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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Regulator driver for tps65090 power management chip.
4 *
5 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
6
7 */
8
9#include <linux/module.h>
10#include <linux/delay.h>
11#include <linux/init.h>
12#include <linux/of.h>
13#include <linux/gpio/consumer.h>
14#include <linux/slab.h>
15#include <linux/err.h>
16#include <linux/platform_device.h>
17#include <linux/regulator/driver.h>
18#include <linux/regulator/machine.h>
19#include <linux/regulator/of_regulator.h>
20#include <linux/mfd/tps65090.h>
21
22#define MAX_CTRL_READ_TRIES 5
23#define MAX_FET_ENABLE_TRIES 1000
24
25#define CTRL_EN_BIT 0 /* Regulator enable bit, active high */
26#define CTRL_WT_BIT 2 /* Regulator wait time 0 bit */
27#define CTRL_PG_BIT 4 /* Regulator power good bit, 1=good */
28#define CTRL_TO_BIT 7 /* Regulator timeout bit, 1=wait */
29
30#define MAX_OVERCURRENT_WAIT 3 /* Overcurrent wait must be <= this */
31
32/**
33 * struct tps65090_regulator - Per-regulator data for a tps65090 regulator
34 *
35 * @dev: Pointer to our device.
36 * @desc: The struct regulator_desc for the regulator.
37 * @rdev: The struct regulator_dev for the regulator.
38 * @overcurrent_wait_valid: True if overcurrent_wait is valid.
39 * @overcurrent_wait: For FETs, the value to put in the WTFET bitfield.
40 */
41
42struct tps65090_regulator {
43 struct device *dev;
44 struct regulator_desc *desc;
45 struct regulator_dev *rdev;
46 bool overcurrent_wait_valid;
47 int overcurrent_wait;
48};
49
50static struct regulator_ops tps65090_ext_control_ops = {
51};
52
53/**
54 * tps65090_reg_set_overcurrent_wait - Setup overcurrent wait
55 *
56 * This will set the overcurrent wait time based on what's in the regulator
57 * info.
58 *
59 * @ri: Overall regulator data
60 * @rdev: Regulator device
61 *
62 * Return: 0 if no error, non-zero if there was an error writing the register.
63 */
64static int tps65090_reg_set_overcurrent_wait(struct tps65090_regulator *ri,
65 struct regulator_dev *rdev)
66{
67 int ret;
68
69 ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
70 MAX_OVERCURRENT_WAIT << CTRL_WT_BIT,
71 ri->overcurrent_wait << CTRL_WT_BIT);
72 if (ret) {
73 dev_err(&rdev->dev, "Error updating overcurrent wait %#x\n",
74 rdev->desc->enable_reg);
75 }
76
77 return ret;
78}
79
80/**
81 * tps65090_try_enable_fet - Try to enable a FET
82 *
83 * @rdev: Regulator device
84 *
85 * Return: 0 if ok, -ENOTRECOVERABLE if the FET power good bit did not get
86 * set, or some other -ve value if another error occurred (e.g. i2c error)
87 */
88static int tps65090_try_enable_fet(struct regulator_dev *rdev)
89{
90 unsigned int control;
91 int ret, i;
92
93 ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
94 rdev->desc->enable_mask,
95 rdev->desc->enable_mask);
96 if (ret < 0) {
97 dev_err(&rdev->dev, "Error in updating reg %#x\n",
98 rdev->desc->enable_reg);
99 return ret;
100 }
101
102 for (i = 0; i < MAX_CTRL_READ_TRIES; i++) {
103 ret = regmap_read(rdev->regmap, rdev->desc->enable_reg,
104 &control);
105 if (ret < 0)
106 return ret;
107
108 if (!(control & BIT(CTRL_TO_BIT)))
109 break;
110
111 usleep_range(1000, 1500);
112 }
113 if (!(control & BIT(CTRL_PG_BIT)))
114 return -ENOTRECOVERABLE;
115
116 return 0;
117}
118
119/**
120 * tps65090_fet_enable - Enable a FET, trying a few times if it fails
121 *
122 * Some versions of the tps65090 have issues when turning on the FETs.
