Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

Linux/drivers/regulator/ab8500-ext.c

  1 /*
  2  * Copyright (C) ST-Ericsson SA 2010
  3  *
  4  * License Terms: GNU General Public License v2
  5  *
  6  * Authors: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
  7  *
  8  * This file is based on drivers/regulator/ab8500.c
  9  *
 10  * AB8500 external regulators
 11  *
 12  * ab8500-ext supports the following regulators:
 13  * - VextSupply3
 14  */
 15 #include <linux/init.h>
 16 #include <linux/kernel.h>
 17 #include <linux/err.h>
 18 #include <linux/module.h>
 19 #include <linux/of.h>
 20 #include <linux/platform_device.h>
 21 #include <linux/regulator/driver.h>
 22 #include <linux/regulator/machine.h>
 23 #include <linux/regulator/of_regulator.h>
 24 #include <linux/mfd/abx500.h>
 25 #include <linux/mfd/abx500/ab8500.h>
 26 #include <linux/regulator/ab8500.h>
 27 
 28 static struct regulator_consumer_supply ab8500_vaux1_consumers[] = {
 29         /* Main display, u8500 R3 uib */
 30         REGULATOR_SUPPLY("vddi", "mcde_disp_sony_acx424akp.0"),
 31         /* Main display, u8500 uib and ST uib */
 32         REGULATOR_SUPPLY("vdd1", "samsung_s6d16d0.0"),
 33         /* Secondary display, ST uib */
 34         REGULATOR_SUPPLY("vdd1", "samsung_s6d16d0.1"),
 35         /* SFH7741 proximity sensor */
 36         REGULATOR_SUPPLY("vcc", "gpio-keys.0"),
 37         /* BH1780GLS ambient light sensor */
 38         REGULATOR_SUPPLY("vcc", "2-0029"),
 39         /* lsm303dlh accelerometer */
 40         REGULATOR_SUPPLY("vdd", "2-0018"),
 41         /* lsm303dlhc accelerometer */
 42         REGULATOR_SUPPLY("vdd", "2-0019"),
 43         /* lsm303dlh magnetometer */
 44         REGULATOR_SUPPLY("vdd", "2-001e"),
 45         /* Rohm BU21013 Touchscreen devices */
 46         REGULATOR_SUPPLY("avdd", "3-005c"),
 47         REGULATOR_SUPPLY("avdd", "3-005d"),
 48         /* Synaptics RMI4 Touchscreen device */
 49         REGULATOR_SUPPLY("vdd", "3-004b"),
 50         /* L3G4200D Gyroscope device */
 51         REGULATOR_SUPPLY("vdd", "2-0068"),
 52         /* Ambient light sensor device */
 53         REGULATOR_SUPPLY("vdd", "3-0029"),
 54         /* Pressure sensor device */
 55         REGULATOR_SUPPLY("vdd", "2-005c"),
 56         /* Cypress TrueTouch Touchscreen device */
 57         REGULATOR_SUPPLY("vcpin", "spi8.0"),
 58         /* Camera device */
 59         REGULATOR_SUPPLY("vaux12v5", "mmio_camera"),
 60 };
 61 
 62 static struct regulator_consumer_supply ab8500_vaux2_consumers[] = {
 63         /* On-board eMMC power */
 64         REGULATOR_SUPPLY("vmmc", "sdi4"),
 65         /* AB8500 audio codec */
 66         REGULATOR_SUPPLY("vcc-N2158", "ab8500-codec.0"),
 67         /* AB8500 accessory detect 1 */
 68         REGULATOR_SUPPLY("vcc-N2158", "ab8500-acc-det.0"),
 69         /* AB8500 Tv-out device */
 70         REGULATOR_SUPPLY("vcc-N2158", "mcde_tv_ab8500.4"),
 71         /* AV8100 HDMI device */
 72         REGULATOR_SUPPLY("vcc-N2158", "av8100_hdmi.3"),
 73 };
 74 
 75 static struct regulator_consumer_supply ab8500_vaux3_consumers[] = {
 76         REGULATOR_SUPPLY("v-SD-STM", "stm"),
 77         /* External MMC slot power */
 78         REGULATOR_SUPPLY("vmmc", "sdi0"),
 79 };
 80 
 81 static struct regulator_consumer_supply ab8500_vtvout_consumers[] = {
 82         /* TV-out DENC supply */
 83         REGULATOR_SUPPLY("vtvout", "ab8500-denc.0"),
 84         /* Internal general-purpose ADC */
 85         REGULATOR_SUPPLY("vddadc", "ab8500-gpadc.0"),
 86         /* ADC for charger */
 87         REGULATOR_SUPPLY("vddadc", "ab8500-charger.0"),
 88         /* AB8500 Tv-out device */
 89         REGULATOR_SUPPLY("vtvout", "mcde_tv_ab8500.4"),
 90 };
 91 
 92 static struct regulator_consumer_supply ab8500_vaud_consumers[] = {
 93         /* AB8500 audio-codec main supply */
 94         REGULATOR_SUPPLY("vaud", "ab8500-codec.0"),
 95 };
 96 
 97 static struct regulator_consumer_supply ab8500_vamic1_consumers[] = {
 98         /* AB8500 audio-codec Mic1 supply */
 99         REGULATOR_SUPPLY("vamic1", "ab8500-codec.0"),
100 };
101 
102 static struct regulator_consumer_supply ab8500_vamic2_consumers[] = {
103         /* AB8500 audio-codec Mic2 supply */
104         REGULATOR_SUPPLY("vamic2", "ab8500-codec.0"),
105 };
106 
107 static struct regulator_consumer_supply ab8500_vdmic_consumers[] = {
108         /* AB8500 audio-codec DMic supply */
109         REGULATOR_SUPPLY("vdmic", "ab8500-codec.0"),
110 };
111 
112 static struct regulator_consumer_supply ab8500_vintcore_consumers[] = {
113         /* SoC core supply, no device */
114         REGULATOR_SUPPLY("v-intcore", NULL),
115         /* USB Transceiver */
116         REGULATOR_SUPPLY("vddulpivio18", "ab8500-usb.0"),
