2 * wm831x-dcdc.c -- DC-DC buck convertor driver for the WM831x series
4 * Copyright 2009 Wolfson Microelectronics PLC.
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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.
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/bitops.h>
18 #include <linux/err.h>
19 #include <linux/i2c.h>
20 #include <linux/platform_device.h>
21 #include <linux/regulator/driver.h>
22 #include <linux/regulator/machine.h>
23 #include <linux/gpio.h>
24 #include <linux/slab.h>
26 #include <linux/mfd/wm831x/core.h>
27 #include <linux/mfd/wm831x/regulator.h>
28 #include <linux/mfd/wm831x/pdata.h>
30 #define WM831X_BUCKV_MAX_SELECTOR 0x68
31 #define WM831X_BUCKP_MAX_SELECTOR 0x66
33 #define WM831X_DCDC_MODE_FAST 0
34 #define WM831X_DCDC_MODE_NORMAL 1
35 #define WM831X_DCDC_MODE_IDLE 2
36 #define WM831X_DCDC_MODE_STANDBY 3
38 #define WM831X_DCDC_MAX_NAME 9
40 /* Register offsets in control block */
41 #define WM831X_DCDC_CONTROL_1 0
42 #define WM831X_DCDC_CONTROL_2 1
43 #define WM831X_DCDC_ON_CONFIG 2
44 #define WM831X_DCDC_SLEEP_CONTROL 3
45 #define WM831X_DCDC_DVS_CONTROL 4
52 char name
[WM831X_DCDC_MAX_NAME
];
53 char supply_name
[WM831X_DCDC_MAX_NAME
];
54 struct regulator_desc desc
;
56 struct wm831x
*wm831x
;
57 struct regulator_dev
*regulator
;
64 static unsigned int wm831x_dcdc_get_mode(struct regulator_dev
*rdev
)
67 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
68 struct wm831x
*wm831x
= dcdc
->wm831x
;
69 u16 reg
= dcdc
->base
+ WM831X_DCDC_ON_CONFIG
;
72 val
= wm831x_reg_read(wm831x
, reg
);
76 val
= (val
& WM831X_DC1_ON_MODE_MASK
) >> WM831X_DC1_ON_MODE_SHIFT
;
79 case WM831X_DCDC_MODE_FAST
:
80 return REGULATOR_MODE_FAST
;
81 case WM831X_DCDC_MODE_NORMAL
:
82 return REGULATOR_MODE_NORMAL
;
83 case WM831X_DCDC_MODE_STANDBY
:
84 return REGULATOR_MODE_STANDBY
;
85 case WM831X_DCDC_MODE_IDLE
:
86 return REGULATOR_MODE_IDLE
;
93 static int wm831x_dcdc_set_mode_int(struct wm831x
*wm831x
, int reg
,
99 case REGULATOR_MODE_FAST
:
100 val
= WM831X_DCDC_MODE_FAST
;
102 case REGULATOR_MODE_NORMAL
:
103 val
= WM831X_DCDC_MODE_NORMAL
;
105 case REGULATOR_MODE_STANDBY
:
106 val
= WM831X_DCDC_MODE_STANDBY
;
108 case REGULATOR_MODE_IDLE
:
109 val
= WM831X_DCDC_MODE_IDLE
;
115 return wm831x_set_bits(wm831x
, reg
, WM831X_DC1_ON_MODE_MASK
,
116 val
<< WM831X_DC1_ON_MODE_SHIFT
);
119 static int wm831x_dcdc_set_mode(struct regulator_dev
*rdev
, unsigned int mode
)
121 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
122 struct wm831x
*wm831x
= dcdc
->wm831x
;
123 u16 reg
= dcdc
->base
+ WM831X_DCDC_ON_CONFIG
;
125 return wm831x_dcdc_set_mode_int(wm831x
, reg
, mode
);
128 static int wm831x_dcdc_set_suspend_mode(struct regulator_dev
*rdev
,
131 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
132 struct wm831x
*wm831x
= dcdc
->wm831x
;
133 u16 reg
= dcdc
->base
+ WM831X_DCDC_SLEEP_CONTROL
;
135 return wm831x_dcdc_set_mode_int(wm831x
, reg
, mode
);
138 static int wm831x_dcdc_get_status(struct regulator_dev
*rdev
)
140 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
141 struct wm831x
*wm831x
= dcdc
->wm831x
;
144 /* First, check for errors */