123 * This function goes through several steps to ensure the best chance of the
124 * FET going on. Specifically:
125 * - We'll make sure that we bump the "overcurrent wait" to the maximum, which
126 * increases the chances that we'll turn on properly.
127 * - We'll retry turning the FET on multiple times (turning off in between).
128 *
129 * @rdev: Regulator device
130 *
131 * Return: 0 if ok, non-zero if it fails.
132 */
133static int tps65090_fet_enable(struct regulator_dev *rdev)
134{
135 int ret, tries;
136
137 /*
138 * Try enabling multiple times until we succeed since sometimes the
139 * first try times out.
140 */
141 tries = 0;
142 while (true) {
143 ret = tps65090_try_enable_fet(rdev);
144 if (!ret)
145 break;
146 if (ret != -ENOTRECOVERABLE || tries == MAX_FET_ENABLE_TRIES)
147 goto err;
148
149 /* Try turning the FET off (and then on again) */
150 ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
151 rdev->desc->enable_mask, 0);
152 if (ret)
153 goto err;
154
155 tries++;
156 }
157
158 if (tries)
159 dev_warn(&rdev->dev, "reg %#x enable ok after %d tries\n",
160 rdev->desc->enable_reg, tries);
161
162 return 0;
163err:
164 dev_warn(&rdev->dev, "reg %#x enable failed\n", rdev->desc->enable_reg);
165 WARN_ON(1);
166
167 return ret;
168}
169
170static struct regulator_ops tps65090_reg_control_ops = {
171 .enable = regulator_enable_regmap,
172 .disable = regulator_disable_regmap,
173 .is_enabled = regulator_is_enabled_regmap,
174};
175
176static struct regulator_ops tps65090_fet_control_ops = {
177 .enable = tps65090_fet_enable,
178 .disable = regulator_disable_regmap,
179 .is_enabled = regulator_is_enabled_regmap,
180};
181
182static struct regulator_ops tps65090_ldo_ops = {
183};
184
185#define tps65090_REG_DESC(_id, _sname, _en_reg, _en_bits, _nvolt, _volt, _ops) \
186{ \
187 .name = "TPS65090_RAILS"#_id, \
188 .supply_name = _sname, \
189 .id = TPS65090_REGULATOR_##_id, \
190 .n_voltages = _nvolt, \
191 .ops = &_ops, \
192 .fixed_uV = _volt, \
193 .enable_reg = _en_reg, \
194 .enable_val = _en_bits, \
195 .enable_mask = _en_bits, \
196 .type = REGULATOR_VOLTAGE, \
197 .owner = THIS_MODULE, \
198}
199
200#define tps65090_REG_FIXEDV(_id, _sname, en_reg, _en_bits, _volt, _ops) \
201 tps65090_REG_DESC(_id, _sname, en_reg, _en_bits, 1, _volt, _ops)
202
203#define tps65090_REG_SWITCH(_id, _sname, en_reg, _en_bits, _ops) \
204 tps65090_REG_DESC(_id, _sname, en_reg, _en_bits, 0, 0, _ops)
205
206static struct regulator_desc tps65090_regulator_desc[] = {
207 tps65090_REG_FIXEDV(DCDC1, "vsys1", 0x0C, BIT(CTRL_EN_BIT), 5000000,
208 tps65090_reg_control_ops),
209 tps65090_REG_FIXEDV(DCDC2, "vsys2", 0x0D, BIT(CTRL_EN_BIT), 3300000,
210 tps65090_reg_control_ops),
211 tps65090_REG_SWITCH(DCDC3, "vsys3", 0x0E, BIT(CTRL_EN_BIT),
212 tps65090_reg_control_ops),
213
214 tps65090_REG_SWITCH(FET1, "infet1", 0x0F,
215 BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT),
216 tps65090_fet_control_ops),
217 tps65090_REG_SWITCH(FET2, "infet2", 0x10,
218 BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT),
219 tps65090_fet_control_ops),
220 tps65090_REG_SWITCH(FET3, "infet3", 0x11,
221 BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT),
222 tps65090_fet_control_ops),
223 tps65090_REG_SWITCH(FET4, "infet4", 0x12,
224 BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT),
