | |
76 | id <= MAX77802_BUCK10)) | |
77 | return 0; | |
78 | ||
79 | if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4) | |
80 | return MAX77802_OPMODE_BUCK234_SHIFT; | |
81 | ||
82 | if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35) | |
83 | return MAX77802_OPMODE_SHIFT_LDO; | |
84 | ||
85 | return -EINVAL; | |
86 | } | |
87 | ||
e6fb2aac JMC |
88 | /** |
89 | * max77802_set_suspend_disable - Disable the regulator during system suspend | |
90 | * @rdev: regulator to mark as disabled | |
e6f2f805 | 91 | * |
e6fb2aac JMC |
92 | * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ. |
93 | * Configure the regulator so the PMIC will turn it OFF during system suspend. | |
e6f2f805 | 94 | */ |
e6fb2aac | 95 | static int max77802_set_suspend_disable(struct regulator_dev *rdev) |
e6f2f805 | 96 | { |
e6fb2aac | 97 | unsigned int val = MAX77802_OFF_PWRREQ; |
e6f2f805 JMC |
98 | struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); |
99 | int id = rdev_get_id(rdev); | |
100 | int shift = max77802_get_opmode_shift(id); | |
101 | ||
102 | max77802->opmode[id] = val; | |
103 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
104 | rdev->desc->enable_mask, val << shift); | |
105 | } | |
106 | ||
107 | /* | |
108 | * Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state | |
109 | * (Enable Control Logic1 by PWRREQ) | |
110 | * | |
111 | * LDOs 2, 4-19, 22-35. | |
112 | * | |
113 | */ | |
114 | static int max77802_ldo_set_suspend_mode_logic1(struct regulator_dev *rdev, | |
115 | unsigned int mode) | |
116 | { | |
117 | struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); | |
118 | int id = rdev_get_id(rdev); | |
119 | unsigned int val; | |
120 | int shift = max77802_get_opmode_shift(id); | |
121 | ||
122 | switch (mode) { | |
123 | case REGULATOR_MODE_IDLE: /* ON in LP Mode */ | |
124 | val = MAX77802_OPMODE_LP; | |
125 | break; | |
126 | case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */ | |
127 | val = MAX77802_OPMODE_NORMAL; | |
128 | break; | |
129 | case REGULATOR_MODE_STANDBY: /* ON/OFF by PWRREQ */ | |
130 | val = MAX77802_OPMODE_STANDBY; | |
131 | break; | |
132 | default: | |
133 | dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", | |
134 | rdev->desc->name, mode); | |
135 | return -EINVAL; | |
136 | } | |
137 | ||
da0bb557 | 138 | max77802->opmode[id] = val; |
e6f2f805 JMC |
139 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, |
140 | rdev->desc->enable_mask, val << shift); | |
141 | } | |
142 | ||
143 | /* | |
144 | * Mode 1 (Output[ON/OFF] by PWRREQ) is not supported on some LDOs | |
145 | * (Enable Control Logic2 by PWRREQ) | |
146 | * | |
147 | * LDOs 1, 20, 21, and 3, | |
148 | * | |
149 | */ | |
150 | static int max77802_ldo_set_suspend_mode_logic2(struct regulator_dev *rdev, | |
151 | unsigned int mode) | |
152 | { | |
153 | struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); | |
154 | int id = rdev_get_id(rdev); | |
155 | unsigned int val; | |
156 | int shift = max77802_get_opmode_shift(id); | |
157 | ||
158 | switch (mode) { | |
159 | case REGULATOR_MODE_IDLE: /* ON in LP Mode */ | |
160 | val = MAX77802_OPMODE_LP; | |
161 | break; | |
162 | case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */ | |
163 | val = MAX77802_OPMODE_NORMAL; | |
164 | break; | |
165 | default: | |
166 | dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", | |
167 | rdev->desc->name, mode); | |
168 | return -EINVAL; | |
169 | } | |
170 | ||
