]>
Commit | Line | Data |
---|---|---|
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 | ||
41097afd AL |
140 | static int tps62360_dcdc_set_voltage_sel(struct regulator_dev *dev, |
141 | unsigned selector) | |
6219929f LD |
142 | { |
143 | struct tps62360_chip *tps = rdev_get_drvdata(dev); | |
6219929f LD |
144 | int ret; |
145 | bool found = false; | |
146 | int new_vset_id = tps->curr_vset_id; | |
147 | ||
6219929f LD |
148 | /* |
149 | * If gpios are available to select the VSET register then least | |
150 | * recently used register for new configuration. | |
151 | */ | |
152 | if (tps->valid_gpios) | |
41097afd | 153 | found = find_voltage_set_register(tps, selector, &new_vset_id); |
6219929f LD |
154 | |
155 | if (!found) { | |
156 | ret = regmap_update_bits(tps->regmap, REG_VSET0 + new_vset_id, | |
41097afd | 157 | tps->voltage_reg_mask, selector); |
6219929f | 158 | if (ret < 0) { |
2935fb18 LD |
159 | dev_err(tps->dev, |
160 | "%s(): register %d update failed with err %d\n", | |
161 | __func__, REG_VSET0 + new_vset_id, ret); | |
6219929f LD |
162 | return ret; |
163 | } | |
164 | tps->curr_vset_id = new_vset_id; | |
41097afd | 165 | tps->curr_vset_vsel[new_vset_id] = selector; |
6219929f LD |
166 | } |
167 | ||
168 | /* Select proper VSET register vio gpios */ | |
169 | if (tps->valid_gpios) { | |
2935fb18 | 170 | gpio_set_value_cansleep(tps->vsel0_gpio, new_vset_id & 0x1); |
6219929f LD |
171 | gpio_set_value_cansleep(tps->vsel1_gpio, |
172 | (new_vset_id >> 1) & 0x1); | |
173 | } | |
174 | return 0; | |
175 | } | |
176 | ||
a60cfce0 LD |
177 | static int tps62360_set_voltage_time_sel(struct regulator_dev *rdev, |
178 | unsigned int old_selector, unsigned int new_selector) | |
179 | { | |
180 | struct tps62360_chip *tps = rdev_get_drvdata(rdev); | |
181 | int old_uV, new_uV; | |
182 | ||
7f225ba5 | 183 | old_uV = regulator_list_voltage_linear(rdev, old_selector); |
a60cfce0 LD |
184 | if (old_uV < 0) |
185 | return old_uV; | |
186 | ||
7f225ba5 | 187 | new_uV = regulator_list_voltage_linear(rdev, new_selector); |
a60cfce0 LD |
188 | if (new_uV < 0) |
189 | return new_uV; | |
190 | ||
191 | return DIV_ROUND_UP(abs(old_uV - new_uV), tps->change_uv_per_us); | |
192 | } | |
193 | ||
6219929f | 194 | static struct regulator_ops tps62360_dcdc_ops = { |
a60cfce0 | 195 | .get_voltage_sel = tps62360_dcdc_get_voltage_sel, |
41097afd | 196 | .set_voltage_sel = tps62360_dcdc_set_voltage_sel, |
7f225ba5 | 197 | .list_voltage = regulator_list_voltage_linear, |
41097afd | 198 | .map_voltage = regulator_map_voltage_linear, |
a60cfce0 | 199 | .set_voltage_time_sel = tps62360_set_voltage_time_sel, |
6219929f LD |
200 | }; |
201 | ||
2935fb18 | 202 | static int __devinit tps62360_init_force_pwm(struct tps62360_chip *tps, |
6219929f LD |
203 | struct tps62360_regulator_platform_data *pdata, |
204 | int vset_id) | |
205 | { | |
6219929f | 206 | int ret; |
2935fb18 LD |
207 | int bit = 0; |
208 | ||
6219929f | 209 | if (pdata->en_force_pwm) |
2935fb18 LD |
210 | bit = BIT(7); |
211 | ||
212 | ret = regmap_update_bits(tps->regmap, REG_VSET0 + vset_id, BIT(7), bit); | |
6219929f | 213 | if (ret < 0) |
2935fb18 LD |
214 | dev_err(tps->dev, |