117         /* Handled by abx500 clk driver */
118         REGULATOR_SUPPLY("v-intcore", "abx500-clk.0"),
119 };
120 
121 static struct regulator_consumer_supply ab8500_vana_consumers[] = {
122         /* DB8500 DSI */
123         REGULATOR_SUPPLY("vdddsi1v2", "mcde"),
124         REGULATOR_SUPPLY("vdddsi1v2", "b2r2_core"),
125         REGULATOR_SUPPLY("vdddsi1v2", "b2r2_1_core"),
126         REGULATOR_SUPPLY("vdddsi1v2", "dsilink.0"),
127         REGULATOR_SUPPLY("vdddsi1v2", "dsilink.1"),
128         REGULATOR_SUPPLY("vdddsi1v2", "dsilink.2"),
129         /* DB8500 CSI */
130         REGULATOR_SUPPLY("vddcsi1v2", "mmio_camera"),
131 };
132 
133 /* ab8500 regulator register initialization */
134 static struct ab8500_regulator_reg_init ab8500_reg_init[] = {
135         /*
136          * VanaRequestCtrl          = HP/LP depending on VxRequest
137          * VextSupply1RequestCtrl   = HP/LP depending on VxRequest
138          */
139         INIT_REGULATOR_REGISTER(AB8500_REGUREQUESTCTRL2,       0xf0, 0x00),
140         /*
141          * VextSupply2RequestCtrl   = HP/LP depending on VxRequest
142          * VextSupply3RequestCtrl   = HP/LP depending on VxRequest
143          * Vaux1RequestCtrl         = HP/LP depending on VxRequest
144          * Vaux2RequestCtrl         = HP/LP depending on VxRequest
145          */
146         INIT_REGULATOR_REGISTER(AB8500_REGUREQUESTCTRL3,       0xff, 0x00),
147         /*
148          * Vaux3RequestCtrl         = HP/LP depending on VxRequest
149          * SwHPReq                  = Control through SWValid disabled
150          */
151         INIT_REGULATOR_REGISTER(AB8500_REGUREQUESTCTRL4,       0x07, 0x00),
152         /*
153          * VanaSysClkReq1HPValid    = disabled
154          * Vaux1SysClkReq1HPValid   = disabled
155          * Vaux2SysClkReq1HPValid   = disabled
156          * Vaux3SysClkReq1HPValid   = disabled
157          */
158         INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQ1HPVALID1, 0xe8, 0x00),
159         /*
160          * VextSupply1SysClkReq1HPValid = disabled
161          * VextSupply2SysClkReq1HPValid = disabled
162          * VextSupply3SysClkReq1HPValid = SysClkReq1 controlled
163          */
164         INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQ1HPVALID2, 0x70, 0x40),
165         /*
166          * VanaHwHPReq1Valid        = disabled
167          * Vaux1HwHPreq1Valid       = disabled
168          * Vaux2HwHPReq1Valid       = disabled
169          * Vaux3HwHPReqValid        = disabled
170          */
171         INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ1VALID1,     0xe8, 0x00),
172         /*
173          * VextSupply1HwHPReq1Valid = disabled
174          * VextSupply2HwHPReq1Valid = disabled
175          * VextSupply3HwHPReq1Valid = disabled
176          */
177         INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ1VALID2,     0x07, 0x00),
178         /*
179          * VanaHwHPReq2Valid        = disabled
180          * Vaux1HwHPReq2Valid       = disabled
181          * Vaux2HwHPReq2Valid       = disabled
182          * Vaux3HwHPReq2Valid       = disabled
183          */
184         INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ2VALID1,     0xe8, 0x00),
185         /*
186          * VextSupply1HwHPReq2Valid = disabled
187          * VextSupply2HwHPReq2Valid = disabled
188          * VextSupply3HwHPReq2Valid = HWReq2 controlled
189          */
190         INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ2VALID2,     0x07, 0x04),
191         /*
192          * VanaSwHPReqValid         = disabled
193          * Vaux1SwHPReqValid        = disabled
194          */
195         INIT_REGULATOR_REGISTER(AB8500_REGUSWHPREQVALID1,      0xa0, 0x00),
196         /*
197          * Vaux2SwHPReqValid        = disabled
198          * Vaux3SwHPReqValid        = disabled
199          * VextSupply1SwHPReqValid  = disabled
200          * VextSupply2SwHPReqValid  = disabled
201          * VextSupply3SwHPReqValid  = disabled
202          */
203         INIT_REGULATOR_REGISTER(AB8500_REGUSWHPREQVALID2,      0x1f, 0x00),
204         /*
205          * SysClkReq2Valid1         = SysClkReq2 controlled
206          * SysClkReq3Valid1         = disabled
207          * SysClkReq4Valid1         = SysClkReq4 controlled
208          * SysClkReq5Valid1         = disabled
209          * SysClkReq6Valid1         = SysClkReq6 controlled
210          * SysClkReq7Valid1         = disabled
211          * SysClkReq8Valid1         = disabled
212          */
213         INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQVALID1,    0xfe, 0x2a),
214         /*
215          * SysClkReq2Valid2         = disabled
216          * SysClkReq3Valid2         = disabled
217          * SysClkReq4Valid2         = disabled