145 ret
= wm831x_reg_read(wm831x
, WM831X_DCDC_UV_STATUS
);
149 if (ret
& (1 << rdev_get_id(rdev
))) {
150 dev_dbg(wm831x
->dev
, "DCDC%d under voltage\n",
151 rdev_get_id(rdev
) + 1);
152 return REGULATOR_STATUS_ERROR
;
155 /* DCDC1 and DCDC2 can additionally detect high voltage/current */
156 if (rdev_get_id(rdev
) < 2) {
157 if (ret
& (WM831X_DC1_OV_STS
<< rdev_get_id(rdev
))) {
158 dev_dbg(wm831x
->dev
, "DCDC%d over voltage\n",
159 rdev_get_id(rdev
) + 1);
160 return REGULATOR_STATUS_ERROR
;
163 if (ret
& (WM831X_DC1_HC_STS
<< rdev_get_id(rdev
))) {
164 dev_dbg(wm831x
->dev
, "DCDC%d over current\n",
165 rdev_get_id(rdev
) + 1);
166 return REGULATOR_STATUS_ERROR
;
170 /* Is the regulator on? */
171 ret
= wm831x_reg_read(wm831x
, WM831X_DCDC_STATUS
);
174 if (!(ret
& (1 << rdev_get_id(rdev
))))
175 return REGULATOR_STATUS_OFF
;
177 /* TODO: When we handle hardware control modes so we can report the
179 return REGULATOR_STATUS_ON
;
182 static irqreturn_t
wm831x_dcdc_uv_irq(int irq
, void *data
)
184 struct wm831x_dcdc
*dcdc
= data
;
186 regulator_notifier_call_chain(dcdc
->regulator
,
187 REGULATOR_EVENT_UNDER_VOLTAGE
,
193 static irqreturn_t
wm831x_dcdc_oc_irq(int irq
, void *data
)
195 struct wm831x_dcdc
*dcdc
= data
;
197 regulator_notifier_call_chain(dcdc
->regulator
,
198 REGULATOR_EVENT_OVER_CURRENT
,
208 static int wm831x_buckv_list_voltage(struct regulator_dev
*rdev
,
213 if (selector
<= WM831X_BUCKV_MAX_SELECTOR
)
214 return 600000 + ((selector
- 0x8) * 12500);
218 static int wm831x_buckv_select_min_voltage(struct regulator_dev
*rdev
,
219 int min_uV
, int max_uV
)
225 else if (min_uV
<= 1800000)
226 vsel
= ((min_uV
- 600000) / 12500) + 8;
230 if (wm831x_buckv_list_voltage(rdev
, vsel
) > max_uV
)
236 static int wm831x_buckv_set_dvs(struct regulator_dev
*rdev
, int state
)
238 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
240 if (state
== dcdc
->dvs_gpio_state
)
243 dcdc
->dvs_gpio_state
= state
;
244 gpio_set_value(dcdc
->dvs_gpio
, state
);
246 /* Should wait for DVS state change to be asserted if we have
247 * a GPIO for it, for now assume the device is configured
248 * for the fastest possible transition.
254 static int wm831x_buckv_set_voltage(struct regulator_dev
*rdev
,
255 int min_uV
, int max_uV
, unsigned *selector
)
257 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
258 struct wm831x
*wm831x
= dcdc
->wm831x
;
259 int on_reg
= dcdc
->base
+ WM831X_DCDC_ON_CONFIG
;
260 int dvs_reg
= dcdc
->base
+ WM831X_DCDC_DVS_CONTROL
;
263 vsel
= wm831x_buckv_select_min_voltage(rdev
, min_uV
, max_uV
);
269 /* If this value is already set then do a GPIO update if we can */
270 if (dcdc
->dvs_gpio
&& dcdc
->on_vsel
== vsel
)
271 return wm831x_buckv_set_dvs(rdev
, 0);
273 if (dcdc
->dvs_gpio
&& dcdc
->dvs_vsel
== vsel
)
274 return wm831x_buckv_set_dvs(rdev
, 1);
276 /* Always set the ON status to the minimum voltage */
277 ret
= wm831x_set_bits(wm831x
, on_reg
, WM831X_DC1_ON_VSEL_MASK
, vsel
);
280 dcdc
->on_vsel
= vsel
;
285 /* Kick the voltage transition now */
286 ret
= wm831x_buckv_set_dvs(rdev
, 0);
291 * If this VSEL is higher than the last one we've seen then
