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David Brownellfa16a5c2009-02-08 10:37:06 -08001/*
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +01002 * twl-regulator.c -- support regulators in twl4030/twl6030 family chips
David Brownellfa16a5c2009-02-08 10:37:06 -08003 *
4 * Copyright (C) 2008 David Brownell
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/err.h>
Juha Keski-Saari53b8a9d2009-12-16 14:55:26 +020015#include <linux/delay.h>
David Brownellfa16a5c2009-02-08 10:37:06 -080016#include <linux/platform_device.h>
17#include <linux/regulator/driver.h>
18#include <linux/regulator/machine.h>
Santosh Shilimkarb07682b2009-12-13 20:05:51 +010019#include <linux/i2c/twl.h>
David Brownellfa16a5c2009-02-08 10:37:06 -080020
21
22/*
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +010023 * The TWL4030/TW5030/TPS659x0/TWL6030 family chips include power management, a
David Brownellfa16a5c2009-02-08 10:37:06 -080024 * USB OTG transceiver, an RTC, ADC, PWM, and lots more. Some versions
25 * include an audio codec, battery charger, and more voltage regulators.
26 * These chips are often used in OMAP-based systems.
27 *
28 * This driver implements software-based resource control for various
29 * voltage regulators. This is usually augmented with state machine
30 * based control.
31 */
32
33struct twlreg_info {
34 /* start of regulator's PM_RECEIVER control register bank */
35 u8 base;
36
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +010037 /* twl resource ID, for resource control state machine */
David Brownellfa16a5c2009-02-08 10:37:06 -080038 u8 id;
39
40 /* voltage in mV = table[VSEL]; table_len must be a power-of-two */
41 u8 table_len;
42 const u16 *table;
43
Juha Keski-Saari045f9722009-12-16 14:49:52 +020044 /* regulator specific turn-on delay */
45 u16 delay;
46
47 /* State REMAP default configuration */
48 u8 remap;
49
David Brownellfa16a5c2009-02-08 10:37:06 -080050 /* chip constraints on regulator behavior */
51 u16 min_mV;
David Brownellfa16a5c2009-02-08 10:37:06 -080052
53 /* used by regulator core */
54 struct regulator_desc desc;
55};
56
57
58/* LDO control registers ... offset is from the base of its register bank.
59 * The first three registers of all power resource banks help hardware to
60 * manage the various resource groups.
61 */
Rajendra Nayak441a4502009-12-13 22:19:23 +010062/* Common offset in TWL4030/6030 */
David Brownellfa16a5c2009-02-08 10:37:06 -080063#define VREG_GRP 0
Rajendra Nayak441a4502009-12-13 22:19:23 +010064/* TWL4030 register offsets */
David Brownellfa16a5c2009-02-08 10:37:06 -080065#define VREG_TYPE 1
66#define VREG_REMAP 2
67#define VREG_DEDICATED 3 /* LDO control */
Rajendra Nayak441a4502009-12-13 22:19:23 +010068/* TWL6030 register offsets */
69#define VREG_TRANS 1
70#define VREG_STATE 2
71#define VREG_VOLTAGE 3
72/* TWL6030 Misc register offsets */
73#define VREG_BC_ALL 1
74#define VREG_BC_REF 2
75#define VREG_BC_PROC 3
76#define VREG_BC_CLK_RST 4
David Brownellfa16a5c2009-02-08 10:37:06 -080077
78static inline int
Rajendra Nayak441a4502009-12-13 22:19:23 +010079twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
David Brownellfa16a5c2009-02-08 10:37:06 -080080{
81 u8 value;
82 int status;
83
Rajendra Nayak441a4502009-12-13 22:19:23 +010084 status = twl_i2c_read_u8(slave_subgp,
David Brownellfa16a5c2009-02-08 10:37:06 -080085 &value, info->base + offset);
86 return (status < 0) ? status : value;
87}
88
89static inline int
Rajendra Nayak441a4502009-12-13 22:19:23 +010090twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
91 u8 value)
David Brownellfa16a5c2009-02-08 10:37:06 -080092{
Rajendra Nayak441a4502009-12-13 22:19:23 +010093 return twl_i2c_write_u8(slave_subgp,
David Brownellfa16a5c2009-02-08 10:37:06 -080094 value, info->base + offset);
95}
96
97/*----------------------------------------------------------------------*/
98
99/* generic power resource operations, which work on all regulators */
100
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100101static int twlreg_grp(struct regulator_dev *rdev)
David Brownellfa16a5c2009-02-08 10:37:06 -0800102{
Rajendra Nayak441a4502009-12-13 22:19:23 +0100103 return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
104 VREG_GRP);
David Brownellfa16a5c2009-02-08 10:37:06 -0800105}
106
107/*
108 * Enable/disable regulators by joining/leaving the P1 (processor) group.
