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Linux/drivers/regulator/da903x.c

  1 /*
  2  * Regulators driver for Dialog Semiconductor DA903x
  3  *
  4  * Copyright (C) 2006-2008 Marvell International Ltd.
  5  * Copyright (C) 2008 Compulab Ltd.
  6  *
  7  * This program is free software; you can redistribute it and/or modify
  8  * it under the terms of the GNU General Public License version 2 as
  9  * published by the Free Software Foundation.
 10  */
 11 
 12 #include <linux/kernel.h>
 13 #include <linux/init.h>
 14 #include <linux/err.h>
 15 #include <linux/module.h>
 16 #include <linux/platform_device.h>
 17 #include <linux/regulator/driver.h>
 18 #include <linux/regulator/machine.h>
 19 #include <linux/mfd/da903x.h>
 20 
 21 /* DA9030 Registers */
 22 #define DA9030_INVAL            (-1)
 23 #define DA9030_LDO1011          (0x10)
 24 #define DA9030_LDO15            (0x11)
 25 #define DA9030_LDO1416          (0x12)
 26 #define DA9030_LDO1819          (0x13)
 27 #define DA9030_LDO17            (0x14)
 28 #define DA9030_BUCK2DVM1        (0x15)
 29 #define DA9030_BUCK2DVM2        (0x16)
 30 #define DA9030_RCTL11           (0x17)
 31 #define DA9030_RCTL21           (0x18)
 32 #define DA9030_LDO1             (0x90)
 33 #define DA9030_LDO23            (0x91)
 34 #define DA9030_LDO45            (0x92)
 35 #define DA9030_LDO6             (0x93)
 36 #define DA9030_LDO78            (0x94)
 37 #define DA9030_LDO912           (0x95)
 38 #define DA9030_BUCK             (0x96)
 39 #define DA9030_RCTL12           (0x97)
 40 #define DA9030_RCTL22           (0x98)
 41 #define DA9030_LDO_UNLOCK       (0xa0)
 42 #define DA9030_LDO_UNLOCK_MASK  (0xe0)
 43 #define DA9034_OVER1            (0x10)
 44 
 45 /* DA9034 Registers */
 46 #define DA9034_INVAL            (-1)
 47 #define DA9034_OVER2            (0x11)
 48 #define DA9034_OVER3            (0x12)
 49 #define DA9034_LDO643           (0x13)
 50 #define DA9034_LDO987           (0x14)
 51 #define DA9034_LDO1110          (0x15)
 52 #define DA9034_LDO1312          (0x16)
 53 #define DA9034_LDO1514          (0x17)
 54 #define DA9034_VCC1             (0x20)
 55 #define DA9034_ADTV1            (0x23)
 56 #define DA9034_ADTV2            (0x24)
 57 #define DA9034_AVRC             (0x25)
 58 #define DA9034_CDTV1            (0x26)
 59 #define DA9034_CDTV2            (0x27)
 60 #define DA9034_CVRC             (0x28)
 61 #define DA9034_SDTV1            (0x29)
 62 #define DA9034_SDTV2            (0x2a)
 63 #define DA9034_SVRC             (0x2b)
 64 #define DA9034_MDTV1            (0x32)
 65 #define DA9034_MDTV2            (0x33)
 66 #define DA9034_MVRC             (0x34)
 67 
 68 /* DA9035 Registers. DA9034 Registers are comptabile to DA9035. */
 69 #define DA9035_OVER3            (0x12)
 70 #define DA9035_VCC2             (0x1f)
 71 #define DA9035_3DTV1            (0x2c)
 72 #define DA9035_3DTV2            (0x2d)
 73 #define DA9035_3VRC             (0x2e)
 74 #define DA9035_AUTOSKIP         (0x2f)
 75 
 76 struct da903x_regulator_info {
 77         struct regulator_desc desc;
 78 
 79         int     max_uV;
 80         int     vol_reg;
 81         int     vol_shift;
 82         int     vol_nbits;
 83         int     update_reg;
 84         int     update_bit;
 85         int     enable_reg;
 86         int     enable_bit;
 87 };
 88 
 89 static inline struct device *to_da903x_dev(struct regulator_dev *rdev)
 90 {
 91         return rdev_get_dev(rdev)->parent->parent;
 92 }
 93 
 94 static inline int check_range(struct da903x_regulator_info *info,
 95                                 int min_uV, int max_uV)
 96 {
 97         if (min_uV < info->desc.min_uV || min_uV > info->max_uV)
 98                 return -EINVAL;
 99 
100         return 0;
101 }
102 
103 /* DA9030/DA9034 common operations */
104 static int da903x_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
105 {
106         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
107         struct device *da9034_dev = to_da903x_dev(rdev);
108         uint8_t val, mask;
109 
110         if (rdev->desc->n_voltages == 1)
111                 return -EINVAL;
112 
113         val = selector << info->vol_shift;
114         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
115 
