1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright 2012 Texas Instruments |
4 | * |
5 | * Author: Milo(Woogyom) Kim <milo.kim@ti.com> |
6 | */ |
7 | |
8 | #include <linux/module.h> |
9 | #include <linux/slab.h> |
10 | #include <linux/i2c.h> |
11 | #include <linux/regmap.h> |
12 | #include <linux/err.h> |
13 | #include <linux/gpio/consumer.h> |
14 | #include <linux/delay.h> |
15 | #include <linux/regulator/lp872x.h> |
16 | #include <linux/regulator/driver.h> |
17 | #include <linux/platform_device.h> |
18 | #include <linux/of.h> |
19 | #include <linux/regulator/of_regulator.h> |
20 | |
21 | /* Registers : LP8720/8725 shared */ |
22 | #define LP872X_GENERAL_CFG 0x00 |
23 | #define LP872X_LDO1_VOUT 0x01 |
24 | #define LP872X_LDO2_VOUT 0x02 |
25 | #define LP872X_LDO3_VOUT 0x03 |
26 | #define LP872X_LDO4_VOUT 0x04 |
27 | #define LP872X_LDO5_VOUT 0x05 |
28 | |
29 | /* Registers : LP8720 */ |
30 | #define LP8720_BUCK_VOUT1 0x06 |
31 | #define LP8720_BUCK_VOUT2 0x07 |
32 | #define LP8720_ENABLE 0x08 |
33 | |
34 | /* Registers : LP8725 */ |
35 | #define LP8725_LILO1_VOUT 0x06 |
36 | #define LP8725_LILO2_VOUT 0x07 |
37 | #define LP8725_BUCK1_VOUT1 0x08 |
38 | #define LP8725_BUCK1_VOUT2 0x09 |
39 | #define LP8725_BUCK2_VOUT1 0x0A |
40 | #define LP8725_BUCK2_VOUT2 0x0B |
41 | #define LP8725_BUCK_CTRL 0x0C |
42 | #define LP8725_LDO_CTRL 0x0D |
43 | |
44 | /* Mask/shift : LP8720/LP8725 shared */ |
45 | #define LP872X_VOUT_M 0x1F |
46 | #define LP872X_START_DELAY_M 0xE0 |
47 | #define LP872X_START_DELAY_S 5 |
48 | #define LP872X_EN_LDO1_M BIT(0) |
49 | #define LP872X_EN_LDO2_M BIT(1) |
50 | #define LP872X_EN_LDO3_M BIT(2) |
51 | #define LP872X_EN_LDO4_M BIT(3) |
52 | #define LP872X_EN_LDO5_M BIT(4) |
53 | |
54 | /* Mask/shift : LP8720 */ |
55 | #define LP8720_TIMESTEP_S 0 /* Addr 00h */ |
56 | #define LP8720_TIMESTEP_M BIT(0) |
57 | #define LP8720_EXT_DVS_M BIT(2) |
58 | #define LP8720_BUCK_FPWM_S 5 /* Addr 07h */ |
59 | #define LP8720_BUCK_FPWM_M BIT(5) |
60 | #define LP8720_EN_BUCK_M BIT(5) /* Addr 08h */ |
61 | #define LP8720_DVS_SEL_M BIT(7) |
62 | |
63 | /* Mask/shift : LP8725 */ |
64 | #define LP8725_TIMESTEP_M 0xC0 /* Addr 00h */ |
65 | #define LP8725_TIMESTEP_S 6 |
66 | #define LP8725_BUCK1_EN_M BIT(0) |
67 | #define LP8725_DVS1_M BIT(2) |
68 | #define LP8725_DVS2_M BIT(3) |
69 | #define LP8725_BUCK2_EN_M BIT(4) |
70 | #define LP8725_BUCK_CL_M 0xC0 /* Addr 09h, 0Bh */ |
71 | #define LP8725_BUCK_CL_S 6 |
72 | #define LP8725_BUCK1_FPWM_S 1 /* Addr 0Ch */ |
73 | #define LP8725_BUCK1_FPWM_M BIT(1) |
74 | #define LP8725_BUCK2_FPWM_S 5 |
75 | #define LP8725_BUCK2_FPWM_M BIT(5) |
76 | #define LP8725_EN_LILO1_M BIT(5) /* Addr 0Dh */ |
77 | #define LP8725_EN_LILO2_M BIT(6) |
78 | |
79 | /* PWM mode */ |
80 | #define LP872X_FORCE_PWM 1 |
81 | #define LP872X_AUTO_PWM 0 |
82 | |
83 | #define LP8720_NUM_REGULATORS 6 |
84 | #define LP8725_NUM_REGULATORS 9 |
85 | #define EXTERN_DVS_USED 0 |
86 | #define MAX_DELAY 6 |
87 | |
88 | /* Default DVS Mode */ |
89 | #define LP8720_DEFAULT_DVS 0 |
90 | #define LP8725_DEFAULT_DVS BIT(2) |
91 | |
92 | /* dump registers in regmap-debugfs */ |
93 | #define MAX_REGISTERS 0x0F |
94 | |
95 | enum lp872x_id { |
96 | LP8720, |
97 | LP8725, |
98 | }; |
99 | |
100 | struct lp872x { |
101 | struct regmap *regmap; |
102 | struct device *dev; |
103 | enum lp872x_id chipid; |
104 | struct lp872x_platform_data *pdata; |
105 | int num_regulators; |
106 | enum gpiod_flags dvs_pin; |
107 | }; |
108 | |
109 | /* LP8720/LP8725 shared voltage table for LDOs */ |
110 | static const unsigned int lp872x_ldo_vtbl[] = { |
111 | 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000, |
112 | 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 2000000, |
113 | 2100000, 2200000, 2300000, 2400000, 2500000, 2600000, 2650000, 2700000, |
114 | 2750000, 2800000, 2850000, 2900000, 2950000, 3000000, 3100000, 3300000, |
115 | }; |
116 | |
117 | /* LP8720 LDO4 voltage table */ |
118 | static const unsigned int lp8720_ldo4_vtbl[] = { |
