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5e9384c7 KK |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // | |
3 | // max8998.c - Voltage regulator driver for the Maxim 8998 | |
4 | // | |
5 | // Copyright (C) 2009-2010 Samsung Electronics | |
6 | // Kyungmin Park <kyungmin.park@samsung.com> | |
7 | // Marek Szyprowski <m.szyprowski@samsung.com> | |
156f2528 KP |
8 | |
9 | #include <linux/module.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/i2c.h> | |
12 | #include <linux/err.h> | |
13 | #include <linux/gpio.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/mutex.h> | |
ee999fb3 TF |
17 | #include <linux/of.h> |
18 | #include <linux/of_gpio.h> | |
156f2528 KP |
19 | #include <linux/platform_device.h> |
20 | #include <linux/regulator/driver.h> | |
ee999fb3 | 21 | #include <linux/regulator/of_regulator.h> |
156f2528 KP |
22 | #include <linux/mfd/max8998.h> |
23 | #include <linux/mfd/max8998-private.h> | |
24 | ||
25 | struct max8998_data { | |
26 | struct device *dev; | |
27 | struct max8998_dev *iodev; | |
28 | int num_regulators; | |
889cd5a6 LM |
29 | u8 buck1_vol[4]; /* voltages for selection */ |
30 | u8 buck2_vol[2]; | |
31 | unsigned int buck1_idx; /* index to last changed voltage */ | |
32 | /* value in a set */ | |
33 | unsigned int buck2_idx; | |
156f2528 KP |
34 | }; |
35 | ||
156f2528 KP |
36 | static int max8998_get_enable_register(struct regulator_dev *rdev, |
37 | int *reg, int *shift) | |
38 | { | |
7b94791b | 39 | int ldo = rdev_get_id(rdev); |
156f2528 KP |
40 | |
41 | switch (ldo) { | |
42 | case MAX8998_LDO2 ... MAX8998_LDO5: | |
43 | *reg = MAX8998_REG_ONOFF1; | |
44 | *shift = 3 - (ldo - MAX8998_LDO2); | |
45 | break; | |
46 | case MAX8998_LDO6 ... MAX8998_LDO13: | |
47 | *reg = MAX8998_REG_ONOFF2; | |
48 | *shift = 7 - (ldo - MAX8998_LDO6); | |
49 | break; | |
50 | case MAX8998_LDO14 ... MAX8998_LDO17: | |
51 | *reg = MAX8998_REG_ONOFF3; | |
52 | *shift = 7 - (ldo - MAX8998_LDO14); | |
53 | break; | |
54 | case MAX8998_BUCK1 ... MAX8998_BUCK4: | |
55 | *reg = MAX8998_REG_ONOFF1; | |
56 | *shift = 7 - (ldo - MAX8998_BUCK1); | |
57 | break; | |
58 | case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG: | |
59 | *reg = MAX8998_REG_ONOFF4; | |
60 | *shift = 7 - (ldo - MAX8998_EN32KHZ_AP); | |
61 | break; | |
62 | case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2: | |
63 | *reg = MAX8998_REG_CHGR2; | |
64 | *shift = 7 - (ldo - MAX8998_ESAFEOUT1); | |
65 | break; | |
66 | default: | |
67 | return -EINVAL; | |
68 | } | |
69 | ||
70 | return 0; | |
71 | } | |
72 | ||
73 | static int max8998_ldo_is_enabled(struct regulator_dev *rdev) | |
74 | { | |
75 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 76 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
77 | int ret, reg, shift = 8; |
78 | u8 val; | |
79 | ||
80 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
81 | if (ret) | |
82 | return ret; | |
83 | ||
676e02d7 | 84 | ret = max8998_read_reg(i2c, reg, &val); |
156f2528 KP |
85 | if (ret) |
86 | return ret; | |
87 | ||
88 | return val & (1 << shift); | |
89 | } | |
90 | ||
91 | static int max8998_ldo_enable(struct regulator_dev *rdev) | |
92 | { | |
93 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 94 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
95 | int reg, shift = 8, ret; |
96 | ||
97 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
98 | if (ret) | |
99 | return ret; | |
100 | ||