116         return da903x_update(da9034_dev, info->vol_reg, val, mask);
117 }
118 
119 static int da903x_get_voltage_sel(struct regulator_dev *rdev)
120 {
121         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
122         struct device *da9034_dev = to_da903x_dev(rdev);
123         uint8_t val, mask;
124         int ret;
125 
126         if (rdev->desc->n_voltages == 1)
127                 return 0;
128 
129         ret = da903x_read(da9034_dev, info->vol_reg, &val);
130         if (ret)
131                 return ret;
132 
133         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
134         val = (val & mask) >> info->vol_shift;
135 
136         return val;
137 }
138 
139 static int da903x_enable(struct regulator_dev *rdev)
140 {
141         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
142         struct device *da9034_dev = to_da903x_dev(rdev);
143 
144         return da903x_set_bits(da9034_dev, info->enable_reg,
145                                         1 << info->enable_bit);
146 }
147 
148 static int da903x_disable(struct regulator_dev *rdev)
149 {
150         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
151         struct device *da9034_dev = to_da903x_dev(rdev);
152 
153         return da903x_clr_bits(da9034_dev, info->enable_reg,
154                                         1 << info->enable_bit);
155 }
156 
157 static int da903x_is_enabled(struct regulator_dev *rdev)
158 {
159         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
160         struct device *da9034_dev = to_da903x_dev(rdev);
161         uint8_t reg_val;
162         int ret;
163 
164         ret = da903x_read(da9034_dev, info->enable_reg, &reg_val);
165         if (ret)
166                 return ret;
167 
168         return !!(reg_val & (1 << info->enable_bit));
169 }
170 
171 /* DA9030 specific operations */
172 static int da9030_set_ldo1_15_voltage_sel(struct regulator_dev *rdev,
173                                           unsigned selector)
174 {
175         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
176         struct device *da903x_dev = to_da903x_dev(rdev);
177         uint8_t val, mask;
178         int ret;
179 
180         val = selector << info->vol_shift;
181         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
182         val |= DA9030_LDO_UNLOCK; /* have to set UNLOCK bits */
183         mask |= DA9030_LDO_UNLOCK_MASK;
184 
185         /* write twice */
186         ret = da903x_update(da903x_dev, info->vol_reg, val, mask);
187         if (ret)
188                 return ret;
189 
190         return da903x_update(da903x_dev, info->vol_reg, val, mask);
191 }
192 
193 static int da9030_map_ldo14_voltage(struct regulator_dev *rdev,
194                                     int min_uV, int max_uV)
195 {
196         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
197         int thresh, sel;
198 
199         if (check_range(info, min_uV, max_uV)) {
200                 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
201                 return -EINVAL;
202         }
203 
204         thresh = (info->max_uV + info->desc.min_uV) / 2;
205         if (min_uV < thresh) {
206                 sel = DIV_ROUND_UP(thresh - min_uV, info->desc.uV_step);
207                 sel |= 0x4;
208         } else {
209                 sel = DIV_ROUND_UP(min_uV - thresh, info->desc.uV_step);
210         }
211 
212         return sel;
213 }
214 
215 static int da9030_list_ldo14_voltage(struct regulator_dev *rdev,
216                                      unsigned selector)
217 {
218         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
219         int volt;
220 
221         if (selector & 0x4)
222                 volt = rdev->desc->min_uV +
223                        rdev->desc->uV_step * (3 - (selector & ~0x4));
224         else
225                 volt = (info->max_uV + rdev->desc->min_uV) / 2 +
226                        rdev->desc->uV_step * (selector & ~0x4);
227 
228         if (volt > info->max_uV)
229                 return -EINVAL;
230 
231         return volt;
232 }
233 
234 /* DA9034 specific operations */
235 static int da9034_set_dvc_voltage_sel(struct regulator_dev *rdev,
236                                       unsigned selector)
237 {
238         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
