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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> | |
5356e0da | 36 | #include <dt-bindings/regulator/maxim,max77802.h> |
e6f2f805 JMC |
37 | |
38 | /* Default ramp delay in case it is not manually set */ | |
39 | #define MAX77802_RAMP_DELAY 100000 /* uV/us */ | |
40 | ||
41 | #define MAX77802_OPMODE_SHIFT_LDO 6 | |
42 | #define MAX77802_OPMODE_BUCK234_SHIFT 4 | |
43 | #define MAX77802_OPMODE_MASK 0x3 | |
44 | ||
45 | #define MAX77802_VSEL_MASK 0x3F | |
46 | #define MAX77802_DVS_VSEL_MASK 0xFF | |
47 | ||
48 | #define MAX77802_RAMP_RATE_MASK_2BIT 0xC0 | |
49 | #define MAX77802_RAMP_RATE_SHIFT_2BIT 6 | |
50 | #define MAX77802_RAMP_RATE_MASK_4BIT 0xF0 | |
51 | #define MAX77802_RAMP_RATE_SHIFT_4BIT 4 | |
52 | ||
0505be71 | 53 | #define MAX77802_STATUS_OFF 0x0 |
e6fb2aac | 54 | #define MAX77802_OFF_PWRREQ 0x1 |
2e0eaa1a | 55 | #define MAX77802_LP_PWRREQ 0x2 |
e6fb2aac | 56 | |
e6f2f805 JMC |
57 | /* MAX77802 has two register formats: 2-bit and 4-bit */ |
58 | static const unsigned int ramp_table_77802_2bit[] = { | |
59 | 12500, | |
60 | 25000, | |
61 | 50000, | |
62 | 100000, | |
63 | }; | |
64 | ||
65 | static unsigned int ramp_table_77802_4bit[] = { | |
66 | 1000, 2000, 3030, 4000, | |
67 | 5000, 5880, 7140, 8330, | |
68 | 9090, 10000, 11110, 12500, | |
69 | 16670, 25000, 50000, 100000, | |
70 | }; | |
71 | ||
72 | struct max77802_regulator_prv { | |
e6f2f805 JMC |
73 | unsigned int opmode[MAX77802_REG_MAX]; |
74 | }; | |
75 | ||
4d7078e6 | 76 | static inline unsigned int max77802_map_mode(unsigned int mode) |
efbe5199 JMC |
77 | { |
78 | return mode == MAX77802_OPMODE_NORMAL ? | |
79 | REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY; | |
80 | } | |
81 | ||
e6f2f805 JMC |
82 | static int max77802_get_opmode_shift(int id) |
83 | { | |
84 | if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 && | |
85 | id <= MAX77802_BUCK10)) | |
86 | return 0; | |
87 | ||
88 | if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4) | |
89 | return MAX77802_OPMODE_BUCK234_SHIFT; | |
90 | ||
91 | if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35) | |
92 | return MAX77802_OPMODE_SHIFT_LDO; | |
93 | ||
94 | return -EINVAL; | |
95 | } | |
96 | ||
e6fb2aac JMC |
97 | /** |
98 | * max77802_set_suspend_disable - Disable the regulator during system suspend | |
99 | * @rdev: regulator to mark as disabled | |
e6f2f805 | 100 | * |
e6fb2aac JMC |
101 | * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ. |
102 | * Configure the regulator so the PMIC will turn it OFF during system suspend. | |
e6f2f805 | 103 | */ |
e6fb2aac | 104 | static int max77802_set_suspend_disable(struct regulator_dev *rdev) |
e6f2f805 | 105 | { |
e6fb2aac | 106 | unsigned int val = MAX77802_OFF_PWRREQ; |
e6f2f805 JMC |
107 | struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); |
108 | int id = rdev_get_id(rdev); | |
109 | int shift = max77802_get_opmode_shift(id); | |
110 | ||
111 | max77802->opmode[id] = val; | |
112 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
113 | rdev->desc->enable_mask, val << shift); | |
114 | } | |
115 | ||
efbe5199 JMC |
116 | /* |
117 | * Some LDOs support Low Power Mode while the system is running. | |
118 | * | |
119 | * LDOs 1, 3, 20, 21. | |
120 | */ | |
121 | static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode) | |
122 | { | |
123 | struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); | |