225 tps65090_fet_control_ops),
226 tps65090_REG_SWITCH(FET5, "infet5", 0x13,
227 BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT),
228 tps65090_fet_control_ops),
229 tps65090_REG_SWITCH(FET6, "infet6", 0x14,
230 BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT),
231 tps65090_fet_control_ops),
232 tps65090_REG_SWITCH(FET7, "infet7", 0x15,
233 BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT),
234 tps65090_fet_control_ops),
235
236 tps65090_REG_FIXEDV(LDO1, "vsys-l1", 0, 0, 5000000,
237 tps65090_ldo_ops),
238 tps65090_REG_FIXEDV(LDO2, "vsys-l2", 0, 0, 3300000,
239 tps65090_ldo_ops),
240};
241
242static inline bool is_dcdc(int id)
243{
244 switch (id) {
245 case TPS65090_REGULATOR_DCDC1:
246 case TPS65090_REGULATOR_DCDC2:
247 case TPS65090_REGULATOR_DCDC3:
248 return true;
249 default:
250 return false;
251 }
252}
253
254static int tps65090_config_ext_control(
255 struct tps65090_regulator *ri, bool enable)
256{
257 int ret;
258 struct device *parent = ri->dev->parent;
259 unsigned int reg_en_reg = ri->desc->enable_reg;
260
261 if (enable)
262 ret = tps65090_set_bits(parent, reg_en_reg, 1);
263 else
264 ret = tps65090_clr_bits(parent, reg_en_reg, 1);
265 if (ret < 0)
266 dev_err(ri->dev, "Error in updating reg 0x%x\n", reg_en_reg);
267 return ret;
268}
269
270static int tps65090_regulator_disable_ext_control(
271 struct tps65090_regulator *ri,
272 struct tps65090_regulator_plat_data *tps_pdata)
273{
274 int ret = 0;
275 struct device *parent = ri->dev->parent;
276 unsigned int reg_en_reg = ri->desc->enable_reg;
277
278 /*
279 * First enable output for internal control if require.
280 * And then disable external control.
281 */
282 if (tps_pdata->reg_init_data->constraints.always_on ||
283 tps_pdata->reg_init_data->constraints.boot_on) {
284 ret = tps65090_set_bits(parent, reg_en_reg, 0);
285 if (ret < 0) {
286 dev_err(ri->dev, "Error in set reg 0x%x\n", reg_en_reg);
287 return ret;
288 }
289 }
290 return tps65090_config_ext_control(ri, false);
291}
292
293#ifdef CONFIG_OF
294static struct of_regulator_match tps65090_matches[] = {
295 { .name = "dcdc1", },
296 { .name = "dcdc2", },
297 { .name = "dcdc3", },
298 { .name = "fet1", },
299 { .name = "fet2", },
300 { .name = "fet3", },
301 { .name = "fet4", },
302 { .name = "fet5", },
303 { .name = "fet6", },
304 { .name = "fet7", },
305 { .name = "ldo1", },
306 { .name = "ldo2", },
307};
308
309static struct tps65090_platform_data *tps65090_parse_dt_reg_data(
310 struct platform_device *pdev,
311 struct of_regulator_match **tps65090_reg_matches)
312{
313 struct tps65090_platform_data *tps65090_pdata;
314 struct device_node *np = pdev->dev.parent->of_node;
315 struct device_node *regulators;
316 int idx = 0, ret;
317 struct tps65090_regulator_plat_data *reg_pdata;
318
319 tps65090_pdata = devm_kzalloc(&pdev->dev, sizeof(*tps65090_pdata),
320 GFP_KERNEL);
321 if (!tps65090_pdata)
322 return ERR_PTR(-ENOMEM);
323
324 reg_pdata = devm_kcalloc(&pdev->dev,
325 TPS65090_REGULATOR_MAX, sizeof(*reg_pdata),
326 GFP_KERNEL);
327 if (!reg_pdata)
328 return ERR_PTR(-ENOMEM);
329
330 regulators = of_get_child_by_name(np, "regulators");
331 if (!regulators) {
332 dev_err(&pdev->dev, "regulator node not found\n");
333 return ERR_PTR(-ENODEV);
334 }
335
336 ret = of_regulator_match(&pdev->dev, regulators, tps65090_matches,
