2 * Driver for Regulator part of Palmas PMIC Chips
4 * Copyright 2011-2012 Texas Instruments Inc.
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/err.h>
19 #include <linux/platform_device.h>
20 #include <linux/regulator/driver.h>
21 #include <linux/regulator/machine.h>
22 #include <linux/slab.h>
23 #include <linux/regmap.h>
24 #include <linux/mfd/palmas.h>
33 static const struct regs_info palmas_regs_info[] = {
36 .vsel_addr = PALMAS_SMPS12_VOLTAGE,
37 .ctrl_addr = PALMAS_SMPS12_CTRL,
38 .tstep_addr = PALMAS_SMPS12_TSTEP,
42 .vsel_addr = PALMAS_SMPS12_VOLTAGE,
43 .ctrl_addr = PALMAS_SMPS12_CTRL,
44 .tstep_addr = PALMAS_SMPS12_TSTEP,
48 .vsel_addr = PALMAS_SMPS3_VOLTAGE,
49 .ctrl_addr = PALMAS_SMPS3_CTRL,
53 .vsel_addr = PALMAS_SMPS45_VOLTAGE,
54 .ctrl_addr = PALMAS_SMPS45_CTRL,
55 .tstep_addr = PALMAS_SMPS45_TSTEP,
59 .vsel_addr = PALMAS_SMPS45_VOLTAGE,
60 .ctrl_addr = PALMAS_SMPS45_CTRL,
61 .tstep_addr = PALMAS_SMPS45_TSTEP,
65 .vsel_addr = PALMAS_SMPS6_VOLTAGE,
66 .ctrl_addr = PALMAS_SMPS6_CTRL,
67 .tstep_addr = PALMAS_SMPS6_TSTEP,
71 .vsel_addr = PALMAS_SMPS7_VOLTAGE,
72 .ctrl_addr = PALMAS_SMPS7_CTRL,
76 .vsel_addr = PALMAS_SMPS8_VOLTAGE,
77 .ctrl_addr = PALMAS_SMPS8_CTRL,
78 .tstep_addr = PALMAS_SMPS8_TSTEP,
82 .vsel_addr = PALMAS_SMPS9_VOLTAGE,
83 .ctrl_addr = PALMAS_SMPS9_CTRL,
90 .vsel_addr = PALMAS_LDO1_VOLTAGE,
91 .ctrl_addr = PALMAS_LDO1_CTRL,
95 .vsel_addr = PALMAS_LDO2_VOLTAGE,
96 .ctrl_addr = PALMAS_LDO2_CTRL,
100 .vsel_addr = PALMAS_LDO3_VOLTAGE,
101 .ctrl_addr = PALMAS_LDO3_CTRL,
105 .vsel_addr = PALMAS_LDO4_VOLTAGE,
106 .ctrl_addr = PALMAS_LDO4_CTRL,
110 .vsel_addr = PALMAS_LDO5_VOLTAGE,
111 .ctrl_addr = PALMAS_LDO5_CTRL,
115 .vsel_addr = PALMAS_LDO6_VOLTAGE,
116 .ctrl_addr = PALMAS_LDO6_CTRL,
120 .vsel_addr = PALMAS_LDO7_VOLTAGE,
121 .ctrl_addr = PALMAS_LDO7_CTRL,
125 .vsel_addr = PALMAS_LDO8_VOLTAGE,
126 .ctrl_addr = PALMAS_LDO8_CTRL,
130 .vsel_addr = PALMAS_LDO9_VOLTAGE,
131 .ctrl_addr = PALMAS_LDO9_CTRL,
135 .vsel_addr = PALMAS_LDOLN_VOLTAGE,
136 .ctrl_addr = PALMAS_LDOLN_CTRL,
140 .vsel_addr = PALMAS_LDOUSB_VOLTAGE,
141 .ctrl_addr = PALMAS_LDOUSB_CTRL,
145 #define SMPS_CTRL_MODE_OFF 0x00
146 #define SMPS_CTRL_MODE_ON 0x01
147 #define SMPS_CTRL_MODE_ECO 0x02
148 #define SMPS_CTRL_MODE_PWM 0x03
150 /* These values are derived from the data sheet. And are the number of steps
151 * where there is a voltage change, the ranges at beginning and end of register
152 * max/min values where there are no change are ommitted.