124 | int id = rdev_get_id(rdev); | |
125 | unsigned int val; | |
126 | int shift = max77802_get_opmode_shift(id); | |
127 | ||
128 | switch (mode) { | |
129 | case REGULATOR_MODE_STANDBY: | |
130 | val = MAX77802_OPMODE_LP; /* ON in Low Power Mode */ | |
131 | break; | |
132 | case REGULATOR_MODE_NORMAL: | |
133 | val = MAX77802_OPMODE_NORMAL; /* ON in Normal Mode */ | |
134 | break; | |
135 | default: | |
136 | dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", | |
137 | rdev->desc->name, mode); | |
138 | return -EINVAL; | |
139 | } | |
140 | ||
141 | max77802->opmode[id] = val; | |
142 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
143 | rdev->desc->enable_mask, val << shift); | |
144 | } | |
145 | ||
146 | static unsigned max77802_get_mode(struct regulator_dev *rdev) | |
147 | { | |
148 | struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); | |
149 | int id = rdev_get_id(rdev); | |
150 | ||
151 | return max77802_map_mode(max77802->opmode[id]); | |
152 | } | |
153 | ||
2e0eaa1a JMC |
154 | /** |
155 | * max77802_set_suspend_mode - set regulator opmode when the system is suspended | |
156 | * @rdev: regulator to change mode | |
157 | * @mode: operating mode to be set | |
e6f2f805 | 158 | * |
2e0eaa1a JMC |
159 | * Will set the operating mode for the regulators during system suspend. |
160 | * This function is valid for the three different enable control logics: | |
e6f2f805 | 161 | * |
2e0eaa1a JMC |
162 | * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35) |
163 | * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21) | |
164 | * Enable Control Logic3 by PWRREQ (LDO 3) | |
165 | * | |
166 | * If setting the regulator mode fails, the function only warns but does | |
167 | * not return an error code to avoid the regulator core to stop setting | |
168 | * the operating mode for the remaining regulators. | |
e6f2f805 | 169 | */ |
2e0eaa1a JMC |
170 | static int max77802_set_suspend_mode(struct regulator_dev *rdev, |
171 | unsigned int mode) | |
e6f2f805 JMC |
172 | { |
173 | struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); | |
174 | int id = rdev_get_id(rdev); | |
175 | unsigned int val; | |
176 | int shift = max77802_get_opmode_shift(id); | |
177 | ||
2e0eaa1a JMC |
178 | /* |
179 | * If the regulator has been disabled for suspend | |
180 | * then is invalid to try setting a suspend mode. | |
181 | */ | |
bf275375 | 182 | if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) { |
2e0eaa1a | 183 | dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n", |
e6f2f805 | 184 | rdev->desc->name, mode); |
2e0eaa1a | 185 | return 0; |
e6f2f805 JMC |
186 | } |
187 | ||
e6f2f805 | 188 | switch (mode) { |
2e0eaa1a JMC |
189 | case REGULATOR_MODE_STANDBY: |
190 | /* | |
191 | * If the regulator opmode is normal then enable | |
192 | * ON in Low Power Mode by PWRREQ. If the mode is | |
193 | * already Low Power then no action is required. | |
194 | */ | |
195 | if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL) | |
196 | val = MAX77802_LP_PWRREQ; | |
197 | else | |
198 | return 0; | |
e6f2f805 | 199 | break; |
2e0eaa1a JMC |
200 | case REGULATOR_MODE_NORMAL: |
201 | /* | |
202 | * If the regulator operating mode is Low Power then | |
203 | * normal is not a valid opmode in suspend. If the | |
204 | * mode is already normal then no action is required. | |
205 | */ | |
206 | if (max77802->opmode[id] == MAX77802_OPMODE_LP) | |
207 | dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n", | |