337 ARRAY_SIZE(tps65090_matches));
338 of_node_put(regulators);
339 if (ret < 0) {
340 dev_err(&pdev->dev,
341 "Error parsing regulator init data: %d\n", ret);
342 return ERR_PTR(ret);
343 }
344
345 *tps65090_reg_matches = tps65090_matches;
346 for (idx = 0; idx < ARRAY_SIZE(tps65090_matches); idx++) {
347 struct regulator_init_data *ri_data;
348 struct tps65090_regulator_plat_data *rpdata;
349 struct device_node *np;
350
351 rpdata = ®_pdata[idx];
352 ri_data = tps65090_matches[idx].init_data;
353 if (!ri_data)
354 continue;
355
356 np = tps65090_matches[idx].of_node;
357 if (!np)
358 continue;
359
360 rpdata->reg_init_data = ri_data;
361 rpdata->enable_ext_control = of_property_read_bool(np,
362 "ti,enable-ext-control");
363 if (rpdata->enable_ext_control) {
364 enum gpiod_flags gflags;
365
366 if (ri_data->constraints.always_on ||
367 ri_data->constraints.boot_on)
368 gflags = GPIOD_OUT_HIGH;
369 else
370 gflags = GPIOD_OUT_LOW;
371 gflags |= GPIOD_FLAGS_BIT_NONEXCLUSIVE;
372
373 rpdata->gpiod = devm_fwnode_gpiod_get(
374 &pdev->dev,
375 of_fwnode_handle(np),
376 "dcdc-ext-control",
377 gflags,
378 "tps65090");
379 if (PTR_ERR(rpdata->gpiod) == -ENOENT) {
380 dev_err(&pdev->dev,
381 "could not find DCDC external control GPIO\n");
382 rpdata->gpiod = NULL;
383 } else if (IS_ERR(rpdata->gpiod))
384 return ERR_CAST(rpdata->gpiod);
385 }
386
387 if (of_property_read_u32(np, "ti,overcurrent-wait",
388 &rpdata->overcurrent_wait) == 0)
389 rpdata->overcurrent_wait_valid = true;
390
391 tps65090_pdata->reg_pdata[idx] = rpdata;
392 }
393 return tps65090_pdata;
394}
395#else
396static inline struct tps65090_platform_data *tps65090_parse_dt_reg_data(
397 struct platform_device *pdev,
398 struct of_regulator_match **tps65090_reg_matches)
399{
400 *tps65090_reg_matches = NULL;
401 return NULL;
402}
403#endif
404
405static int tps65090_regulator_probe(struct platform_device *pdev)
406{
407 struct tps65090 *tps65090_mfd = dev_get_drvdata(pdev->dev.parent);
408 struct tps65090_regulator *ri = NULL;
409 struct regulator_config config = { };
410 struct regulator_dev *rdev;
411 struct tps65090_regulator_plat_data *tps_pdata;
412 struct tps65090_regulator *pmic;
413 struct tps65090_platform_data *tps65090_pdata;
414 struct of_regulator_match *tps65090_reg_matches = NULL;
415 int num;
416 int ret;
417
418 dev_dbg(&pdev->dev, "Probing regulator\n");
419
420 tps65090_pdata = dev_get_platdata(pdev->dev.parent);
421 if (!tps65090_pdata && tps65090_mfd->dev->of_node)
422 tps65090_pdata = tps65090_parse_dt_reg_data(pdev,
423 &tps65090_reg_matches);
424 if (IS_ERR_OR_NULL(tps65090_pdata)) {
425 dev_err(&pdev->dev, "Platform data missing\n");
426 return tps65090_pdata ? PTR_ERR(tps65090_pdata) : -EINVAL;
427 }
428
429 pmic = devm_kcalloc(&pdev->dev,
430 TPS65090_REGULATOR_MAX, sizeof(*pmic),
431 GFP_KERNEL);
432 if (!pmic)
433 return -ENOMEM;
434
435 for (num = 0; num < TPS65090_REGULATOR_MAX; num++) {
436 tps_pdata = tps65090_pdata->reg_pdata[num];
437
438 ri = &pmic[num];
439 ri->dev = &pdev->dev;
440 ri->desc = &tps65090_regulator_desc[num];
441 if (tps_pdata) {
442 ri->overcurrent_wait_valid =
443 tps_pdata->overcurrent_wait_valid;
444 ri->overcurrent_wait = tps_pdata->overcurrent_wait;
445 }
446
447 /*
448 * TPS5090 DCDC support the control from external digital input.