215 | "%s(): register %d update failed with err %d\n", | |
216 | __func__, REG_VSET0 + vset_id, ret); | |
6219929f LD |
217 | return ret; |
218 | } | |
219 | ||
2935fb18 | 220 | static int __devinit tps62360_init_dcdc(struct tps62360_chip *tps, |
6219929f LD |
221 | struct tps62360_regulator_platform_data *pdata) |
222 | { | |
223 | int ret; | |
224 | int i; | |
a60cfce0 | 225 | unsigned int ramp_ctrl; |
6219929f | 226 | |
2935fb18 | 227 | /* Initialize internal pull up/down control */ |
6219929f LD |
228 | if (tps->en_internal_pulldn) |
229 | ret = regmap_write(tps->regmap, REG_CONTROL, 0xE0); | |
230 | else | |
231 | ret = regmap_write(tps->regmap, REG_CONTROL, 0x0); | |
232 | if (ret < 0) { | |
2935fb18 LD |
233 | dev_err(tps->dev, |
234 | "%s(): register %d write failed with err %d\n", | |
235 | __func__, REG_CONTROL, ret); | |
6219929f LD |
236 | return ret; |
237 | } | |
238 | ||
2935fb18 | 239 | /* Initialize force PWM mode */ |
6219929f LD |
240 | if (tps->valid_gpios) { |
241 | for (i = 0; i < 4; ++i) { | |
242 | ret = tps62360_init_force_pwm(tps, pdata, i); | |
243 | if (ret < 0) | |
244 | return ret; | |
245 | } | |
246 | } else { | |
247 | ret = tps62360_init_force_pwm(tps, pdata, tps->curr_vset_id); | |
248 | if (ret < 0) | |
249 | return ret; | |
250 | } | |
251 | ||
252 | /* Reset output discharge path to reduce power consumption */ | |
253 | ret = regmap_update_bits(tps->regmap, REG_RAMPCTRL, BIT(2), 0); | |
a60cfce0 | 254 | if (ret < 0) { |
2935fb18 LD |
255 | dev_err(tps->dev, |
256 | "%s(): register %d update failed with err %d\n", | |
257 | __func__, REG_RAMPCTRL, ret); | |
a60cfce0 LD |
258 | return ret; |
259 | } | |
260 | ||
261 | /* Get ramp value from ramp control register */ | |
262 | ret = regmap_read(tps->regmap, REG_RAMPCTRL, &ramp_ctrl); | |
263 | if (ret < 0) { | |
2935fb18 LD |
264 | dev_err(tps->dev, |
265 | "%s(): register %d read failed with err %d\n", | |
266 | __func__, REG_RAMPCTRL, ret); | |
a60cfce0 LD |
267 | return ret; |
268 | } | |
269 | ramp_ctrl = (ramp_ctrl >> 4) & 0x7; | |
270 | ||
271 | /* ramp mV/us = 32/(2^ramp_ctrl) */ | |
272 | tps->change_uv_per_us = DIV_ROUND_UP(32000, BIT(ramp_ctrl)); | |
6219929f LD |
273 | return ret; |
274 | } | |
275 | ||
276 | static const struct regmap_config tps62360_regmap_config = { | |
16ea003b LD |
277 | .reg_bits = 8, |
278 | .val_bits = 8, | |
279 | .max_register = REG_CHIPID, | |
280 | .cache_type = REGCACHE_RBTREE, | |
6219929f LD |
281 | }; |
282 | ||
684ae39b LD |
283 | static struct tps62360_regulator_platform_data * |
284 | of_get_tps62360_platform_data(struct device *dev) | |
285 | { | |
286 | struct tps62360_regulator_platform_data *pdata; | |
287 | struct device_node *np = dev->of_node; | |
288 | ||
289 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
290 | if (!pdata) { | |
291 | dev_err(dev, "Memory alloc failed for platform data\n"); | |
292 | return NULL; | |
293 | } | |
294 | ||
295 | pdata->reg_init_data = of_get_regulator_init_data(dev, dev->of_node); | |
296 | if (!pdata->reg_init_data) { | |
297 | dev_err(dev, "Not able to get OF regulator init data\n"); | |
298 | return NULL; | |
299 | } | |
300 | ||