239         struct device *da9034_dev = to_da903x_dev(rdev);
240         uint8_t val, mask;
241         int ret;
242 
243         val = selector << info->vol_shift;
244         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
245 
246         ret = da903x_update(da9034_dev, info->vol_reg, val, mask);
247         if (ret)
248                 return ret;
249 
250         ret = da903x_set_bits(da9034_dev, info->update_reg,
251                                         1 << info->update_bit);
252         return ret;
253 }
254 
255 static const struct regulator_linear_range da9034_ldo12_ranges[] = {
256         REGULATOR_LINEAR_RANGE(1700000, 0, 7, 50000),
257         REGULATOR_LINEAR_RANGE(2700000, 8, 15, 50000),
258 };
259 
260 static struct regulator_ops da903x_regulator_ldo_ops = {
261         .set_voltage_sel = da903x_set_voltage_sel,
262         .get_voltage_sel = da903x_get_voltage_sel,
263         .list_voltage   = regulator_list_voltage_linear,
264         .map_voltage    = regulator_map_voltage_linear,
265         .enable         = da903x_enable,
266         .disable        = da903x_disable,
267         .is_enabled     = da903x_is_enabled,
268 };
269 
270 /* NOTE: this is dedicated for the insane DA9030 LDO14 */
271 static struct regulator_ops da9030_regulator_ldo14_ops = {
272         .set_voltage_sel = da903x_set_voltage_sel,
273         .get_voltage_sel = da903x_get_voltage_sel,
274         .list_voltage   = da9030_list_ldo14_voltage,
275         .map_voltage    = da9030_map_ldo14_voltage,
276         .enable         = da903x_enable,
277         .disable        = da903x_disable,
278         .is_enabled     = da903x_is_enabled,
279 };
280 
281 /* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks  */
282 static struct regulator_ops da9030_regulator_ldo1_15_ops = {
283         .set_voltage_sel = da9030_set_ldo1_15_voltage_sel,
284         .get_voltage_sel = da903x_get_voltage_sel,
285         .list_voltage   = regulator_list_voltage_linear,
286         .map_voltage    = regulator_map_voltage_linear,
287         .enable         = da903x_enable,
288         .disable        = da903x_disable,
289         .is_enabled     = da903x_is_enabled,
290 };
291 
292 static struct regulator_ops da9034_regulator_dvc_ops = {
293         .set_voltage_sel = da9034_set_dvc_voltage_sel,
294         .get_voltage_sel = da903x_get_voltage_sel,
295         .list_voltage   = regulator_list_voltage_linear,
296         .map_voltage    = regulator_map_voltage_linear,
297         .enable         = da903x_enable,
298         .disable        = da903x_disable,
299         .is_enabled     = da903x_is_enabled,
300 };
301 
302 /* NOTE: this is dedicated for the insane LDO12 */
303 static struct regulator_ops da9034_regulator_ldo12_ops = {
304         .set_voltage_sel = da903x_set_voltage_sel,
305         .get_voltage_sel = da903x_get_voltage_sel,
306         .list_voltage   = regulator_list_voltage_linear_range,
307         .map_voltage    = regulator_map_voltage_linear_range,
308         .enable         = da903x_enable,
309         .disable        = da903x_disable,
310         .is_enabled     = da903x_is_enabled,
311 };
312 
313 #define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit)  \
314 {                                                                       \
315         .desc   = {                                                     \
316                 .name   = "LDO" #_id,                                   \
317                 .ops    = &da903x_regulator_ldo_ops,                    \
318                 .type   = REGULATOR_VOLTAGE,                            \
319                 .id     = _pmic##_ID_LDO##_id,                          \
320                 .n_voltages = (step) ? ((max - min) / step + 1) : 1,    \
321                 .owner  = THIS_MODULE,                                  \
322                 .min_uV  = (min) * 1000,                                \
323                 .uV_step = (step) * 1000,                               \
324         },                                                              \
325         .max_uV         = (max) * 1000,                                 \
326         .vol_reg        = _pmic##_##vreg,                               \