218          * SysClkReq5Valid2         = disabled
219          * SysClkReq6Valid2         = SysClkReq6 controlled
220          * SysClkReq7Valid2         = disabled
221          * SysClkReq8Valid2         = disabled
222          */
223         INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQVALID2,    0xfe, 0x20),
224         /*
225          * VTVoutEna                = disabled
226          * Vintcore12Ena            = disabled
227          * Vintcore12Sel            = 1.25 V
228          * Vintcore12LP             = inactive (HP)
229          * VTVoutLP                 = inactive (HP)
230          */
231         INIT_REGULATOR_REGISTER(AB8500_REGUMISC1,              0xfe, 0x10),
232         /*
233          * VaudioEna                = disabled
234          * VdmicEna                 = disabled
235          * Vamic1Ena                = disabled
236          * Vamic2Ena                = disabled
237          */
238         INIT_REGULATOR_REGISTER(AB8500_VAUDIOSUPPLY,           0x1e, 0x00),
239         /*
240          * Vamic1_dzout             = high-Z when Vamic1 is disabled
241          * Vamic2_dzout             = high-Z when Vamic2 is disabled
242          */
243         INIT_REGULATOR_REGISTER(AB8500_REGUCTRL1VAMIC,         0x03, 0x00),
244         /*
245          * VPll                     = Hw controlled (NOTE! PRCMU bits)
246          * VanaRegu                 = force off
247          */
248         INIT_REGULATOR_REGISTER(AB8500_VPLLVANAREGU,           0x0f, 0x02),
249         /*
250          * VrefDDREna               = disabled
251          * VrefDDRSleepMode         = inactive (no pulldown)
252          */
253         INIT_REGULATOR_REGISTER(AB8500_VREFDDR,                0x03, 0x00),
254         /*
255          * VextSupply1Regu          = force LP
256          * VextSupply2Regu          = force OFF
257          * VextSupply3Regu          = force HP (-> STBB2=LP and TPS=LP)
258          * ExtSupply2Bypass         = ExtSupply12LPn ball is 0 when Ena is 0
259          * ExtSupply3Bypass         = ExtSupply3LPn ball is 0 when Ena is 0
260          */
261         INIT_REGULATOR_REGISTER(AB8500_EXTSUPPLYREGU,          0xff, 0x13),
262         /*
263          * Vaux1Regu                = force HP
264          * Vaux2Regu                = force off
265          */
266         INIT_REGULATOR_REGISTER(AB8500_VAUX12REGU,             0x0f, 0x01),
267         /*
268          * Vaux3Regu                = force off
269          */
270         INIT_REGULATOR_REGISTER(AB8500_VRF1VAUX3REGU,          0x03, 0x00),
271         /*
272          * Vaux1Sel                 = 2.8 V
273          */
274         INIT_REGULATOR_REGISTER(AB8500_VAUX1SEL,               0x0f, 0x0C),
275         /*
276          * Vaux2Sel                 = 2.9 V
277          */
278         INIT_REGULATOR_REGISTER(AB8500_VAUX2SEL,               0x0f, 0x0d),
279         /*
280          * Vaux3Sel                 = 2.91 V
281          */
282         INIT_REGULATOR_REGISTER(AB8500_VRF1VAUX3SEL,           0x07, 0x07),
283         /*
284          * VextSupply12LP           = disabled (no LP)
285          */
286         INIT_REGULATOR_REGISTER(AB8500_REGUCTRL2SPARE,         0x01, 0x00),
287         /*
288          * Vaux1Disch               = short discharge time
289          * Vaux2Disch               = short discharge time
290          * Vaux3Disch               = short discharge time
291          * Vintcore12Disch          = short discharge time
292          * VTVoutDisch              = short discharge time
293          * VaudioDisch              = short discharge time
294          */
295         INIT_REGULATOR_REGISTER(AB8500_REGUCTRLDISCH,          0xfc, 0x00),
296         /*
297          * VanaDisch                = short discharge time
298          * VdmicPullDownEna         = pulldown disabled when Vdmic is disabled
299          * VdmicDisch               = short discharge time
300          */
301         INIT_REGULATOR_REGISTER(AB8500_REGUCTRLDISCH2,         0x16, 0x00),
302 };
303 
304 /* AB8500 regulators */
305 static struct regulator_init_data ab8500_regulators[AB8500_NUM_REGULATORS] = {
306         /* supplies to the display/camera */
307         [AB8500_LDO_AUX1] = {
308                 .supply_regulator = "ab8500-ext-supply3",
309                 .constraints = {
310                         .name = "V-DISPLAY",
311                         .min_uV = 2800000,
312                         .max_uV = 3300000,
313                         .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
314                                           REGULATOR_CHANGE_STATUS,
315                         .boot_on = 1, /* display is on at boot */
316                 },