292 * remember it as the DVS VSEL. This is optimised for CPUfreq
293 * usage where we want to get to the highest voltage very
296 if (vsel
> dcdc
->dvs_vsel
) {
297 ret
= wm831x_set_bits(wm831x
, dvs_reg
,
298 WM831X_DC1_DVS_VSEL_MASK
,
301 dcdc
->dvs_vsel
= vsel
;
303 dev_warn(wm831x
->dev
,
304 "Failed to set DCDC DVS VSEL: %d\n", ret
);
310 static int wm831x_buckv_set_suspend_voltage(struct regulator_dev
*rdev
,
313 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
314 struct wm831x
*wm831x
= dcdc
->wm831x
;
315 u16 reg
= dcdc
->base
+ WM831X_DCDC_SLEEP_CONTROL
;
318 vsel
= wm831x_buckv_select_min_voltage(rdev
, uV
, uV
);
322 return wm831x_set_bits(wm831x
, reg
, WM831X_DC1_SLP_VSEL_MASK
, vsel
);
325 static int wm831x_buckv_get_voltage_sel(struct regulator_dev
*rdev
)
327 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
329 if (dcdc
->dvs_gpio
&& dcdc
->dvs_gpio_state
)
330 return dcdc
->dvs_vsel
;
332 return dcdc
->on_vsel
;
335 /* Current limit options */
336 static u16 wm831x_dcdc_ilim
[] = {
337 125, 250, 375, 500, 625, 750, 875, 1000
340 static int wm831x_buckv_set_current_limit(struct regulator_dev
*rdev
,
341 int min_uA
, int max_uA
)
343 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
344 struct wm831x
*wm831x
= dcdc
->wm831x
;
345 u16 reg
= dcdc
->base
+ WM831X_DCDC_CONTROL_2
;
348 for (i
= 0; i
< ARRAY_SIZE(wm831x_dcdc_ilim
); i
++) {
349 if ((min_uA
<= wm831x_dcdc_ilim
[i
]) &&
350 (wm831x_dcdc_ilim
[i
] <= max_uA
))
353 if (i
== ARRAY_SIZE(wm831x_dcdc_ilim
))
356 return wm831x_set_bits(wm831x
, reg
, WM831X_DC1_HC_THR_MASK
,
357 i
<< WM831X_DC1_HC_THR_SHIFT
);
360 static int wm831x_buckv_get_current_limit(struct regulator_dev
*rdev
)
362 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
363 struct wm831x
*wm831x
= dcdc
->wm831x
;
364 u16 reg
= dcdc
->base
+ WM831X_DCDC_CONTROL_2
;
367 val
= wm831x_reg_read(wm831x
, reg
);
371 val
= (val
& WM831X_DC1_HC_THR_MASK
) >> WM831X_DC1_HC_THR_SHIFT
;
372 return wm831x_dcdc_ilim
[val
];
375 static struct regulator_ops wm831x_buckv_ops
= {
376 .set_voltage
= wm831x_buckv_set_voltage
,
377 .get_voltage_sel
= wm831x_buckv_get_voltage_sel
,
378 .list_voltage
= wm831x_buckv_list_voltage
,
379 .set_suspend_voltage
= wm831x_buckv_set_suspend_voltage
,
380 .set_current_limit
= wm831x_buckv_set_current_limit
,
381 .get_current_limit
= wm831x_buckv_get_current_limit
,
383 .is_enabled
= regulator_is_enabled_regmap
,
384 .enable
= regulator_enable_regmap
,
385 .disable
= regulator_disable_regmap
,
386 .get_status
= wm831x_dcdc_get_status
,
387 .get_mode
= wm831x_dcdc_get_mode
,
388 .set_mode
= wm831x_dcdc_set_mode
,
389 .set_suspend_mode
= wm831x_dcdc_set_suspend_mode
,
393 * Set up DVS control. We just log errors since we can still run
394 * (with reduced performance) if we fail.
396 static __devinit
void wm831x_buckv_dvs_init(struct wm831x_dcdc
*dcdc
,
397 struct wm831x_buckv_pdata
*pdata
)
399 struct wm831x
*wm831x
= dcdc
->wm831x
;
403 if (!pdata
|| !pdata
->dvs_gpio
)
406 /* gpiolib won't let us read the GPIO status so pick the higher
407 * of the two existing voltages so we take it as platform data.
