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6219929f LD |
1 | /* |
2 | * tps62360.c -- TI tps62360 | |
3 | * | |
d1cf4f65 | 4 | * Driver for processor core supply tps62360, tps62361B, tps62362 and tps62363. |
6219929f LD |
5 | * |
6 | * Copyright (c) 2012, NVIDIA Corporation. | |
7 | * | |
8 | * Author: Laxman Dewangan <ldewangan@nvidia.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License as | |
12 | * published by the Free Software Foundation version 2. | |
13 | * | |
14 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, | |
15 | * whether express or implied; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
22 | * 02111-1307, USA | |
23 | */ | |
24 | ||
25 | #include <linux/kernel.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/err.h> | |
684ae39b LD |
29 | #include <linux/of.h> |
30 | #include <linux/of_device.h> | |
31 | #include <linux/of_gpio.h> | |
32 | #include <linux/regulator/of_regulator.h> | |
6219929f LD |
33 | #include <linux/platform_device.h> |
34 | #include <linux/regulator/driver.h> | |
35 | #include <linux/regulator/machine.h> | |
36 | #include <linux/regulator/tps62360.h> | |
37 | #include <linux/gpio.h> | |
38 | #include <linux/i2c.h> | |
6219929f LD |
39 | #include <linux/slab.h> |
40 | #include <linux/regmap.h> | |
41 | ||
42 | /* Register definitions */ | |
43 | #define REG_VSET0 0 | |
44 | #define REG_VSET1 1 | |
45 | #define REG_VSET2 2 | |
46 | #define REG_VSET3 3 | |
47 | #define REG_CONTROL 4 | |
48 | #define REG_TEMP 5 | |
49 | #define REG_RAMPCTRL 6 | |
50 | #define REG_CHIPID 8 | |
51 | ||
d1cf4f65 | 52 | enum chips {TPS62360, TPS62361, TPS62362, TPS62363}; |
6219929f | 53 | |
2935fb18 | 54 | #define TPS62360_BASE_VOLTAGE 770000 |
6219929f LD |
55 | #define TPS62360_N_VOLTAGES 64 |
56 | ||
2935fb18 | 57 | #define TPS62361_BASE_VOLTAGE 500000 |
6219929f LD |
58 | #define TPS62361_N_VOLTAGES 128 |
59 | ||
60 | /* tps 62360 chip information */ | |
61 | struct tps62360_chip { | |
6219929f LD |
62 | struct device *dev; |
63 | struct regulator_desc desc; | |
6219929f LD |
64 | struct regulator_dev *rdev; |
65 | struct regmap *regmap; | |
66 | int chip_id; | |
67 | int vsel0_gpio; | |
68 | int vsel1_gpio; | |
69 | int voltage_base; | |
70 | u8 voltage_reg_mask; | |
71 | bool en_internal_pulldn; | |
72 | bool en_force_pwm; | |
73 | bool en_discharge; | |
74 | bool valid_gpios; | |
75 | int lru_index[4]; | |
76 | int curr_vset_vsel[4]; | |
77 | int curr_vset_id; | |
a60cfce0 | 78 | int change_uv_per_us; |
6219929f LD |
79 | }; |
80 | ||
81 | /* | |
82 | * find_voltage_set_register: Find new voltage configuration register | |
83 | * (VSET) id. | |
84 | * The finding of the new VSET register will be based on the LRU mechanism. | |
85 | * Each VSET register will have different voltage configured . This | |
86 | * Function will look if any of the VSET register have requested voltage set | |
87 | * or not. | |
88 | * - If it is already there then it will make that register as most | |