301 | pdata->vsel0_gpio = of_get_named_gpio(np, "vsel0-gpio", 0); | |
302 | pdata->vsel1_gpio = of_get_named_gpio(np, "vsel1-gpio", 0); | |
303 | ||
304 | if (of_find_property(np, "ti,vsel0-state-high", NULL)) | |
305 | pdata->vsel0_def_state = 1; | |
306 | ||
307 | if (of_find_property(np, "ti,vsel1-state-high", NULL)) | |
308 | pdata->vsel1_def_state = 1; | |
309 | ||
310 | if (of_find_property(np, "ti,enable-pull-down", NULL)) | |
311 | pdata->en_internal_pulldn = true; | |
312 | ||
313 | if (of_find_property(np, "ti,enable-force-pwm", NULL)) | |
314 | pdata->en_force_pwm = true; | |
315 | ||
316 | if (of_find_property(np, "ti,enable-vout-discharge", NULL)) | |
317 | pdata->en_discharge = true; | |
318 | ||
319 | return pdata; | |
320 | } | |
321 | ||
322 | #if defined(CONFIG_OF) | |
323 | static const struct of_device_id tps62360_of_match[] = { | |
324 | { .compatible = "ti,tps62360", .data = (void *)TPS62360}, | |
325 | { .compatible = "ti,tps62361", .data = (void *)TPS62361}, | |
326 | { .compatible = "ti,tps62362", .data = (void *)TPS62362}, | |
327 | { .compatible = "ti,tps62363", .data = (void *)TPS62363}, | |
328 | {}, | |
329 | } | |
330 | MODULE_DEVICE_TABLE(of, tps62360_of_match); | |
331 | #endif | |
332 | ||
6219929f LD |
333 | static int __devinit tps62360_probe(struct i2c_client *client, |
334 | const struct i2c_device_id *id) | |
335 | { | |
c172708d | 336 | struct regulator_config config = { }; |
6219929f LD |
337 | struct tps62360_regulator_platform_data *pdata; |
338 | struct regulator_dev *rdev; | |
339 | struct tps62360_chip *tps; | |
340 | int ret; | |
341 | int i; | |
684ae39b | 342 | int chip_id; |
6219929f LD |
343 | |
344 | pdata = client->dev.platform_data; | |
684ae39b LD |
345 | chip_id = id->driver_data; |
346 | ||
347 | if (client->dev.of_node) { | |
348 | const struct of_device_id *match; | |
349 | match = of_match_device(of_match_ptr(tps62360_of_match), | |
350 | &client->dev); | |
351 | if (!match) { | |
352 | dev_err(&client->dev, "Error: No device match found\n"); | |
353 | return -ENODEV; | |
354 | } | |
355 | chip_id = (int)match->data; | |
356 | if (!pdata) | |
357 | pdata = of_get_tps62360_platform_data(&client->dev); | |
358 | } | |
359 | ||
6219929f | 360 | if (!pdata) { |
2935fb18 | 361 | dev_err(&client->dev, "%s(): Platform data not found\n", |
6219929f LD |
362 | __func__); |
363 | return -EIO; | |
364 | } | |
365 | ||
366 | tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); | |
367 | if (!tps) { | |
2935fb18 | 368 | dev_err(&client->dev, "%s(): Memory allocation failed\n", |
6219929f LD |
369 | __func__); |
370 | return -ENOMEM; | |
371 | } | |
372 | ||
373 | tps->en_force_pwm = pdata->en_force_pwm; | |
374 | tps->en_discharge = pdata->en_discharge; | |
375 | tps->en_internal_pulldn = pdata->en_internal_pulldn; | |
376 | tps->vsel0_gpio = pdata->vsel0_gpio; | |
377 | tps->vsel1_gpio = pdata->vsel1_gpio; | |
6219929f | 378 | tps->dev = &client->dev; |
d1cf4f65 | 379 | |
684ae39b | 380 | switch (chip_id) { |
d1cf4f65 AL |
381 | case TPS62360: |
382 | case TPS62362: | |
383 | tps->voltage_base = TPS62360_BASE_VOLTAGE; | |
384 | tps->voltage_reg_mask = 0x3F; | |
