2 * Regulator driver for DA9055 PMIC
4 * Copyright(c) 2012 Dialog Semiconductor Ltd.
6 * Author: David Dajun Chen <dchen@diasemi.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/err.h>
18 #include <linux/gpio.h>
19 #include <linux/platform_device.h>
20 #include <linux/regulator/driver.h>
21 #include <linux/regulator/machine.h>
23 #include <linux/mfd/da9055/core.h>
24 #include <linux/mfd/da9055/reg.h>
25 #include <linux/mfd/da9055/pdata.h>
27 #define DA9055_MIN_UA 0
28 #define DA9055_MAX_UA 3
30 #define DA9055_LDO_MODE_SYNC 0
31 #define DA9055_LDO_MODE_SLEEP 1
33 #define DA9055_BUCK_MODE_SLEEP 1
34 #define DA9055_BUCK_MODE_SYNC 2
35 #define DA9055_BUCK_MODE_AUTO 3
37 /* DA9055 REGULATOR IDs */
38 #define DA9055_ID_BUCK1 0
39 #define DA9055_ID_BUCK2 1
40 #define DA9055_ID_LDO1 2
41 #define DA9055_ID_LDO2 3
42 #define DA9055_ID_LDO3 4
43 #define DA9055_ID_LDO4 5
44 #define DA9055_ID_LDO5 6
45 #define DA9055_ID_LDO6 7
47 /* DA9055 BUCK current limit */
48 static const int da9055_current_limits
[] = { 500000, 600000, 700000, 800000 };
50 struct da9055_conf_reg
{
56 struct da9055_volt_reg
{
64 struct da9055_mode_reg
{
70 struct da9055_regulator_info
{
71 struct regulator_desc reg_desc
;
72 struct da9055_conf_reg conf
;
73 struct da9055_volt_reg volt
;
74 struct da9055_mode_reg mode
;
77 struct da9055_regulator
{
78 struct da9055
*da9055
;
79 struct da9055_regulator_info
*info
;
80 struct regulator_dev
*rdev
;
81 enum gpio_select reg_rselect
;
84 static unsigned int da9055_buck_get_mode(struct regulator_dev
*rdev
)
86 struct da9055_regulator
*regulator
= rdev_get_drvdata(rdev
);
87 struct da9055_regulator_info
*info
= regulator
->info
;
90 ret
= da9055_reg_read(regulator
->da9055
, info
->mode
.reg
);
94 switch ((ret
& info
->mode
.mask
) >> info
->mode
.shift
) {
95 case DA9055_BUCK_MODE_SYNC
:
96 mode
= REGULATOR_MODE_FAST
;
98 case DA9055_BUCK_MODE_AUTO
:
99 mode
= REGULATOR_MODE_NORMAL
;
101 case DA9055_BUCK_MODE_SLEEP
:
102 mode
= REGULATOR_MODE_STANDBY
;
109 static int da9055_buck_set_mode(struct regulator_dev
*rdev
,
112 struct da9055_regulator
*regulator
= rdev_get_drvdata(rdev
);
113 struct da9055_regulator_info
*info
= regulator
->info
;
117 case REGULATOR_MODE_FAST
:
118 val
= DA9055_BUCK_MODE_SYNC
<< info
->mode
.shift
;
120 case REGULATOR_MODE_NORMAL
:
121 val
= DA9055_BUCK_MODE_AUTO
<< info
->mode
.shift
;
123 case REGULATOR_MODE_STANDBY
:
124 val
= DA9055_BUCK_MODE_SLEEP
<< info
->mode
.shift
;
128 return da9055_reg_update(regulator
->da9055
, info
->mode
.reg
,
129 info
->mode
.mask
, val
);
132 static unsigned int da9055_ldo_get_mode(struct regulator_dev
*rdev
)
134 struct da9055_regulator
*regulator
= rdev_get_drvdata(rdev
);
135 struct da9055_regulator_info
*info
= regulator
->info
;
138 ret
= da9055_reg_read(regulator
->da9055
, info
->volt
.reg_b
);
142 if (ret
>> info
->volt
.sl_shift
)
143 return REGULATOR_MODE_STANDBY
;
145 return REGULATOR_MODE_NORMAL
;
148 static int da9055_ldo_set_mode(struct regulator_dev