676e02d7 | 101 | return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift); |
156f2528 KP |
102 | } |
103 | ||
104 | static int max8998_ldo_disable(struct regulator_dev *rdev) | |
105 | { | |
106 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 107 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
108 | int reg, shift = 8, ret; |
109 | ||
110 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
111 | if (ret) | |
112 | return ret; | |
113 | ||
676e02d7 | 114 | return max8998_update_reg(i2c, reg, 0, 1<<shift); |
156f2528 KP |
115 | } |
116 | ||
117 | static int max8998_get_voltage_register(struct regulator_dev *rdev, | |
118 | int *_reg, int *_shift, int *_mask) | |
119 | { | |
7b94791b | 120 | int ldo = rdev_get_id(rdev); |
889cd5a6 | 121 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
156f2528 KP |
122 | int reg, shift = 0, mask = 0xff; |
123 | ||
124 | switch (ldo) { | |
125 | case MAX8998_LDO2 ... MAX8998_LDO3: | |
126 | reg = MAX8998_REG_LDO2_LDO3; | |
127 | mask = 0xf; | |
128 | if (ldo == MAX8998_LDO2) | |
129 | shift = 4; | |
130 | else | |
131 | shift = 0; | |
132 | break; | |
133 | case MAX8998_LDO4 ... MAX8998_LDO7: | |
134 | reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4); | |
135 | break; | |
136 | case MAX8998_LDO8 ... MAX8998_LDO9: | |
137 | reg = MAX8998_REG_LDO8_LDO9; | |
138 | mask = 0xf; | |
139 | if (ldo == MAX8998_LDO8) | |
140 | shift = 4; | |
141 | else | |
142 | shift = 0; | |
143 | break; | |
144 | case MAX8998_LDO10 ... MAX8998_LDO11: | |
145 | reg = MAX8998_REG_LDO10_LDO11; | |
146 | if (ldo == MAX8998_LDO10) { | |
147 | shift = 5; | |
148 | mask = 0x7; | |
149 | } else { | |
150 | shift = 0; | |
151 | mask = 0x1f; | |
152 | } | |
153 | break; | |
154 | case MAX8998_LDO12 ... MAX8998_LDO17: | |
155 | reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12); | |
156 | break; | |
157 | case MAX8998_BUCK1: | |
889cd5a6 | 158 | reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx; |
156f2528 KP |
159 | break; |
160 | case MAX8998_BUCK2: | |
889cd5a6 | 161 | reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx; |
156f2528 KP |
162 | break; |
163 | case MAX8998_BUCK3: | |
164 | reg = MAX8998_REG_BUCK3; | |
165 | break; | |
166 | case MAX8998_BUCK4: | |
167 | reg = MAX8998_REG_BUCK4; | |
168 | break; | |
169 | default: | |
170 | return -EINVAL; | |
171 | } | |
172 | ||
173 | *_reg = reg; | |
174 | *_shift = shift; | |
175 | *_mask = mask; | |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
7b4354b4 | 180 | static int max8998_get_voltage_sel(struct regulator_dev *rdev) |
156f2528 KP |
181 | { |
182 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 183 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
184 | int reg, shift = 0, mask, ret; |
185 | u8 val; | |
186 | ||
187 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); | |
188 | if (ret) | |
189 | return ret; | |
190 | ||
676e02d7 | 191 | ret = max8998_read_reg(i2c, reg, &val); |
156f2528 KP |
192 | if (ret) |
193 | return ret; | |
194 | ||
195 | val >>= shift; | |
196 | val &= mask; | |
197 | ||
7b4354b4 | 198 | return val; |
156f2528 KP |
199 | } |
200 | ||
baae019e AL |
201 | static int max8998_set_voltage_ldo_sel(struct regulator_dev *rdev, |
202 | unsigned selector) | |
9d92492f LM |
203 | { |
204 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
205 | struct i2c_client *i2c = max8998->iodev->i2c; | |
baae019e | 206 | int reg, shift = 0, mask, ret; |