da0bb557 | 171 | max77802->opmode[id] = val; |
e6f2f805 JMC |
172 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, |
173 | rdev->desc->enable_mask, val << shift); | |
174 | } | |
175 | ||
176 | static int max77802_enable(struct regulator_dev *rdev) | |
177 | { | |
178 | struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); | |
179 | int id = rdev_get_id(rdev); | |
180 | int shift = max77802_get_opmode_shift(id); | |
181 | ||
e6fb2aac JMC |
182 | if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) |
183 | max77802->opmode[id] = MAX77802_OPMODE_NORMAL; | |
184 | ||
e6f2f805 JMC |
185 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, |
186 | rdev->desc->enable_mask, | |
187 | max77802->opmode[id] << shift); | |
188 | } | |
189 | ||
190 | static int max77802_find_ramp_value(struct regulator_dev *rdev, | |
191 | const unsigned int limits[], int size, | |
192 | unsigned int ramp_delay) | |
193 | { | |
194 | int i; | |
195 | ||
196 | for (i = 0; i < size; i++) { | |
197 | if (ramp_delay <= limits[i]) | |
198 | return i; | |
199 | } | |
200 | ||
201 | /* Use maximum value for no ramp control */ | |
202 | dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n", | |
203 | rdev->desc->name, ramp_delay); | |
204 | return size - 1; | |
205 | } | |
206 | ||
207 | /* Used for BUCKs 2-4 */ | |
208 | static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev, | |
209 | int ramp_delay) | |
210 | { | |
211 | int id = rdev_get_id(rdev); | |
212 | unsigned int ramp_value; | |
213 | ||
214 | if (id > MAX77802_BUCK4) { | |
215 | dev_warn(&rdev->dev, | |
216 | "%s: regulator: ramp delay not supported\n", | |
217 | rdev->desc->name); | |
218 | return -EINVAL; | |
219 | } | |
220 | ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit, | |
221 | ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay); | |
222 | ||
223 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
224 | MAX77802_RAMP_RATE_MASK_2BIT, | |
225 | ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT); | |
226 | } | |
227 | ||
228 | /* For BUCK1, 6 */ | |
229 | static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev, | |
230 | int ramp_delay) | |
231 | { | |
232 | unsigned int ramp_value; | |
233 | ||
234 | ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit, | |
235 | ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay); | |
236 | ||
237 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
238 | MAX77802_RAMP_RATE_MASK_4BIT, | |
239 | ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT); | |
240 | } | |
241 | ||
242 | /* | |
243 | * LDOs 2, 4-19, 22-35 | |
244 | */ | |
245 | static struct regulator_ops max77802_ldo_ops_logic1 = { | |
246 | .list_voltage = regulator_list_voltage_linear, | |
247 | .map_voltage = regulator_map_voltage_linear, | |
248 | .is_enabled = regulator_is_enabled_regmap, | |
249 | .enable = max77802_enable, | |
250 | .disable = regulator_disable_regmap, | |
251 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
252 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
253 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
e6fb2aac JMC |
254 | .set_suspend_enable = max77802_enable, |
255 | .set_suspend_disable = max77802_set_suspend_disable, | |
e6f2f805 JMC |
256 | .set_suspend_mode = max77802_ldo_set_suspend_mode_logic1, |
257 | }; | |
258 | ||
259 | /* | |
260 | * LDOs 1, 20, 21, 3 | |
261 | */ | |
262 | static struct regulator_ops max77802_ldo_ops_logic2 = { | |
263 | .list_voltage = regulator_list_voltage_linear, | |