89 | * recently used and return as found so that caller need not to set | |
90 | * the VSET register but need to set the proper gpios to select this | |
91 | * VSET register. | |
92 | * - If requested voltage is not found then it will use the least | |
93 | * recently mechanism to get new VSET register for new configuration | |
94 | * and will return not_found so that caller need to set new VSET | |
95 | * register and then gpios (both). | |
96 | */ | |
97 | static bool find_voltage_set_register(struct tps62360_chip *tps, | |
98 | int req_vsel, int *vset_reg_id) | |
99 | { | |
100 | int i; | |
101 | bool found = false; | |
102 | int new_vset_reg = tps->lru_index[3]; | |
103 | int found_index = 3; | |
2935fb18 | 104 | |
6219929f LD |
105 | for (i = 0; i < 4; ++i) { |
106 | if (tps->curr_vset_vsel[tps->lru_index[i]] == req_vsel) { | |
107 | new_vset_reg = tps->lru_index[i]; | |
108 | found_index = i; | |
109 | found = true; | |
110 | goto update_lru_index; | |
111 | } | |
112 | } | |
113 | ||
114 | update_lru_index: | |
115 | for (i = found_index; i > 0; i--) | |
116 | tps->lru_index[i] = tps->lru_index[i - 1]; | |
117 | ||
118 | tps->lru_index[0] = new_vset_reg; | |
119 | *vset_reg_id = new_vset_reg; | |
120 | return found; | |
121 | } | |
122 | ||
a60cfce0 | 123 | static int tps62360_dcdc_get_voltage_sel(struct regulator_dev *dev) |
6219929f LD |
124 | { |
125 | struct tps62360_chip *tps = rdev_get_drvdata(dev); | |
126 | int vsel; | |
127 | unsigned int data; | |
128 | int ret; | |
129 | ||
130 | ret = regmap_read(tps->regmap, REG_VSET0 + tps->curr_vset_id, &data); | |
131 | if (ret < 0) { | |
2935fb18 LD |
132 | dev_err(tps->dev, "%s(): register %d read failed with err %d\n", |
133 | __func__, REG_VSET0 + tps->curr_vset_id, ret); | |
6219929f LD |
134 | return ret; |
135 | } | |
136 | vsel = (int)data & tps->voltage_reg_mask; | |
a60cfce0 | 137 | return vsel; |
6219929f LD |
138 | } |
139 | ||
140 | static int tps62360_dcdc_set_voltage(struct regulator_dev *dev, | |
141 | int min_uV, int max_uV, unsigned *selector) | |
142 | { | |
143 | struct tps62360_chip *tps = rdev_get_drvdata(dev); | |
144 | int vsel; | |
145 | int ret; | |
146 | bool found = false; | |
147 | int new_vset_id = tps->curr_vset_id; | |
148 | ||
2935fb18 | 149 | if ((max_uV < min_uV) || (max_uV < tps->voltage_base)) |
6219929f LD |
150 | return -EINVAL; |
151 | ||
2935fb18 | 152 | if (min_uV > (tps->voltage_base + (tps->desc.n_voltages - 1) * 10000)) |
6219929f LD |
153 | return -EINVAL; |
154 | ||
2935fb18 | 155 | vsel = DIV_ROUND_UP(min_uV - tps->voltage_base, 10000); |
6219929f LD |
156 | if (selector) |
157 | *selector = (vsel & tps->voltage_reg_mask); | |
158 | ||
159 | /* | |
160 | * If gpios are available to select the VSET register then least | |
161 | * recently used register for new configuration. | |
162 | */ | |
163 | if (tps->valid_gpios) | |
164 | found = find_voltage_set_register(tps, vsel, &new_vset_id); | |
165 | ||
166 | if (!found) { | |