208 | rdev->desc->name, mode); | |
209 | return 0; | |
e6f2f805 JMC |
210 | default: |
211 | dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", | |
212 | rdev->desc->name, mode); | |
213 | return -EINVAL; | |
214 | } | |
215 | ||
e6f2f805 JMC |
216 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, |
217 | rdev->desc->enable_mask, val << shift); | |
218 | } | |
219 | ||
220 | static int max77802_enable(struct regulator_dev *rdev) | |
221 | { | |
222 | struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); | |
223 | int id = rdev_get_id(rdev); | |
224 | int shift = max77802_get_opmode_shift(id); | |
225 | ||
e6fb2aac JMC |
226 | if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) |
227 | max77802->opmode[id] = MAX77802_OPMODE_NORMAL; | |
228 | ||
e6f2f805 JMC |
229 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, |
230 | rdev->desc->enable_mask, | |
231 | max77802->opmode[id] << shift); | |
232 | } | |
233 | ||
234 | static int max77802_find_ramp_value(struct regulator_dev *rdev, | |
235 | const unsigned int limits[], int size, | |
236 | unsigned int ramp_delay) | |
237 | { | |
238 | int i; | |
239 | ||
240 | for (i = 0; i < size; i++) { | |
241 | if (ramp_delay <= limits[i]) | |
242 | return i; | |
243 | } | |
244 | ||
245 | /* Use maximum value for no ramp control */ | |
246 | dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n", | |
247 | rdev->desc->name, ramp_delay); | |
248 | return size - 1; | |
249 | } | |
250 | ||
251 | /* Used for BUCKs 2-4 */ | |
252 | static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev, | |
253 | int ramp_delay) | |
254 | { | |
255 | int id = rdev_get_id(rdev); | |
256 | unsigned int ramp_value; | |
257 | ||
258 | if (id > MAX77802_BUCK4) { | |
259 | dev_warn(&rdev->dev, | |
260 | "%s: regulator: ramp delay not supported\n", | |
261 | rdev->desc->name); | |
262 | return -EINVAL; | |
263 | } | |
264 | ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit, | |
265 | ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay); | |
266 | ||
267 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
268 | MAX77802_RAMP_RATE_MASK_2BIT, | |
269 | ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT); | |
270 | } | |
271 | ||
272 | /* For BUCK1, 6 */ | |
273 | static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev, | |
274 | int ramp_delay) | |
275 | { | |
276 | unsigned int ramp_value; | |
277 | ||
278 | ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit, | |
279 | ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay); | |
280 | ||
281 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
282 | MAX77802_RAMP_RATE_MASK_4BIT, | |
283 | ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT); | |
284 | } | |
285 | ||
286 | /* | |
287 | * LDOs 2, 4-19, 22-35 | |
288 | */ | |
289 | static struct regulator_ops max77802_ldo_ops_logic1 = { | |
290 | .list_voltage = regulator_list_voltage_linear, | |
291 | .map_voltage = regulator_map_voltage_linear, | |
292 | .is_enabled = regulator_is_enabled_regmap, | |
293 | .enable = max77802_enable, | |
294 | .disable = regulator_disable_regmap, | |
295 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
296 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
297 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
e6fb2aac | 298 | .set_suspend_disable = max77802_set_suspend_disable, |
2e0eaa1a | 299 | .set_suspend_mode = max77802_set_suspend_mode, |