119 | 800000, 850000, 900000, 1000000, 1100000, 1200000, 1250000, 1300000, |
120 | 1350000, 1400000, 1450000, 1500000, 1550000, 1600000, 1650000, 1700000, |
121 | 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, |
122 | 2400000, 2500000, 2600000, 2650000, 2700000, 2750000, 2800000, 2850000, |
123 | }; |
124 | |
125 | /* LP8725 LILO(Low Input Low Output) voltage table */ |
126 | static const unsigned int lp8725_lilo_vtbl[] = { |
127 | 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, |
128 | 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, |
129 | 1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000, |
130 | 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000, |
131 | }; |
132 | |
133 | /* LP8720 BUCK voltage table */ |
134 | #define EXT_R 0 /* external resistor divider */ |
135 | static const unsigned int lp8720_buck_vtbl[] = { |
136 | EXT_R, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, |
137 | 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, |
138 | 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, |
139 | 1950000, 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, |
140 | }; |
141 | |
142 | /* LP8725 BUCK voltage table */ |
143 | static const unsigned int lp8725_buck_vtbl[] = { |
144 | 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, |
145 | 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, |
146 | 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, |
147 | 2400000, 2500000, 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, |
148 | }; |
149 | |
150 | /* LP8725 BUCK current limit */ |
151 | static const unsigned int lp8725_buck_uA[] = { |
152 | 460000, 780000, 1050000, 1370000, |
153 | }; |
154 | |
155 | static int lp872x_read_byte(struct lp872x *lp, u8 addr, u8 *data) |
156 | { |
157 | int ret; |
158 | unsigned int val; |
159 | |
160 | ret = regmap_read(map: lp->regmap, reg: addr, val: &val); |
161 | if (ret < 0) { |
162 | dev_err(lp->dev, "failed to read 0x%.2x\n" , addr); |
163 | return ret; |
164 | } |
165 | |
166 | *data = (u8)val; |
167 | return 0; |
168 | } |
169 | |
170 | static inline int lp872x_write_byte(struct lp872x *lp, u8 addr, u8 data) |
171 | { |
172 | return regmap_write(map: lp->regmap, reg: addr, val: data); |
173 | } |
174 | |
175 | static inline int lp872x_update_bits(struct lp872x *lp, u8 addr, |
176 | unsigned int mask, u8 data) |
177 | { |
178 | return regmap_update_bits(map: lp->regmap, reg: addr, mask, val: data); |
179 | } |
180 | |
181 | static int lp872x_get_timestep_usec(struct lp872x *lp) |
182 | { |
183 | enum lp872x_id chip = lp->chipid; |
184 | u8 val, mask, shift; |
185 | int *time_usec, size, ret; |
186 | int lp8720_time_usec[] = { 25, 50 }; |
187 | int lp8725_time_usec[] = { 32, 64, 128, 256 }; |
188 | |
189 | switch (chip) { |
190 | case LP8720: |
191 | mask = LP8720_TIMESTEP_M; |
192 | shift = LP8720_TIMESTEP_S; |
193 | time_usec = &lp8720_time_usec[0]; |
194 | size = ARRAY_SIZE(lp8720_time_usec); |
195 | break; |
196 | case LP8725: |
197 | mask = LP8725_TIMESTEP_M; |
198 | shift = LP8725_TIMESTEP_S; |
199 | time_usec = &lp8725_time_usec[0]; |
200 | size = ARRAY_SIZE(lp8725_time_usec); |
201 | break; |
202 | default: |
203 | return -EINVAL; |
204 | } |
205 | |
206 | ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, data: &val); |
207 | if (ret) |
208 | return ret; |
209 | |
210 | val = (val & mask) >> shift; |
211 | if (val >= size) |
212 | return -EINVAL; |
213 | |
214 | return *(time_usec + val); |
215 | } |
216 | |
217 | static int lp872x_regulator_enable_time(struct regulator_dev *rdev) |
218 | { |
219 | struct lp872x *lp = rdev_get_drvdata(rdev); |
220 | enum lp872x_regulator_id rid = rdev_get_id(rdev); |
221 | int time_step_us = lp872x_get_timestep_usec(lp); |
222 | int ret; |
223 | u8 addr, val; |
224 | |
225 | if (time_step_us < 0) |
226 | return time_step_us; |
227 | |
228 | switch (rid) { |
229 | case LP8720_ID_LDO1 ... LP8720_ID_BUCK: |
230 | addr = LP872X_LDO1_VOUT + rid; |
231 | break; |
232 | case LP8725_ID_LDO1 ... LP8725_ID_BUCK1: |