167 | ret = regmap_update_bits(tps->regmap, REG_VSET0 + new_vset_id, | |
168 | tps->voltage_reg_mask, vsel); | |
169 | if (ret < 0) { | |
2935fb18 LD |
170 | dev_err(tps->dev, |
171 | "%s(): register %d update failed with err %d\n", | |
172 | __func__, REG_VSET0 + new_vset_id, ret); | |
6219929f LD |
173 | return ret; |
174 | } | |
175 | tps->curr_vset_id = new_vset_id; | |
176 | tps->curr_vset_vsel[new_vset_id] = vsel; | |
177 | } | |
178 | ||
179 | /* Select proper VSET register vio gpios */ | |
180 | if (tps->valid_gpios) { | |
2935fb18 | 181 | gpio_set_value_cansleep(tps->vsel0_gpio, new_vset_id & 0x1); |
6219929f LD |
182 | gpio_set_value_cansleep(tps->vsel1_gpio, |
183 | (new_vset_id >> 1) & 0x1); | |
184 | } | |
185 | return 0; | |
186 | } | |
187 | ||
a60cfce0 LD |
188 | static int tps62360_set_voltage_time_sel(struct regulator_dev *rdev, |
189 | unsigned int old_selector, unsigned int new_selector) | |
190 | { | |
191 | struct tps62360_chip *tps = rdev_get_drvdata(rdev); | |
192 | int old_uV, new_uV; | |
193 | ||
7f225ba5 | 194 | old_uV = regulator_list_voltage_linear(rdev, old_selector); |
a60cfce0 LD |
195 | if (old_uV < 0) |
196 | return old_uV; | |
197 | ||
7f225ba5 | 198 | new_uV = regulator_list_voltage_linear(rdev, new_selector); |
a60cfce0 LD |
199 | if (new_uV < 0) |
200 | return new_uV; | |
201 | ||
202 | return DIV_ROUND_UP(abs(old_uV - new_uV), tps->change_uv_per_us); | |
203 | } | |
204 | ||
6219929f | 205 | static struct regulator_ops tps62360_dcdc_ops = { |
a60cfce0 LD |
206 | .get_voltage_sel = tps62360_dcdc_get_voltage_sel, |
207 | .set_voltage = tps62360_dcdc_set_voltage, | |
7f225ba5 | 208 | .list_voltage = regulator_list_voltage_linear, |
a60cfce0 | 209 | .set_voltage_time_sel = tps62360_set_voltage_time_sel, |
6219929f LD |
210 | }; |
211 | ||
2935fb18 | 212 | static int __devinit tps62360_init_force_pwm(struct tps62360_chip *tps, |
6219929f LD |
213 | struct tps62360_regulator_platform_data *pdata, |
214 | int vset_id) | |
215 | { | |
6219929f | 216 | int ret; |
2935fb18 LD |
217 | int bit = 0; |
218 | ||
6219929f | 219 | if (pdata->en_force_pwm) |
2935fb18 LD |
220 | bit = BIT(7); |
221 | ||
222 | ret = regmap_update_bits(tps->regmap, REG_VSET0 + vset_id, BIT(7), bit); | |
6219929f | 223 | if (ret < 0) |
2935fb18 LD |
224 | dev_err(tps->dev, |
225 | "%s(): register %d update failed with err %d\n", | |
226 | __func__, REG_VSET0 + vset_id, ret); | |
6219929f LD |
227 | return ret; |
228 | } | |
229 | ||
2935fb18 | 230 | static int __devinit tps62360_init_dcdc(struct tps62360_chip *tps, |
6219929f LD |
231 | struct tps62360_regulator_platform_data *pdata) |
232 | { | |
233 | int ret; | |
234 | int i; | |
a60cfce0 | 235 | unsigned int ramp_ctrl; |
6219929f | 236 | |
2935fb18 | 237 | /* Initialize internal pull up/down control */ |
6219929f LD |
238 | if (tps->en_internal_pulldn) |
239 | ret = regmap_write(tps->regmap, REG_CONTROL, 0xE0); | |
240 | else | |
241 | ret = regmap_write(tps->regmap, REG_CONTROL, 0x0); | |
242 | if (ret < 0) { | |
2935fb18 LD |