*rdev
, unsigned int mode
)
150 struct da9055_regulator
*regulator
= rdev_get_drvdata(rdev
);
151 struct da9055_regulator_info
*info
= regulator
->info
;
152 struct da9055_volt_reg volt
= info
->volt
;
156 case REGULATOR_MODE_NORMAL
:
157 case REGULATOR_MODE_FAST
:
158 val
= DA9055_LDO_MODE_SYNC
;
160 case REGULATOR_MODE_STANDBY
:
161 val
= DA9055_LDO_MODE_SLEEP
;
165 return da9055_reg_update(regulator
->da9055
, volt
.reg_b
,
167 val
<< volt
.sl_shift
);
170 static int da9055_buck_get_current_limit(struct regulator_dev
*rdev
)
172 struct da9055_regulator
*regulator
= rdev_get_drvdata(rdev
);
173 struct da9055_regulator_info
*info
= regulator
->info
;
176 ret
= da9055_reg_read(regulator
->da9055
, DA9055_REG_BUCK_LIM
);
180 ret
&= info
->mode
.mask
;
181 return da9055_current_limits
[ret
>> info
->mode
.shift
];
184 static int da9055_buck_set_current_limit(struct regulator_dev
*rdev
, int min_uA
,
187 struct da9055_regulator
*regulator
= rdev_get_drvdata(rdev
);
188 struct da9055_regulator_info
*info
= regulator
->info
;
191 for (i
= ARRAY_SIZE(da9055_current_limits
) - 1; i
>= 0; i
--) {
192 if ((min_uA
<= da9055_current_limits
[i
]) &&
193 (da9055_current_limits
[i
] <= max_uA
))
194 return da9055_reg_update(regulator
->da9055
,
197 i
<< info
->mode
.shift
);
203 static int da9055_regulator_get_voltage_sel(struct regulator_dev
*rdev
)
205 struct da9055_regulator
*regulator
= rdev_get_drvdata(rdev
);
206 struct da9055_regulator_info
*info
= regulator
->info
;
207 struct da9055_volt_reg volt
= info
->volt
;
211 * There are two voltage register set A & B for voltage ramping but
212 * either one of then can be active therefore we first determine
213 * the active register set.
215 ret
= da9055_reg_read(regulator
->da9055
, info
->conf
.reg
);
219 ret
&= info
->conf
.sel_mask
;
221 /* Get the voltage for the active register set A/B */
222 if (ret
== DA9055_REGUALTOR_SET_A
)
223 ret
= da9055_reg_read(regulator
->da9055
, volt
.reg_a
);
225 ret
= da9055_reg_read(regulator
->da9055
, volt
.reg_b
);
230 sel
= (ret
& volt
.v_mask
);
234 static int da9055_regulator_set_voltage_sel(struct regulator_dev
*rdev
,
235 unsigned int selector
)
237 struct da9055_regulator
*regulator
= rdev_get_drvdata(rdev
);
238 struct da9055_regulator_info
*info
= regulator
->info
;
242 * Regulator register set A/B is not selected through GPIO therefore
243 * we use default register set A for voltage ramping.
245 if (regulator
->reg_rselect
== NO_GPIO
) {
246 /* Select register set A */
247 ret
= da9055_reg_update(regulator
->da9055
, info
->conf
.reg
,
248 info
->conf
.sel_mask
, DA9055_SEL_REG_A
);
252 /* Set the voltage */
253 return da9055_reg_update(regulator
->da9055
, info
->volt
.reg_a
,
254 info
->volt
.v_mask
, selector
);
258 * Here regulator register set A/B is selected through GPIO.
259 * Therefore we first determine the selected register set A/B and
260 * then set the desired voltage for that register set A/B.