449 * Configure it as per platform data.
450 */
451 if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) {
452 if (tps_pdata->enable_ext_control) {
453 config.ena_gpiod = tps_pdata->gpiod;
454 ri->desc->ops = &tps65090_ext_control_ops;
455 } else {
456 ret = tps65090_regulator_disable_ext_control(
457 ri, tps_pdata);
458 if (ret < 0) {
459 dev_err(&pdev->dev,
460 "failed disable ext control\n");
461 return ret;
462 }
463 }
464 }
465
466 config.dev = pdev->dev.parent;
467 config.driver_data = ri;
468 config.regmap = tps65090_mfd->rmap;
469 if (tps_pdata)
470 config.init_data = tps_pdata->reg_init_data;
471 else
472 config.init_data = NULL;
473 if (tps65090_reg_matches)
474 config.of_node = tps65090_reg_matches[num].of_node;
475 else
476 config.of_node = NULL;
477
478 /*
479 * Hand the GPIO descriptor management over to the regulator
480 * core, remove it from devres management.
481 */
482 if (config.ena_gpiod)
483 devm_gpiod_unhinge(&pdev->dev, config.ena_gpiod);
484 rdev = devm_regulator_register(&pdev->dev, ri->desc, &config);
485 if (IS_ERR(rdev)) {
486 dev_err(&pdev->dev, "failed to register regulator %s\n",
487 ri->desc->name);
488 return PTR_ERR(rdev);
489 }
490 ri->rdev = rdev;
491
492 if (ri->overcurrent_wait_valid) {
493 ret = tps65090_reg_set_overcurrent_wait(ri, rdev);
494 if (ret < 0)
495 return ret;
496 }
497
498 /* Enable external control if it is require */
499 if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data &&
500 tps_pdata->enable_ext_control) {
501 ret = tps65090_config_ext_control(ri, true);
502 if (ret < 0)
503 return ret;
504 }
505 }
506
507 platform_set_drvdata(pdev, pmic);
508 return 0;
509}
510
511static struct platform_driver tps65090_regulator_driver = {
512 .driver = {
513 .name = "tps65090-pmic",
514 },
515 .probe = tps65090_regulator_probe,
516};
517
518static int __init tps65090_regulator_init(void)
519{
520 return platform_driver_register(&tps65090_regulator_driver);
521}
522subsys_initcall(tps65090_regulator_init);
523
524static void __exit tps65090_regulator_exit(void)
525{
526 platform_driver_unregister(&tps65090_regulator_driver);
527}
528module_exit(tps65090_regulator_exit);
529
530MODULE_DESCRIPTION("tps65090 regulator driver");
531MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
532MODULE_LICENSE("GPL v2");
533MODULE_ALIAS("platform:tps65090-pmic");
1/*
2 * Regulator driver for tps65090 power management chip.