3a93f2a9 | 207 | |
9d92492f LM |
208 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
209 | if (ret) | |
210 | return ret; | |
211 | ||
baae019e | 212 | ret = max8998_update_reg(i2c, reg, selector<<shift, mask<<shift); |
9d92492f LM |
213 | |
214 | return ret; | |
215 | } | |
216 | ||
50f19a45 LM |
217 | static inline void buck1_gpio_set(int gpio1, int gpio2, int v) |
218 | { | |
219 | gpio_set_value(gpio1, v & 0x1); | |
220 | gpio_set_value(gpio2, (v >> 1) & 0x1); | |
221 | } | |
222 | ||
223 | static inline void buck2_gpio_set(int gpio, int v) | |
224 | { | |
225 | gpio_set_value(gpio, v & 0x1); | |
226 | } | |
227 | ||
baae019e AL |
228 | static int max8998_set_voltage_buck_sel(struct regulator_dev *rdev, |
229 | unsigned selector) | |
156f2528 KP |
230 | { |
231 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
c1472737 | 232 | struct max8998_platform_data *pdata = max8998->iodev->pdata; |
676e02d7 | 233 | struct i2c_client *i2c = max8998->iodev->i2c; |
7b94791b | 234 | int buck = rdev_get_id(rdev); |
c6163a70 | 235 | int reg, shift = 0, mask, ret, j; |
50f19a45 | 236 | static u8 buck1_last_val; |
156f2528 | 237 | |
156f2528 KP |
238 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
239 | if (ret) | |
240 | return ret; | |
241 | ||
50f19a45 LM |
242 | switch (buck) { |
243 | case MAX8998_BUCK1: | |
244 | dev_dbg(max8998->dev, | |
baae019e | 245 | "BUCK1, selector:%d, buck1_vol1:%d, buck1_vol2:%d\n" |
85ee7a1d | 246 | "buck1_vol3:%d, buck1_vol4:%d\n", |
baae019e | 247 | selector, max8998->buck1_vol[0], max8998->buck1_vol[1], |
50f19a45 LM |
248 | max8998->buck1_vol[2], max8998->buck1_vol[3]); |
249 | ||
250 | if (gpio_is_valid(pdata->buck1_set1) && | |
251 | gpio_is_valid(pdata->buck1_set2)) { | |
252 | ||
253 | /* check if requested voltage */ | |
254 | /* value is already defined */ | |
255 | for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) { | |
baae019e | 256 | if (max8998->buck1_vol[j] == selector) { |
50f19a45 LM |
257 | max8998->buck1_idx = j; |
258 | buck1_gpio_set(pdata->buck1_set1, | |
259 | pdata->buck1_set2, j); | |
260 | goto buck1_exit; | |
261 | } | |
262 | } | |
263 | ||
735a3d9e MH |
264 | if (pdata->buck_voltage_lock) |
265 | return -EINVAL; | |
266 | ||
50f19a45 LM |
267 | /* no predefine regulator found */ |
268 | max8998->buck1_idx = (buck1_last_val % 2) + 2; | |
269 | dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n", | |
270 | max8998->buck1_idx); | |
baae019e | 271 | max8998->buck1_vol[max8998->buck1_idx] = selector; |
50f19a45 LM |
272 | ret = max8998_get_voltage_register(rdev, ®, |
273 | &shift, | |
274 | &mask); | |
baae019e | 275 | ret = max8998_write_reg(i2c, reg, selector); |
50f19a45 LM |
276 | buck1_gpio_set(pdata->buck1_set1, |
277 | pdata->buck1_set2, max8998->buck1_idx); | |
278 | buck1_last_val++; | |
279 | buck1_exit: | |
280 | dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n", | |
281 | i2c->name, gpio_get_value(pdata->buck1_set1), | |
282 | gpio_get_value(pdata->buck1_set2)); | |
283 | break; | |
284 | } else { | |
baae019e | 285 | ret = max8998_write_reg(i2c, reg, selector); |
50f19a45 LM |
286 | } |
287 | break; | |
c5a4655d | 288 | |
50f19a45 LM |
289 | case MAX8998_BUCK2: |
290 | dev_dbg(max8998->dev, | |
baae019e AL |
291 | "BUCK2, selector:%d buck2_vol1:%d, buck2_vol2:%d\n", |
292 | selector, max8998->buck2_vol[0], max8998->buck2_vol[1]); | |
50f19a45 | 293 | if (gpio_is_valid(pdata->buck2_set3)) { |