154 * So they are basically (maxV-minV)/stepV
156 #define PALMAS_SMPS_NUM_VOLTAGES 116
157 #define PALMAS_SMPS10_NUM_VOLTAGES 2
158 #define PALMAS_LDO_NUM_VOLTAGES 50
160 #define SMPS10_VSEL (1<<3)
161 #define SMPS10_BOOST_EN (1<<2)
162 #define SMPS10_BYPASS_EN (1<<1)
163 #define SMPS10_SWITCH_EN (1<<0)
165 #define REGULATOR_SLAVE 0
167 static int palmas_smps_read(struct palmas *palmas, unsigned int reg,
172 addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
174 return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
177 static int palmas_smps_write(struct palmas *palmas, unsigned int reg,
182 addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
184 return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
187 static int palmas_ldo_read(struct palmas *palmas, unsigned int reg,
192 addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
194 return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
197 static int palmas_ldo_write(struct palmas *palmas, unsigned int reg,
202 addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
204 return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
207 static int palmas_is_enabled_smps(struct regulator_dev *dev)
209 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
210 int id = rdev_get_id(dev);
213 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®);
215 reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
216 reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
221 static int palmas_enable_smps(struct regulator_dev *dev)
223 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
224 int id = rdev_get_id(dev);
227 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®);
229 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
230 reg |= SMPS_CTRL_MODE_ON;
232 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
237 static int palmas_disable_smps(struct regulator_dev *dev)
239 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
240 int id = rdev_get_id(dev);
243 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®);
245 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
247 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
253 static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
255 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
256 int id = rdev_get_id(dev);
259 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®);
260 reg &= ~PALMAS_SMPS12_CTRL_STATUS_MASK;
261 reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
264 case REGULATOR_MODE_NORMAL:
265 reg |= SMPS_CTRL_MODE_ON;
267 case REGULATOR_MODE_IDLE:
268 reg |= SMPS_CTRL_MODE_ECO;
270 case REGULATOR_MODE_FAST:
271 reg |= SMPS_CTRL_MODE_PWM;
276 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
281 static unsigned int palmas_get_mode_smps(struct regulator_dev *dev)
283 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
284 int id = rdev_get_id(dev);
287 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®);
288 reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
289 reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
292 case SMPS_CTRL_MODE_ON:
293 return REGULATOR_MODE_NORMAL;
294 case SMPS_CTRL_MODE_ECO:
295 return REGULATOR_MODE_IDLE;
296 case SMPS_CTRL_MODE_PWM:
297 return REGULATOR_MODE_FAST;
303 static int palmas_list_voltage_smps(struct regulator_dev *dev,
306 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
307 int id = rdev_get_id(dev);
313 /* Read the multiplier set in VSEL register to return
314 * the correct voltage.
319 /* Voltage is (0.49V + (selector * 0.01V)) * RANGE
320 * as defined in data sheet. RANGE is either x1 or x2
322 return (490000 + (selector * 10000)) * mult;
325 static int palmas_get_voltage_smps_sel(struct regulator_dev *dev)
327 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
328 int id = rdev_get_id(dev);
333 addr = palmas_regs_info[id].vsel_addr;
335 palmas_smps_read(pmic->palmas, addr, ®);
337 selector = reg & PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
339 /* Adjust selector to match list_voltage ranges */
340 if ((selector > 0) && (selector < 6))
351 static int palmas_set_voltage_smps_sel(struct regulator_dev *dev,
354 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
355 int id = rdev_get_id(dev);
356 unsigned int reg = 0;
359 addr = palmas_regs_info[id].vsel_addr;
361 /* Make sure we don't change the value of RANGE */
363 reg |= PALMAS_SMPS12_VOLTAGE_RANGE;
365 /* Adjust the linux selector into range used in VSEL register */
369 palmas_smps_write(pmic->palmas, addr, reg);
374 static int palmas_map_voltage_smps(struct regulator_dev *rdev,
375 int min_uV, int max_uV)
379 ret = ((min_uV - 500000) / 10000) + 1;
383 /* Map back into a voltage to verify we're still in bounds */
384 voltage = palmas_list_voltage_smps(rdev, ret);
385 if (voltage < min_uV || voltage > max_uV)
391 static struct regulator_ops palmas_ops_smps = {
392 .is_enabled = palmas_is_enabled_smps,
393 .enable = palmas_enable_smps,
394 .disable = palmas_disable_smps,
395 .set_mode = palmas_set_mode_smps,
396 .get_mode = palmas_get_mode_smps,
397 .get_voltage_sel = palmas_get_voltage_smps_sel,
398 .set_voltage_sel = palmas_set_voltage_smps_sel,