3 *
4 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
5
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>
17 */
18
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/gpio.h>
22#include <linux/of_gpio.h>
23#include <linux/slab.h>
24#include <linux/err.h>
25#include <linux/platform_device.h>
26#include <linux/regulator/driver.h>
27#include <linux/regulator/machine.h>
28#include <linux/regulator/of_regulator.h>
29#include <linux/mfd/tps65090.h>
30
31struct tps65090_regulator {
32 struct device *dev;
33 struct regulator_desc *desc;
34 struct regulator_dev *rdev;
35};
36
37static struct regulator_ops tps65090_ext_control_ops = {
38};
39
40static struct regulator_ops tps65090_reg_contol_ops = {
41 .enable = regulator_enable_regmap,
42 .disable = regulator_disable_regmap,
43 .is_enabled = regulator_is_enabled_regmap,
44};
45
46static struct regulator_ops tps65090_ldo_ops = {
47};
48
49#define tps65090_REG_DESC(_id, _sname, _en_reg, _ops) \
50{ \
51 .name = "TPS65090_RAILS"#_id, \
52 .supply_name = _sname, \
53 .id = TPS65090_REGULATOR_##_id, \
54 .ops = &_ops, \
55 .enable_reg = _en_reg, \
56 .enable_mask = BIT(0), \
57 .type = REGULATOR_VOLTAGE, \
58 .owner = THIS_MODULE, \
59}
60
61static struct regulator_desc tps65090_regulator_desc[] = {
62 tps65090_REG_DESC(DCDC1, "vsys1", 0x0C, tps65090_reg_contol_ops),
63 tps65090_REG_DESC(DCDC2, "vsys2", 0x0D, tps65090_reg_contol_ops),
64 tps65090_REG_DESC(DCDC3, "vsys3", 0x0E, tps65090_reg_contol_ops),
65 tps65090_REG_DESC(FET1, "infet1", 0x0F, tps65090_reg_contol_ops),
66 tps65090_REG_DESC(FET2, "infet2", 0x10, tps65090_reg_contol_ops),
67 tps65090_REG_DESC(FET3, "infet3", 0x11, tps65090_reg_contol_ops),
68 tps65090_REG_DESC(FET4, "infet4", 0x12, tps65090_reg_contol_ops),
69 tps65090_REG_DESC(FET5, "infet5", 0x13, tps65090_reg_contol_ops),
70 tps65090_REG_DESC(FET6, "infet6", 0x14, tps65090_reg_contol_ops),
71 tps65090_REG_DESC(FET7, "infet7", 0x15, tps65090_reg_contol_ops),
72 tps65090_REG_DESC(LDO1, "vsys-l1", 0, tps65090_ldo_ops),
73 tps65090_REG_DESC(LDO2, "vsys-l2", 0, tps65090_ldo_ops),
74};
75
76static inline bool is_dcdc(int id)
77{
78 switch (id) {
79 case TPS65090_REGULATOR_DCDC1:
80 case TPS65090_REGULATOR_DCDC2:
81 case TPS65090_REGULATOR_DCDC3:
82 return true;
83 default:
84 return false;
85 }
86}
87
88static int tps65090_config_ext_control(
89 struct tps65090_regulator *ri, bool enable)
90{
91 int ret;
92 struct device *parent = ri->dev->parent;
93 unsigned int reg_en_reg = ri->desc->enable_reg;
94
95 if (enable)
96 ret = tps65090_set_bits(parent, reg_en_reg, 1);
97 else
98 ret = tps65090_clr_bits(parent, reg_en_reg, 1);
99 if (ret < 0)
100 dev_err(ri->dev, "Error in updating reg 0x%x\n", reg_en_reg);
101 return ret;
102}
103
104static int tps65090_regulator_disable_ext_control(
105 struct tps65090_regulator *ri,
106 struct tps65090_regulator_plat_data *tps_pdata)
107{
108 int ret = 0;
109 struct device *parent = ri->dev->parent;
110 unsigned int reg_en_reg = ri->desc->enable_reg;
111
112 /*
113 * First enable output for internal control if require.
114 * And then disable external control.