243 | dev_err(tps->dev, |
244 | "%s(): register %d write failed with err %d\n", | |
245 | __func__, REG_CONTROL, ret); | |
6219929f LD |
246 | return ret; |
247 | } | |
248 | ||
2935fb18 | 249 | /* Initialize force PWM mode */ |
6219929f LD |
250 | if (tps->valid_gpios) { |
251 | for (i = 0; i < 4; ++i) { | |
252 | ret = tps62360_init_force_pwm(tps, pdata, i); | |
253 | if (ret < 0) | |
254 | return ret; | |
255 | } | |
256 | } else { | |
257 | ret = tps62360_init_force_pwm(tps, pdata, tps->curr_vset_id); | |
258 | if (ret < 0) | |
259 | return ret; | |
260 | } | |
261 | ||
262 | /* Reset output discharge path to reduce power consumption */ | |
263 | ret = regmap_update_bits(tps->regmap, REG_RAMPCTRL, BIT(2), 0); | |
a60cfce0 | 264 | if (ret < 0) { |
2935fb18 LD |
265 | dev_err(tps->dev, |
266 | "%s(): register %d update failed with err %d\n", | |
267 | __func__, REG_RAMPCTRL, ret); | |
a60cfce0 LD |
268 | return ret; |
269 | } | |
270 | ||
271 | /* Get ramp value from ramp control register */ | |
272 | ret = regmap_read(tps->regmap, REG_RAMPCTRL, &ramp_ctrl); | |
273 | if (ret < 0) { | |
2935fb18 LD |
274 | dev_err(tps->dev, |
275 | "%s(): register %d read failed with err %d\n", | |
276 | __func__, REG_RAMPCTRL, ret); | |
a60cfce0 LD |
277 | return ret; |
278 | } | |
279 | ramp_ctrl = (ramp_ctrl >> 4) & 0x7; | |
280 | ||
281 | /* ramp mV/us = 32/(2^ramp_ctrl) */ | |
282 | tps->change_uv_per_us = DIV_ROUND_UP(32000, BIT(ramp_ctrl)); | |
6219929f LD |
283 | return ret; |
284 | } | |
285 | ||
286 | static const struct regmap_config tps62360_regmap_config = { | |
16ea003b LD |
287 | .reg_bits = 8, |
288 | .val_bits = 8, | |
289 | .max_register = REG_CHIPID, | |
290 | .cache_type = REGCACHE_RBTREE, | |
6219929f LD |
291 | }; |
292 | ||
684ae39b LD |
293 | static struct tps62360_regulator_platform_data * |
294 | of_get_tps62360_platform_data(struct device *dev) | |
295 | { | |
296 | struct tps62360_regulator_platform_data *pdata; | |
297 | struct device_node *np = dev->of_node; | |
298 | ||
299 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
300 | if (!pdata) { | |
301 | dev_err(dev, "Memory alloc failed for platform data\n"); | |
302 | return NULL; | |
303 | } | |
304 | ||
305 | pdata->reg_init_data = of_get_regulator_init_data(dev, dev->of_node); | |
306 | if (!pdata->reg_init_data) { | |
307 | dev_err(dev, "Not able to get OF regulator init data\n"); | |
308 | return NULL; | |
309 | } | |
310 | ||
311 | pdata->vsel0_gpio = of_get_named_gpio(np, "vsel0-gpio", 0); | |
312 | pdata->vsel1_gpio = of_get_named_gpio(np, "vsel1-gpio", 0); | |
313 | ||
314 | if (of_find_property(np, "ti,vsel0-state-high", NULL)) | |
315 | pdata->vsel0_def_state = 1; | |
316 | ||
317 | if (of_find_property(np, "ti,vsel1-state-high", NULL)) | |
318 | pdata->vsel1_def_state = 1; | |
319 | ||
320 | if (of_find_property(np, "ti,enable-pull-down", NULL)) | |
321 | pdata->en_internal_pulldn = true; | |
322 | ||
323 | if (of_find_property(np, "ti,enable-force-pwm", NULL)) | |