327         .vol_shift      = (shift),                                      \
328         .vol_nbits      = (nbits),                                      \
329         .enable_reg     = _pmic##_##ereg,                               \
330         .enable_bit     = (ebit),                                       \
331 }
332 
333 #define DA903x_DVC(_pmic, _id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
334 {                                                                       \
335         .desc   = {                                                     \
336                 .name   = #_id,                                         \
337                 .ops    = &da9034_regulator_dvc_ops,                    \
338                 .type   = REGULATOR_VOLTAGE,                            \
339                 .id     = _pmic##_ID_##_id,                             \
340                 .n_voltages = (step) ? ((max - min) / step + 1) : 1,    \
341                 .owner  = THIS_MODULE,                                  \
342                 .min_uV = (min) * 1000,                                 \
343                 .uV_step = (step) * 1000,                               \
344         },                                                              \
345         .max_uV         = (max) * 1000,                                 \
346         .vol_reg        = _pmic##_##vreg,                               \
347         .vol_shift      = (0),                                          \
348         .vol_nbits      = (nbits),                                      \
349         .update_reg     = _pmic##_##ureg,                               \
350         .update_bit     = (ubit),                                       \
351         .enable_reg     = _pmic##_##ereg,                               \
352         .enable_bit     = (ebit),                                       \
353 }
354 
355 #define DA9034_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
356         DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
357 
358 #define DA9030_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
359         DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
360 
361 #define DA9030_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
362         DA903x_DVC(DA9030, _id, min, max, step, vreg, nbits, ureg, ubit, \
363                    ereg, ebit)
364 
365 #define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
366         DA903x_DVC(DA9034, _id, min, max, step, vreg, nbits, ureg, ubit, \
367                    ereg, ebit)
368 
369 #define DA9035_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
370         DA903x_DVC(DA9035, _id, min, max, step, vreg, nbits, ureg, ubit, \
371                    ereg, ebit)
372 
373 static struct da903x_regulator_info da903x_regulator_info[] = {
374         /* DA9030 */
375         DA9030_DVC(BUCK2, 850, 1625, 25, BUCK2DVM1, 5, BUCK2DVM1, 7, RCTL11, 0),
376 
377         DA9030_LDO( 1, 1200, 3200, 100,    LDO1, 0, 5, RCTL12, 1),
378         DA9030_LDO( 2, 1800, 3200, 100,   LDO23, 0, 4, RCTL12, 2),
379         DA9030_LDO( 3, 1800, 3200, 100,   LDO23, 4, 4, RCTL12, 3),
380         DA9030_LDO( 4, 1800, 3200, 100,   LDO45, 0, 4, RCTL12, 4),
381         DA9030_LDO( 5, 1800, 3200, 100,   LDO45, 4, 4, RCTL12, 5),
382         DA9030_LDO( 6, 1800, 3200, 100,    LDO6, 0, 4, RCTL12, 6),
383         DA9030_LDO( 7, 1800, 3200, 100,   LDO78, 0, 4, RCTL12, 7),
384         DA9030_LDO( 8, 1800, 3200, 100,   LDO78, 4, 4, RCTL22, 0),
385         DA9030_LDO( 9, 1800, 3200, 100,  LDO912, 0, 4, RCTL22, 1),
386         DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2),
387         DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3),
388         DA9030_LDO(12, 1800, 3200, 100,  LDO912, 4, 4, RCTL22, 4),
389         DA9030_LDO(14, 2760, 2940,  30, LDO1416, 0, 3, RCTL11, 4),
390         DA9030_LDO(15, 1100, 2650,  50,   LDO15, 0, 5, RCTL11, 5),
391         DA9030_LDO(16, 1100, 2650,  50, LDO1416, 3, 5, RCTL11, 6),
392         DA9030_LDO(17, 1800, 3200, 100,   LDO17, 0, 4, RCTL11, 7),
393         DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2),
394         DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1),
395         DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */
396 