317                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaux1_consumers),
318                 .consumer_supplies = ab8500_vaux1_consumers,
319         },
320         /* supplies to the on-board eMMC */
321         [AB8500_LDO_AUX2] = {
322                 .supply_regulator = "ab8500-ext-supply3",
323                 .constraints = {
324                         .name = "V-eMMC1",
325                         .min_uV = 1100000,
326                         .max_uV = 3300000,
327                         .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
328                                           REGULATOR_CHANGE_STATUS |
329                                           REGULATOR_CHANGE_MODE,
330                         .valid_modes_mask = REGULATOR_MODE_NORMAL |
331                                             REGULATOR_MODE_IDLE,
332                 },
333                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaux2_consumers),
334                 .consumer_supplies = ab8500_vaux2_consumers,
335         },
336         /* supply for VAUX3, supplies to SDcard slots */
337         [AB8500_LDO_AUX3] = {
338                 .supply_regulator = "ab8500-ext-supply3",
339                 .constraints = {
340                         .name = "V-MMC-SD",
341                         .min_uV = 1100000,
342                         .max_uV = 3300000,
343                         .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
344                                           REGULATOR_CHANGE_STATUS |
345                                           REGULATOR_CHANGE_MODE,
346                         .valid_modes_mask = REGULATOR_MODE_NORMAL |
347                                             REGULATOR_MODE_IDLE,
348                 },
349                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaux3_consumers),
350                 .consumer_supplies = ab8500_vaux3_consumers,
351         },
352         /* supply for tvout, gpadc, TVOUT LDO */
353         [AB8500_LDO_TVOUT] = {
354                 .constraints = {
355                         .name = "V-TVOUT",
356                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
357                 },
358                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vtvout_consumers),
359                 .consumer_supplies = ab8500_vtvout_consumers,
360         },
361         /* supply for ab8500-vaudio, VAUDIO LDO */
362         [AB8500_LDO_AUDIO] = {
363                 .constraints = {
364                         .name = "V-AUD",
365                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
366                 },
367                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaud_consumers),
368                 .consumer_supplies = ab8500_vaud_consumers,
369         },
370         /* supply for v-anamic1 VAMic1-LDO */
371         [AB8500_LDO_ANAMIC1] = {
372                 .constraints = {
373                         .name = "V-AMIC1",
374                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
375                 },
376                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vamic1_consumers),
377                 .consumer_supplies = ab8500_vamic1_consumers,
378         },
379         /* supply for v-amic2, VAMIC2 LDO, reuse constants for AMIC1 */
380         [AB8500_LDO_ANAMIC2] = {
381                 .constraints = {
382                         .name = "V-AMIC2",
383                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
384                 },
385                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vamic2_consumers),
386                 .consumer_supplies = ab8500_vamic2_consumers,
387         },
388         /* supply for v-dmic, VDMIC LDO */
389         [AB8500_LDO_DMIC] = {
390                 .constraints = {
391                         .name = "V-DMIC",
392                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
393                 },
394                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vdmic_consumers),
395                 .consumer_supplies = ab8500_vdmic_consumers,
396         },
397         /* supply for v-intcore12, VINTCORE12 LDO */
398         [AB8500_LDO_INTCORE] = {
399                 .constraints = {
400                         .name = "V-INTCORE",
401                         .min_uV = 1250000,
402                         .max_uV = 1350000,
403                         .input_uV = 1800000,
404                         .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
405                                           REGULATOR_CHANGE_STATUS |
406                                           REGULATOR_CHANGE_MODE |
407                                           REGULATOR_CHANGE_DRMS,
408                         .valid_modes_mask = REGULATOR_MODE_NORMAL |