115 */
116 if (tps_pdata->reg_init_data->constraints.always_on ||
117 tps_pdata->reg_init_data->constraints.boot_on) {
118 ret = tps65090_set_bits(parent, reg_en_reg, 0);
119 if (ret < 0) {
120 dev_err(ri->dev, "Error in set reg 0x%x\n", reg_en_reg);
121 return ret;
122 }
123 }
124 return tps65090_config_ext_control(ri, false);
125}
126
127static void tps65090_configure_regulator_config(
128 struct tps65090_regulator_plat_data *tps_pdata,
129 struct regulator_config *config)
130{
131 if (gpio_is_valid(tps_pdata->gpio)) {
132 int gpio_flag = GPIOF_OUT_INIT_LOW;
133
134 if (tps_pdata->reg_init_data->constraints.always_on ||
135 tps_pdata->reg_init_data->constraints.boot_on)
136 gpio_flag = GPIOF_OUT_INIT_HIGH;
137
138 config->ena_gpio = tps_pdata->gpio;
139 config->ena_gpio_flags = gpio_flag;
140 }
141}
142
143#ifdef CONFIG_OF
144static struct of_regulator_match tps65090_matches[] = {
145 { .name = "dcdc1", },
146 { .name = "dcdc2", },
147 { .name = "dcdc3", },
148 { .name = "fet1", },
149 { .name = "fet2", },
150 { .name = "fet3", },
151 { .name = "fet4", },
152 { .name = "fet5", },
153 { .name = "fet6", },
154 { .name = "fet7", },
155 { .name = "ldo1", },
156 { .name = "ldo2", },
157};
158
159static struct tps65090_platform_data *tps65090_parse_dt_reg_data(
160 struct platform_device *pdev,
161 struct of_regulator_match **tps65090_reg_matches)
162{
163 struct tps65090_platform_data *tps65090_pdata;
164 struct device_node *np = pdev->dev.parent->of_node;
165 struct device_node *regulators;
166 int idx = 0, ret;
167 struct tps65090_regulator_plat_data *reg_pdata;
168
169 tps65090_pdata = devm_kzalloc(&pdev->dev, sizeof(*tps65090_pdata),
170 GFP_KERNEL);
171 if (!tps65090_pdata)
172 return ERR_PTR(-ENOMEM);
173
174 reg_pdata = devm_kzalloc(&pdev->dev, TPS65090_REGULATOR_MAX *
175 sizeof(*reg_pdata), GFP_KERNEL);
176 if (!reg_pdata)
177 return ERR_PTR(-ENOMEM);
178
179 regulators = of_get_child_by_name(np, "regulators");
180 if (!regulators) {
181 dev_err(&pdev->dev, "regulator node not found\n");
182 return ERR_PTR(-ENODEV);
183 }
184
185 ret = of_regulator_match(&pdev->dev, regulators, tps65090_matches,
186 ARRAY_SIZE(tps65090_matches));
187 of_node_put(regulators);
188 if (ret < 0) {
189 dev_err(&pdev->dev,
190 "Error parsing regulator init data: %d\n", ret);
191 return ERR_PTR(ret);
192 }
193
194 *tps65090_reg_matches = tps65090_matches;
195 for (idx = 0; idx < ARRAY_SIZE(tps65090_matches); idx++) {
196 struct regulator_init_data *ri_data;
197 struct tps65090_regulator_plat_data *rpdata;
198
199 rpdata = ®_pdata[idx];
200 ri_data = tps65090_matches[idx].init_data;
201 if (!ri_data || !tps65090_matches[idx].of_node)
202 continue;
203
204 rpdata->reg_init_data = ri_data;
205 rpdata->enable_ext_control = of_property_read_bool(
206 tps65090_matches[idx].of_node,
207 "ti,enable-ext-control");
208 if (rpdata->enable_ext_control)
209 rpdata->gpio = of_get_named_gpio(np,
210 "dcdc-ext-control-gpios", 0);
211
212 tps65090_pdata->reg_pdata[idx] = rpdata;
213 }
214 return tps65090_pdata;
215}
216#else
217static inline struct tps65090_platform_data *tps65090_parse_dt_reg_data(
218 struct platform_device *pdev,
219 struct of_regulator_match **tps65090_reg_matches)
220{
221 *tps65090_reg_matches = NULL;
222 return NULL;
223}
224#endif
225
226static int tps65090_regulator_probe(struct platform_device *pdev)