397         /* DA9034 */
398         DA9034_DVC(BUCK1, 725, 1500, 25, ADTV2, 5, VCC1, 0, OVER1, 0),
399         DA9034_DVC(BUCK2, 725, 1500, 25, CDTV2, 5, VCC1, 2, OVER1, 1),
400         DA9034_DVC(LDO2,  725, 1500, 25, SDTV2, 5, VCC1, 4, OVER1, 2),
401         DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4),
402 
403         DA9034_LDO( 3, 1800, 3300, 100,  LDO643, 0, 4, OVER3, 5),
404         DA9034_LDO( 4, 1800, 2900,1100,  LDO643, 4, 1, OVER3, 6),
405         DA9034_LDO( 6, 2500, 2850,  50,  LDO643, 5, 3, OVER2, 0),
406         DA9034_LDO( 7, 2700, 3050,  50,  LDO987, 0, 3, OVER2, 1),
407         DA9034_LDO( 8, 2700, 2850,  50,  LDO987, 3, 2, OVER2, 2),
408         DA9034_LDO( 9, 2700, 3050,  50,  LDO987, 5, 3, OVER2, 3),
409         DA9034_LDO(10, 2700, 3050,  50, LDO1110, 0, 3, OVER2, 4),
410         DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5),
411         DA9034_LDO(12, 1700, 3050,  50, LDO1312, 0, 4, OVER3, 6),
412         DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7),
413         DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0),
414         DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1),
415         DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */
416 
417         /* DA9035 */
418         DA9035_DVC(BUCK3, 1800, 2200, 100, 3DTV1, 3, VCC2, 0, OVER3, 3),
419 };
420 
421 static inline struct da903x_regulator_info *find_regulator_info(int id)
422 {
423         struct da903x_regulator_info *ri;
424         int i;
425 
426         for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) {
427                 ri = &da903x_regulator_info[i];
428                 if (ri->desc.id == id)
429                         return ri;
430         }
431         return NULL;
432 }
433 
434 static int da903x_regulator_probe(struct platform_device *pdev)
435 {
436         struct da903x_regulator_info *ri = NULL;
437         struct regulator_dev *rdev;
438         struct regulator_config config = { };
439 
440         ri = find_regulator_info(pdev->id);
441         if (ri == NULL) {
442                 dev_err(&pdev->dev, "invalid regulator ID specified\n");
443                 return -EINVAL;
444         }
445 
446         /* Workaround for the weird LDO12 voltage setting */
447         if (ri->desc.id == DA9034_ID_LDO12) {
448                 ri->desc.ops = &da9034_regulator_ldo12_ops;
449                 ri->desc.n_voltages = 16;
450                 ri->desc.linear_ranges = da9034_ldo12_ranges;
451                 ri->desc.n_linear_ranges = ARRAY_SIZE(da9034_ldo12_ranges);
452         }
453 
454         if (ri->desc.id == DA9030_ID_LDO14)
455                 ri->desc.ops = &da9030_regulator_ldo14_ops;
456 
457         if (ri->desc.id == DA9030_ID_LDO1 || ri->desc.id == DA9030_ID_LDO15)
458                 ri->desc.ops = &da9030_regulator_ldo1_15_ops;
459 
460         config.dev = &pdev->dev;
461         config.init_data = dev_get_platdata(&pdev->dev);
462         config.driver_data = ri;
463 
464         rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
465         if (IS_ERR(rdev)) {
466                 dev_err(&pdev->dev, "failed to register regulator %s\n",
467                                 ri->desc.name);
468                 return PTR_ERR(rdev);
469         }
470 
471         platform_set_drvdata(pdev, rdev);
472         return 0;
473 }
474 
475 static struct platform_driver da903x_regulator_driver = {
476         .driver = {
477                 .name   = "da903x-regulator",
478                 .owner  = THIS_MODULE,
479         },
480         .probe          = da903x_regulator_probe,
481 };
482 
483 static int __init da903x_regulator_init(void)
484 {
485         return platform_driver_register(&da903x_regulator_driver);
486 }
487 subsys_initcall(da903x_regulator_init);
488 
489 static void __exit da903x_regulator_exit(void)
490 {
491         platform_driver_unregister(&da903x_regulator_driver);
492 }
493 module_exit(da903x_regulator_exit);
494 
495 MODULE_LICENSE("GPL");
496 MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
497               "Mike Rapoport <mike@compulab.co.il>");
498 MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
499 MODULE_ALIAS("platform:da903x-regulator");
500 

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