262 ret
= da9055_reg_read(regulator
->da9055
, info
->conf
.reg
);
266 ret
&= info
->conf
.sel_mask
;
268 /* Set the voltage */
269 if (ret
== DA9055_REGUALTOR_SET_A
)
270 return da9055_reg_update(regulator
->da9055
, info
->volt
.reg_a
,
271 info
->volt
.v_mask
, selector
);
273 return da9055_reg_update(regulator
->da9055
, info
->volt
.reg_b
,
274 info
->volt
.v_mask
, selector
);
277 static int da9055_regulator_set_suspend_voltage(struct regulator_dev
*rdev
,
280 struct da9055_regulator
*regulator
= rdev_get_drvdata(rdev
);
281 struct da9055_regulator_info
*info
= regulator
->info
;
284 /* Select register set B for suspend voltage ramping. */
285 if (regulator
->reg_rselect
== NO_GPIO
) {
286 ret
= da9055_reg_update(regulator
->da9055
, info
->conf
.reg
,
287 info
->conf
.sel_mask
, DA9055_SEL_REG_B
);
292 ret
= regulator_map_voltage_linear(rdev
, uV
, uV
);
296 return da9055_reg_update(regulator
->da9055
, info
->volt
.reg_b
,
297 info
->volt
.v_mask
, ret
);
300 static int da9055_suspend_enable(struct regulator_dev
*rdev
)
302 struct da9055_regulator
*regulator
= rdev_get_drvdata(rdev
);
303 struct da9055_regulator_info
*info
= regulator
->info
;
305 /* Select register set B for voltage ramping. */
306 if (regulator
->reg_rselect
== NO_GPIO
)
307 return da9055_reg_update(regulator
->da9055
, info
->conf
.reg
,
308 info
->conf
.sel_mask
, DA9055_SEL_REG_B
);
313 static int da9055_suspend_disable(struct regulator_dev
*rdev
)
315 struct da9055_regulator
*regulator
= rdev_get_drvdata(rdev
);
316 struct da9055_regulator_info
*info
= regulator
->info
;
318 /* Diselect register set B. */
319 if (regulator
->reg_rselect
== NO_GPIO
)
320 return da9055_reg_update(regulator
->da9055
, info
->conf
.reg
,
321 info
->conf
.sel_mask
, DA9055_SEL_REG_A
);
326 static struct regulator_ops da9055_buck_ops
= {
327 .get_mode
= da9055_buck_get_mode
,
328 .set_mode
= da9055_buck_set_mode
,
330 .get_current_limit
= da9055_buck_get_current_limit
,
331 .set_current_limit
= da9055_buck_set_current_limit
,
333 .get_voltage_sel
= da9055_regulator_get_voltage_sel
,
334 .set_voltage_sel
= da9055_regulator_set_voltage_sel
,
335 .list_voltage
= regulator_list_voltage_linear
,
336 .map_voltage
= regulator_map_voltage_linear
,
337 .is_enabled
= regulator_is_enabled_regmap
,
338 .enable
= regulator_enable_regmap
,
339 .disable
= regulator_disable_regmap
,
341 .set_suspend_voltage
= da9055_regulator_set_suspend_voltage
,
342 .set_suspend_enable
= da9055_suspend_enable
,
343 .set_suspend_disable
= da9055_suspend_disable
,
344 .set_suspend_mode
= da9055_buck_set_mode
,
347 static struct regulator_ops da9055_ldo_ops
= {
348 .get_mode
= da9055_ldo_get_mode
,
349 .set_mode
= da9055_ldo_set_mode
,
351 .get_voltage_sel
= da9055_regulator_get_voltage_sel
,
352 .set_voltage_sel
= da9055_regulator_set_voltage_sel
,
353 .list_voltage
= regulator_list_voltage_linear
,
354 .map_voltage
= regulator_map_voltage_linear
,
355 .is_enabled
= regulator_is_enabled_regmap
,
356 .enable
= regulator_enable_regmap
,
357 .disable
= regulator_disable_regmap
,
359 .set_suspend_voltage
= da9055_regulator_set_suspend_voltage
,
360 .set_suspend_enable
= da9055_suspend_enable
,
361 .set_suspend_disable
= da9055_suspend_disable
,