233 | addr = LP872X_LDO1_VOUT + rid - LP8725_ID_BASE; |
234 | break; |
235 | case LP8725_ID_BUCK2: |
236 | addr = LP8725_BUCK2_VOUT1; |
237 | break; |
238 | default: |
239 | return -EINVAL; |
240 | } |
241 | |
242 | ret = lp872x_read_byte(lp, addr, data: &val); |
243 | if (ret) |
244 | return ret; |
245 | |
246 | val = (val & LP872X_START_DELAY_M) >> LP872X_START_DELAY_S; |
247 | |
248 | return val > MAX_DELAY ? 0 : val * time_step_us; |
249 | } |
250 | |
251 | static void lp872x_set_dvs(struct lp872x *lp, enum lp872x_dvs_sel dvs_sel, |
252 | struct gpio_desc *gpio) |
253 | { |
254 | enum gpiod_flags state; |
255 | |
256 | state = dvs_sel == SEL_V1 ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; |
257 | gpiod_set_value(desc: gpio, value: state); |
258 | lp->dvs_pin = state; |
259 | } |
260 | |
261 | static u8 lp872x_select_buck_vout_addr(struct lp872x *lp, |
262 | enum lp872x_regulator_id buck) |
263 | { |
264 | u8 val, addr; |
265 | |
266 | if (lp872x_read_byte(lp, LP872X_GENERAL_CFG, data: &val)) |
267 | return 0; |
268 | |
269 | switch (buck) { |
270 | case LP8720_ID_BUCK: |
271 | if (val & LP8720_EXT_DVS_M) { |
272 | addr = (lp->dvs_pin == GPIOD_OUT_HIGH) ? |
273 | LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; |
274 | } else { |
275 | if (lp872x_read_byte(lp, LP8720_ENABLE, data: &val)) |
276 | return 0; |
277 | |
278 | addr = val & LP8720_DVS_SEL_M ? |
279 | LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; |
280 | } |
281 | break; |
282 | case LP8725_ID_BUCK1: |
283 | if (val & LP8725_DVS1_M) |
284 | addr = LP8725_BUCK1_VOUT1; |
285 | else |
286 | addr = (lp->dvs_pin == GPIOD_OUT_HIGH) ? |
287 | LP8725_BUCK1_VOUT1 : LP8725_BUCK1_VOUT2; |
288 | break; |
289 | case LP8725_ID_BUCK2: |
290 | addr = val & LP8725_DVS2_M ? |
291 | LP8725_BUCK2_VOUT1 : LP8725_BUCK2_VOUT2; |
292 | break; |
293 | default: |
294 | return 0; |
295 | } |
296 | |
297 | return addr; |
298 | } |
299 | |
300 | static bool lp872x_is_valid_buck_addr(u8 addr) |
301 | { |
302 | switch (addr) { |
303 | case LP8720_BUCK_VOUT1: |
304 | case LP8720_BUCK_VOUT2: |
305 | case LP8725_BUCK1_VOUT1: |
306 | case LP8725_BUCK1_VOUT2: |
307 | case LP8725_BUCK2_VOUT1: |
308 | case LP8725_BUCK2_VOUT2: |
309 | return true; |
310 | default: |
311 | return false; |
312 | } |
313 | } |
314 | |
315 | static int lp872x_buck_set_voltage_sel(struct regulator_dev *rdev, |
316 | unsigned selector) |
317 | { |
318 | struct lp872x *lp = rdev_get_drvdata(rdev); |
319 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
320 | u8 addr, mask = LP872X_VOUT_M; |
321 | struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; |
322 | |
323 | if (dvs && dvs->gpio) |
324 | lp872x_set_dvs(lp, dvs_sel: dvs->vsel, gpio: dvs->gpio); |
325 | |
326 | addr = lp872x_select_buck_vout_addr(lp, buck); |
327 | if (!lp872x_is_valid_buck_addr(addr)) |
328 | return -EINVAL; |
329 | |
330 | return lp872x_update_bits(lp, addr, mask, data: selector); |
331 | } |
332 | |
333 | static int lp872x_buck_get_voltage_sel(struct regulator_dev *rdev) |
334 | { |
335 | struct lp872x *lp = rdev_get_drvdata(rdev); |
336 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
337 | u8 addr, val; |
338 | int ret; |
339 | |
340 | addr = lp872x_select_buck_vout_addr(lp, buck); |
341 | if (!lp872x_is_valid_buck_addr(addr)) |
342 | return -EINVAL; |
343 | |
344 | ret = lp872x_read_byte(lp, addr, data: &val); |
345 | if (ret) |
346 | return ret; |
347 | |
348 | return val & LP872X_VOUT_M; |
349 | } |
350 | |
351 | static int lp872x_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) |
352 | { |
353 | struct lp872x *lp = rdev_get_drvdata(rdev); |
354 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
355 | u8 addr, mask, shift, val; |
356 | |
357 | switch (buck) { |
358 | case LP8720_ID_BUCK: |
359 | addr = LP8720_BUCK_VOUT2; |
360 | mask = LP8720_BUCK_FPWM_M; |
361 | shift = LP8720_BUCK_FPWM_S; |
362 | break; |
363 | case LP8725_ID_BUCK1: |
364 | addr = LP8725_BUCK_CTRL; |
365 | mask = LP8725_BUCK1_FPWM_M; |
366 | shift = LP8725_BUCK1_FPWM_S; |