409 dcdc
->dvs_gpio_state
= pdata
->dvs_init_state
;
411 ret
= gpio_request_one(pdata
->dvs_gpio
,
412 dcdc
->dvs_gpio_state
? GPIOF_INIT_HIGH
: 0,
415 dev_err(wm831x
->dev
, "Failed to get %s DVS GPIO: %d\n",
420 dcdc
->dvs_gpio
= pdata
->dvs_gpio
;
422 switch (pdata
->dvs_control_src
) {
424 ctrl
= 2 << WM831X_DC1_DVS_SRC_SHIFT
;
427 ctrl
= 3 << WM831X_DC1_DVS_SRC_SHIFT
;
430 dev_err(wm831x
->dev
, "Invalid DVS control source %d for %s\n",
431 pdata
->dvs_control_src
, dcdc
->name
);
435 /* If DVS_VSEL is set to the minimum value then raise it to ON_VSEL
436 * to make bootstrapping a bit smoother.
438 if (!dcdc
->dvs_vsel
) {
439 ret
= wm831x_set_bits(wm831x
,
440 dcdc
->base
+ WM831X_DCDC_DVS_CONTROL
,
441 WM831X_DC1_DVS_VSEL_MASK
, dcdc
->on_vsel
);
443 dcdc
->dvs_vsel
= dcdc
->on_vsel
;
445 dev_warn(wm831x
->dev
, "Failed to set DVS_VSEL: %d\n",
449 ret
= wm831x_set_bits(wm831x
, dcdc
->base
+ WM831X_DCDC_DVS_CONTROL
,
450 WM831X_DC1_DVS_SRC_MASK
, ctrl
);
452 dev_err(wm831x
->dev
, "Failed to set %s DVS source: %d\n",
457 static __devinit
int wm831x_buckv_probe(struct platform_device
*pdev
)
459 struct wm831x
*wm831x
= dev_get_drvdata(pdev
->dev
.parent
);
460 struct wm831x_pdata
*pdata
= wm831x
->dev
->platform_data
;
461 struct regulator_config config
= { };
463 struct wm831x_dcdc
*dcdc
;
464 struct resource
*res
;
467 if (pdata
&& pdata
->wm831x_num
)
468 id
= (pdata
->wm831x_num
* 10) + 1;
473 dev_dbg(&pdev
->dev
, "Probing DCDC%d\n", id
+ 1);
475 dcdc
= devm_kzalloc(&pdev
->dev
, sizeof(struct wm831x_dcdc
),
478 dev_err(&pdev
->dev
, "Unable to allocate private data\n");
482 dcdc
->wm831x
= wm831x
;
484 res
= platform_get_resource(pdev
, IORESOURCE_IO
, 0);
486 dev_err(&pdev
->dev
, "No I/O resource\n");
490 dcdc
->base
= res
->start
;
492 snprintf(dcdc
->name
, sizeof(dcdc
->name
), "DCDC%d", id
+ 1);
493 dcdc
->desc
.name
= dcdc
->name
;
495 snprintf(dcdc
->supply_name
, sizeof(dcdc
->supply_name
),
497 dcdc
->desc
.supply_name
= dcdc
->supply_name
;
500 dcdc
->desc
.type
= REGULATOR_VOLTAGE
;
501 dcdc
->desc
.n_voltages
= WM831X_BUCKV_MAX_SELECTOR
+ 1;
502 dcdc
->desc
.ops
= &wm831x_buckv_ops
;
503 dcdc
->desc
.owner
= THIS_MODULE
;
504 dcdc
->desc
.enable_reg
= WM831X_DCDC_ENABLE
;
505 dcdc
->desc
.enable_mask
= 1 << id
;
507 ret
= wm831x_reg_read(wm831x
, dcdc
->base
+ WM831X_DCDC_ON_CONFIG
);
509 dev_err(wm831x
->dev
, "Failed to read ON VSEL: %d\n", ret
);
512 dcdc
->on_vsel
= ret
& WM831X_DC1_ON_VSEL_MASK
;
514 ret
= wm831x_reg_read(wm831x
, dcdc
->base
+ WM831X_DCDC_DVS_CONTROL
);
516 dev_err(wm831x
->dev
, "Failed to read DVS VSEL: %d\n", ret
);
519 dcdc
->dvs_vsel
= ret
& WM831X_DC1_DVS_VSEL_MASK
;
521 if (pdata
&& pdata
->dcdc
[id
])
522 wm831x_buckv_dvs_init(dcdc
, pdata
->dcdc
[id
]->driver_data
);
524 config
.dev
= pdev
->dev
.parent
;
526 config
.init_data
= pdata
->dcdc
[id
];
527 config
.driver_data
= dcdc
;
528 config
.regmap
= wm831x
->regmap
;
530 dcdc
->regulator
= regulator_register(&dcdc
->desc
, &config
);
531 if (IS_ERR(dcdc