409                                             REGULATOR_MODE_IDLE,
410                 },
411                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vintcore_consumers),
412                 .consumer_supplies = ab8500_vintcore_consumers,
413         },
414         /* supply for U8500 CSI-DSI, VANA LDO */
415         [AB8500_LDO_ANA] = {
416                 .constraints = {
417                         .name = "V-CSI-DSI",
418                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
419                 },
420                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vana_consumers),
421                 .consumer_supplies = ab8500_vana_consumers,
422         },
423 };
424 
425 /* supply for VextSupply3 */
426 static struct regulator_consumer_supply ab8500_ext_supply3_consumers[] = {
427         /* SIM supply for 3 V SIM cards */
428         REGULATOR_SUPPLY("vinvsim", "sim-detect.0"),
429 };
430 
431 /*
432  * AB8500 external regulators
433  */
434 static struct regulator_init_data ab8500_ext_regulators[] = {
435         /* fixed Vbat supplies VSMPS1_EXT_1V8 */
436         [AB8500_EXT_SUPPLY1] = {
437                 .constraints = {
438                         .name = "ab8500-ext-supply1",
439                         .min_uV = 1800000,
440                         .max_uV = 1800000,
441                         .initial_mode = REGULATOR_MODE_IDLE,
442                         .boot_on = 1,
443                         .always_on = 1,
444                 },
445         },
446         /* fixed Vbat supplies VSMPS2_EXT_1V36 and VSMPS5_EXT_1V15 */
447         [AB8500_EXT_SUPPLY2] = {
448                 .constraints = {
449                         .name = "ab8500-ext-supply2",
450                         .min_uV = 1360000,
451                         .max_uV = 1360000,
452                 },
453         },
454         /* fixed Vbat supplies VSMPS3_EXT_3V4 and VSMPS4_EXT_3V4 */
455         [AB8500_EXT_SUPPLY3] = {
456                 .constraints = {
457                         .name = "ab8500-ext-supply3",
458                         .min_uV = 3400000,
459                         .max_uV = 3400000,
460                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
461                         .boot_on = 1,
462                 },
463                 .num_consumer_supplies =
464                         ARRAY_SIZE(ab8500_ext_supply3_consumers),
465                 .consumer_supplies = ab8500_ext_supply3_consumers,
466         },
467 };
468 
469 static struct ab8500_regulator_platform_data ab8500_regulator_plat_data = {
470         .reg_init               = ab8500_reg_init,
471         .num_reg_init           = ARRAY_SIZE(ab8500_reg_init),
472         .regulator              = ab8500_regulators,
473         .num_regulator          = ARRAY_SIZE(ab8500_regulators),
474         .ext_regulator          = ab8500_ext_regulators,
475         .num_ext_regulator      = ARRAY_SIZE(ab8500_ext_regulators),
476 };
477 
478 /**
479  * struct ab8500_ext_regulator_info - ab8500 regulator information
480  * @dev: device pointer
481  * @desc: regulator description
482  * @rdev: regulator device
483  * @cfg: regulator configuration (extension of regulator FW configuration)
484  * @update_bank: bank to control on/off
485  * @update_reg: register to control on/off
486  * @update_mask: mask to enable/disable and set mode of regulator
487  * @update_val: bits holding the regulator current mode
488  * @update_val_hp: bits to set EN pin active (LPn pin deactive)
489  *                 normally this means high power mode
490  * @update_val_lp: bits to set EN pin active and LPn pin active
491  *                 normally this means low power mode
492  * @update_val_hw: bits to set regulator pins in HW control
493  *                 SysClkReq pins and logic will choose mode
494  */
495 struct ab8500_ext_regulator_info {
496         struct device *dev;
497         struct regulator_desc desc;
498         struct regulator_dev *rdev;
499         struct ab8500_ext_regulator_cfg *cfg;
500         u8 update_bank;
501         u8 update_reg;
502         u8 update_mask;
503         u8 update_val;
504         u8 update_val_hp;
505         u8 update_val_lp;
506         u8 update_val_hw;
507 };
508 
509 static int ab8500_ext_regulator_enable(struct regulator_dev *rdev)
510 {
511         int ret;
512         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
513         u8 regval;
514 
515         if (info == NULL) {
516                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
517                 return -EINVAL;
518         }
519 
520         /*
521          * To satisfy both HW high power request and SW request, the regulator
522          * must be on in high power.