367 | break; |
368 | case LP8725_ID_BUCK2: |
369 | addr = LP8725_BUCK_CTRL; |
370 | mask = LP8725_BUCK2_FPWM_M; |
371 | shift = LP8725_BUCK2_FPWM_S; |
372 | break; |
373 | default: |
374 | return -EINVAL; |
375 | } |
376 | |
377 | if (mode == REGULATOR_MODE_FAST) |
378 | val = LP872X_FORCE_PWM << shift; |
379 | else if (mode == REGULATOR_MODE_NORMAL) |
380 | val = LP872X_AUTO_PWM << shift; |
381 | else |
382 | return -EINVAL; |
383 | |
384 | return lp872x_update_bits(lp, addr, mask, data: val); |
385 | } |
386 | |
387 | static unsigned int lp872x_buck_get_mode(struct regulator_dev *rdev) |
388 | { |
389 | struct lp872x *lp = rdev_get_drvdata(rdev); |
390 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
391 | u8 addr, mask, val; |
392 | int ret; |
393 | |
394 | switch (buck) { |
395 | case LP8720_ID_BUCK: |
396 | addr = LP8720_BUCK_VOUT2; |
397 | mask = LP8720_BUCK_FPWM_M; |
398 | break; |
399 | case LP8725_ID_BUCK1: |
400 | addr = LP8725_BUCK_CTRL; |
401 | mask = LP8725_BUCK1_FPWM_M; |
402 | break; |
403 | case LP8725_ID_BUCK2: |
404 | addr = LP8725_BUCK_CTRL; |
405 | mask = LP8725_BUCK2_FPWM_M; |
406 | break; |
407 | default: |
408 | return -EINVAL; |
409 | } |
410 | |
411 | ret = lp872x_read_byte(lp, addr, data: &val); |
412 | if (ret) |
413 | return ret; |
414 | |
415 | return val & mask ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL; |
416 | } |
417 | |
418 | static const struct regulator_ops lp872x_ldo_ops = { |
419 | .list_voltage = regulator_list_voltage_table, |
420 | .map_voltage = regulator_map_voltage_ascend, |
421 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
422 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
423 | .enable = regulator_enable_regmap, |
424 | .disable = regulator_disable_regmap, |
425 | .is_enabled = regulator_is_enabled_regmap, |
426 | .enable_time = lp872x_regulator_enable_time, |
427 | }; |
428 | |
429 | static const struct regulator_ops lp8720_buck_ops = { |
430 | .list_voltage = regulator_list_voltage_table, |
431 | .map_voltage = regulator_map_voltage_ascend, |
432 | .set_voltage_sel = lp872x_buck_set_voltage_sel, |
433 | .get_voltage_sel = lp872x_buck_get_voltage_sel, |
434 | .enable = regulator_enable_regmap, |
435 | .disable = regulator_disable_regmap, |
436 | .is_enabled = regulator_is_enabled_regmap, |
437 | .enable_time = lp872x_regulator_enable_time, |
438 | .set_mode = lp872x_buck_set_mode, |
439 | .get_mode = lp872x_buck_get_mode, |
440 | }; |
441 | |
442 | static const struct regulator_ops lp8725_buck_ops = { |
443 | .list_voltage = regulator_list_voltage_table, |
444 | .map_voltage = regulator_map_voltage_ascend, |
445 | .set_voltage_sel = lp872x_buck_set_voltage_sel, |
446 | .get_voltage_sel = lp872x_buck_get_voltage_sel, |
447 | .enable = regulator_enable_regmap, |
448 | .disable = regulator_disable_regmap, |
449 | .is_enabled = regulator_is_enabled_regmap, |
450 | .enable_time = lp872x_regulator_enable_time, |
451 | .set_mode = lp872x_buck_set_mode, |
452 | .get_mode = lp872x_buck_get_mode, |
453 | .set_current_limit = regulator_set_current_limit_regmap, |
454 | .get_current_limit = regulator_get_current_limit_regmap, |
455 | }; |
456 | |
457 | static const struct regulator_desc lp8720_regulator_desc[] = { |
458 | { |
459 | .name = "ldo1" , |
460 | .of_match = of_match_ptr("ldo1" ), |
461 | .id = LP8720_ID_LDO1, |
462 | .ops = &lp872x_ldo_ops, |
463 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
464 | .volt_table = lp872x_ldo_vtbl, |
465 | .type = REGULATOR_VOLTAGE, |
466 | .owner = THIS_MODULE, |
467 | .vsel_reg = LP872X_LDO1_VOUT, |
468 | .vsel_mask = LP872X_VOUT_M, |
469 | .enable_reg = LP8720_ENABLE, |
470 | .enable_mask = LP872X_EN_LDO1_M, |
471 | }, |
472 | { |
473 | .name = "ldo2" , |
474 | .of_match = of_match_ptr("ldo2" ), |
475 | .id = LP8720_ID_LDO2, |
476 | .ops = &lp872x_ldo_ops, |
477 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
478 | .volt_table = lp872x_ldo_vtbl, |
479 | .type = REGULATOR_VOLTAGE, |
480 | .owner = THIS_MODULE, |