109 * We assume nobody else is updating the DEV_GRP registers.
110 */
Rajendra Nayak441a4502009-12-13 22:19:23 +0100111/* definition for 4030 family */
112#define P3_GRP_4030 BIT(7) /* "peripherals" */
113#define P2_GRP_4030 BIT(6) /* secondary processor, modem, etc */
114#define P1_GRP_4030 BIT(5) /* CPU/Linux */
115/* definition for 6030 family */
116#define P3_GRP_6030 BIT(2) /* secondary processor, modem, etc */
117#define P2_GRP_6030 BIT(1) /* "peripherals" */
118#define P1_GRP_6030 BIT(0) /* CPU/Linux */
David Brownellfa16a5c2009-02-08 10:37:06 -0800119
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100120static int twlreg_is_enabled(struct regulator_dev *rdev)
David Brownellfa16a5c2009-02-08 10:37:06 -0800121{
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100122 int state = twlreg_grp(rdev);
David Brownellfa16a5c2009-02-08 10:37:06 -0800123
124 if (state < 0)
125 return state;
126
Rajendra Nayak441a4502009-12-13 22:19:23 +0100127 if (twl_class_is_4030())
128 state &= P1_GRP_4030;
129 else
130 state &= P1_GRP_6030;
131 return state;
David Brownellfa16a5c2009-02-08 10:37:06 -0800132}
133
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100134static int twlreg_enable(struct regulator_dev *rdev)
David Brownellfa16a5c2009-02-08 10:37:06 -0800135{
136 struct twlreg_info *info = rdev_get_drvdata(rdev);
137 int grp;
Juha Keski-Saari53b8a9d2009-12-16 14:55:26 +0200138 int ret;
David Brownellfa16a5c2009-02-08 10:37:06 -0800139
Rajendra Nayak441a4502009-12-13 22:19:23 +0100140 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
David Brownellfa16a5c2009-02-08 10:37:06 -0800141 if (grp < 0)
142 return grp;
143
Rajendra Nayak441a4502009-12-13 22:19:23 +0100144 if (twl_class_is_4030())
145 grp |= P1_GRP_4030;
146 else
147 grp |= P1_GRP_6030;
148
Juha Keski-Saari53b8a9d2009-12-16 14:55:26 +0200149 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
150
151 udelay(info->delay);
152
153 return ret;
David Brownellfa16a5c2009-02-08 10:37:06 -0800154}
155
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100156static int twlreg_disable(struct regulator_dev *rdev)
David Brownellfa16a5c2009-02-08 10:37:06 -0800157{
158 struct twlreg_info *info = rdev_get_drvdata(rdev);
159 int grp;
160
Rajendra Nayak441a4502009-12-13 22:19:23 +0100161 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
David Brownellfa16a5c2009-02-08 10:37:06 -0800162 if (grp < 0)
163 return grp;
164
Rajendra Nayak441a4502009-12-13 22:19:23 +0100165 if (twl_class_is_4030())
Juha Keski-Saaricf9836f2009-12-16 15:28:00 +0200166 grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);
Rajendra Nayak441a4502009-12-13 22:19:23 +0100167 else
Juha Keski-Saaricf9836f2009-12-16 15:28:00 +0200168 grp &= ~(P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030);
Rajendra Nayak441a4502009-12-13 22:19:23 +0100169
170 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
David Brownellfa16a5c2009-02-08 10:37:06 -0800171}
172
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100173static int twlreg_get_status(struct regulator_dev *rdev)