->regulator
)) {
532 ret
= PTR_ERR(dcdc
->regulator
);
533 dev_err(wm831x
->dev
, "Failed to register DCDC%d: %d\n",
538 irq
= platform_get_irq_byname(pdev
, "UV");
539 ret
= request_threaded_irq(irq
, NULL
, wm831x_dcdc_uv_irq
,
540 IRQF_TRIGGER_RISING
, dcdc
->name
, dcdc
);
542 dev_err(&pdev
->dev
, "Failed to request UV IRQ %d: %d\n",
547 irq
= platform_get_irq_byname(pdev
, "HC");
548 ret
= request_threaded_irq(irq
, NULL
, wm831x_dcdc_oc_irq
,
549 IRQF_TRIGGER_RISING
, dcdc
->name
, dcdc
);
551 dev_err(&pdev
->dev
, "Failed to request HC IRQ %d: %d\n",
556 platform_set_drvdata(pdev
, dcdc
);
561 free_irq(platform_get_irq_byname(pdev
, "UV"), dcdc
);
563 regulator_unregister(dcdc
->regulator
);
566 gpio_free(dcdc
->dvs_gpio
);
570 static __devexit
int wm831x_buckv_remove(struct platform_device
*pdev
)
572 struct wm831x_dcdc
*dcdc
= platform_get_drvdata(pdev
);
574 platform_set_drvdata(pdev
, NULL
);
576 free_irq(platform_get_irq_byname(pdev
, "HC"), dcdc
);
577 free_irq(platform_get_irq_byname(pdev
, "UV"), dcdc
);
578 regulator_unregister(dcdc
->regulator
);
580 gpio_free(dcdc
->dvs_gpio
);
585 static struct platform_driver wm831x_buckv_driver
= {
586 .probe
= wm831x_buckv_probe
,
587 .remove
= __devexit_p(wm831x_buckv_remove
),
589 .name
= "wm831x-buckv",
590 .owner
= THIS_MODULE
,
598 static int wm831x_buckp_list_voltage(struct regulator_dev
*rdev
,
601 if (selector
<= WM831X_BUCKP_MAX_SELECTOR
)
602 return 850000 + (selector
* 25000);
607 static int wm831x_buckp_set_voltage_int(struct regulator_dev
*rdev
, int reg
,
608 int min_uV
, int max_uV
, int *selector
)
610 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
611 struct wm831x
*wm831x
= dcdc
->wm831x
;
614 if (min_uV
<= 34000000)
615 vsel
= (min_uV
- 850000) / 25000;
619 if (wm831x_buckp_list_voltage(rdev
, vsel
) > max_uV
)
624 return wm831x_set_bits(wm831x
, reg
, WM831X_DC3_ON_VSEL_MASK
, vsel
);
627 static int wm831x_buckp_set_voltage(struct regulator_dev
*rdev
,
628 int min_uV
, int max_uV
,
631 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
632 u16 reg
= dcdc
->base
+ WM831X_DCDC_ON_CONFIG
;
634 return wm831x_buckp_set_voltage_int(rdev
, reg
, min_uV
, max_uV
,
638 static int wm831x_buckp_set_suspend_voltage(struct regulator_dev
*rdev
,
641 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
642 u16 reg
= dcdc
->base
+ WM831X_DCDC_SLEEP_CONTROL
;
645 return wm831x_buckp_set_voltage_int(rdev
, reg
, uV
, uV
, &selector
);
648 static struct regulator_ops wm831x_buckp_ops
= {
649 .set_voltage
= wm831x_buckp_set_voltage
,
650 .get_voltage_sel
= regulator_get_voltage_sel_regmap
,
651 .list_voltage
= wm831x_buckp_list_voltage
,
652 .set_suspend_voltage
= wm831x_buckp_set_suspend_voltage
,
654 .is_enabled
= regulator_is_enabled_regmap
,
655 .enable
= regulator_enable_regmap
,
656 .disable
= regulator_disable_regmap
,
657 .get_status
= wm831x_dcdc_get_status
,
658 .get_mode
= wm831x_dcdc_get_mode
,
659 .set_mode
= wm831x_dcdc_set_mode
,
660 .set_suspend_mode