481 | .vsel_reg = LP872X_LDO2_VOUT, |
482 | .vsel_mask = LP872X_VOUT_M, |
483 | .enable_reg = LP8720_ENABLE, |
484 | .enable_mask = LP872X_EN_LDO2_M, |
485 | }, |
486 | { |
487 | .name = "ldo3" , |
488 | .of_match = of_match_ptr("ldo3" ), |
489 | .id = LP8720_ID_LDO3, |
490 | .ops = &lp872x_ldo_ops, |
491 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
492 | .volt_table = lp872x_ldo_vtbl, |
493 | .type = REGULATOR_VOLTAGE, |
494 | .owner = THIS_MODULE, |
495 | .vsel_reg = LP872X_LDO3_VOUT, |
496 | .vsel_mask = LP872X_VOUT_M, |
497 | .enable_reg = LP8720_ENABLE, |
498 | .enable_mask = LP872X_EN_LDO3_M, |
499 | }, |
500 | { |
501 | .name = "ldo4" , |
502 | .of_match = of_match_ptr("ldo4" ), |
503 | .id = LP8720_ID_LDO4, |
504 | .ops = &lp872x_ldo_ops, |
505 | .n_voltages = ARRAY_SIZE(lp8720_ldo4_vtbl), |
506 | .volt_table = lp8720_ldo4_vtbl, |
507 | .type = REGULATOR_VOLTAGE, |
508 | .owner = THIS_MODULE, |
509 | .vsel_reg = LP872X_LDO4_VOUT, |
510 | .vsel_mask = LP872X_VOUT_M, |
511 | .enable_reg = LP8720_ENABLE, |
512 | .enable_mask = LP872X_EN_LDO4_M, |
513 | }, |
514 | { |
515 | .name = "ldo5" , |
516 | .of_match = of_match_ptr("ldo5" ), |
517 | .id = LP8720_ID_LDO5, |
518 | .ops = &lp872x_ldo_ops, |
519 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
520 | .volt_table = lp872x_ldo_vtbl, |
521 | .type = REGULATOR_VOLTAGE, |
522 | .owner = THIS_MODULE, |
523 | .vsel_reg = LP872X_LDO5_VOUT, |
524 | .vsel_mask = LP872X_VOUT_M, |
525 | .enable_reg = LP8720_ENABLE, |
526 | .enable_mask = LP872X_EN_LDO5_M, |
527 | }, |
528 | { |
529 | .name = "buck" , |
530 | .of_match = of_match_ptr("buck" ), |
531 | .id = LP8720_ID_BUCK, |
532 | .ops = &lp8720_buck_ops, |
533 | .n_voltages = ARRAY_SIZE(lp8720_buck_vtbl), |
534 | .volt_table = lp8720_buck_vtbl, |
535 | .type = REGULATOR_VOLTAGE, |
536 | .owner = THIS_MODULE, |
537 | .enable_reg = LP8720_ENABLE, |
538 | .enable_mask = LP8720_EN_BUCK_M, |
539 | }, |
540 | }; |
541 | |
542 | static const struct regulator_desc lp8725_regulator_desc[] = { |
543 | { |
544 | .name = "ldo1" , |
545 | .of_match = of_match_ptr("ldo1" ), |
546 | .id = LP8725_ID_LDO1, |
547 | .ops = &lp872x_ldo_ops, |
548 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
549 | .volt_table = lp872x_ldo_vtbl, |
550 | .type = REGULATOR_VOLTAGE, |
551 | .owner = THIS_MODULE, |
552 | .vsel_reg = LP872X_LDO1_VOUT, |
553 | .vsel_mask = LP872X_VOUT_M, |
554 | .enable_reg = LP8725_LDO_CTRL, |
555 | .enable_mask = LP872X_EN_LDO1_M, |
556 | }, |
557 | { |
558 | .name = "ldo2" , |
559 | .of_match = of_match_ptr("ldo2" ), |
560 | .id = LP8725_ID_LDO2, |
561 | .ops = &lp872x_ldo_ops, |
562 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
563 | .volt_table = lp872x_ldo_vtbl, |
564 | .type = REGULATOR_VOLTAGE, |
565 | .owner = THIS_MODULE, |
566 | .vsel_reg = LP872X_LDO2_VOUT, |
567 | .vsel_mask = LP872X_VOUT_M, |
568 | .enable_reg = LP8725_LDO_CTRL, |
569 | .enable_mask = LP872X_EN_LDO2_M, |
570 | }, |
571 | { |
572 | .name = "ldo3" , |
573 | .of_match = of_match_ptr("ldo3" ), |
574 | .id = LP8725_ID_LDO3, |
575 | .ops = &lp872x_ldo_ops, |
576 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
577 | .volt_table = lp872x_ldo_vtbl, |
578 | .type = REGULATOR_VOLTAGE, |
579 | .owner = THIS_MODULE, |
580 | .vsel_reg = LP872X_LDO3_VOUT, |
581 | .vsel_mask = LP872X_VOUT_M, |
582 | .enable_reg = LP8725_LDO_CTRL, |
583 | .enable_mask = LP872X_EN_LDO3_M, |
584 | }, |
585 | { |
586 | .name = "ldo4" , |
587 | .of_match = of_match_ptr("ldo4" ), |
588 | .id = LP8725_ID_LDO4, |
589 | .ops = &lp872x_ldo_ops, |
590 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
591 | .volt_table = lp872x_ldo_vtbl, |
592 | .type = REGULATOR_VOLTAGE, |
593 | .owner = THIS_MODULE, |
594 | .vsel_reg = LP872X_LDO4_VOUT, |
595 | .vsel_mask = LP872X_VOUT_M, |
596 | .enable_reg = LP8725_LDO_CTRL, |
597 | .enable_mask = LP872X_EN_LDO4_M, |
598 | }, |
599 | { |
600 | .name = "ldo5" , |
601 | .of_match = of_match_ptr("ldo5" ), |
602 | .id = LP8725_ID_LDO5, |