362 .set_suspend_mode
= da9055_ldo_set_mode
,
366 #define DA9055_LDO(_id, step, min, max, vbits, voffset) \
370 .ops = &da9055_ldo_ops,\
371 .type = REGULATOR_VOLTAGE,\
372 .id = DA9055_ID_##_id,\
373 .n_voltages = (max - min) / step + 1 + (voffset), \
374 .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
376 .min_uV = (min) * 1000,\
377 .uV_step = (step) * 1000,\
378 .linear_min_sel = (voffset),\
379 .owner = THIS_MODULE,\
382 .reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
383 .sel_mask = (1 << 4),\
387 .reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
388 .reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
390 .v_mask = (1 << (vbits)) - 1,\
395 #define DA9055_BUCK(_id, step, min, max, vbits, voffset, mbits, sbits) \
399 .ops = &da9055_buck_ops,\
400 .type = REGULATOR_VOLTAGE,\
401 .id = DA9055_ID_##_id,\
402 .n_voltages = (max - min) / step + 1 + (voffset), \
403 .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
405 .min_uV = (min) * 1000,\
406 .uV_step = (step) * 1000,\
407 .linear_min_sel = (voffset),\
408 .owner = THIS_MODULE,\
411 .reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
412 .sel_mask = (1 << 4),\
416 .reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
417 .reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
419 .v_mask = (1 << (vbits)) - 1,\
423 .reg = DA9055_REG_BCORE_MODE,\
429 static struct da9055_regulator_info da9055_regulator_info
[] = {
430 DA9055_BUCK(BUCK1
, 25, 725, 2075, 6, 9, 0xc, 2),
431 DA9055_BUCK(BUCK2
, 25, 925, 2500, 6, 0, 3, 0),
432 DA9055_LDO(LDO1
, 50, 900, 3300, 6, 2),
433 DA9055_LDO(LDO2
, 50, 900, 3300, 6, 3),
434 DA9055_LDO(LDO3
, 50, 900, 3300, 6, 2),
435 DA9055_LDO(LDO4
, 50, 900, 3300, 6, 2),
436 DA9055_LDO(LDO5
, 50, 900, 2750, 6, 2),
437 DA9055_LDO(LDO6
, 20, 900, 3300, 7, 0),
441 * Configures regulator to be controlled either through GPIO 1 or 2.
442 * GPIO can control regulator state and/or select the regulator register
443 * set A/B for voltage ramping.
445 static int da9055_gpio_init(struct da9055_regulator
*regulator
,
446 struct regulator_config
*config
,
447 struct da9055_pdata
*pdata
, int id
)
449 struct da9055_regulator_info
*info
= regulator
->info
;
452 if (pdata
->gpio_ren
&& pdata
->gpio_ren
[id
]) {
454 int gpio_mux
= pdata
->gpio_ren
[id
];
456 config
->ena_gpio
= pdata
->ena_gpio
[id
];
457 config
->ena_gpio_flags
= GPIOF_OUT_INIT_HIGH
;
458 config
->ena_gpio_invert
= 1;
461 * GPI pin is muxed with regulator to control the
464 sprintf(name
, "DA9055 GPI %d", gpio_mux
);
465 ret
= devm_gpio_request_one(config
->dev
, gpio_mux
, GPIOF_DIR_IN
,
471 * Let the regulator know that its state is controlled
474 ret
= da9055_reg_update(regulator
->da9055
, info
->conf
.reg
,
477 << DA9055_E_GPI_SHIFT
);
482 if (pdata
->gpio_rsel
&& pdata
->gpio_rsel
[id
]) {
484 int gpio_mux
= pdata
->gpio_rsel
[id
];
486 regulator
->reg_rselect
= pdata
->reg_rsel
[id
];
489 * GPI pin is muxed with regulator to select the
490 * regulator register set A/B for voltage ramping.
492 sprintf(name
, "DA9055 GPI %d", gpio_mux
);
493 ret
= devm_gpio_request_one(config
->dev
, gpio_mux
, GPIOF_DIR_IN
,
499 * Let the regulator know that its register set A/B
500 * will be selected through GPI for voltage ramping.