= wm831x_dcdc_set_suspend_mode
,
663 static __devinit
int wm831x_buckp_probe(struct platform_device
*pdev
)
665 struct wm831x
*wm831x
= dev_get_drvdata(pdev
->dev
.parent
);
666 struct wm831x_pdata
*pdata
= wm831x
->dev
->platform_data
;
667 struct regulator_config config
= { };
669 struct wm831x_dcdc
*dcdc
;
670 struct resource
*res
;
673 if (pdata
&& pdata
->wm831x_num
)
674 id
= (pdata
->wm831x_num
* 10) + 1;
679 dev_dbg(&pdev
->dev
, "Probing DCDC%d\n", id
+ 1);
681 dcdc
= devm_kzalloc(&pdev
->dev
, sizeof(struct wm831x_dcdc
),
684 dev_err(&pdev
->dev
, "Unable to allocate private data\n");
688 dcdc
->wm831x
= wm831x
;
690 res
= platform_get_resource(pdev
, IORESOURCE_IO
, 0);
692 dev_err(&pdev
->dev
, "No I/O resource\n");
696 dcdc
->base
= res
->start
;
698 snprintf(dcdc
->name
, sizeof(dcdc
->name
), "DCDC%d", id
+ 1);
699 dcdc
->desc
.name
= dcdc
->name
;
701 snprintf(dcdc
->supply_name
, sizeof(dcdc
->supply_name
),
703 dcdc
->desc
.supply_name
= dcdc
->supply_name
;
706 dcdc
->desc
.type
= REGULATOR_VOLTAGE
;
707 dcdc
->desc
.n_voltages
= WM831X_BUCKP_MAX_SELECTOR
+ 1;
708 dcdc
->desc
.ops
= &wm831x_buckp_ops
;
709 dcdc
->desc
.owner
= THIS_MODULE
;
710 dcdc
->desc
.vsel_reg
= dcdc
->base
+ WM831X_DCDC_ON_CONFIG
;
711 dcdc
->desc
.vsel_mask
= WM831X_DC3_ON_VSEL_MASK
;
712 dcdc
->desc
.enable_reg
= WM831X_DCDC_ENABLE
;
713 dcdc
->desc
.enable_mask
= 1 << id
;
715 config
.dev
= pdev
->dev
.parent
;
717 config
.init_data
= pdata
->dcdc
[id
];
718 config
.driver_data
= dcdc
;
719 config
.regmap
= wm831x
->regmap
;
721 dcdc
->regulator
= regulator_register(&dcdc
->desc
, &config
);
722 if (IS_ERR(dcdc
->regulator
)) {
723 ret
= PTR_ERR(dcdc
->regulator
);
724 dev_err(wm831x
->dev
, "Failed to register DCDC%d: %d\n",
729 irq
= platform_get_irq_byname(pdev
, "UV");
730 ret
= request_threaded_irq(irq
, NULL
, wm831x_dcdc_uv_irq
,
731 IRQF_TRIGGER_RISING
, dcdc
->name
, dcdc
);
733 dev_err(&pdev
->dev
, "Failed to request UV IRQ %d: %d\n",
738 platform_set_drvdata(pdev
, dcdc
);
743 regulator_unregister(dcdc
->regulator
);
748 static __devexit
int wm831x_buckp_remove(struct platform_device
*pdev
)
750 struct wm831x_dcdc
*dcdc
= platform_get_drvdata(pdev
);
752 platform_set_drvdata(pdev
, NULL
);
754 free_irq(platform_get_irq_byname(pdev
, "UV"), dcdc
);
755 regulator_unregister(dcdc
->regulator
);
760 static struct platform_driver wm831x_buckp_driver
= {
761 .probe
= wm831x_buckp_probe
,
762 .remove
= __devexit_p(wm831x_buckp_remove
),
764 .name
= "wm831x-buckp",
765 .owner
= THIS_MODULE
,
770 * DCDC boost convertors
773 static int wm831x_boostp_get_status(struct regulator_dev
*rdev
)
775 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
776 struct wm831x
*wm831x
= dcdc
->wm831x
;
779 /* First, check for errors */
780 ret
= wm831x_reg_read(wm831x
, WM831X_DCDC_UV_STATUS
);
784 if (ret
& (1 << rdev_get_id(rdev
))) {
785 dev_dbg(wm831x
->dev
, "DCDC%d under voltage\n",
786 rdev_get_id(rdev
) + 1);
787 return REGULATOR_STATUS_ERROR
;
790 /* Is the regulator on? */