e6f2f805 JMC |
300 | }; |
301 | ||
302 | /* | |
303 | * LDOs 1, 20, 21, 3 | |
304 | */ | |
305 | static struct regulator_ops max77802_ldo_ops_logic2 = { | |
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, | |
efbe5199 JMC |
314 | .set_mode = max77802_set_mode, |
315 | .get_mode = max77802_get_mode, | |
2e0eaa1a | 316 | .set_suspend_mode = max77802_set_suspend_mode, |
e6f2f805 JMC |
317 | }; |
318 | ||
319 | /* BUCKS 1, 6 */ | |
320 | static struct regulator_ops max77802_buck_16_dvs_ops = { | |
321 | .list_voltage = regulator_list_voltage_linear, | |
322 | .map_voltage = regulator_map_voltage_linear, | |
323 | .is_enabled = regulator_is_enabled_regmap, | |
324 | .enable = max77802_enable, | |
325 | .disable = regulator_disable_regmap, | |
326 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
327 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
328 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
329 | .set_ramp_delay = max77802_set_ramp_delay_4bit, | |
e6fb2aac | 330 | .set_suspend_disable = max77802_set_suspend_disable, |
e6f2f805 JMC |
331 | }; |
332 | ||
b0615f1d JMC |
333 | /* BUCKs 2-4 */ |
334 | static struct regulator_ops max77802_buck_234_ops = { | |
335 | .list_voltage = regulator_list_voltage_linear, | |
336 | .map_voltage = regulator_map_voltage_linear, | |
337 | .is_enabled = regulator_is_enabled_regmap, | |
338 | .enable = max77802_enable, | |
339 | .disable = regulator_disable_regmap, | |
340 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
341 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
342 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
343 | .set_ramp_delay = max77802_set_ramp_delay_2bit, | |
b0615f1d | 344 | .set_suspend_disable = max77802_set_suspend_disable, |
2e0eaa1a | 345 | .set_suspend_mode = max77802_set_suspend_mode, |
b0615f1d JMC |
346 | }; |
347 | ||
348 | /* BUCKs 5, 7-10 */ | |
e6f2f805 JMC |
349 | static struct regulator_ops max77802_buck_dvs_ops = { |
350 | .list_voltage = regulator_list_voltage_linear, | |
351 | .map_voltage = regulator_map_voltage_linear, | |
352 | .is_enabled = regulator_is_enabled_regmap, | |
353 | .enable = max77802_enable, | |
354 | .disable = regulator_disable_regmap, | |
355 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
356 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
357 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
358 | .set_ramp_delay = max77802_set_ramp_delay_2bit, | |
e6fb2aac | 359 | .set_suspend_disable = max77802_set_suspend_disable, |
e6f2f805 JMC |
360 | }; |
361 | ||
362 | /* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */ | |
363 | #define regulator_77802_desc_p_ldo(num, supply, log) { \ | |
364 | .name = "LDO"#num, \ | |
365 | .id = MAX77802_LDO##num, \ | |
366 | .supply_name = "inl"#supply, \ | |
367 | .ops = &max77802_ldo_ops_logic##log, \ | |
368 | .type = REGULATOR_VOLTAGE, \ | |
369 | .owner = THIS_MODULE, \ | |
370 | .min_uV = 800000, \ | |
371 | .uV_step = 50000, \ | |
372 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
373 | .n_voltages = 1 << 6, \ | |
374 | .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ | |
375 | .vsel_mask = MAX77802_VSEL_MASK, \ | |
376 | .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ | |
377 | .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ | |
378 | } | |
379 | ||
380 | /* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */ | |
381 | #define regulator_77802_desc_n_ldo(num, supply, log) { \ | |