399 .list_voltage = palmas_list_voltage_smps,
400 .map_voltage = palmas_map_voltage_smps,
403 static int palmas_list_voltage_smps10(struct regulator_dev *dev,
406 return 3750000 + (selector * 1250000);
409 static struct regulator_ops palmas_ops_smps10 = {
410 .is_enabled = regulator_is_enabled_regmap,
411 .enable = regulator_enable_regmap,
412 .disable = regulator_disable_regmap,
413 .get_voltage_sel = regulator_get_voltage_sel_regmap,
414 .set_voltage_sel = regulator_set_voltage_sel_regmap,
415 .list_voltage = palmas_list_voltage_smps10,
418 static int palmas_is_enabled_ldo(struct regulator_dev *dev)
420 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
421 int id = rdev_get_id(dev);
424 palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®);
426 reg &= PALMAS_LDO1_CTRL_STATUS;
431 static int palmas_list_voltage_ldo(struct regulator_dev *dev,
437 /* voltage is 0.85V + (selector * 0.05v) */
438 return 850000 + (selector * 50000);
441 static int palmas_get_voltage_ldo_sel(struct regulator_dev *dev)
443 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
444 int id = rdev_get_id(dev);
449 addr = palmas_regs_info[id].vsel_addr;
451 palmas_ldo_read(pmic->palmas, addr, ®);
453 selector = reg & PALMAS_LDO1_VOLTAGE_VSEL_MASK;
455 /* Adjust selector to match list_voltage ranges */
462 static int palmas_set_voltage_ldo_sel(struct regulator_dev *dev,
465 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
466 int id = rdev_get_id(dev);
467 unsigned int reg = 0;
470 addr = palmas_regs_info[id].vsel_addr;
474 palmas_ldo_write(pmic->palmas, addr, reg);
479 static int palmas_map_voltage_ldo(struct regulator_dev *rdev,
480 int min_uV, int max_uV)
484 ret = ((min_uV - 900000) / 50000) + 1;
488 /* Map back into a voltage to verify we're still in bounds */
489 voltage = palmas_list_voltage_ldo(rdev, ret);
490 if (voltage < min_uV || voltage > max_uV)
496 static struct regulator_ops palmas_ops_ldo = {
497 .is_enabled = palmas_is_enabled_ldo,
498 .enable = regulator_enable_regmap,
499 .disable = regulator_disable_regmap,
500 .get_voltage_sel = palmas_get_voltage_ldo_sel,
501 .set_voltage_sel = palmas_set_voltage_ldo_sel,
502 .list_voltage = palmas_list_voltage_ldo,
503 .map_voltage = palmas_map_voltage_ldo,
507 * setup the hardware based sleep configuration of the SMPS/LDO regulators
508 * from the platform data. This is different to the software based control
509 * supported by the regulator framework as it is controlled by toggling
510 * pins on the PMIC such as PREQ, SYSEN, ...
512 static int palmas_smps_init(struct palmas *palmas, int id,
513 struct palmas_reg_init *reg_init)
519 addr = palmas_regs_info[id].ctrl_addr;
521 ret = palmas_smps_read(palmas, addr, ®);
525 if (id != PALMAS_REG_SMPS10) {
526 if (reg_init->warm_reset)
527 reg |= PALMAS_SMPS12_CTRL_WR_S;
529 if (reg_init->roof_floor)
530 reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
532 if (reg_init->mode_sleep) {
533 reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
534 reg |= reg_init->mode_sleep <<
535 PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT;
538 if (reg_init->mode_sleep) {
539 reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
540 reg |= reg_init->mode_sleep <<
541 PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT;
545 ret = palmas_smps_write(palmas, addr, reg);
549 if (palmas_regs_info[id].tstep_addr && reg_init->tstep) {
550 addr = palmas_regs_info[id].tstep_addr;
552 reg = reg_init->tstep & PALMAS_SMPS12_TSTEP_TSTEP_MASK;
554 ret = palmas_smps_write(palmas, addr, reg);
559 if (palmas_regs_info[id].vsel_addr && reg_init->vsel) {
560 addr = palmas_regs_info[id].vsel_addr;
562 reg = reg_init->vsel;
564 ret = palmas_smps_write(palmas, addr, reg);
573 static int palmas_ldo_init(struct palmas *palmas, int id,
574 struct palmas_reg_init *reg_init)
580 addr = palmas_regs_info[id].ctrl_addr;
582 ret = palmas_smps_read(palmas, addr, ®);
586 if (reg_init->warm_reset)
587 reg |= PALMAS_LDO1_CTRL_WR_S;
589 if (reg_init->mode_sleep)
590 reg |= PALMAS_LDO1_CTRL_MODE_SLEEP;
592 ret = palmas_smps_write(palmas, addr, reg);
599 static __devinit int palmas_probe(struct platform_device *pdev)
601 struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
602 struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data;
603 struct regulator_dev *rdev;
604 struct regulator_config config = { };
605 struct palmas_pmic *pmic;
606 struct palmas_reg_init *reg_init;
608 unsigned int addr, reg;
612 if (!pdata->reg_data)
615 pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
619 pmic->dev = &pdev->dev;
620 pmic->palmas = palmas;
622 platform_set_drvdata(pdev, pmic);
624 ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, ®);
626 goto err_unregister_regulator;
628 if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN)
631 if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN)
634 config.regmap = palmas->regmap[REGULATOR_SLAVE];
635 config.dev = &pdev->dev;
636 config.driver_data = pmic;
638 for (id = 0; id < PALMAS_REG_LDO1; id++) {
641 * Miss out regulators which are not available due
642 * to slaving configurations.