735a3d9e MH |
294 | |
295 | /* check if requested voltage */ | |
296 | /* value is already defined */ | |
297 | for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) { | |
baae019e | 298 | if (max8998->buck2_vol[j] == selector) { |
735a3d9e MH |
299 | max8998->buck2_idx = j; |
300 | buck2_gpio_set(pdata->buck2_set3, j); | |
301 | goto buck2_exit; | |
302 | } | |
50f19a45 | 303 | } |
735a3d9e MH |
304 | |
305 | if (pdata->buck_voltage_lock) | |
306 | return -EINVAL; | |
307 | ||
308 | max8998_get_voltage_register(rdev, | |
309 | ®, &shift, &mask); | |
baae019e AL |
310 | ret = max8998_write_reg(i2c, reg, selector); |
311 | max8998->buck2_vol[max8998->buck2_idx] = selector; | |
735a3d9e MH |
312 | buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx); |
313 | buck2_exit: | |
50f19a45 LM |
314 | dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name, |
315 | gpio_get_value(pdata->buck2_set3)); | |
316 | } else { | |
baae019e | 317 | ret = max8998_write_reg(i2c, reg, selector); |
50f19a45 LM |
318 | } |
319 | break; | |
320 | ||
321 | case MAX8998_BUCK3: | |
322 | case MAX8998_BUCK4: | |
baae019e AL |
323 | ret = max8998_update_reg(i2c, reg, selector<<shift, |
324 | mask<<shift); | |
50f19a45 | 325 | break; |
c5a4655d MH |
326 | } |
327 | ||
276909d3 AL |
328 | return ret; |
329 | } | |
330 | ||
331 | static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev, | |
332 | unsigned int old_selector, | |
333 | unsigned int new_selector) | |
334 | { | |
335 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
336 | struct i2c_client *i2c = max8998->iodev->i2c; | |
276909d3 AL |
337 | int buck = rdev_get_id(rdev); |
338 | u8 val = 0; | |
339 | int difference, ret; | |
340 | ||
341 | if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4) | |
342 | return -EINVAL; | |
343 | ||
50f19a45 | 344 | /* Voltage stabilization */ |
276909d3 AL |
345 | ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val); |
346 | if (ret) | |
347 | return ret; | |
50f19a45 LM |
348 | |
349 | /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */ | |
350 | /* MAX8998 has ENRAMP bit implemented, so test it*/ | |
351 | if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP)) | |
276909d3 | 352 | return 0; |
50f19a45 | 353 | |
0dceab33 | 354 | difference = (new_selector - old_selector) * rdev->desc->uV_step / 1000; |
50f19a45 | 355 | if (difference > 0) |
81d0a6ae | 356 | return DIV_ROUND_UP(difference, (val & 0x0f) + 1); |
50f19a45 | 357 | |
276909d3 | 358 | return 0; |
156f2528 KP |
359 | } |
360 | ||
7d695f20 | 361 | static const struct regulator_ops max8998_ldo_ops = { |
9a0fbb62 | 362 | .list_voltage = regulator_list_voltage_linear, |
baae019e | 363 | .map_voltage = regulator_map_voltage_linear, |
156f2528 KP |
364 | .is_enabled = max8998_ldo_is_enabled, |
365 | .enable = max8998_ldo_enable, | |
366 | .disable = max8998_ldo_disable, | |
7b4354b4 | 367 | .get_voltage_sel = max8998_get_voltage_sel, |
baae019e | 368 | .set_voltage_sel = max8998_set_voltage_ldo_sel, |
156f2528 KP |
369 | }; |
370 | ||
7d695f20 | 371 | static const struct regulator_ops max8998_buck_ops = { |
9a0fbb62 | 372 | .list_voltage = regulator_list_voltage_linear, |
baae019e | 373 | .map_voltage = regulator_map_voltage_linear, |
156f2528 KP |
374 | .is_enabled = max8998_ldo_is_enabled, |
375 | .enable = max8998_ldo_enable, | |
376 | .disable = max8998_ldo_disable, | |
7b4354b4 | 377 | .get_voltage_sel = max8998_get_voltage_sel, |