382 | .name = "LDO"#num, \ | |
383 | .id = MAX77802_LDO##num, \ | |
384 | .supply_name = "inl"#supply, \ | |
385 | .ops = &max77802_ldo_ops_logic##log, \ | |
386 | .type = REGULATOR_VOLTAGE, \ | |
387 | .owner = THIS_MODULE, \ | |
388 | .min_uV = 800000, \ | |
389 | .uV_step = 25000, \ | |
390 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
391 | .n_voltages = 1 << 6, \ | |
392 | .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ | |
393 | .vsel_mask = MAX77802_VSEL_MASK, \ | |
394 | .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ | |
395 | .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ | |
396 | } | |
397 | ||
398 | /* BUCKs 1, 6 */ | |
399 | #define regulator_77802_desc_16_buck(num) { \ | |
400 | .name = "BUCK"#num, \ | |
401 | .id = MAX77802_BUCK##num, \ | |
402 | .supply_name = "inb"#num, \ | |
403 | .ops = &max77802_buck_16_dvs_ops, \ | |
404 | .type = REGULATOR_VOLTAGE, \ | |
405 | .owner = THIS_MODULE, \ | |
406 | .min_uV = 612500, \ | |
407 | .uV_step = 6250, \ | |
408 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
409 | .n_voltages = 1 << 8, \ | |
410 | .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ | |
411 | .vsel_mask = MAX77802_DVS_VSEL_MASK, \ | |
412 | .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \ | |
413 | .enable_mask = MAX77802_OPMODE_MASK, \ | |
414 | } | |
415 | ||
416 | /* BUCKS 2-4 */ | |
417 | #define regulator_77802_desc_234_buck(num) { \ | |
418 | .name = "BUCK"#num, \ | |
419 | .id = MAX77802_BUCK##num, \ | |
420 | .supply_name = "inb"#num, \ | |
b0615f1d | 421 | .ops = &max77802_buck_234_ops, \ |
e6f2f805 JMC |
422 | .type = REGULATOR_VOLTAGE, \ |
423 | .owner = THIS_MODULE, \ | |
424 | .min_uV = 600000, \ | |
425 | .uV_step = 6250, \ | |
426 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
427 | .n_voltages = 0x91, \ | |
428 | .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ | |
429 | .vsel_mask = MAX77802_DVS_VSEL_MASK, \ | |
430 | .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \ | |
431 | .enable_mask = MAX77802_OPMODE_MASK << \ | |
432 | MAX77802_OPMODE_BUCK234_SHIFT, \ | |
433 | } | |
434 | ||
435 | /* BUCK 5 */ | |
436 | #define regulator_77802_desc_buck5(num) { \ | |
437 | .name = "BUCK"#num, \ | |
438 | .id = MAX77802_BUCK##num, \ | |
439 | .supply_name = "inb"#num, \ | |
440 | .ops = &max77802_buck_dvs_ops, \ | |
441 | .type = REGULATOR_VOLTAGE, \ | |
442 | .owner = THIS_MODULE, \ | |
443 | .min_uV = 750000, \ | |
444 | .uV_step = 50000, \ | |
445 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
446 | .n_voltages = 1 << 6, \ | |
447 | .vsel_reg = MAX77802_REG_BUCK5OUT, \ | |
448 | .vsel_mask = MAX77802_VSEL_MASK, \ | |
449 | .enable_reg = MAX77802_REG_BUCK5CTRL, \ | |
450 | .enable_mask = MAX77802_OPMODE_MASK, \ | |
451 | } | |
452 | ||
453 | /* BUCKs 7-10 */ | |
454 | #define regulator_77802_desc_buck7_10(num) { \ | |
455 | .name = "BUCK"#num, \ | |
456 | .id = MAX77802_BUCK##num, \ | |
457 | .supply_name = "inb"#num, \ | |
458 | .ops = &max77802_buck_dvs_ops, \ | |
459 | .type = REGULATOR_VOLTAGE, \ | |
460 | .owner = THIS_MODULE, \ | |
461 | .min_uV = 750000, \ | |
462 | .uV_step = 50000, \ | |
463 | .ramp_delay = MAX77802_RAMP_DELAY, \ | |
464 | .n_voltages = 1 << 6, \ | |
465 | .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \ | |
466 | .vsel_mask = MAX77802_VSEL_MASK, \ | |
467 | .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \ | |
468 | .enable_mask = MAX77802_OPMODE_MASK, \ | |
469 | } | |
470 | ||
6c4159a5 | 471 | static const struct regulator_desc regulators[] = { |
e6f2f805 JMC |
472 | regulator_77802_desc_16_buck(1), |
473 | regulator_77802_desc_234_buck(2), | |
474 | regulator_77802_desc_234_buck(3), | |
475 | regulator_77802_desc_234_buck(4), | |
476 | regulator_77802_desc_buck5(5), | |
477 | regulator_77802_desc_16_buck(6), | |
478 | regulator_77802_desc_buck7_10(7), | |
479 | regulator_77802_desc_buck7_10(8), | |
480 | regulator_77802_desc_buck7_10(9), | |
481 | regulator_77802_desc_buck7_10(10), | |
482 | regulator_77802_desc_n_ldo(1, 10, 2), | |
483 | regulator_77802_desc_n_ldo(2, 10, 1), | |
484 | regulator_77802_desc_p_ldo(3, 3, 2), | |
485 | regulator_77802_desc_p_ldo(4, 6, 1), | |
486 | regulator_77802_desc_p_ldo(5, 3, 1), | |
487 | regulator_77802_desc_p_ldo(6, 3, 1), | |
488 | regulator_77802_desc_p_ldo(7, 3, 1), | |
489 | regulator_77802_desc_n_ldo(8, 1, 1), | |
490 | regulator_77802_desc_p_ldo(9, 5, 1), | |
491 | regulator_77802_desc_p_ldo(10, 4, 1), | |
492 | regulator_77802_desc_p_ldo(11, 4, 1), | |
493 | regulator_77802_desc_p_ldo(12, 9, 1), | |
494 | regulator_77802_desc_p_ldo(13, 4, 1), | |
495 | regulator_77802_desc_p_ldo(14, 4, 1), | |
496 | regulator_77802_desc_n_ldo(15, 1, 1), | |
497 | regulator_77802_desc_n_ldo(17, 2, 1), | |
498 | regulator_77802_desc_p_ldo(18, 7, 1), | |
499 | regulator_77802_desc_p_ldo(19, 5, 1), | |
500 | regulator_77802_desc_p_ldo(20, 7, 2), | |
501 | regulator_77802_desc_p_ldo(21, 6, 2), | |
502 | regulator_77802_desc_p_ldo(23, 9, 1), | |
503 | regulator_77802_desc_p_ldo(24, 6, 1), | |
504 | regulator_77802_desc_p_ldo(25, 9, 1), | |
505 | regulator_77802_desc_p_ldo(26, 9, 1), | |
506 | regulator_77802_desc_n_ldo(27, 2, 1), | |
507 | regulator_77802_desc_p_ldo(28, 7, 1), | |
508 | regulator_77802_desc_p_ldo(29, 7, 1), | |
509 | regulator_77802_desc_n_ldo(30, 2, 1), | |
510 | regulator_77802_desc_p_ldo(32, 9, 1), | |
511 | regulator_77802_desc_p_ldo(33, 6, 1), | |
512 | regulator_77802_desc_p_ldo(34, 9, 1), | |
513 | regulator_77802_desc_n_ldo(35, 2, 1), | |
514 | }; | |
515 | ||
516 | #ifdef CONFIG_OF | |
517 | static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev, | |
518 | struct max77686_platform_data *pdata) | |
519 | { | |
520 | struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
521 | struct device_node *pmic_np, *regulators_np; | |
522 | struct max77686_regulator_data *rdata; | |
523 | struct of_regulator_match rmatch; | |
524 | unsigned int i; | |
525 | ||
526 | pmic_np = iodev->dev->of_node; | |
527 | regulators_np = of_get_child_by_name(pmic_np, "regulators"); | |
528 | if (!regulators_np) { | |
529 | dev_err(&pdev->dev, "could not find regulators sub-node\n"); | |
530 | return -EINVAL; | |
531 | } | |
532 | ||
533 | pdata->num_regulators = ARRAY_SIZE(regulators); | |
534 | rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) * | |
535 | pdata->num_regulators, GFP_KERNEL); | |
536 | if (!rdata) { | |
537 | of_node_put(regulators_np); | |
538 | return -ENOMEM; | |
539 | } | |
540 | ||
541 | for (i = 0; i < pdata->num_regulators; i++) { | |
542 | rmatch.name = regulators[i].name; | |
543 | rmatch.init_data = NULL; | |
544 | rmatch.of_node = NULL; | |
545 | if (of_regulator_match(&pdev->dev, regulators_np, &rmatch, | |
546 | 1) != 1) { | |
547 | dev_warn(&pdev->dev, "No matching regulator for '%s'\n", | |
548 | rmatch.name); | |
549 | continue; | |