David Brownellfa16a5c2009-02-08 10:37:06 -0800174{
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100175 int state = twlreg_grp(rdev);
David Brownellfa16a5c2009-02-08 10:37:06 -0800176
Rajendra Nayak441a4502009-12-13 22:19:23 +0100177 if (twl_class_is_6030())
178 return 0; /* FIXME return for 6030 regulator */
179
David Brownellfa16a5c2009-02-08 10:37:06 -0800180 if (state < 0)
181 return state;
182 state &= 0x0f;
183
184 /* assume state != WARM_RESET; we'd not be running... */
185 if (!state)
186 return REGULATOR_STATUS_OFF;
187 return (state & BIT(3))
188 ? REGULATOR_STATUS_NORMAL
189 : REGULATOR_STATUS_STANDBY;
190}
191
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100192static int twlreg_set_mode(struct regulator_dev *rdev, unsigned mode)
David Brownellfa16a5c2009-02-08 10:37:06 -0800193{
194 struct twlreg_info *info = rdev_get_drvdata(rdev);
195 unsigned message;
196 int status;
197
Rajendra Nayak441a4502009-12-13 22:19:23 +0100198 if (twl_class_is_6030())
199 return 0; /* FIXME return for 6030 regulator */
200
David Brownellfa16a5c2009-02-08 10:37:06 -0800201 /* We can only set the mode through state machine commands... */
202 switch (mode) {
203 case REGULATOR_MODE_NORMAL:
204 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
205 break;
206 case REGULATOR_MODE_STANDBY:
207 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
208 break;
209 default:
210 return -EINVAL;
211 }
212
213 /* Ensure the resource is associated with some group */
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100214 status = twlreg_grp(rdev);
David Brownellfa16a5c2009-02-08 10:37:06 -0800215 if (status < 0)
216 return status;
Rajendra Nayak441a4502009-12-13 22:19:23 +0100217 if (!(status & (P3_GRP_4030 | P2_GRP_4030 | P1_GRP_4030)))
David Brownellfa16a5c2009-02-08 10:37:06 -0800218 return -EACCES;
219
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100220 status = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
David Brownellfa16a5c2009-02-08 10:37:06 -0800221 message >> 8, 0x15 /* PB_WORD_MSB */ );
222 if (status >= 0)
223 return status;
224
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100225 return twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
David Brownellfa16a5c2009-02-08 10:37:06 -0800226 message, 0x16 /* PB_WORD_LSB */ );
227}
228
229/*----------------------------------------------------------------------*/
230
231/*
232 * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
233 * select field in its control register. We use tables indexed by VSEL
234 * to record voltages in milliVolts. (Accuracy is about three percent.)
235 *
236 * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
237 * currently handled by listing two slightly different VAUX2 regulators,
238 * only one of which will be configured.
239 *
240 * VSEL values documented as "TI cannot support these values" are flagged
241 * in these tables as UNSUP() values; we normally won't assign them.