324 | pdata->en_force_pwm = true; | |
325 | ||
326 | if (of_find_property(np, "ti,enable-vout-discharge", NULL)) | |
327 | pdata->en_discharge = true; | |
328 | ||
329 | return pdata; | |
330 | } | |
331 | ||
332 | #if defined(CONFIG_OF) | |
333 | static const struct of_device_id tps62360_of_match[] = { | |
334 | { .compatible = "ti,tps62360", .data = (void *)TPS62360}, | |
335 | { .compatible = "ti,tps62361", .data = (void *)TPS62361}, | |
336 | { .compatible = "ti,tps62362", .data = (void *)TPS62362}, | |
337 | { .compatible = "ti,tps62363", .data = (void *)TPS62363}, | |
338 | {}, | |
339 | } | |
340 | MODULE_DEVICE_TABLE(of, tps62360_of_match); | |
341 | #endif | |
342 | ||
6219929f LD |
343 | static int __devinit tps62360_probe(struct i2c_client *client, |
344 | const struct i2c_device_id *id) | |
345 | { | |
c172708d | 346 | struct regulator_config config = { }; |
6219929f LD |
347 | struct tps62360_regulator_platform_data *pdata; |
348 | struct regulator_dev *rdev; | |
349 | struct tps62360_chip *tps; | |
350 | int ret; | |
351 | int i; | |
684ae39b | 352 | int chip_id; |
6219929f LD |
353 | |
354 | pdata = client->dev.platform_data; | |
684ae39b LD |
355 | chip_id = id->driver_data; |
356 | ||
357 | if (client->dev.of_node) { | |
358 | const struct of_device_id *match; | |
359 | match = of_match_device(of_match_ptr(tps62360_of_match), | |
360 | &client->dev); | |
361 | if (!match) { | |
362 | dev_err(&client->dev, "Error: No device match found\n"); | |
363 | return -ENODEV; | |
364 | } | |
365 | chip_id = (int)match->data; | |
366 | if (!pdata) | |
367 | pdata = of_get_tps62360_platform_data(&client->dev); | |
368 | } | |
369 | ||
6219929f | 370 | if (!pdata) { |
2935fb18 | 371 | dev_err(&client->dev, "%s(): Platform data not found\n", |
6219929f LD |
372 | __func__); |
373 | return -EIO; | |
374 | } | |
375 | ||
376 | tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); | |
377 | if (!tps) { | |
2935fb18 | 378 | dev_err(&client->dev, "%s(): Memory allocation failed\n", |
6219929f LD |
379 | __func__); |
380 | return -ENOMEM; | |
381 | } | |
382 | ||
383 | tps->en_force_pwm = pdata->en_force_pwm; | |
384 | tps->en_discharge = pdata->en_discharge; | |
385 | tps->en_internal_pulldn = pdata->en_internal_pulldn; | |
386 | tps->vsel0_gpio = pdata->vsel0_gpio; | |
387 | tps->vsel1_gpio = pdata->vsel1_gpio; | |
6219929f | 388 | tps->dev = &client->dev; |
d1cf4f65 | 389 | |
684ae39b | 390 | switch (chip_id) { |
d1cf4f65 AL |
391 | case TPS62360: |
392 | case TPS62362: | |
393 | tps->voltage_base = TPS62360_BASE_VOLTAGE; | |
394 | tps->voltage_reg_mask = 0x3F; | |
395 | tps->desc.n_voltages = TPS62360_N_VOLTAGES; | |
396 | break; | |
397 | case TPS62361: | |
398 | case TPS62363: | |
399 | tps->voltage_base = TPS62361_BASE_VOLTAGE; | |
400 | tps->voltage_reg_mask = 0x7F; | |
401 | tps->desc.n_voltages = TPS62361_N_VOLTAGES; | |
402 | break; | |
403 | default: | |
404 | return -ENODEV; | |
405 | } | |
6219929f LD |
406 | |
407 | tps->desc.name = id->name; | |