791 ret
= wm831x_reg_read(wm831x
, WM831X_DCDC_STATUS
);
794 if (ret
& (1 << rdev_get_id(rdev
)))
795 return REGULATOR_STATUS_ON
;
797 return REGULATOR_STATUS_OFF
;
800 static struct regulator_ops wm831x_boostp_ops
= {
801 .get_status
= wm831x_boostp_get_status
,
803 .is_enabled
= regulator_is_enabled_regmap
,
804 .enable
= regulator_enable_regmap
,
805 .disable
= regulator_disable_regmap
,
808 static __devinit
int wm831x_boostp_probe(struct platform_device
*pdev
)
810 struct wm831x
*wm831x
= dev_get_drvdata(pdev
->dev
.parent
);
811 struct wm831x_pdata
*pdata
= wm831x
->dev
->platform_data
;
812 struct regulator_config config
= { };
813 int id
= pdev
->id
% ARRAY_SIZE(pdata
->dcdc
);
814 struct wm831x_dcdc
*dcdc
;
815 struct resource
*res
;
818 dev_dbg(&pdev
->dev
, "Probing DCDC%d\n", id
+ 1);
820 if (pdata
== NULL
|| pdata
->dcdc
[id
] == NULL
)
823 dcdc
= devm_kzalloc(&pdev
->dev
, sizeof(struct wm831x_dcdc
), GFP_KERNEL
);
825 dev_err(&pdev
->dev
, "Unable to allocate private data\n");
829 dcdc
->wm831x
= wm831x
;
831 res
= platform_get_resource(pdev
, IORESOURCE_IO
, 0);
833 dev_err(&pdev
->dev
, "No I/O resource\n");
837 dcdc
->base
= res
->start
;
839 snprintf(dcdc
->name
, sizeof(dcdc
->name
), "DCDC%d", id
+ 1);
840 dcdc
->desc
.name
= dcdc
->name
;
842 dcdc
->desc
.type
= REGULATOR_VOLTAGE
;
843 dcdc
->desc
.ops
= &wm831x_boostp_ops
;
844 dcdc
->desc
.owner
= THIS_MODULE
;
845 dcdc
->desc
.enable_reg
= WM831X_DCDC_ENABLE
;
846 dcdc
->desc
.enable_mask
= 1 << id
;
848 config
.dev
= pdev
->dev
.parent
;
850 config
.init_data
= pdata
->dcdc
[id
];
851 config
.driver_data
= dcdc
;
852 config
.regmap
= wm831x
->regmap
;
854 dcdc
->regulator
= regulator_register(&dcdc
->desc
, &config
);
855 if (IS_ERR(dcdc
->regulator
)) {
856 ret
= PTR_ERR(dcdc
->regulator
);
857 dev_err(wm831x
->dev
, "Failed to register DCDC%d: %d\n",
862 irq
= platform_get_irq_byname(pdev
, "UV");
863 ret
= request_threaded_irq(irq
, NULL
, wm831x_dcdc_uv_irq
,
864 IRQF_TRIGGER_RISING
, dcdc
->name
,
867 dev_err(&pdev
->dev
, "Failed to request UV IRQ %d: %d\n",
872 platform_set_drvdata(pdev
, dcdc
);
877 regulator_unregister(dcdc
->regulator
);
882 static __devexit
int wm831x_boostp_remove(struct platform_device
*pdev
)
884 struct wm831x_dcdc
*dcdc
= platform_get_drvdata(pdev
);
886 platform_set_drvdata(pdev
, NULL
);
888 free_irq(platform_get_irq_byname(pdev
, "UV"), dcdc
);
889 regulator_unregister(dcdc
->regulator
);
894 static struct platform_driver wm831x_boostp_driver
= {
895 .probe
= wm831x_boostp_probe
,
896 .remove
= __devexit_p(wm831x_boostp_remove
),
898 .name
= "wm831x-boostp",
899 .owner
= THIS_MODULE
,
904 * External Power Enable
906 * These aren't actually DCDCs but look like them in hardware so share
910 #define WM831X_EPE_BASE 6
912 static struct regulator_ops wm831x_epe_ops
= {
913 .is_enabled
= regulator_is_enabled_regmap
,
914 .enable
= regulator_enable_regmap
,
915 .disable
= regulator_disable_regmap
,
916 .get_status
= wm831x_dcdc_get_status
,