523          */
524         if (info->cfg && info->cfg->hwreq)
525                 regval = info->update_val_hp;
526         else
527                 regval = info->update_val;
528 
529         ret = abx500_mask_and_set_register_interruptible(info->dev,
530                 info->update_bank, info->update_reg,
531                 info->update_mask, regval);
532         if (ret < 0) {
533                 dev_err(rdev_get_dev(info->rdev),
534                         "couldn't set enable bits for regulator\n");
535                 return ret;
536         }
537 
538         dev_dbg(rdev_get_dev(rdev),
539                 "%s-enable (bank, reg, mask, value): 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
540                 info->desc.name, info->update_bank, info->update_reg,
541                 info->update_mask, regval);
542 
543         return 0;
544 }
545 
546 static int ab8500_ext_regulator_disable(struct regulator_dev *rdev)
547 {
548         int ret;
549         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
550         u8 regval;
551 
552         if (info == NULL) {
553                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
554                 return -EINVAL;
555         }
556 
557         /*
558          * Set the regulator in HW request mode if configured
559          */
560         if (info->cfg && info->cfg->hwreq)
561                 regval = info->update_val_hw;
562         else
563                 regval = 0;
564 
565         ret = abx500_mask_and_set_register_interruptible(info->dev,
566                 info->update_bank, info->update_reg,
567                 info->update_mask, regval);
568         if (ret < 0) {
569                 dev_err(rdev_get_dev(info->rdev),
570                         "couldn't set disable bits for regulator\n");
571                 return ret;
572         }
573 
574         dev_dbg(rdev_get_dev(rdev), "%s-disable (bank, reg, mask, value):"
575                 " 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
576                 info->desc.name, info->update_bank, info->update_reg,
577                 info->update_mask, regval);
578 
579         return 0;
580 }
581 
582 static int ab8500_ext_regulator_is_enabled(struct regulator_dev *rdev)
583 {
584         int ret;
585         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
586         u8 regval;
587 
588         if (info == NULL) {
589                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
590                 return -EINVAL;
591         }
592 
593         ret = abx500_get_register_interruptible(info->dev,
594                 info->update_bank, info->update_reg, &regval);
595         if (ret < 0) {
596                 dev_err(rdev_get_dev(rdev),
597                         "couldn't read 0x%x register\n", info->update_reg);
598                 return ret;
599         }
600 
601         dev_dbg(rdev_get_dev(rdev), "%s-is_enabled (bank, reg, mask, value):"
602                 " 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
603                 info->desc.name, info->update_bank, info->update_reg,
604                 info->update_mask, regval);
605 
606         if (((regval & info->update_mask) == info->update_val_lp) ||
607             ((regval & info->update_mask) == info->update_val_hp))
608                 return 1;
609         else
610                 return 0;
611 }
612 
613 static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
614                                          unsigned int mode)
615 {
616         int ret = 0;
617         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
618         u8 regval;
619 
620         if (info == NULL) {
621                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
622                 return -EINVAL;
623         }
624 
625         switch (mode) {
626         case REGULATOR_MODE_NORMAL:
627                 regval = info->update_val_hp;
628                 break;
629         case REGULATOR_MODE_IDLE:
630                 regval = info->update_val_lp;
631                 break;
632 
633         default:
634                 return -EINVAL;
635         }
636 
637         /* If regulator is enabled and info->cfg->hwreq is set, the regulator
638            must be on in high power, so we don't need to write the register with
639            the same value.