408 | tps->desc.id = 0; | |
6219929f LD |
409 | tps->desc.ops = &tps62360_dcdc_ops; |
410 | tps->desc.type = REGULATOR_VOLTAGE; | |
411 | tps->desc.owner = THIS_MODULE; | |
7f225ba5 AL |
412 | tps->desc.min_uV = tps->voltage_base; |
413 | tps->desc.uV_step = 10000; | |
414 | ||
9a4bdd87 | 415 | tps->regmap = devm_regmap_init_i2c(client, &tps62360_regmap_config); |
6219929f LD |
416 | if (IS_ERR(tps->regmap)) { |
417 | ret = PTR_ERR(tps->regmap); | |
2935fb18 LD |
418 | dev_err(&client->dev, |
419 | "%s(): regmap allocation failed with err %d\n", | |
420 | __func__, ret); | |
6219929f LD |
421 | return ret; |
422 | } | |
423 | i2c_set_clientdata(client, tps); | |
424 | ||
425 | tps->curr_vset_id = (pdata->vsel1_def_state & 1) * 2 + | |
426 | (pdata->vsel0_def_state & 1); | |
427 | tps->lru_index[0] = tps->curr_vset_id; | |
428 | tps->valid_gpios = false; | |
429 | ||
430 | if (gpio_is_valid(tps->vsel0_gpio) && gpio_is_valid(tps->vsel1_gpio)) { | |
2935fb18 LD |
431 | int gpio_flags; |
432 | gpio_flags = (pdata->vsel0_def_state) ? | |
433 | GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW; | |
434 | ret = gpio_request_one(tps->vsel0_gpio, | |
435 | gpio_flags, "tps62360-vsel0"); | |
6219929f LD |
436 | if (ret) { |
437 | dev_err(&client->dev, | |
2935fb18 LD |
438 | "%s(): Could not obtain vsel0 GPIO %d: %d\n", |
439 | __func__, tps->vsel0_gpio, ret); | |
6219929f LD |
440 | goto err_gpio0; |
441 | } | |
442 | ||
2935fb18 LD |
443 | gpio_flags = (pdata->vsel1_def_state) ? |
444 | GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW; | |
445 | ret = gpio_request_one(tps->vsel1_gpio, | |
446 | gpio_flags, "tps62360-vsel1"); | |
6219929f LD |
447 | if (ret) { |
448 | dev_err(&client->dev, | |
2935fb18 LD |
449 | "%s(): Could not obtain vsel1 GPIO %d: %d\n", |
450 | __func__, tps->vsel1_gpio, ret); | |
6219929f LD |
451 | goto err_gpio1; |
452 | } | |
453 | tps->valid_gpios = true; | |
454 | ||
455 | /* | |
456 | * Initialize the lru index with vset_reg id | |
457 | * The index 0 will be most recently used and | |
458 | * set with the tps->curr_vset_id */ | |
459 | for (i = 0; i < 4; ++i) | |
460 | tps->lru_index[i] = i; | |
461 | tps->lru_index[0] = tps->curr_vset_id; | |
462 | tps->lru_index[tps->curr_vset_id] = 0; | |
463 | } | |
464 | ||
465 | ret = tps62360_init_dcdc(tps, pdata); | |
466 | if (ret < 0) { | |
2935fb18 | 467 | dev_err(tps->dev, "%s(): Init failed with err = %d\n", |
6219929f LD |
468 | __func__, ret); |
469 | goto err_init; | |
470 | } | |
471 | ||
c172708d | 472 | config.dev = &client->dev; |
8bdca009 | 473 | config.init_data = pdata->reg_init_data; |
c172708d MB |
474 | config.driver_data = tps; |
475 | ||
6219929f | 476 | /* Register the regulators */ |
c172708d | 477 | rdev = regulator_register(&tps->desc, &config); |
6219929f | 478 | if (IS_ERR(rdev)) { |
2935fb18 LD |
479 | dev_err(tps->dev, |
480 | "%s(): regulator register failed with err %s\n", | |
481 | __func__, id->name); | |
6219929f LD |