264 | .map_voltage = regulator_map_voltage_linear, | |
265 | .is_enabled = regulator_is_enabled_regmap, | |
266 | .enable = max77802_enable, | |
267 | .disable = regulator_disable_regmap, | |
268 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
269 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
270 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
271 | .set_suspend_mode = max77802_ldo_set_suspend_mode_logic2, | |
272 | }; | |
273 | ||
274 | /* BUCKS 1, 6 */ | |
275 | static struct regulator_ops max77802_buck_16_dvs_ops = { | |
276 | .list_voltage = regulator_list_voltage_linear, | |
277 | .map_voltage = regulator_map_voltage_linear, | |
278 | .is_enabled = regulator_is_enabled_regmap, | |
279 | .enable = max77802_enable, | |
280 | .disable = regulator_disable_regmap, | |
281 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
282 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
283 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
284 | .set_ramp_delay = max77802_set_ramp_delay_4bit, | |
e6fb2aac JMC |
285 | .set_suspend_enable = max77802_enable, |
286 | .set_suspend_disable = max77802_set_suspend_disable, | |
e6f2f805 JMC |
287 | }; |
288 | ||
b0615f1d JMC |
289 | /* BUCKs 2-4 */ |
290 | static struct regulator_ops max77802_buck_234_ops = { | |
291 | .list_voltage = regulator_list_voltage_linear, | |
292 | .map_voltage = regulator_map_voltage_linear, | |
293 | .is_enabled = regulator_is_enabled_regmap, | |
294 | .enable = max77802_enable, | |
295 | .disable = regulator_disable_regmap, | |
296 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
297 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
298 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
299 | .set_ramp_delay = max77802_set_ramp_delay_2bit, | |
300 | .set_suspend_enable = max77802_enable, | |
301 | .set_suspend_disable = max77802_set_suspend_disable, | |
302 | }; | |
303 | ||
304 | /* BUCKs 5, 7-10 */ | |
e6f2f805 JMC |
305 | static struct regulator_ops max77802_buck_dvs_ops = { |
306 | .list_voltage = regulator_list_voltage_linear, | |
307 | .map_voltage = regulator_map_voltage_linear, | |
308 | .is_enabled = regulator_is_enabled_regmap, | |
309 | .enable = max77802_enable, | |
310 | .disable = regulator_disable_regmap, | |
311 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
312 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
313 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
314 | .set_ramp_delay = max77802_set_ramp_delay_2bit, | |
e6fb2aac JMC |
315 | .set_suspend_enable = max77802_enable, |
316 | .set_suspend_disable = max77802_set_suspend_disable, | |
e6f2f805 JMC |
317 | }; |
318 | ||
319 | /* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */ | |
320 | #define regulator_77802_desc_p_ldo(num, supply, log) { \ | |
321 | .name = "LDO"#num, \ | |
322 | .id = MAX77802_LDO##num, \ | |
323 | .supply_name = "inl"#supply, \ | |
324 | .ops = &max77802_ldo_ops_logic##log, \ | |
325 | .type = REGULATOR_VOLTAGE, \ | |
326 | .owner = THIS_MODULE, \ | |
327 | .min_uV = 800000, \ | |
328 | .uV_step = 50000, \ | |
329 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
330 | .n_voltages = 1 << 6, \ | |
331 | .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ | |
332 | .vsel_mask = MAX77802_VSEL_MASK, \ | |
333 | .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ | |
334 | .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ | |
335 | } | |
336 | ||