550 | } | |
551 | rdata[i].initdata = rmatch.init_data; | |
552 | rdata[i].of_node = rmatch.of_node; | |
553 | rdata[i].id = regulators[i].id; | |
554 | } | |
555 | ||
556 | pdata->regulators = rdata; | |
557 | of_node_put(regulators_np); | |
558 | ||
559 | return 0; | |
560 | } | |
561 | #else | |
562 | static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev, | |
563 | struct max77686_platform_data *pdata) | |
564 | { | |
565 | return 0; | |
566 | } | |
567 | #endif /* CONFIG_OF */ | |
568 | ||
569 | static int max77802_pmic_probe(struct platform_device *pdev) | |
570 | { | |
571 | struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
572 | struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev); | |
573 | struct max77802_regulator_prv *max77802; | |
574 | int i, ret = 0, val; | |
575 | struct regulator_config config = { }; | |
576 | ||
577 | /* This is allocated by the MFD driver */ | |
578 | if (!pdata) { | |
579 | dev_err(&pdev->dev, "no platform data found for regulator\n"); | |
580 | return -ENODEV; | |
581 | } | |
582 | ||
583 | max77802 = devm_kzalloc(&pdev->dev, | |
584 | sizeof(struct max77802_regulator_prv), | |
585 | GFP_KERNEL); | |
586 | if (!max77802) | |
587 | return -ENOMEM; | |
588 | ||
589 | if (iodev->dev->of_node) { | |
590 | ret = max77802_pmic_dt_parse_pdata(pdev, pdata); | |
591 | if (ret) | |
592 | return ret; | |
593 | } | |
594 | ||
595 | config.dev = iodev->dev; | |
596 | config.regmap = iodev->regmap; | |
597 | config.driver_data = max77802; | |
598 | platform_set_drvdata(pdev, max77802); | |
599 | ||
600 | for (i = 0; i < MAX77802_REG_MAX; i++) { | |
601 | struct regulator_dev *rdev; | |
602 | int id = pdata->regulators[i].id; | |
603 | int shift = max77802_get_opmode_shift(id); | |
604 | ||
605 | config.init_data = pdata->regulators[i].initdata; | |
606 | config.of_node = pdata->regulators[i].of_node; | |
607 | ||
608 | ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val); | |
aea8dfb9 JMC |
609 | val = val >> shift & MAX77802_OPMODE_MASK; |
610 | ||
611 | /* | |
612 | * If the regulator is disabled and the system warm rebooted, | |
613 | * the hardware reports OFF as the regulator operating mode. | |
614 | * Default to operating mode NORMAL in that case. | |
615 | */ | |
0505be71 | 616 | if (val == MAX77802_STATUS_OFF) |
aea8dfb9 JMC |
617 | max77802->opmode[id] = MAX77802_OPMODE_NORMAL; |
618 | else | |
619 | max77802->opmode[id] = val; | |
e6f2f805 JMC |
620 | |
621 | rdev = devm_regulator_register(&pdev->dev, | |
622 | ®ulators[i], &config); | |
623 | if (IS_ERR(rdev)) { | |
624 | dev_err(&pdev->dev, | |
625 | "regulator init failed for %d\n", i); | |
626 | return PTR_ERR(rdev); | |
627 | } | |
628 | } | |
629 | ||
630 | return 0; | |
631 | } | |
632 | ||
633 | static const struct platform_device_id max77802_pmic_id[] = { | |
634 | {"max77802-pmic", 0}, | |
635 | { }, | |
636 | }; | |
637 | MODULE_DEVICE_TABLE(platform, max77802_pmic_id); | |
638 | ||
639 | static struct platform_driver max77802_pmic_driver = { | |
640 | .driver = { | |
641 | .name = "max77802-pmic", | |
642 | .owner = THIS_MODULE, | |
643 | }, | |
644 | .probe = max77802_pmic_probe, | |
645 | .id_table = max77802_pmic_id, | |
646 | }; | |
647 | ||
648 | module_platform_driver(max77802_pmic_driver); | |
649 | ||
650 | MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver"); | |
651 | MODULE_AUTHOR("Simon Glass <sjg@chromium.org>"); | |
652 | MODULE_LICENSE("GPL"); |