baae019e | 378 | .set_voltage_sel = max8998_set_voltage_buck_sel, |
276909d3 | 379 | .set_voltage_time_sel = max8998_set_voltage_buck_time_sel, |
156f2528 KP |
380 | }; |
381 | ||
7d695f20 | 382 | static const struct regulator_ops max8998_others_ops = { |
156f2528 KP |
383 | .is_enabled = max8998_ldo_is_enabled, |
384 | .enable = max8998_ldo_enable, | |
385 | .disable = max8998_ldo_disable, | |
156f2528 KP |
386 | }; |
387 | ||
0dceab33 AL |
388 | #define MAX8998_LINEAR_REG(_name, _ops, _min, _step, _max) \ |
389 | { \ | |
390 | .name = #_name, \ | |
391 | .id = MAX8998_##_name, \ | |
392 | .ops = _ops, \ | |
393 | .min_uV = (_min), \ | |
394 | .uV_step = (_step), \ | |
395 | .n_voltages = ((_max) - (_min)) / (_step) + 1, \ | |
396 | .type = REGULATOR_VOLTAGE, \ | |
397 | .owner = THIS_MODULE, \ | |
156f2528 | 398 | } |
0dceab33 AL |
399 | |
400 | #define MAX8998_OTHERS_REG(_name, _id) \ | |
401 | { \ | |
402 | .name = #_name, \ | |
403 | .id = _id, \ | |
404 | .ops = &max8998_others_ops, \ | |
405 | .type = REGULATOR_VOLTAGE, \ | |
406 | .owner = THIS_MODULE, \ | |
407 | } | |
408 | ||
409 | static const struct regulator_desc regulators[] = { | |
410 | MAX8998_LINEAR_REG(LDO2, &max8998_ldo_ops, 800000, 50000, 1300000), | |
411 | MAX8998_LINEAR_REG(LDO3, &max8998_ldo_ops, 800000, 50000, 1300000), | |
412 | MAX8998_LINEAR_REG(LDO4, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
413 | MAX8998_LINEAR_REG(LDO5, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
414 | MAX8998_LINEAR_REG(LDO6, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
415 | MAX8998_LINEAR_REG(LDO7, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
416 | MAX8998_LINEAR_REG(LDO8, &max8998_ldo_ops, 3000000, 100000, 3600000), | |
417 | MAX8998_LINEAR_REG(LDO9, &max8998_ldo_ops, 2800000, 100000, 3100000), | |
418 | MAX8998_LINEAR_REG(LDO10, &max8998_ldo_ops, 950000, 50000, 1300000), | |
419 | MAX8998_LINEAR_REG(LDO11, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
420 | MAX8998_LINEAR_REG(LDO12, &max8998_ldo_ops, 800000, 100000, 3300000), | |
421 | MAX8998_LINEAR_REG(LDO13, &max8998_ldo_ops, 800000, 100000, 3300000), | |
422 | MAX8998_LINEAR_REG(LDO14, &max8998_ldo_ops, 1200000, 100000, 3300000), | |
423 | MAX8998_LINEAR_REG(LDO15, &max8998_ldo_ops, 1200000, 100000, 3300000), | |
424 | MAX8998_LINEAR_REG(LDO16, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
425 | MAX8998_LINEAR_REG(LDO17, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
426 | MAX8998_LINEAR_REG(BUCK1, &max8998_buck_ops, 750000, 25000, 1525000), | |
427 | MAX8998_LINEAR_REG(BUCK2, &max8998_buck_ops, 750000, 25000, 1525000), | |
428 | MAX8998_LINEAR_REG(BUCK3, &max8998_buck_ops, 1600000, 100000, 3600000), | |
429 | MAX8998_LINEAR_REG(BUCK4, &max8998_buck_ops, 800000, 100000, 2300000), | |
430 | MAX8998_OTHERS_REG(EN32KHz-AP, MAX8998_EN32KHZ_AP), | |
431 | MAX8998_OTHERS_REG(EN32KHz-CP, MAX8998_EN32KHZ_CP), | |
432 | MAX8998_OTHERS_REG(ENVICHG, MAX8998_ENVICHG), | |
433 | MAX8998_OTHERS_REG(ESAFEOUT1, MAX8998_ESAFEOUT1), | |
434 | MAX8998_OTHERS_REG(ESAFEOUT2, MAX8998_ESAFEOUT2), | |
156f2528 KP |
435 | }; |
436 | ||
ee999fb3 TF |
437 | static int max8998_pmic_dt_parse_dvs_gpio(struct max8998_dev *iodev, |
438 | struct max8998_platform_data *pdata, | |
439 | struct device_node *pmic_np) | |
440 | { | |
441 | int gpio; | |
442 | ||
443 | gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 0); | |