502 ret
= da9055_reg_update(regulator
->da9055
, info
->conf
.reg
,
505 << DA9055_V_GPI_SHIFT
);
512 static irqreturn_t
da9055_ldo5_6_oc_irq(int irq
, void *data
)
514 struct da9055_regulator
*regulator
= data
;
516 regulator_notifier_call_chain(regulator
->rdev
,
517 REGULATOR_EVENT_OVER_CURRENT
, NULL
);
522 static inline struct da9055_regulator_info
*find_regulator_info(int id
)
524 struct da9055_regulator_info
*info
;
527 for (i
= 0; i
< ARRAY_SIZE(da9055_regulator_info
); i
++) {
528 info
= &da9055_regulator_info
[i
];
529 if (info
->reg_desc
.id
== id
)
536 static int da9055_regulator_probe(struct platform_device
*pdev
)
538 struct regulator_config config
= { };
539 struct da9055_regulator
*regulator
;
540 struct da9055
*da9055
= dev_get_drvdata(pdev
->dev
.parent
);
541 struct da9055_pdata
*pdata
= da9055
->dev
->platform_data
;
544 if (pdata
== NULL
|| pdata
->regulators
[pdev
->id
] == NULL
)
547 regulator
= devm_kzalloc(&pdev
->dev
, sizeof(struct da9055_regulator
),
552 regulator
->info
= find_regulator_info(pdev
->id
);
553 if (regulator
->info
== NULL
) {
554 dev_err(&pdev
->dev
, "invalid regulator ID specified\n");
558 regulator
->da9055
= da9055
;
559 config
.dev
= &pdev
->dev
;
560 config
.driver_data
= regulator
;
561 config
.regmap
= da9055
->regmap
;
563 if (pdata
&& pdata
->regulators
)
564 config
.init_data
= pdata
->regulators
[pdev
->id
];
566 ret
= da9055_gpio_init(regulator
, &config
, pdata
, pdev
->id
);
570 regulator
->rdev
= regulator_register(®ulator
->info
->reg_desc
,
572 if (IS_ERR(regulator
->rdev
)) {
573 dev_err(&pdev
->dev
, "Failed to register regulator %s\n",
574 regulator
->info
->reg_desc
.name
);
575 ret
= PTR_ERR(regulator
->rdev
);
579 /* Only LDO 5 and 6 has got the over current interrupt */
580 if (pdev
->id
== DA9055_ID_LDO5
|| pdev
->id
== DA9055_ID_LDO6
) {
581 irq
= platform_get_irq_byname(pdev
, "REGULATOR");
582 irq
= regmap_irq_get_virq(da9055
->irq_data
, irq
);
583 ret
= devm_request_threaded_irq(&pdev
->dev
, irq
, NULL
,
584 da9055_ldo5_6_oc_irq
,
588 pdev
->name
, regulator
);
592 "Failed to request Regulator IRQ %d: %d\n",
599 platform_set_drvdata(pdev
, regulator
);
604 regulator_unregister(regulator
->rdev
);
608 static int da9055_regulator_remove(struct platform_device
*pdev
)
610 struct da9055_regulator
*regulator
= platform_get_drvdata(pdev
);
612 regulator_unregister(regulator
->rdev
);
617 static struct platform_driver da9055_regulator_driver
= {
618 .probe
= da9055_regulator_probe
,
619 .remove
= da9055_regulator_remove
,
621 .name
= "da9055-regulator",
622 .owner
= THIS_MODULE
,
626 static int __init
da9055_regulator_init(void)
628 return platform_driver_register(&da9055_regulator_driver
);
630 subsys_initcall(da9055_regulator_init
);
632 static void __exit
da9055_regulator_exit(void)
634 platform_driver_unregister(&da9055_regulator_driver
);
636 module_exit(da9055_regulator_exit
);
638 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
639 MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC");
640 MODULE_LICENSE("GPL");
641 MODULE_ALIAS("platform:da9055-regulator");