227{
228 struct tps65090 *tps65090_mfd = dev_get_drvdata(pdev->dev.parent);
229 struct tps65090_regulator *ri = NULL;
230 struct regulator_config config = { };
231 struct regulator_dev *rdev;
232 struct tps65090_regulator_plat_data *tps_pdata;
233 struct tps65090_regulator *pmic;
234 struct tps65090_platform_data *tps65090_pdata;
235 struct of_regulator_match *tps65090_reg_matches = NULL;
236 int num;
237 int ret;
238
239 dev_dbg(&pdev->dev, "Probing regulator\n");
240
241 tps65090_pdata = dev_get_platdata(pdev->dev.parent);
242 if (!tps65090_pdata && tps65090_mfd->dev->of_node)
243 tps65090_pdata = tps65090_parse_dt_reg_data(pdev,
244 &tps65090_reg_matches);
245 if (IS_ERR_OR_NULL(tps65090_pdata)) {
246 dev_err(&pdev->dev, "Platform data missing\n");
247 return tps65090_pdata ? PTR_ERR(tps65090_pdata) : -EINVAL;
248 }
249
250 pmic = devm_kzalloc(&pdev->dev, TPS65090_REGULATOR_MAX * sizeof(*pmic),
251 GFP_KERNEL);
252 if (!pmic)
253 return -ENOMEM;
254
255 for (num = 0; num < TPS65090_REGULATOR_MAX; num++) {
256 tps_pdata = tps65090_pdata->reg_pdata[num];
257
258 ri = &pmic[num];
259 ri->dev = &pdev->dev;
260 ri->desc = &tps65090_regulator_desc[num];
261
262 /*
263 * TPS5090 DCDC support the control from external digital input.
264 * Configure it as per platform data.
265 */
266 if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) {
267 if (tps_pdata->enable_ext_control) {
268 tps65090_configure_regulator_config(
269 tps_pdata, &config);
270 ri->desc->ops = &tps65090_ext_control_ops;
271 } else {
272 ret = tps65090_regulator_disable_ext_control(
273 ri, tps_pdata);
274 if (ret < 0) {
275 dev_err(&pdev->dev,
276 "failed disable ext control\n");
277 return ret;
278 }
279 }
280 }
281
282 config.dev = pdev->dev.parent;
283 config.driver_data = ri;
284 config.regmap = tps65090_mfd->rmap;
285 if (tps_pdata)
286 config.init_data = tps_pdata->reg_init_data;
287 else
288 config.init_data = NULL;
289 if (tps65090_reg_matches)
290 config.of_node = tps65090_reg_matches[num].of_node;
291 else
292 config.of_node = NULL;
293
294 rdev = devm_regulator_register(&pdev->dev, ri->desc, &config);
295 if (IS_ERR(rdev)) {
296 dev_err(&pdev->dev, "failed to register regulator %s\n",
297 ri->desc->name);
298 return PTR_ERR(rdev);
299 }
300 ri->rdev = rdev;
301
302 /* Enable external control if it is require */
303 if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data &&
304 tps_pdata->enable_ext_control) {
305 ret = tps65090_config_ext_control(ri, true);
306 if (ret < 0)
307 return ret;
308 }
309 }
310
311 platform_set_drvdata(pdev, pmic);
312 return 0;
313}
314
315static struct platform_driver tps65090_regulator_driver = {
316 .driver = {
317 .name = "tps65090-pmic",
318 .owner = THIS_MODULE,
319 },
320 .probe = tps65090_regulator_probe,
321};
322
323static int __init tps65090_regulator_init(void)
324{
325 return platform_driver_register(&tps65090_regulator_driver);
326}
327subsys_initcall(tps65090_regulator_init);
328
329static void __exit tps65090_regulator_exit(void)
330{
331 platform_driver_unregister(&tps65090_regulator_driver);
332}
333module_exit(tps65090_regulator_exit);
334
335MODULE_DESCRIPTION("tps65090 regulator driver");
336MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
337MODULE_LICENSE("GPL v2");
338MODULE_ALIAS("platform:tps65090-pmic");