444 | if (!gpio_is_valid(gpio)) { | |
445 | dev_err(iodev->dev, "invalid buck1 gpio[0]: %d\n", gpio); | |
446 | return -EINVAL; | |
447 | } | |
448 | pdata->buck1_set1 = gpio; | |
449 | ||
450 | gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 1); | |
451 | if (!gpio_is_valid(gpio)) { | |
452 | dev_err(iodev->dev, "invalid buck1 gpio[1]: %d\n", gpio); | |
453 | return -EINVAL; | |
454 | } | |
455 | pdata->buck1_set2 = gpio; | |
456 | ||
457 | gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck2-dvs-gpio", 0); | |
458 | if (!gpio_is_valid(gpio)) { | |
459 | dev_err(iodev->dev, "invalid buck 2 gpio: %d\n", gpio); | |
460 | return -EINVAL; | |
461 | } | |
462 | pdata->buck2_set3 = gpio; | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | static int max8998_pmic_dt_parse_pdata(struct max8998_dev *iodev, | |
468 | struct max8998_platform_data *pdata) | |
469 | { | |
470 | struct device_node *pmic_np = iodev->dev->of_node; | |
471 | struct device_node *regulators_np, *reg_np; | |
472 | struct max8998_regulator_data *rdata; | |
473 | unsigned int i; | |
474 | int ret; | |
475 | ||
476 | regulators_np = of_get_child_by_name(pmic_np, "regulators"); | |
477 | if (!regulators_np) { | |
478 | dev_err(iodev->dev, "could not find regulators sub-node\n"); | |
479 | return -EINVAL; | |
480 | } | |
481 | ||
482 | /* count the number of regulators to be supported in pmic */ | |
483 | pdata->num_regulators = of_get_child_count(regulators_np); | |
484 | ||
a86854d0 KC |
485 | rdata = devm_kcalloc(iodev->dev, |
486 | pdata->num_regulators, sizeof(*rdata), | |
487 | GFP_KERNEL); | |
58c95377 SK |
488 | if (!rdata) { |
489 | of_node_put(regulators_np); | |
ee999fb3 | 490 | return -ENOMEM; |
58c95377 | 491 | } |
ee999fb3 TF |
492 | |
493 | pdata->regulators = rdata; | |
494 | for (i = 0; i < ARRAY_SIZE(regulators); ++i) { | |
495 | reg_np = of_get_child_by_name(regulators_np, | |
496 | regulators[i].name); | |
497 | if (!reg_np) | |
498 | continue; | |
499 | ||
500 | rdata->id = regulators[i].id; | |
072e78b1 JMC |
501 | rdata->initdata = of_get_regulator_init_data(iodev->dev, |
502 | reg_np, | |
503 | ®ulators[i]); | |
ee999fb3 TF |
504 | rdata->reg_node = reg_np; |
505 | ++rdata; | |
506 | } | |
507 | pdata->num_regulators = rdata - pdata->regulators; | |
508 | ||
58c95377 SK |
509 | of_node_put(reg_np); |
510 | of_node_put(regulators_np); | |
511 | ||
ee999fb3 TF |
512 | ret = max8998_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); |
513 | if (ret) | |
514 | return -EINVAL; | |
515 | ||
516 | if (of_find_property(pmic_np, "max8998,pmic-buck-voltage-lock", NULL)) | |
517 | pdata->buck_voltage_lock = true; | |
518 | ||
519 | ret = of_property_read_u32(pmic_np, | |
520 | "max8998,pmic-buck1-default-dvs-idx", | |
521 | &pdata->buck1_default_idx); | |
522 | if (!ret && pdata->buck1_default_idx >= 4) { | |
523 | pdata->buck1_default_idx = 0; | |
524 | dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n"); | |
525 | } | |
526 | ||
527 | ret = of_property_read_u32(pmic_np, | |
528 | "max8998,pmic-buck2-default-dvs-idx", | |
529 | &pdata->buck2_default_idx); | |
530 | if (!ret && pdata->buck2_default_idx >= 2) { | |
531 | pdata->buck2_default_idx = 0; | |
532 | dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n"); | |
533 | } | |
534 | ||
535 | ret = of_property_read_u32_array(pmic_np, | |
536 | "max8998,pmic-buck1-dvs-voltage", | |
537 | pdata->buck1_voltage, | |