645 case PALMAS_REG_SMPS12:
646 case PALMAS_REG_SMPS3:
650 case PALMAS_REG_SMPS123:
654 case PALMAS_REG_SMPS45:
655 case PALMAS_REG_SMPS7:
659 case PALMAS_REG_SMPS457:
664 /* Register the regulators */
665 pmic->desc[id].name = palmas_regs_info[id].name;
666 pmic->desc[id].id = id;
668 if (id != PALMAS_REG_SMPS10) {
669 pmic->desc[id].ops = &palmas_ops_smps;
670 pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES;
672 pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES;
673 pmic->desc[id].ops = &palmas_ops_smps10;
674 pmic->desc[id].vsel_reg = PALMAS_SMPS10_CTRL;
675 pmic->desc[id].vsel_mask = SMPS10_VSEL;
676 pmic->desc[id].enable_reg = PALMAS_SMPS10_STATUS;
677 pmic->desc[id].enable_mask = SMPS10_BOOST_EN;
680 pmic->desc[id].type = REGULATOR_VOLTAGE;
681 pmic->desc[id].owner = THIS_MODULE;
683 /* Initialise sleep/init values from platform data */
684 if (pdata && pdata->reg_init) {
685 reg_init = pdata->reg_init[id];
687 ret = palmas_smps_init(palmas, id, reg_init);
689 goto err_unregister_regulator;
694 * read and store the RANGE bit for later use
695 * This must be done before regulator is probed otherwise
696 * we error in probe with unsuportable ranges.
698 if (id != PALMAS_REG_SMPS10) {
699 addr = palmas_regs_info[id].vsel_addr;
701 ret = palmas_smps_read(pmic->palmas, addr, ®);
703 goto err_unregister_regulator;
704 if (reg & PALMAS_SMPS12_VOLTAGE_RANGE)
708 if (pdata && pdata->reg_data)
709 config.init_data = pdata->reg_data[id];
711 config.init_data = NULL;
713 rdev = regulator_register(&pmic->desc[id], &config);
716 "failed to register %s regulator\n",
719 goto err_unregister_regulator;
722 /* Save regulator for cleanup */
723 pmic->rdev[id] = rdev;
726 /* Start this loop from the id left from previous loop */
727 for (; id < PALMAS_NUM_REGS; id++) {
729 /* Miss out regulators which are not available due
730 * to alternate functions.
733 /* Register the regulators */
734 pmic->desc[id].name = palmas_regs_info[id].name;
735 pmic->desc[id].id = id;
736 pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
738 pmic->desc[id].ops = &palmas_ops_ldo;
740 pmic->desc[id].type = REGULATOR_VOLTAGE;
741 pmic->desc[id].owner = THIS_MODULE;
742 pmic->desc[id].enable_reg = palmas_regs_info[id].ctrl_addr;
743 pmic->desc[id].enable_mask = PALMAS_LDO1_CTRL_MODE_ACTIVE;
745 if (pdata && pdata->reg_data)
746 config.init_data = pdata->reg_data[id];
748 config.init_data = NULL;
750 rdev = regulator_register(&pmic->desc[id], &config);
753 "failed to register %s regulator\n",
756 goto err_unregister_regulator;
759 /* Save regulator for cleanup */
760 pmic->rdev[id] = rdev;
762 /* Initialise sleep/init values from platform data */
763 if (pdata->reg_init) {
764 reg_init = pdata->reg_init[id];
766 ret = palmas_ldo_init(palmas, id, reg_init);
768 goto err_unregister_regulator;
775 err_unregister_regulator:
777 regulator_unregister(pmic->rdev[id]);
784 static int __devexit palmas_remove(struct platform_device *pdev)
786 struct palmas_pmic *pmic = platform_get_drvdata(pdev);
789 for (id = 0; id < PALMAS_NUM_REGS; id++)
790 regulator_unregister(pmic->rdev[id]);
798 static struct platform_driver palmas_driver = {
800 .name = "palmas-pmic",
801 .owner = THIS_MODULE,
803 .probe = palmas_probe,
804 .remove = __devexit_p(palmas_remove),
807 static int __init palmas_init(void)
809 return platform_driver_register(&palmas_driver);
811 subsys_initcall(palmas_init);
813 static void __exit palmas_exit(void)
815 platform_driver_unregister(&palmas_driver);
817 module_exit(palmas_exit);
819 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
820 MODULE_DESCRIPTION("Palmas voltage regulator driver");
821 MODULE_LICENSE("GPL");
822 MODULE_ALIAS("platform:palmas-pmic");