Adrian Hunterd6bb69c2009-03-06 14:51:30 +0200242 *
243 * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
244 * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
David Brownellfa16a5c2009-02-08 10:37:06 -0800245 */
246#ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED
247#define UNSUP_MASK 0x0000
248#else
249#define UNSUP_MASK 0x8000
250#endif
251
252#define UNSUP(x) (UNSUP_MASK | (x))
253#define IS_UNSUP(x) (UNSUP_MASK & (x))
254#define LDO_MV(x) (~UNSUP_MASK & (x))
255
256
257static const u16 VAUX1_VSEL_table[] = {
258 UNSUP(1500), UNSUP(1800), 2500, 2800,
259 3000, 3000, 3000, 3000,
260};
261static const u16 VAUX2_4030_VSEL_table[] = {
262 UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
263 1500, 1800, UNSUP(1850), 2500,
264 UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
265 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
266};
267static const u16 VAUX2_VSEL_table[] = {
268 1700, 1700, 1900, 1300,
269 1500, 1800, 2000, 2500,
270 2100, 2800, 2200, 2300,
271 2400, 2400, 2400, 2400,
272};
273static const u16 VAUX3_VSEL_table[] = {
274 1500, 1800, 2500, 2800,
Adrian Hunterd6bb69c2009-03-06 14:51:30 +0200275 3000, 3000, 3000, 3000,
David Brownellfa16a5c2009-02-08 10:37:06 -0800276};
277static const u16 VAUX4_VSEL_table[] = {
278 700, 1000, 1200, UNSUP(1300),
279 1500, 1800, UNSUP(1850), 2500,
David Brownell1897e742009-03-10 11:51:15 -0800280 UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
281 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
David Brownellfa16a5c2009-02-08 10:37:06 -0800282};
283static const u16 VMMC1_VSEL_table[] = {
284 1850, 2850, 3000, 3150,
285};
286static const u16 VMMC2_VSEL_table[] = {
287 UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
288 UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
289 2600, 2800, 2850, 3000,
290 3150, 3150, 3150, 3150,
291};
292static const u16 VPLL1_VSEL_table[] = {
293 1000, 1200, 1300, 1800,
294 UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
295};
296static const u16 VPLL2_VSEL_table[] = {
297 700, 1000, 1200, 1300,
298 UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
299 UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
300 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
301};
302static const u16 VSIM_VSEL_table[] = {
303 UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
304 2800, 3000, 3000, 3000,
305};
306static const u16 VDAC_VSEL_table[] = {
307 1200, 1300, 1800, 1800,
308};
Juha Keski-Saari07fc4932009-12-16 15:27:55 +0200309static const u16 VDD1_VSEL_table[] = {
310 800, 1450,
311};
312static const u16 VDD2_VSEL_table[] = {
313 800, 1450, 1500,
314};
315static const u16 VIO_VSEL_table[] = {
316 1800, 1850,
317};
318static const u16 VINTANA2_VSEL_table[] = {
319 2500, 2750,
320};
Rajendra Nayak441a4502009-12-13 22:19:23 +0100321static const u16 VAUX1_6030_VSEL_table[] = {
322 1000, 1300, 1800, 2500,
323 2800, 2900, 3000, 3000,
324};
325static const u16 VAUX2_6030_VSEL_table[] = {
326 1200, 1800, 2500, 2750,
327 2800, 2800, 2800, 2800,
328};
329static const u16 VAUX3_6030_VSEL_table[] = {
330 1000, 1200, 1300, 1800,
331 2500, 2800, 3000, 3000,
332};
333static const u16 VMMC_VSEL_table[] = {
334 1200, 1800, 2800, 2900,
335 3000, 3000, 3000, 3000,
336};
337static const u16 VPP_VSEL_table[] = {
338 1800, 1900, 2000, 2100,
339 2200, 2300, 2400, 2500,
340};
341static const u16 VUSIM_VSEL_table[] = {
342 1200, 1800, 2500, 2900,
343};
David Brownellfa16a5c2009-02-08 10:37:06 -0800344
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100345static int twlldo_list_voltage(struct regulator_dev *rdev, unsigned index)
David Brownell66b659e2009-02-26 11:50:14 -0800346{
347 struct twlreg_info *info = rdev_get_drvdata(rdev);
348 int mV = info->table[index];
349
350 return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000);
351}
352
David Brownellfa16a5c2009-02-08 10:37:06 -0800353static int
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100354twlldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
David Brownellfa16a5c2009-02-08 10:37:06 -0800355{
356 struct twlreg_info *info = rdev_get_drvdata(rdev);
357 int vsel;
358
359 for (vsel = 0; vsel < info->table_len; vsel++) {
360 int mV = info->table[vsel];
361 int uV;
362
363 if (IS_UNSUP(mV))
364 continue;
365 uV = LDO_MV(mV) * 1000;
366
David Brownell66b659e2009-02-26 11:50:14 -0800367 /* REVISIT for VAUX2, first match may not be best/lowest */
368
David Brownellfa16a5c2009-02-08 10:37:06 -0800369 /* use the first in-range value */
370 if (min_uV <= uV && uV <= max_uV)
Rajendra Nayak441a4502009-12-13 22:19:23 +0100371 return twlreg_write(info, TWL_MODULE_PM_RECEIVER,