538 | ARRAY_SIZE(pdata->buck1_voltage)); | |
539 | if (ret) { | |
540 | dev_err(iodev->dev, "buck1 voltages not specified\n"); | |
541 | return -EINVAL; | |
542 | } | |
543 | ||
544 | ret = of_property_read_u32_array(pmic_np, | |
545 | "max8998,pmic-buck2-dvs-voltage", | |
546 | pdata->buck2_voltage, | |
547 | ARRAY_SIZE(pdata->buck2_voltage)); | |
548 | if (ret) { | |
549 | dev_err(iodev->dev, "buck2 voltages not specified\n"); | |
550 | return -EINVAL; | |
551 | } | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
a5023574 | 556 | static int max8998_pmic_probe(struct platform_device *pdev) |
156f2528 KP |
557 | { |
558 | struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
ee999fb3 | 559 | struct max8998_platform_data *pdata = iodev->pdata; |
c172708d | 560 | struct regulator_config config = { }; |
8a221df6 | 561 | struct regulator_dev *rdev; |
156f2528 | 562 | struct max8998_data *max8998; |
50f19a45 | 563 | struct i2c_client *i2c; |
8a221df6 | 564 | int i, ret; |
4280e0b4 | 565 | unsigned int v; |
156f2528 KP |
566 | |
567 | if (!pdata) { | |
568 | dev_err(pdev->dev.parent, "No platform init data supplied\n"); | |
569 | return -ENODEV; | |
570 | } | |
571 | ||
ee999fb3 TF |
572 | if (IS_ENABLED(CONFIG_OF) && iodev->dev->of_node) { |
573 | ret = max8998_pmic_dt_parse_pdata(iodev, pdata); | |
574 | if (ret) | |
575 | return ret; | |
576 | } | |
577 | ||
0f80ea14 AL |
578 | max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data), |
579 | GFP_KERNEL); | |
156f2528 KP |
580 | if (!max8998) |
581 | return -ENOMEM; | |
582 | ||
747cc851 | 583 | max8998->dev = &pdev->dev; |
156f2528 | 584 | max8998->iodev = iodev; |
c356cbc2 | 585 | max8998->num_regulators = pdata->num_regulators; |
156f2528 | 586 | platform_set_drvdata(pdev, max8998); |
50f19a45 LM |
587 | i2c = max8998->iodev->i2c; |
588 | ||
735a3d9e MH |
589 | max8998->buck1_idx = pdata->buck1_default_idx; |
590 | max8998->buck2_idx = pdata->buck2_default_idx; | |
591 | ||
50f19a45 LM |
592 | /* NOTE: */ |
593 | /* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */ | |
594 | /* will be displayed */ | |
595 | ||
596 | /* Check if MAX8998 voltage selection GPIOs are defined */ | |
597 | if (gpio_is_valid(pdata->buck1_set1) && | |
598 | gpio_is_valid(pdata->buck1_set2)) { | |
599 | /* Check if SET1 is not equal to 0 */ | |
600 | if (!pdata->buck1_set1) { | |
9df19a55 TF |
601 | dev_err(&pdev->dev, |
602 | "MAX8998 SET1 GPIO defined as 0 !\n"); | |
50f19a45 | 603 | WARN_ON(!pdata->buck1_set1); |
8d491bf4 | 604 | return -EIO; |
50f19a45 LM |
605 | } |
606 | /* Check if SET2 is not equal to 0 */ | |
607 | if (!pdata->buck1_set2) { | |
9df19a55 TF |
608 | dev_err(&pdev->dev, |
609 | "MAX8998 SET2 GPIO defined as 0 !\n"); | |
50f19a45 | 610 | WARN_ON(!pdata->buck1_set2); |
8d491bf4 | 611 | return -EIO; |
50f19a45 LM |
612 | } |
613 | ||
614 | gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1"); | |
615 | gpio_direction_output(pdata->buck1_set1, | |
616 | max8998->buck1_idx & 0x1); | |
617 | ||
618 | ||
619 | gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2"); | |
620 | gpio_direction_output(pdata->buck1_set2, | |
621 | (max8998->buck1_idx >> 1) & 0x1); | |
50f19a45 | 622 | |
4280e0b4 TF |
623 | /* Set predefined values for BUCK1 registers */ |
624 | for (v = 0; v < ARRAY_SIZE(pdata->buck1_voltage); ++v) { | |
0dceab33 AL |
625 | int index = MAX8998_BUCK1 - MAX8998_LDO2; |
626 | ||
4280e0b4 | 627 | i = 0; |