640          */
641         if (ab8500_ext_regulator_is_enabled(rdev) &&
642             !(info->cfg && info->cfg->hwreq)) {
643                 ret = abx500_mask_and_set_register_interruptible(info->dev,
644                                         info->update_bank, info->update_reg,
645                                         info->update_mask, regval);
646                 if (ret < 0) {
647                         dev_err(rdev_get_dev(rdev),
648                                 "Could not set regulator mode.\n");
649                         return ret;
650                 }
651 
652                 dev_dbg(rdev_get_dev(rdev),
653                         "%s-set_mode (bank, reg, mask, value): "
654                         "0x%x, 0x%x, 0x%x, 0x%x\n",
655                         info->desc.name, info->update_bank, info->update_reg,
656                         info->update_mask, regval);
657         }
658 
659         info->update_val = regval;
660 
661         return 0;
662 }
663 
664 static unsigned int ab8500_ext_regulator_get_mode(struct regulator_dev *rdev)
665 {
666         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
667         int ret;
668 
669         if (info == NULL) {
670                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
671                 return -EINVAL;
672         }
673 
674         if (info->update_val == info->update_val_hp)
675                 ret = REGULATOR_MODE_NORMAL;
676         else if (info->update_val == info->update_val_lp)
677                 ret = REGULATOR_MODE_IDLE;
678         else
679                 ret = -EINVAL;
680 
681         return ret;
682 }
683 
684 static int ab8500_ext_set_voltage(struct regulator_dev *rdev, int min_uV,
685                                   int max_uV, unsigned *selector)
686 {
687         struct regulation_constraints *regu_constraints = rdev->constraints;
688 
689         if (!regu_constraints) {
690                 dev_err(rdev_get_dev(rdev), "No regulator constraints\n");
691                 return -EINVAL;
692         }
693 
694         if (regu_constraints->min_uV == min_uV &&
695             regu_constraints->max_uV == max_uV)
696                 return 0;
697 
698         dev_err(rdev_get_dev(rdev),
699                 "Requested min %duV max %duV != constrained min %duV max %duV\n",
700                 min_uV, max_uV,
701                 regu_constraints->min_uV, regu_constraints->max_uV);
702 
703         return -EINVAL;
704 }
705 
706 static int ab8500_ext_list_voltage(struct regulator_dev *rdev,
707                                    unsigned selector)
708 {
709         struct regulation_constraints *regu_constraints = rdev->constraints;
710 
711         if (regu_constraints == NULL) {
712                 dev_err(rdev_get_dev(rdev), "regulator constraints null pointer\n");
713                 return -EINVAL;
714         }
715         /* return the uV for the fixed regulators */
716         if (regu_constraints->min_uV && regu_constraints->max_uV) {
717                 if (regu_constraints->min_uV == regu_constraints->max_uV)
718                         return regu_constraints->min_uV;
719         }
720         return -EINVAL;
721 }
722 
723 static struct regulator_ops ab8500_ext_regulator_ops = {
724         .enable                 = ab8500_ext_regulator_enable,
725         .disable                = ab8500_ext_regulator_disable,
726         .is_enabled             = ab8500_ext_regulator_is_enabled,
727         .set_mode               = ab8500_ext_regulator_set_mode,
728         .get_mode               = ab8500_ext_regulator_get_mode,
729         .set_voltage            = ab8500_ext_set_voltage,
730         .list_voltage           = ab8500_ext_list_voltage,
731 };
732 
733 static struct ab8500_ext_regulator_info
734                 ab8500_ext_regulator_info[AB8500_NUM_EXT_REGULATORS] = {
735         [AB8500_EXT_SUPPLY1] = {
736                 .desc = {
737                         .name           = "VEXTSUPPLY1",
738                         .ops            = &ab8500_ext_regulator_ops,
739                         .type           = REGULATOR_VOLTAGE,
740                         .id             = AB8500_EXT_SUPPLY1,
741                         .owner          = THIS_MODULE,
742                         .n_voltages     = 1,
743                 },
744                 .update_bank            = 0x04,
745                 .update_reg             = 0x08,
746                 .update_mask            = 0x03,
747                 .update_val             = 0x01,
748                 .update_val_hp          = 0x01,
749                 .update_val_lp          = 0x03,
750                 .update_val_hw          = 0x02,
751         },
752         [AB8500_EXT_SUPPLY2] = {
753                 .desc = {
754                         .name           = "VEXTSUPPLY2",
755                         .ops            = &ab8500_ext_regulator_ops,
756                         .type           = REGULATOR_VOLTAGE,
757                         .id             = AB8500_EXT_SUPPLY2,
758                         .owner          = THIS_MODULE,
759                         .n_voltages     = 1,
760                 },
761                 .update_bank            = 0x04,
762                 .update_reg             = 0x08,
763                 .update_mask            = 0x0c,
764                 .update_val             = 0x04,
765                 .update_val_hp          = 0x04,
766                 .update_val_lp          = 0x0c,
767                 .update_val_hw          = 0x08,