603 | .ops = &lp872x_ldo_ops, |
604 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
605 | .volt_table = lp872x_ldo_vtbl, |
606 | .type = REGULATOR_VOLTAGE, |
607 | .owner = THIS_MODULE, |
608 | .vsel_reg = LP872X_LDO5_VOUT, |
609 | .vsel_mask = LP872X_VOUT_M, |
610 | .enable_reg = LP8725_LDO_CTRL, |
611 | .enable_mask = LP872X_EN_LDO5_M, |
612 | }, |
613 | { |
614 | .name = "lilo1" , |
615 | .of_match = of_match_ptr("lilo1" ), |
616 | .id = LP8725_ID_LILO1, |
617 | .ops = &lp872x_ldo_ops, |
618 | .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), |
619 | .volt_table = lp8725_lilo_vtbl, |
620 | .type = REGULATOR_VOLTAGE, |
621 | .owner = THIS_MODULE, |
622 | .vsel_reg = LP8725_LILO1_VOUT, |
623 | .vsel_mask = LP872X_VOUT_M, |
624 | .enable_reg = LP8725_LDO_CTRL, |
625 | .enable_mask = LP8725_EN_LILO1_M, |
626 | }, |
627 | { |
628 | .name = "lilo2" , |
629 | .of_match = of_match_ptr("lilo2" ), |
630 | .id = LP8725_ID_LILO2, |
631 | .ops = &lp872x_ldo_ops, |
632 | .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), |
633 | .volt_table = lp8725_lilo_vtbl, |
634 | .type = REGULATOR_VOLTAGE, |
635 | .owner = THIS_MODULE, |
636 | .vsel_reg = LP8725_LILO2_VOUT, |
637 | .vsel_mask = LP872X_VOUT_M, |
638 | .enable_reg = LP8725_LDO_CTRL, |
639 | .enable_mask = LP8725_EN_LILO2_M, |
640 | }, |
641 | { |
642 | .name = "buck1" , |
643 | .of_match = of_match_ptr("buck1" ), |
644 | .id = LP8725_ID_BUCK1, |
645 | .ops = &lp8725_buck_ops, |
646 | .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), |
647 | .volt_table = lp8725_buck_vtbl, |
648 | .type = REGULATOR_VOLTAGE, |
649 | .owner = THIS_MODULE, |
650 | .enable_reg = LP872X_GENERAL_CFG, |
651 | .enable_mask = LP8725_BUCK1_EN_M, |
652 | .curr_table = lp8725_buck_uA, |
653 | .n_current_limits = ARRAY_SIZE(lp8725_buck_uA), |
654 | .csel_reg = LP8725_BUCK1_VOUT2, |
655 | .csel_mask = LP8725_BUCK_CL_M, |
656 | }, |
657 | { |
658 | .name = "buck2" , |
659 | .of_match = of_match_ptr("buck2" ), |
660 | .id = LP8725_ID_BUCK2, |
661 | .ops = &lp8725_buck_ops, |
662 | .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), |
663 | .volt_table = lp8725_buck_vtbl, |
664 | .type = REGULATOR_VOLTAGE, |
665 | .owner = THIS_MODULE, |
666 | .enable_reg = LP872X_GENERAL_CFG, |
667 | .enable_mask = LP8725_BUCK2_EN_M, |
668 | .curr_table = lp8725_buck_uA, |
669 | .n_current_limits = ARRAY_SIZE(lp8725_buck_uA), |
670 | .csel_reg = LP8725_BUCK2_VOUT2, |
671 | .csel_mask = LP8725_BUCK_CL_M, |
672 | }, |
673 | }; |
674 | |
675 | static int lp872x_init_dvs(struct lp872x *lp) |
676 | { |
677 | struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; |
678 | enum gpiod_flags pinstate; |
679 | u8 mask[] = { LP8720_EXT_DVS_M, LP8725_DVS1_M | LP8725_DVS2_M }; |
680 | u8 default_dvs_mode[] = { LP8720_DEFAULT_DVS, LP8725_DEFAULT_DVS }; |
681 | |
682 | if (!dvs) |
683 | goto set_default_dvs_mode; |
684 | |
685 | if (!dvs->gpio) |
686 | goto set_default_dvs_mode; |
687 | |
688 | pinstate = dvs->init_state; |
689 | dvs->gpio = devm_gpiod_get_optional(dev: lp->dev, con_id: "ti,dvs" , flags: pinstate); |
690 | |
691 | if (IS_ERR(ptr: dvs->gpio)) { |
692 | dev_err(lp->dev, "gpio request err: %ld\n" , PTR_ERR(dvs->gpio)); |
693 | return PTR_ERR(ptr: dvs->gpio); |
694 | } |
695 | |
696 | lp->dvs_pin = pinstate; |
697 | |
698 | return 0; |
699 | |
700 | set_default_dvs_mode: |
701 | return lp872x_update_bits(lp, LP872X_GENERAL_CFG, mask: mask[lp->chipid], |
702 | data: default_dvs_mode[lp->chipid]); |
703 | } |
704 | |
705 | static int lp872x_hw_enable(struct lp872x *lp) |
706 | { |
707 | if (!lp->pdata) |
708 | return -EINVAL; |
709 | |
710 | if (!lp->pdata->enable_gpio) |
711 | return 0; |
712 | |
713 | /* Always set enable GPIO high. */ |
714 | lp->pdata->enable_gpio = devm_gpiod_get_optional(dev: lp->dev, con_id: "enable" , flags: GPIOD_OUT_HIGH); |
715 | if (IS_ERR(ptr: lp->pdata->enable_gpio)) { |
716 | dev_err(lp->dev, "gpio request err: %ld\n" , PTR_ERR(lp->pdata->enable_gpio)); |
717 | return PTR_ERR(ptr: lp->pdata->enable_gpio); |