372 VREG_VOLTAGE, vsel);
David Brownellfa16a5c2009-02-08 10:37:06 -0800373 }
374
375 return -EDOM;
376}
377
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100378static int twlldo_get_voltage(struct regulator_dev *rdev)
David Brownellfa16a5c2009-02-08 10:37:06 -0800379{
380 struct twlreg_info *info = rdev_get_drvdata(rdev);
Rajendra Nayak441a4502009-12-13 22:19:23 +0100381 int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
382 VREG_VOLTAGE);
David Brownellfa16a5c2009-02-08 10:37:06 -0800383
384 if (vsel < 0)
385 return vsel;
386
387 vsel &= info->table_len - 1;
388 return LDO_MV(info->table[vsel]) * 1000;
389}
390
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100391static struct regulator_ops twlldo_ops = {
392 .list_voltage = twlldo_list_voltage,
David Brownell66b659e2009-02-26 11:50:14 -0800393
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100394 .set_voltage = twlldo_set_voltage,
395 .get_voltage = twlldo_get_voltage,
David Brownellfa16a5c2009-02-08 10:37:06 -0800396
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100397 .enable = twlreg_enable,
398 .disable = twlreg_disable,
399 .is_enabled = twlreg_is_enabled,
David Brownellfa16a5c2009-02-08 10:37:06 -0800400
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100401 .set_mode = twlreg_set_mode,
David Brownellfa16a5c2009-02-08 10:37:06 -0800402
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100403 .get_status = twlreg_get_status,
David Brownellfa16a5c2009-02-08 10:37:06 -0800404};
405
406/*----------------------------------------------------------------------*/
407
408/*
409 * Fixed voltage LDOs don't have a VSEL field to update.
410 */
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100411static int twlfixed_list_voltage(struct regulator_dev *rdev, unsigned index)
David Brownell66b659e2009-02-26 11:50:14 -0800412{
413 struct twlreg_info *info = rdev_get_drvdata(rdev);
414
415 return info->min_mV * 1000;
416}
417
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100418static int twlfixed_get_voltage(struct regulator_dev *rdev)
David Brownellfa16a5c2009-02-08 10:37:06 -0800419{
420 struct twlreg_info *info = rdev_get_drvdata(rdev);
421
422 return info->min_mV * 1000;
423}
424
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100425static struct regulator_ops twlfixed_ops = {
426 .list_voltage = twlfixed_list_voltage,
David Brownell66b659e2009-02-26 11:50:14 -0800427
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100428 .get_voltage = twlfixed_get_voltage,
David Brownellfa16a5c2009-02-08 10:37:06 -0800429
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100430 .enable = twlreg_enable,
431 .disable = twlreg_disable,
432 .is_enabled = twlreg_is_enabled,
David Brownellfa16a5c2009-02-08 10:37:06 -0800433
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100434 .set_mode = twlreg_set_mode,
David Brownellfa16a5c2009-02-08 10:37:06 -0800435
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100436 .get_status = twlreg_get_status,
David Brownellfa16a5c2009-02-08 10:37:06 -0800437};
438
439/*----------------------------------------------------------------------*/
440
Juha Keski-Saari045f9722009-12-16 14:49:52 +0200441#define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) \
442 TWL_ADJUSTABLE_LDO(label, offset, num, turnon_delay, \
443 remap_conf, TWL4030)
444#define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
445 remap_conf) \
446 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
447 remap_conf, TWL4030)
448#define TWL6030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, \
449 remap_conf) \
450 TWL_ADJUSTABLE_LDO(label, offset, num, turnon_delay, \
451 remap_conf, TWL6030)
452#define TWL6030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
453 remap_conf) \
454 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
455 remap_conf, TWL6030)
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100456
Juha Keski-Saari045f9722009-12-16 14:49:52 +0200457#define TWL_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf, \
458 family) { \
David Brownellfa16a5c2009-02-08 10:37:06 -0800459 .base = offset, \
460 .id = num, \
461 .table_len = ARRAY_SIZE(label##_VSEL_table), \
462 .table = label##_VSEL_table, \
Juha Keski-Saari045f9722009-12-16 14:49:52 +0200463 .delay = turnon_delay, \
464 .remap = remap_conf, \
David Brownellfa16a5c2009-02-08 10:37:06 -0800465 .desc = { \
466 .name = #label, \
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100467 .id = family##_REG_##label, \
David Brownell66b659e2009-02-26 11:50:14 -0800468 .n_voltages = ARRAY_SIZE(label##_VSEL_table), \