337 | /* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */ | |
338 | #define regulator_77802_desc_n_ldo(num, supply, log) { \ | |
339 | .name = "LDO"#num, \ | |
340 | .id = MAX77802_LDO##num, \ | |
341 | .supply_name = "inl"#supply, \ | |
342 | .ops = &max77802_ldo_ops_logic##log, \ | |
343 | .type = REGULATOR_VOLTAGE, \ | |
344 | .owner = THIS_MODULE, \ | |
345 | .min_uV = 800000, \ | |
346 | .uV_step = 25000, \ | |
347 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
348 | .n_voltages = 1 << 6, \ | |
349 | .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ | |
350 | .vsel_mask = MAX77802_VSEL_MASK, \ | |
351 | .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ | |
352 | .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ | |
353 | } | |
354 | ||
355 | /* BUCKs 1, 6 */ | |
356 | #define regulator_77802_desc_16_buck(num) { \ | |
357 | .name = "BUCK"#num, \ | |
358 | .id = MAX77802_BUCK##num, \ | |
359 | .supply_name = "inb"#num, \ | |
360 | .ops = &max77802_buck_16_dvs_ops, \ | |
361 | .type = REGULATOR_VOLTAGE, \ | |
362 | .owner = THIS_MODULE, \ | |
363 | .min_uV = 612500, \ | |
364 | .uV_step = 6250, \ | |
365 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
366 | .n_voltages = 1 << 8, \ | |
367 | .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ | |
368 | .vsel_mask = MAX77802_DVS_VSEL_MASK, \ | |
369 | .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \ | |
370 | .enable_mask = MAX77802_OPMODE_MASK, \ | |
371 | } | |
372 | ||
373 | /* BUCKS 2-4 */ | |
374 | #define regulator_77802_desc_234_buck(num) { \ | |
375 | .name = "BUCK"#num, \ | |
376 | .id = MAX77802_BUCK##num, \ | |
377 | .supply_name = "inb"#num, \ | |
b0615f1d | 378 | .ops = &max77802_buck_234_ops, \ |
e6f2f805 JMC |
379 | .type = REGULATOR_VOLTAGE, \ |
380 | .owner = THIS_MODULE, \ | |
381 | .min_uV = 600000, \ | |
382 | .uV_step = 6250, \ | |
383 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
384 | .n_voltages = 0x91, \ | |
385 | .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ | |
386 | .vsel_mask = MAX77802_DVS_VSEL_MASK, \ | |
387 | .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \ | |
388 | .enable_mask = MAX77802_OPMODE_MASK << \ | |
389 | MAX77802_OPMODE_BUCK234_SHIFT, \ | |
390 | } | |
391 | ||
392 | /* BUCK 5 */ | |
393 | #define regulator_77802_desc_buck5(num) { \ | |
394 | .name = "BUCK"#num, \ | |
395 | .id = MAX77802_BUCK##num, \ | |
396 | .supply_name = "inb"#num, \ | |
397 | .ops = &max77802_buck_dvs_ops, \ | |
398 | .type = REGULATOR_VOLTAGE, \ | |
399 | .owner = THIS_MODULE, \ | |
400 | .min_uV = 750000, \ | |
401 | .uV_step = 50000, \ | |
402 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
403 | .n_voltages = 1 << 6, \ | |
404 | .vsel_reg = MAX77802_REG_BUCK5OUT, \ | |
405 | .vsel_mask = MAX77802_VSEL_MASK, \ | |
406 | .enable_reg = MAX77802_REG_BUCK5CTRL, \ | |
407 | .enable_mask = MAX77802_OPMODE_MASK, \ | |
408 | } | |
409 | ||
410 | /* BUCKs 7-10 */ | |
411 | #define regulator_77802_desc_buck7_10(num) { \ | |
412 | .name = "BUCK"#num, \ | |
413 | .id = MAX77802_BUCK##num, \ | |
414 | .supply_name = "inb"#num, \ | |
415 | .ops = &max77802_buck_dvs_ops, \ | |
416 | .type = REGULATOR_VOLTAGE, \ | |
417 | .owner = THIS_MODULE, \ | |
418 | .min_uV = 750000, \ | |
419 | .uV_step = 50000, \ | |
420 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
421 | .n_voltages = 1 << 6, \ | |
422 | .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \ | |
423 | .vsel_mask = MAX77802_VSEL_MASK, \ | |