768         },
769         [AB8500_EXT_SUPPLY3] = {
770                 .desc = {
771                         .name           = "VEXTSUPPLY3",
772                         .ops            = &ab8500_ext_regulator_ops,
773                         .type           = REGULATOR_VOLTAGE,
774                         .id             = AB8500_EXT_SUPPLY3,
775                         .owner          = THIS_MODULE,
776                         .n_voltages     = 1,
777                 },
778                 .update_bank            = 0x04,
779                 .update_reg             = 0x08,
780                 .update_mask            = 0x30,
781                 .update_val             = 0x10,
782                 .update_val_hp          = 0x10,
783                 .update_val_lp          = 0x30,
784                 .update_val_hw          = 0x20,
785         },
786 };
787 
788 static struct of_regulator_match ab8500_ext_regulator_match[] = {
789         { .name = "ab8500_ext1", .driver_data = (void *) AB8500_EXT_SUPPLY1, },
790         { .name = "ab8500_ext2", .driver_data = (void *) AB8500_EXT_SUPPLY2, },
791         { .name = "ab8500_ext3", .driver_data = (void *) AB8500_EXT_SUPPLY3, },
792 };
793 
794 static int ab8500_ext_regulator_probe(struct platform_device *pdev)
795 {
796         struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
797         struct ab8500_regulator_platform_data *pdata = &ab8500_regulator_plat_data;
798         struct device_node *np = pdev->dev.of_node;
799         struct regulator_config config = { };
800         int i, err;
801 
802         if (np) {
803                 err = of_regulator_match(&pdev->dev, np,
804                                          ab8500_ext_regulator_match,
805                                          ARRAY_SIZE(ab8500_ext_regulator_match));
806                 if (err < 0) {
807                         dev_err(&pdev->dev,
808                                 "Error parsing regulator init data: %d\n", err);
809                         return err;
810                 }
811         }
812 
813         if (!ab8500) {
814                 dev_err(&pdev->dev, "null mfd parent\n");
815                 return -EINVAL;
816         }
817 
818         /* make sure the platform data has the correct size */
819         if (pdata->num_ext_regulator != ARRAY_SIZE(ab8500_ext_regulator_info)) {
820                 dev_err(&pdev->dev, "Configuration error: size mismatch.\n");
821                 return -EINVAL;
822         }
823 
824         /* check for AB8500 2.x */
825         if (is_ab8500_2p0_or_earlier(ab8500)) {
826                 struct ab8500_ext_regulator_info *info;
827 
828                 /* VextSupply3LPn is inverted on AB8500 2.x */
829                 info = &ab8500_ext_regulator_info[AB8500_EXT_SUPPLY3];
830                 info->update_val = 0x30;
831                 info->update_val_hp = 0x30;
832                 info->update_val_lp = 0x10;
833         }
834 
835         /* register all regulators */
836         for (i = 0; i < ARRAY_SIZE(ab8500_ext_regulator_info); i++) {
837                 struct ab8500_ext_regulator_info *info = NULL;
838 
839                 /* assign per-regulator data */
840                 info = &ab8500_ext_regulator_info[i];
841                 info->dev = &pdev->dev;
842                 info->cfg = (struct ab8500_ext_regulator_cfg *)
843                         pdata->ext_regulator[i].driver_data;
844 
845                 config.dev = &pdev->dev;
846                 config.driver_data = info;
847                 config.of_node = ab8500_ext_regulator_match[i].of_node;
848                 config.init_data = (np) ?
849                         ab8500_ext_regulator_match[i].init_data :
850                         &pdata->ext_regulator[i];
851 
852                 /* register regulator with framework */
853                 info->rdev = devm_regulator_register(&pdev->dev, &info->desc,
854                                                      &config);
855                 if (IS_ERR(info->rdev)) {
856                         err = PTR_ERR(info->rdev);
857                         dev_err(&pdev->dev, "failed to register regulator %s\n",
858                                         info->desc.name);
859                         return err;
860                 }
861 
862                 dev_dbg(rdev_get_dev(info->rdev),
863                         "%s-probed\n", info->desc.name);
864         }
865 
866         return 0;
867 }
868 
869 static struct platform_driver ab8500_ext_regulator_driver = {
870         .probe = ab8500_ext_regulator_probe,
871         .driver         = {
872                 .name   = "ab8500-ext-regulator",
873         },
874 };
875 
876 static int __init ab8500_ext_regulator_init(void)
877 {
878         int ret;
879 
880         ret = platform_driver_register(&ab8500_ext_regulator_driver);
881         if (ret)
882                 pr_err("Failed to register ab8500 ext regulator: %d\n", ret);
883 
884         return ret;
885 }
886 subsys_initcall(ab8500_ext_regulator_init);
887 
888 static void __exit ab8500_ext_regulator_exit(void)
889 {
890         platform_driver_unregister(&ab8500_ext_regulator_driver);
891 }
892 module_exit(ab8500_ext_regulator_exit);
893 
894 MODULE_LICENSE("GPL v2");
895 MODULE_AUTHOR("Bengt Jonsson <bengt.g.jonsson@stericsson.com>");
896 MODULE_DESCRIPTION("AB8500 external regulator driver");
897 MODULE_ALIAS("platform:ab8500-ext-regulator");
898 

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