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