424 | .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \ | |
425 | .enable_mask = MAX77802_OPMODE_MASK, \ | |
426 | } | |
427 | ||
428 | static struct regulator_desc regulators[] = { | |
429 | regulator_77802_desc_16_buck(1), | |
430 | regulator_77802_desc_234_buck(2), | |
431 | regulator_77802_desc_234_buck(3), | |
432 | regulator_77802_desc_234_buck(4), | |
433 | regulator_77802_desc_buck5(5), | |
434 | regulator_77802_desc_16_buck(6), | |
435 | regulator_77802_desc_buck7_10(7), | |
436 | regulator_77802_desc_buck7_10(8), | |
437 | regulator_77802_desc_buck7_10(9), | |
438 | regulator_77802_desc_buck7_10(10), | |
439 | regulator_77802_desc_n_ldo(1, 10, 2), | |
440 | regulator_77802_desc_n_ldo(2, 10, 1), | |
441 | regulator_77802_desc_p_ldo(3, 3, 2), | |
442 | regulator_77802_desc_p_ldo(4, 6, 1), | |
443 | regulator_77802_desc_p_ldo(5, 3, 1), | |
444 | regulator_77802_desc_p_ldo(6, 3, 1), | |
445 | regulator_77802_desc_p_ldo(7, 3, 1), | |
446 | regulator_77802_desc_n_ldo(8, 1, 1), | |
447 | regulator_77802_desc_p_ldo(9, 5, 1), | |
448 | regulator_77802_desc_p_ldo(10, 4, 1), | |
449 | regulator_77802_desc_p_ldo(11, 4, 1), | |
450 | regulator_77802_desc_p_ldo(12, 9, 1), | |
451 | regulator_77802_desc_p_ldo(13, 4, 1), | |
452 | regulator_77802_desc_p_ldo(14, 4, 1), | |
453 | regulator_77802_desc_n_ldo(15, 1, 1), | |
454 | regulator_77802_desc_n_ldo(17, 2, 1), | |
455 | regulator_77802_desc_p_ldo(18, 7, 1), | |
456 | regulator_77802_desc_p_ldo(19, 5, 1), | |
457 | regulator_77802_desc_p_ldo(20, 7, 2), | |
458 | regulator_77802_desc_p_ldo(21, 6, 2), | |
459 | regulator_77802_desc_p_ldo(23, 9, 1), | |
460 | regulator_77802_desc_p_ldo(24, 6, 1), | |
461 | regulator_77802_desc_p_ldo(25, 9, 1), | |
462 | regulator_77802_desc_p_ldo(26, 9, 1), | |
463 | regulator_77802_desc_n_ldo(27, 2, 1), | |
464 | regulator_77802_desc_p_ldo(28, 7, 1), | |
465 | regulator_77802_desc_p_ldo(29, 7, 1), | |
466 | regulator_77802_desc_n_ldo(30, 2, 1), | |
467 | regulator_77802_desc_p_ldo(32, 9, 1), | |
468 | regulator_77802_desc_p_ldo(33, 6, 1), | |
469 | regulator_77802_desc_p_ldo(34, 9, 1), | |
470 | regulator_77802_desc_n_ldo(35, 2, 1), | |
471 | }; | |
472 | ||
473 | #ifdef CONFIG_OF | |
474 | static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev, | |
475 | struct max77686_platform_data *pdata) | |
476 | { | |
477 | struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
478 | struct device_node *pmic_np, *regulators_np; | |
479 | struct max77686_regulator_data *rdata; | |
480 | struct of_regulator_match rmatch; | |
481 | unsigned int i; | |
482 | ||
483 | pmic_np = iodev->dev->of_node; | |
484 | regulators_np = of_get_child_by_name(pmic_np, "regulators"); | |
485 | if (!regulators_np) { | |
486 | dev_err(&pdev->dev, "could not find regulators sub-node\n"); | |
487 | return -EINVAL; | |
488 | } | |
489 | ||
490 | pdata->num_regulators = ARRAY_SIZE(regulators); | |
491 | rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) * | |
492 | pdata->num_regulators, GFP_KERNEL); | |
493 | if (!rdata) { | |
494 | of_node_put(regulators_np); | |
495 | return -ENOMEM; | |
496 | } | |
497 | ||
498 | for (i = 0; i < pdata->num_regulators; i++) { | |
499 | rmatch.name = regulators[i].name; | |
500 | rmatch.init_data = NULL; | |
501 | rmatch.of_node = NULL; | |
502 | if (of_regulator_match(&pdev->dev, regulators_np, &rmatch, | |
503 | 1) != 1) { | |
504 | dev_warn(&pdev->dev, "No matching regulator for '%s'\n", | |