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100469 .ops = &twlldo_ops, \
David Brownellfa16a5c2009-02-08 10:37:06 -0800470 .type = REGULATOR_VOLTAGE, \
471 .owner = THIS_MODULE, \
472 }, \
473 }
474
Juha Keski-Saari045f9722009-12-16 14:49:52 +0200475#define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \
476 family) { \
David Brownellfa16a5c2009-02-08 10:37:06 -0800477 .base = offset, \
478 .id = num, \
479 .min_mV = mVolts, \
Juha Keski-Saari045f9722009-12-16 14:49:52 +0200480 .delay = turnon_delay, \
481 .remap = remap_conf, \
David Brownellfa16a5c2009-02-08 10:37:06 -0800482 .desc = { \
483 .name = #label, \
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100484 .id = family##_REG_##label, \
David Brownell66b659e2009-02-26 11:50:14 -0800485 .n_voltages = 1, \
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100486 .ops = &twlfixed_ops, \
David Brownellfa16a5c2009-02-08 10:37:06 -0800487 .type = REGULATOR_VOLTAGE, \
488 .owner = THIS_MODULE, \
489 }, \
490 }
491
492/*
493 * We list regulators here if systems need some level of
494 * software control over them after boot.
495 */
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100496static struct twlreg_info twl_regs[] = {
Juha Keski-Saari045f9722009-12-16 14:49:52 +0200497 TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08),
498 TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08),
499 TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08),
500 TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08),
501 TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08),
502 TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08),
503 TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08),
504 TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00),
505 TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08),
506 TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00),
507 TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08),
508 TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08),
509 TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08),
510 TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08),
511 TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08),
512 TWL4030_ADJUSTABLE_LDO(VDD1, 0x55, 15, 1000, 0x08),
513 TWL4030_ADJUSTABLE_LDO(VDD2, 0x63, 16, 1000, 0x08),
514 TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08),
515 TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08),
516 TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08),
David Brownellfa16a5c2009-02-08 10:37:06 -0800517 /* VUSBCP is managed *only* by the USB subchip */
Rajendra Nayak441a4502009-12-13 22:19:23 +0100518
519 /* 6030 REG with base as PMC Slave Misc : 0x0030 */
Juha Keski-Saari045f9722009-12-16 14:49:52 +0200520 /* Turnon-delay and remap configuration values for 6030 are not
521 verified since the specification is not public */
522 TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1, 0, 0x08),
523 TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 2, 0, 0x08),
524 TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 3, 0, 0x08),
525 TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 4, 0, 0x08),
526 TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 5, 0, 0x08),
527 TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 7, 0, 0x08),
528 TWL6030_FIXED_LDO(VANA, 0x50, 2100, 15, 0, 0x08),
529 TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 16, 0, 0x08),
530 TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 17, 0, 0x08),
531 TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 18, 0, 0x08)
David Brownellfa16a5c2009-02-08 10:37:06 -0800532};
533
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100534static int twlreg_probe(struct platform_device *pdev)
David Brownellfa16a5c2009-02-08 10:37:06 -0800535{
536 int i;
537 struct twlreg_info *info;
538 struct regulator_init_data *initdata;
539 struct regulation_constraints *c;
540 struct regulator_dev *rdev;
David Brownellfa16a5c2009-02-08 10:37:06 -0800541
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100542 for (i = 0, info = NULL; i < ARRAY_SIZE(twl_regs); i++) {
543 if (twl_regs[i].desc.id != pdev->id)
David Brownellfa16a5c2009-02-08 10:37:06 -0800544 continue;
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100545 info = twl_regs + i;
David Brownellfa16a5c2009-02-08 10:37:06 -0800546 break;
547 }
548 if (!info)
549 return -ENODEV;
550
551 initdata = pdev->dev.platform_data;
552 if (!initdata)
553 return -EINVAL;
554
555 /* Constrain board-specific capabilities according to what
556 * this driver and the chip itself can actually do.