385 | tps->desc.n_voltages = TPS62360_N_VOLTAGES; | |
386 | break; | |
387 | case TPS62361: | |
388 | case TPS62363: | |
389 | tps->voltage_base = TPS62361_BASE_VOLTAGE; | |
390 | tps->voltage_reg_mask = 0x7F; | |
391 | tps->desc.n_voltages = TPS62361_N_VOLTAGES; | |
392 | break; | |
393 | default: | |
394 | return -ENODEV; | |
395 | } | |
6219929f LD |
396 | |
397 | tps->desc.name = id->name; | |
398 | tps->desc.id = 0; | |
6219929f LD |
399 | tps->desc.ops = &tps62360_dcdc_ops; |
400 | tps->desc.type = REGULATOR_VOLTAGE; | |
401 | tps->desc.owner = THIS_MODULE; | |
7f225ba5 AL |
402 | tps->desc.min_uV = tps->voltage_base; |
403 | tps->desc.uV_step = 10000; | |
404 | ||
9a4bdd87 | 405 | tps->regmap = devm_regmap_init_i2c(client, &tps62360_regmap_config); |
6219929f LD |
406 | if (IS_ERR(tps->regmap)) { |
407 | ret = PTR_ERR(tps->regmap); | |
2935fb18 LD |
408 | dev_err(&client->dev, |
409 | "%s(): regmap allocation failed with err %d\n", | |
410 | __func__, ret); | |
6219929f LD |
411 | return ret; |
412 | } | |
413 | i2c_set_clientdata(client, tps); | |
414 | ||
415 | tps->curr_vset_id = (pdata->vsel1_def_state & 1) * 2 + | |
416 | (pdata->vsel0_def_state & 1); | |
417 | tps->lru_index[0] = tps->curr_vset_id; | |
418 | tps->valid_gpios = false; | |
419 | ||
420 | if (gpio_is_valid(tps->vsel0_gpio) && gpio_is_valid(tps->vsel1_gpio)) { | |
2935fb18 LD |
421 | int gpio_flags; |
422 | gpio_flags = (pdata->vsel0_def_state) ? | |
423 | GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW; | |
424 | ret = gpio_request_one(tps->vsel0_gpio, | |
425 | gpio_flags, "tps62360-vsel0"); | |
6219929f LD |
426 | if (ret) { |
427 | dev_err(&client->dev, | |
2935fb18 LD |
428 | "%s(): Could not obtain vsel0 GPIO %d: %d\n", |
429 | __func__, tps->vsel0_gpio, ret); | |
6219929f LD |
430 | goto err_gpio0; |
431 | } | |
432 | ||
2935fb18 LD |
433 | gpio_flags = (pdata->vsel1_def_state) ? |
434 | GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW; | |
435 | ret = gpio_request_one(tps->vsel1_gpio, | |
436 | gpio_flags, "tps62360-vsel1"); | |
6219929f LD |
437 | if (ret) { |
438 | dev_err(&client->dev, | |
2935fb18 LD |
439 | "%s(): Could not obtain vsel1 GPIO %d: %d\n", |
440 | __func__, tps->vsel1_gpio, ret); | |
6219929f LD |
441 | goto err_gpio1; |
442 | } | |
443 | tps->valid_gpios = true; | |
444 | ||
445 | /* | |
446 | * Initialize the lru index with vset_reg id | |
447 | * The index 0 will be most recently used and | |
448 | * set with the tps->curr_vset_id */ | |
449 | for (i = 0; i < 4; ++i) | |
450 | tps->lru_index[i] = i; | |
451 | tps->lru_index[0] = tps->curr_vset_id; | |
452 | tps->lru_index[tps->curr_vset_id] = 0; | |
453 | } | |
454 | ||
455 | ret = tps62360_init_dcdc(tps, pdata); | |
456 | if (ret < 0) { | |
2935fb18 | 457 | dev_err(tps->dev, "%s(): Init failed with err = %d\n", |
6219929f LD |
458 | __func__, ret); |
459 | goto err_init; | |
460 | } | |
461 | ||
c172708d | 462 | config.dev = &client->dev; |
8bdca009 | 463 | config.init_data = pdata->reg_init_data; |
c172708d MB |
464 | config.driver_data = tps; |
465 | ||
6219929f | 466 | /* Register the regulators */ |
c172708d | 467 | rdev = regulator_register(&tps->desc, &config); |