919 static __devinit
int wm831x_epe_probe(struct platform_device
*pdev
)
921 struct wm831x
*wm831x
= dev_get_drvdata(pdev
->dev
.parent
);
922 struct wm831x_pdata
*pdata
= wm831x
->dev
->platform_data
;
923 struct regulator_config config
= { };
924 int id
= pdev
->id
% ARRAY_SIZE(pdata
->epe
);
925 struct wm831x_dcdc
*dcdc
;
928 dev_dbg(&pdev
->dev
, "Probing EPE%d\n", id
+ 1);
930 dcdc
= devm_kzalloc(&pdev
->dev
, sizeof(struct wm831x_dcdc
), GFP_KERNEL
);
932 dev_err(&pdev
->dev
, "Unable to allocate private data\n");
936 dcdc
->wm831x
= wm831x
;
938 /* For current parts this is correct; probably need to revisit
941 snprintf(dcdc
->name
, sizeof(dcdc
->name
), "EPE%d", id
+ 1);
942 dcdc
->desc
.name
= dcdc
->name
;
943 dcdc
->desc
.id
= id
+ WM831X_EPE_BASE
; /* Offset in DCDC registers */
944 dcdc
->desc
.ops
= &wm831x_epe_ops
;
945 dcdc
->desc
.type
= REGULATOR_VOLTAGE
;
946 dcdc
->desc
.owner
= THIS_MODULE
;
947 dcdc
->desc
.enable_reg
= WM831X_DCDC_ENABLE
;
948 dcdc
->desc
.enable_mask
= 1 << dcdc
->desc
.id
;
950 config
.dev
= pdev
->dev
.parent
;
952 config
.init_data
= pdata
->epe
[id
];
953 config
.driver_data
= dcdc
;
954 config
.regmap
= wm831x
->regmap
;
956 dcdc
->regulator
= regulator_register(&dcdc
->desc
, &config
);
957 if (IS_ERR(dcdc
->regulator
)) {
958 ret
= PTR_ERR(dcdc
->regulator
);
959 dev_err(wm831x
->dev
, "Failed to register EPE%d: %d\n",
964 platform_set_drvdata(pdev
, dcdc
);
972 static __devexit
int wm831x_epe_remove(struct platform_device
*pdev
)
974 struct wm831x_dcdc
*dcdc
= platform_get_drvdata(pdev
);
976 platform_set_drvdata(pdev
, NULL
);
977 regulator_unregister(dcdc
->regulator
);
982 static struct platform_driver wm831x_epe_driver
= {
983 .probe
= wm831x_epe_probe
,
984 .remove
= __devexit_p(wm831x_epe_remove
),
986 .name
= "wm831x-epe",
987 .owner
= THIS_MODULE
,
991 static int __init
wm831x_dcdc_init(void)
994 ret
= platform_driver_register(&wm831x_buckv_driver
);
996 pr_err("Failed to register WM831x BUCKV driver: %d\n", ret
);
998 ret
= platform_driver_register(&wm831x_buckp_driver
);
1000 pr_err("Failed to register WM831x BUCKP driver: %d\n", ret
);
1002 ret
= platform_driver_register(&wm831x_boostp_driver
);
1004 pr_err("Failed to register WM831x BOOST driver: %d\n", ret
);
1006 ret
= platform_driver_register(&wm831x_epe_driver
);
1008 pr_err("Failed to register WM831x EPE driver: %d\n", ret
);
1012 subsys_initcall(wm831x_dcdc_init
);
1014 static void __exit
wm831x_dcdc_exit(void)
1016 platform_driver_unregister(&wm831x_epe_driver
);
1017 platform_driver_unregister(&wm831x_boostp_driver
);
1018 platform_driver_unregister(&wm831x_buckp_driver
);
1019 platform_driver_unregister(&wm831x_buckv_driver
);
1021 module_exit(wm831x_dcdc_exit
);
1023 /* Module information */
1024 MODULE_AUTHOR("Mark Brown");
1025 MODULE_DESCRIPTION("WM831x DC-DC convertor driver");
1026 MODULE_LICENSE("GPL");
1027 MODULE_ALIAS("platform:wm831x-buckv");
1028 MODULE_ALIAS("platform:wm831x-buckp");
1029 MODULE_ALIAS("platform:wm831x-epe");