482 | ret = PTR_ERR(rdev); |
483 | goto err_init; | |
484 | } | |
485 | ||
486 | tps->rdev = rdev; | |
487 | return 0; | |
488 | ||
489 | err_init: | |
490 | if (gpio_is_valid(tps->vsel1_gpio)) | |
491 | gpio_free(tps->vsel1_gpio); | |
492 | err_gpio1: | |
493 | if (gpio_is_valid(tps->vsel0_gpio)) | |
494 | gpio_free(tps->vsel0_gpio); | |
495 | err_gpio0: | |
6219929f LD |
496 | return ret; |
497 | } | |
498 | ||
499 | /** | |
500 | * tps62360_remove - tps62360 driver i2c remove handler | |
501 | * @client: i2c driver client device structure | |
502 | * | |
503 | * Unregister TPS driver as an i2c client device driver | |
504 | */ | |
505 | static int __devexit tps62360_remove(struct i2c_client *client) | |
506 | { | |
507 | struct tps62360_chip *tps = i2c_get_clientdata(client); | |
508 | ||
509 | if (gpio_is_valid(tps->vsel1_gpio)) | |
510 | gpio_free(tps->vsel1_gpio); | |
511 | ||
512 | if (gpio_is_valid(tps->vsel0_gpio)) | |
513 | gpio_free(tps->vsel0_gpio); | |
514 | ||
515 | regulator_unregister(tps->rdev); | |
6219929f LD |
516 | return 0; |
517 | } | |
518 | ||
519 | static void tps62360_shutdown(struct i2c_client *client) | |
520 | { | |
521 | struct tps62360_chip *tps = i2c_get_clientdata(client); | |
522 | int st; | |
523 | ||
524 | if (!tps->en_discharge) | |
525 | return; | |
526 | ||
527 | /* Configure the output discharge path */ | |
528 | st = regmap_update_bits(tps->regmap, REG_RAMPCTRL, BIT(2), BIT(2)); | |
529 | if (st < 0) | |
2935fb18 LD |
530 | dev_err(tps->dev, |
531 | "%s(): register %d update failed with err %d\n", | |
532 | __func__, REG_RAMPCTRL, st); | |
6219929f LD |
533 | } |
534 | ||
535 | static const struct i2c_device_id tps62360_id[] = { | |
536 | {.name = "tps62360", .driver_data = TPS62360}, | |
537 | {.name = "tps62361", .driver_data = TPS62361}, | |
d1cf4f65 AL |
538 | {.name = "tps62362", .driver_data = TPS62362}, |
539 | {.name = "tps62363", .driver_data = TPS62363}, | |
6219929f LD |
540 | {}, |
541 | }; | |
542 | ||
543 | MODULE_DEVICE_TABLE(i2c, tps62360_id); | |
544 | ||
545 | static struct i2c_driver tps62360_i2c_driver = { | |
546 | .driver = { | |
547 | .name = "tps62360", | |
548 | .owner = THIS_MODULE, | |
684ae39b | 549 | .of_match_table = of_match_ptr(tps62360_of_match), |
6219929f LD |
550 | }, |
551 | .probe = tps62360_probe, | |
552 | .remove = __devexit_p(tps62360_remove), | |
553 | .shutdown = tps62360_shutdown, | |
554 | .id_table = tps62360_id, | |
555 | }; | |
556 | ||
557 | static int __init tps62360_init(void) | |
558 | { | |
559 | return i2c_add_driver(&tps62360_i2c_driver); | |
560 | } | |
561 | subsys_initcall(tps62360_init); | |
562 | ||
563 | static void __exit tps62360_cleanup(void) | |
564 | { | |
565 | i2c_del_driver(&tps62360_i2c_driver); | |
566 | } | |
567 | module_exit(tps62360_cleanup); | |
568 | ||
569 | MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); | |
d1cf4f65 | 570 | MODULE_DESCRIPTION("TPS6236x voltage regulator driver"); |
6219929f | 571 | MODULE_LICENSE("GPL v2"); |