0dceab33 AL |
628 | while (regulators[index].min_uV + |
629 | regulators[index].uV_step * i | |
4280e0b4 TF |
630 | < pdata->buck1_voltage[v]) |
631 | i++; | |
632 | ||
633 | max8998->buck1_vol[v] = i; | |
634 | ret = max8998_write_reg(i2c, | |
635 | MAX8998_REG_BUCK1_VOLTAGE1 + v, i); | |
636 | if (ret) | |
8d491bf4 | 637 | return ret; |
4280e0b4 | 638 | } |
50f19a45 LM |
639 | } |
640 | ||
641 | if (gpio_is_valid(pdata->buck2_set3)) { | |
642 | /* Check if SET3 is not equal to 0 */ | |
643 | if (!pdata->buck2_set3) { | |
9df19a55 TF |
644 | dev_err(&pdev->dev, |
645 | "MAX8998 SET3 GPIO defined as 0 !\n"); | |
50f19a45 | 646 | WARN_ON(!pdata->buck2_set3); |
8d491bf4 | 647 | return -EIO; |
50f19a45 LM |
648 | } |
649 | gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3"); | |
650 | gpio_direction_output(pdata->buck2_set3, | |
651 | max8998->buck2_idx & 0x1); | |
652 | ||
4280e0b4 TF |
653 | /* Set predefined values for BUCK2 registers */ |
654 | for (v = 0; v < ARRAY_SIZE(pdata->buck2_voltage); ++v) { | |
0dceab33 AL |
655 | int index = MAX8998_BUCK2 - MAX8998_LDO2; |
656 | ||
4280e0b4 | 657 | i = 0; |
0dceab33 AL |
658 | while (regulators[index].min_uV + |
659 | regulators[index].uV_step * i | |
4280e0b4 TF |
660 | < pdata->buck2_voltage[v]) |
661 | i++; | |
662 | ||
663 | max8998->buck2_vol[v] = i; | |
664 | ret = max8998_write_reg(i2c, | |
665 | MAX8998_REG_BUCK2_VOLTAGE1 + v, i); | |
666 | if (ret) | |
8d491bf4 | 667 | return ret; |
4280e0b4 | 668 | } |
50f19a45 | 669 | } |
156f2528 KP |
670 | |
671 | for (i = 0; i < pdata->num_regulators; i++) { | |
0dceab33 | 672 | int index = pdata->regulators[i].id - MAX8998_LDO2; |
c172708d MB |
673 | |
674 | config.dev = max8998->dev; | |
ee999fb3 | 675 | config.of_node = pdata->regulators[i].reg_node; |
c172708d MB |
676 | config.init_data = pdata->regulators[i].initdata; |
677 | config.driver_data = max8998; | |
678 | ||
8a221df6 AL |
679 | rdev = devm_regulator_register(&pdev->dev, ®ulators[index], |
680 | &config); | |
681 | if (IS_ERR(rdev)) { | |
682 | ret = PTR_ERR(rdev); | |
ee999fb3 TF |
683 | dev_err(max8998->dev, "regulator %s init failed (%d)\n", |
684 | regulators[index].name, ret); | |
8d491bf4 | 685 | return ret; |
156f2528 KP |
686 | } |
687 | } | |
688 | ||
156f2528 KP |
689 | return 0; |
690 | } | |
691 | ||
337ce5d1 MH |
692 | static const struct platform_device_id max8998_pmic_id[] = { |
693 | { "max8998-pmic", TYPE_MAX8998 }, | |
694 | { "lp3974-pmic", TYPE_LP3974 }, | |
695 | { } | |
696 | }; | |
a51b907b | 697 | MODULE_DEVICE_TABLE(platform, max8998_pmic_id); |
337ce5d1 | 698 | |
156f2528 KP |
699 | static struct platform_driver max8998_pmic_driver = { |
700 | .driver = { | |
701 | .name = "max8998-pmic", | |
156f2528 KP |
702 | }, |
703 | .probe = max8998_pmic_probe, | |
337ce5d1 | 704 | .id_table = max8998_pmic_id, |
156f2528 KP |
705 | }; |
706 | ||
707 | static int __init max8998_pmic_init(void) | |
708 | { | |
709 | return platform_driver_register(&max8998_pmic_driver); | |
710 | } | |
711 | subsys_initcall(max8998_pmic_init); | |
712 | ||
713 | static void __exit max8998_pmic_cleanup(void) | |
714 | { | |
715 | platform_driver_unregister(&max8998_pmic_driver); | |
716 | } | |
717 | module_exit(max8998_pmic_cleanup); | |
718 | ||
719 | MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver"); | |
720 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); | |
721 | MODULE_LICENSE("GPL"); |