557 */
558 c = &initdata->constraints;
David Brownellfa16a5c2009-02-08 10:37:06 -0800559 c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
560 c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
561 | REGULATOR_CHANGE_MODE
562 | REGULATOR_CHANGE_STATUS;
Juha Keski-Saari205e5cd2009-12-16 15:27:56 +0200563 switch (pdev->id) {
564 case TWL4030_REG_VIO:
565 case TWL4030_REG_VDD1:
566 case TWL4030_REG_VDD2:
567 case TWL4030_REG_VPLL1:
568 case TWL4030_REG_VINTANA1:
569 case TWL4030_REG_VINTANA2:
570 case TWL4030_REG_VINTDIG:
571 c->always_on = true;
572 break;
573 default:
574 break;
575 }
David Brownellfa16a5c2009-02-08 10:37:06 -0800576
577 rdev = regulator_register(&info->desc, &pdev->dev, initdata, info);
578 if (IS_ERR(rdev)) {
579 dev_err(&pdev->dev, "can't register %s, %ld\n",
580 info->desc.name, PTR_ERR(rdev));
581 return PTR_ERR(rdev);
582 }
583 platform_set_drvdata(pdev, rdev);
584
Juha Keski-Saari30010fa2009-12-16 15:27:58 +0200585 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP,
586 info->remap);
587
David Brownellfa16a5c2009-02-08 10:37:06 -0800588 /* NOTE: many regulators support short-circuit IRQs (presentable
589 * as REGULATOR_OVER_CURRENT notifications?) configured via:
590 * - SC_CONFIG
591 * - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
592 * - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
593 * - IT_CONFIG
594 */
595
596 return 0;
597}
598
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100599static int __devexit twlreg_remove(struct platform_device *pdev)
David Brownellfa16a5c2009-02-08 10:37:06 -0800600{
601 regulator_unregister(platform_get_drvdata(pdev));
602 return 0;
603}
604
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100605MODULE_ALIAS("platform:twl_reg");
David Brownellfa16a5c2009-02-08 10:37:06 -0800606
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100607static struct platform_driver twlreg_driver = {
608 .probe = twlreg_probe,
609 .remove = __devexit_p(twlreg_remove),
David Brownellfa16a5c2009-02-08 10:37:06 -0800610 /* NOTE: short name, to work around driver model truncation of
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100611 * "twl_regulator.12" (and friends) to "twl_regulator.1".
David Brownellfa16a5c2009-02-08 10:37:06 -0800612 */
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100613 .driver.name = "twl_reg",
David Brownellfa16a5c2009-02-08 10:37:06 -0800614 .driver.owner = THIS_MODULE,
615};
616
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100617static int __init twlreg_init(void)
David Brownellfa16a5c2009-02-08 10:37:06 -0800618{
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100619 return platform_driver_register(&twlreg_driver);
David Brownellfa16a5c2009-02-08 10:37:06 -0800620}
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100621subsys_initcall(twlreg_init);
David Brownellfa16a5c2009-02-08 10:37:06 -0800622
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100623static void __exit twlreg_exit(void)
David Brownellfa16a5c2009-02-08 10:37:06 -0800624{
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100625 platform_driver_unregister(&twlreg_driver);
David Brownellfa16a5c2009-02-08 10:37:06 -0800626}
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100627module_exit(twlreg_exit)
David Brownellfa16a5c2009-02-08 10:37:06 -0800628
Rajendra Nayakc4aa6f32009-12-13 21:36:49 +0100629MODULE_DESCRIPTION("TWL regulator driver");
David Brownellfa16a5c2009-02-08 10:37:06 -0800630MODULE_LICENSE("GPL");