6219929f | 468 | if (IS_ERR(rdev)) { |
2935fb18 LD |
469 | dev_err(tps->dev, |
470 | "%s(): regulator register failed with err %s\n", | |
471 | __func__, id->name); | |
6219929f LD |
472 | ret = PTR_ERR(rdev); |
473 | goto err_init; | |
474 | } | |
475 | ||
476 | tps->rdev = rdev; | |
477 | return 0; | |
478 | ||
479 | err_init: | |
480 | if (gpio_is_valid(tps->vsel1_gpio)) | |
481 | gpio_free(tps->vsel1_gpio); | |
482 | err_gpio1: | |
483 | if (gpio_is_valid(tps->vsel0_gpio)) | |
484 | gpio_free(tps->vsel0_gpio); | |
485 | err_gpio0: | |
6219929f LD |
486 | return ret; |
487 | } | |
488 | ||
489 | /** | |
490 | * tps62360_remove - tps62360 driver i2c remove handler | |
491 | * @client: i2c driver client device structure | |
492 | * | |
493 | * Unregister TPS driver as an i2c client device driver | |
494 | */ | |
495 | static int __devexit tps62360_remove(struct i2c_client *client) | |
496 | { | |
497 | struct tps62360_chip *tps = i2c_get_clientdata(client); | |
498 | ||
499 | if (gpio_is_valid(tps->vsel1_gpio)) | |
500 | gpio_free(tps->vsel1_gpio); | |
501 | ||
502 | if (gpio_is_valid(tps->vsel0_gpio)) | |
503 | gpio_free(tps->vsel0_gpio); | |
504 | ||
505 | regulator_unregister(tps->rdev); | |
6219929f LD |
506 | return 0; |
507 | } | |
508 | ||
509 | static void tps62360_shutdown(struct i2c_client *client) | |
510 | { | |
511 | struct tps62360_chip *tps = i2c_get_clientdata(client); | |
512 | int st; | |
513 | ||
514 | if (!tps->en_discharge) | |
515 | return; | |
516 | ||
517 | /* Configure the output discharge path */ | |
518 | st = regmap_update_bits(tps->regmap, REG_RAMPCTRL, BIT(2), BIT(2)); | |
519 | if (st < 0) | |
2935fb18 LD |
520 | dev_err(tps->dev, |
521 | "%s(): register %d update failed with err %d\n", | |
522 | __func__, REG_RAMPCTRL, st); | |
6219929f LD |
523 | } |
524 | ||
525 | static const struct i2c_device_id tps62360_id[] = { | |
526 | {.name = "tps62360", .driver_data = TPS62360}, | |
527 | {.name = "tps62361", .driver_data = TPS62361}, | |
d1cf4f65 AL |
528 | {.name = "tps62362", .driver_data = TPS62362}, |
529 | {.name = "tps62363", .driver_data = TPS62363}, | |
6219929f LD |
530 | {}, |
531 | }; | |
532 | ||
533 | MODULE_DEVICE_TABLE(i2c, tps62360_id); | |
534 | ||
535 | static struct i2c_driver tps62360_i2c_driver = { | |
536 | .driver = { | |
537 | .name = "tps62360", | |
538 | .owner = THIS_MODULE, | |
684ae39b | 539 | .of_match_table = of_match_ptr(tps62360_of_match), |
6219929f LD |
540 | }, |
541 | .probe = tps62360_probe, | |
542 | .remove = __devexit_p(tps62360_remove), | |
543 | .shutdown = tps62360_shutdown, | |
544 | .id_table = tps62360_id, | |
545 | }; | |
546 | ||
547 | static int __init tps62360_init(void) | |
548 | { | |
549 | return i2c_add_driver(&tps62360_i2c_driver); | |
550 | } | |
551 | subsys_initcall(tps62360_init); | |
552 | ||
553 | static void __exit tps62360_cleanup(void) | |
554 | { | |
555 | i2c_del_driver(&tps62360_i2c_driver); | |
556 | } | |
557 | module_exit(tps62360_cleanup); | |
558 | ||
559 | MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); | |
d1cf4f65 | 560 | MODULE_DESCRIPTION("TPS6236x voltage regulator driver"); |
6219929f | 561 | MODULE_LICENSE("GPL v2"); |