505 | rmatch.name); | |
506 | continue; | |
507 | } | |
508 | rdata[i].initdata = rmatch.init_data; | |
509 | rdata[i].of_node = rmatch.of_node; | |
510 | rdata[i].id = regulators[i].id; | |
511 | } | |
512 | ||
513 | pdata->regulators = rdata; | |
514 | of_node_put(regulators_np); | |
515 | ||
516 | return 0; | |
517 | } | |
518 | #else | |
519 | static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev, | |
520 | struct max77686_platform_data *pdata) | |
521 | { | |
522 | return 0; | |
523 | } | |
524 | #endif /* CONFIG_OF */ | |
525 | ||
526 | static int max77802_pmic_probe(struct platform_device *pdev) | |
527 | { | |
528 | struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
529 | struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev); | |
530 | struct max77802_regulator_prv *max77802; | |
531 | int i, ret = 0, val; | |
532 | struct regulator_config config = { }; | |
533 | ||
534 | /* This is allocated by the MFD driver */ | |
535 | if (!pdata) { | |
536 | dev_err(&pdev->dev, "no platform data found for regulator\n"); | |
537 | return -ENODEV; | |
538 | } | |
539 | ||
540 | max77802 = devm_kzalloc(&pdev->dev, | |
541 | sizeof(struct max77802_regulator_prv), | |
542 | GFP_KERNEL); | |
543 | if (!max77802) | |
544 | return -ENOMEM; | |
545 | ||
546 | if (iodev->dev->of_node) { | |
547 | ret = max77802_pmic_dt_parse_pdata(pdev, pdata); | |
548 | if (ret) | |
549 | return ret; | |
550 | } | |
551 | ||
552 | config.dev = iodev->dev; | |
553 | config.regmap = iodev->regmap; | |
554 | config.driver_data = max77802; | |
555 | platform_set_drvdata(pdev, max77802); | |
556 | ||
557 | for (i = 0; i < MAX77802_REG_MAX; i++) { | |
558 | struct regulator_dev *rdev; | |
559 | int id = pdata->regulators[i].id; | |
560 | int shift = max77802_get_opmode_shift(id); | |
561 | ||
562 | config.init_data = pdata->regulators[i].initdata; | |
563 | config.of_node = pdata->regulators[i].of_node; | |
564 | ||
565 | ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val); | |
aea8dfb9 JMC |
566 | val = val >> shift & MAX77802_OPMODE_MASK; |
567 | ||
568 | /* | |
569 | * If the regulator is disabled and the system warm rebooted, | |
570 | * the hardware reports OFF as the regulator operating mode. | |
571 | * Default to operating mode NORMAL in that case. | |
572 | */ | |
573 | if (val == MAX77802_OPMODE_OFF) | |
574 | max77802->opmode[id] = MAX77802_OPMODE_NORMAL; | |
575 | else | |
576 | max77802->opmode[id] = val; | |
e6f2f805 JMC |
577 | |
578 | rdev = devm_regulator_register(&pdev->dev, | |
579 | ®ulators[i], &config); | |
580 | if (IS_ERR(rdev)) { | |
581 | dev_err(&pdev->dev, | |
582 | "regulator init failed for %d\n", i); | |
583 | return PTR_ERR(rdev); | |
584 | } | |
585 | } | |
586 | ||
587 | return 0; | |
588 | } | |
589 | ||
590 | static const struct platform_device_id max77802_pmic_id[] = { | |
591 | {"max77802-pmic", 0}, | |
592 | { }, | |
593 | }; | |
594 | MODULE_DEVICE_TABLE(platform, max77802_pmic_id); | |
595 | ||
596 | static struct platform_driver max77802_pmic_driver = { | |
597 | .driver = { | |
598 | .name = "max77802-pmic", | |
599 | .owner = THIS_MODULE, | |
600 | }, | |
601 | .probe = max77802_pmic_probe, | |
602 | .id_table = max77802_pmic_id, | |
603 | }; | |
604 | ||
605 | module_platform_driver(max77802_pmic_driver); | |
606 | ||
607 | MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver"); | |
608 | MODULE_AUTHOR("Simon Glass <sjg@chromium.org>"); | |
609 | MODULE_LICENSE("GPL"); |