718 | } |
719 | |
720 | /* Each chip has a different enable delay. */ |
721 | if (lp->chipid == LP8720) |
722 | usleep_range(LP8720_ENABLE_DELAY, max: 1.5 * LP8720_ENABLE_DELAY); |
723 | else |
724 | usleep_range(LP8725_ENABLE_DELAY, max: 1.5 * LP8725_ENABLE_DELAY); |
725 | |
726 | return 0; |
727 | } |
728 | |
729 | static int lp872x_config(struct lp872x *lp) |
730 | { |
731 | struct lp872x_platform_data *pdata = lp->pdata; |
732 | int ret; |
733 | |
734 | if (!pdata || !pdata->update_config) |
735 | goto init_dvs; |
736 | |
737 | ret = lp872x_write_byte(lp, LP872X_GENERAL_CFG, data: pdata->general_config); |
738 | if (ret) |
739 | return ret; |
740 | |
741 | init_dvs: |
742 | return lp872x_init_dvs(lp); |
743 | } |
744 | |
745 | static struct regulator_init_data |
746 | *lp872x_find_regulator_init_data(int id, struct lp872x *lp) |
747 | { |
748 | struct lp872x_platform_data *pdata = lp->pdata; |
749 | int i; |
750 | |
751 | if (!pdata) |
752 | return NULL; |
753 | |
754 | for (i = 0; i < lp->num_regulators; i++) { |
755 | if (pdata->regulator_data[i].id == id) |
756 | return pdata->regulator_data[i].init_data; |
757 | } |
758 | |
759 | return NULL; |
760 | } |
761 | |
762 | static int lp872x_regulator_register(struct lp872x *lp) |
763 | { |
764 | const struct regulator_desc *desc; |
765 | struct regulator_config cfg = { }; |
766 | struct regulator_dev *rdev; |
767 | int i; |
768 | |
769 | for (i = 0; i < lp->num_regulators; i++) { |
770 | desc = (lp->chipid == LP8720) ? &lp8720_regulator_desc[i] : |
771 | &lp8725_regulator_desc[i]; |
772 | |
773 | cfg.dev = lp->dev; |
774 | cfg.init_data = lp872x_find_regulator_init_data(id: desc->id, lp); |
775 | cfg.driver_data = lp; |
776 | cfg.regmap = lp->regmap; |
777 | |
778 | rdev = devm_regulator_register(dev: lp->dev, regulator_desc: desc, config: &cfg); |
779 | if (IS_ERR(ptr: rdev)) { |
780 | dev_err(lp->dev, "regulator register err" ); |
781 | return PTR_ERR(ptr: rdev); |
782 | } |
783 | } |
784 | |
785 | return 0; |
786 | } |
787 | |
788 | static const struct regmap_config lp872x_regmap_config = { |
789 | .reg_bits = 8, |
790 | .val_bits = 8, |
791 | .max_register = MAX_REGISTERS, |
792 | }; |
793 | |
794 | #ifdef CONFIG_OF |
795 | |
796 | #define LP872X_VALID_OPMODE (REGULATOR_MODE_FAST | REGULATOR_MODE_NORMAL) |
797 | |
798 | static struct of_regulator_match lp8720_matches[] = { |
799 | { .name = "ldo1" , .driver_data = (void *)LP8720_ID_LDO1, }, |
800 | { .name = "ldo2" , .driver_data = (void *)LP8720_ID_LDO2, }, |
801 | { .name = "ldo3" , .driver_data = (void *)LP8720_ID_LDO3, }, |
802 | { .name = "ldo4" , .driver_data = (void *)LP8720_ID_LDO4, }, |
803 | { .name = "ldo5" , .driver_data = (void *)LP8720_ID_LDO5, }, |
804 | { .name = "buck" , .driver_data = (void *)LP8720_ID_BUCK, }, |
805 | }; |
806 | |
807 | static struct of_regulator_match lp8725_matches[] = { |
808 | { .name = "ldo1" , .driver_data = (void *)LP8725_ID_LDO1, }, |
809 | { .name = "ldo2" , .driver_data = (void *)LP8725_ID_LDO2, }, |
810 | { .name = "ldo3" , .driver_data = (void *)LP8725_ID_LDO3, }, |
811 | { .name = "ldo4" , .driver_data = (void *)LP8725_ID_LDO4, }, |
812 | { .name = "ldo5" , .driver_data = (void *)LP8725_ID_LDO5, }, |
813 | { .name = "lilo1" , .driver_data = (void *)LP8725_ID_LILO1, }, |
814 | { .name = "lilo2" , .driver_data = (void *)LP8725_ID_LILO2, }, |
815 | { .name = "buck1" , .driver_data = (void *)LP8725_ID_BUCK1, }, |
816 | { .name = "buck2" , .driver_data = (void *)LP8725_ID_BUCK2, }, |
817 | }; |
818 | |
819 | static struct lp872x_platform_data |
820 | *lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which) |
821 | { |
822 | struct device_node *np = dev->of_node; |
823 | struct lp872x_platform_data *pdata; |
824 | struct of_regulator_match *match; |
825 | int num_matches; |
826 | int count; |
827 | int i; |
828 | u8 dvs_state; |
829 | |
830 | pdata = devm_kzalloc(dev, size: sizeof(*pdata), GFP_KERNEL); |
831 | if (!pdata) |
832 | return ERR_PTR(error: -ENOMEM); |
833 | |
834 | of_property_read_u8(np, propname: "ti,general-config" , out_value: &pdata->general_config); |
835 | pdata->update_config = of_property_read_bool(np, propname: "ti,update-config" ); |
836 | |
837 | pdata->dvs = devm_kzalloc(dev, size: sizeof(struct lp872x_dvs), GFP_KERNEL); |
838 | if (!pdata->dvs) |
839 | return ERR_PTR(error: -ENOMEM); |
840 | |
841 | of_property_read_u8(np, propname: "ti,dvs-vsel" , out_value: (u8 *)&pdata->dvs->vsel); |
842 | of_property_read_u8(np, propname: "ti,dvs-state" , out_value: &dvs_state); |
843 | pdata->dvs->init_state = dvs_state ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; |
844 | |
845 | if (of_get_child_count(np) == 0) |
846 | goto out; |
847 | |
848 | switch (which) { |
849 | case LP8720: |
850 | match = lp8720_matches; |
851 | num_matches = ARRAY_SIZE(lp8720_matches); |
852 | break; |
853 | case LP8725: |
854 | match = lp8725_matches; |
855 | num_matches = ARRAY_SIZE(lp8725_matches); |
856 | break; |
857 | default: |
858 | goto out; |
859 | } |
860 | |
861 | count = of_regulator_match(dev, node: np, matches: match, num_matches); |
862 | if (count <= 0) |
863 | goto out; |
864 | |
865 | for (i = 0; i < num_matches; i++) { |
866 | pdata->regulator_data[i].id = |
867 | (uintptr_t)match[i].driver_data; |
868 | pdata->regulator_data[i].init_data = match[i].init_data; |
869 | } |
870 | out: |
871 | return pdata; |
872 | } |
873 | #else |
874 | static struct lp872x_platform_data |
875 | *lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which) |
876 | { |
877 | return NULL; |
878 | } |
879 | #endif |
880 | |
881 | static int lp872x_probe(struct i2c_client *cl) |
882 | { |
883 | const struct i2c_device_id *id = i2c_client_get_device_id(client: cl); |
884 | struct lp872x *lp; |
885 | struct lp872x_platform_data *pdata; |
886 | int ret; |
887 | static const int lp872x_num_regulators[] = { |
888 | [LP8720] = LP8720_NUM_REGULATORS, |
889 | [LP8725] = LP8725_NUM_REGULATORS, |
890 | }; |
891 | |
892 | if (cl->dev.of_node) { |
893 | pdata = lp872x_populate_pdata_from_dt(dev: &cl->dev, |
894 | which: (enum lp872x_id)id->driver_data); |
895 | if (IS_ERR(ptr: pdata)) |
896 | return PTR_ERR(ptr: pdata); |
897 | } else { |
898 | pdata = dev_get_platdata(dev: &cl->dev); |
899 | } |
900 | |
901 | lp = devm_kzalloc(dev: &cl->dev, size: sizeof(struct lp872x), GFP_KERNEL); |
902 | if (!lp) |
903 | return -ENOMEM; |
904 | |
905 | lp->num_regulators = lp872x_num_regulators[id->driver_data]; |
906 | |
907 | lp->regmap = devm_regmap_init_i2c(cl, &lp872x_regmap_config); |
908 | if (IS_ERR(ptr: lp->regmap)) { |
909 | ret = PTR_ERR(ptr: lp->regmap); |
910 | dev_err(&cl->dev, "regmap init i2c err: %d\n" , ret); |
911 | return ret; |
912 | } |
913 | |
914 | lp->dev = &cl->dev; |
915 | lp->pdata = pdata; |
916 | lp->chipid = id->driver_data; |
917 | i2c_set_clientdata(client: cl, data: lp); |
918 | |
919 | ret = lp872x_hw_enable(lp); |
920 | if (ret) |
921 | return ret; |
922 | |
923 | ret = lp872x_config(lp); |
924 | if (ret) |
925 | return ret; |
926 | |
927 | return lp872x_regulator_register(lp); |
928 | } |
929 | |
930 | static const struct of_device_id lp872x_dt_ids[] __maybe_unused = { |
931 | { .compatible = "ti,lp8720" , }, |
932 | { .compatible = "ti,lp8725" , }, |
933 | { } |
934 | }; |
935 | MODULE_DEVICE_TABLE(of, lp872x_dt_ids); |
936 | |
937 | static const struct i2c_device_id lp872x_ids[] = { |
938 | {"lp8720" , LP8720}, |
939 | {"lp8725" , LP8725}, |
940 | { } |
941 | }; |
942 | MODULE_DEVICE_TABLE(i2c, lp872x_ids); |
943 | |
944 | static struct i2c_driver lp872x_driver = { |
945 | .driver = { |
946 | .name = "lp872x" , |
947 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
948 | .of_match_table = of_match_ptr(lp872x_dt_ids), |
949 | }, |
950 | .probe = lp872x_probe, |
951 | .id_table = lp872x_ids, |
952 | }; |
953 | |
954 | module_i2c_driver(lp872x_driver); |
955 | |
956 | MODULE_DESCRIPTION("TI/National Semiconductor LP872x PMU Regulator Driver" ); |
957 | MODULE_AUTHOR("Milo Kim" ); |
958 | MODULE_LICENSE("GPL" ); |
959 | |