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 6
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 struct regulator_desc desc
;
55 struct wm831x
*wm831x
;
56 struct regulator_dev
*regulator
;
63 static int wm831x_dcdc_is_enabled(struct regulator_dev
*rdev
)
65 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
66 struct wm831x
*wm831x
= dcdc
->wm831x
;
67 int mask
= 1 << rdev_get_id(rdev
);
70 reg
= wm831x_reg_read(wm831x
, WM831X_DCDC_ENABLE
);
80 static int wm831x_dcdc_enable(struct regulator_dev
*rdev
)
82 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
83 struct wm831x
*wm831x
= dcdc
->wm831x
;
84 int mask
= 1 << rdev_get_id(rdev
);
86 return wm831x_set_bits(wm831x
, WM831X_DCDC_ENABLE
, mask
, mask
);
89 static int wm831x_dcdc_disable(struct regulator_dev
*rdev
)
91 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
92 struct wm831x
*wm831x
= dcdc
->wm831x
;
93 int mask
= 1 << rdev_get_id(rdev
);
95 return wm831x_set_bits(wm831x
, WM831X_DCDC_ENABLE
, mask
, 0);
98 static unsigned int wm831x_dcdc_get_mode(struct regulator_dev
*rdev
)
101 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
102 struct wm831x
*wm831x
= dcdc
->wm831x
;
103 u16 reg
= dcdc
->base
+ WM831X_DCDC_ON_CONFIG
;
106 val
= wm831x_reg_read(wm831x
, reg
);
110 val
= (val
& WM831X_DC1_ON_MODE_MASK
) >> WM831X_DC1_ON_MODE_SHIFT
;
113 case WM831X_DCDC_MODE_FAST
:
114 return REGULATOR_MODE_FAST
;
115 case WM831X_DCDC_MODE_NORMAL
:
116 return REGULATOR_MODE_NORMAL
;
117 case WM831X_DCDC_MODE_STANDBY
:
118 return REGULATOR_MODE_STANDBY
;
119 case WM831X_DCDC_MODE_IDLE
:
120 return REGULATOR_MODE_IDLE
;
127 static int wm831x_dcdc_set_mode_int(struct wm831x
*wm831x
, int reg
,
133 case REGULATOR_MODE_FAST
:
134 val
= WM831X_DCDC_MODE_FAST
;
136 case REGULATOR_MODE_NORMAL
:
137 val
= WM831X_DCDC_MODE_NORMAL
;
139 case REGULATOR_MODE_STANDBY
:
140 val
= WM831X_DCDC_MODE_STANDBY
;
142 case REGULATOR_MODE_IDLE
:
143 val
= WM831X_DCDC_MODE_IDLE
;
149 return wm831x_set_bits(wm831x
, reg
, WM831X_DC1_ON_MODE_MASK
,
150 val
<< WM831X_DC1_ON_MODE_SHIFT
);
153 static int wm831x_dcdc_set_mode(struct regulator_dev
*rdev
, unsigned int mode
)
155 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
156 struct wm831x
*wm831x
= dcdc
->wm831x
;
157 u16 reg
= dcdc
->base
+ WM831X_DCDC_ON_CONFIG
;
159 return wm831x_dcdc_set_mode_int(wm831x
, reg
, mode
);
162 static int wm831x_dcdc_set_suspend_mode(struct regulator_dev
*rdev
,
165 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
166 struct wm831x
*wm831x
= dcdc
->wm831x
;
167 u16 reg
= dcdc
->base
+ WM831X_DCDC_SLEEP_CONTROL
;
169 return wm831x_dcdc_set_mode_int(wm831x
, reg
, mode
);
172 static int wm831x_dcdc_get_status(struct regulator_dev
*rdev
)
174 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
175 struct wm831x
*wm831x
= dcdc
->wm831x
;
178 /* First, check for errors */
179 ret
= wm831x_reg_read(wm831x
, WM831X_DCDC_UV_STATUS
);
183 if (ret
& (1 << rdev_get_id(rdev
))) {
184 dev_dbg(wm831x
->dev
, "DCDC%d under voltage\n",
185 rdev_get_id(rdev
) + 1);
186 return REGULATOR_STATUS_ERROR
;
189 /* DCDC1 and DCDC2 can additionally detect high voltage/current */
190 if (rdev_get_id(rdev
) < 2) {
191 if (ret
& (WM831X_DC1_OV_STS
<< rdev_get_id(rdev
))) {
192 dev_dbg(wm831x
->dev
, "DCDC%d over voltage\n",
193 rdev_get_id(rdev
) + 1);
194 return REGULATOR_STATUS_ERROR
;
197 if (ret
& (WM831X_DC1_HC_STS
<< rdev_get_id(rdev
))) {
198 dev_dbg(wm831x
->dev
, "DCDC%d over current\n",
199 rdev_get_id(rdev
) + 1);
200 return REGULATOR_STATUS_ERROR
;
204 /* Is the regulator on? */
205 ret
= wm831x_reg_read(wm831x
, WM831X_DCDC_STATUS
);
208 if (!(ret
& (1 << rdev_get_id(rdev
))))
209 return REGULATOR_STATUS_OFF
;
211 /* TODO: When we handle hardware control modes so we can report the
213 return REGULATOR_STATUS_ON
;
216 static irqreturn_t
wm831x_dcdc_uv_irq(int irq
, void *data
)
218 struct wm831x_dcdc
*dcdc
= data
;
220 regulator_notifier_call_chain(dcdc
->regulator
,
221 REGULATOR_EVENT_UNDER_VOLTAGE
,
227 static irqreturn_t
wm831x_dcdc_oc_irq(int irq
, void *data
)
229 struct wm831x_dcdc
*dcdc
= data
;
231 regulator_notifier_call_chain(dcdc
->regulator
,
232 REGULATOR_EVENT_OVER_CURRENT
,
242 static int wm831x_buckv_list_voltage(struct regulator_dev
*rdev
,
247 if (selector
<= WM831X_BUCKV_MAX_SELECTOR
)
248 return 600000 + ((selector
- 0x8) * 12500);
252 static int wm831x_buckv_select_min_voltage(struct regulator_dev
*rdev
,
253 int min_uV
, int max_uV
)
259 else if (min_uV
<= 1800000)
260 vsel
= ((min_uV
- 600000) / 12500) + 8;
264 if (wm831x_buckv_list_voltage(rdev
, vsel
) > max_uV
)
270 static int wm831x_buckv_select_max_voltage(struct regulator_dev
*rdev
,
271 int min_uV
, int max_uV
)
275 if (max_uV
< 600000 || max_uV
> 1800000)
278 vsel
= ((max_uV
- 600000) / 12500) + 8;
280 if (wm831x_buckv_list_voltage(rdev
, vsel
) < min_uV
||
281 wm831x_buckv_list_voltage(rdev
, vsel
) < max_uV
)
287 static int wm831x_buckv_set_dvs(struct regulator_dev
*rdev
, int state
)
289 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
291 if (state
== dcdc
->dvs_gpio_state
)
294 dcdc
->dvs_gpio_state
= state
;
295 gpio_set_value(dcdc
->dvs_gpio
, state
);
297 /* Should wait for DVS state change to be asserted if we have
298 * a GPIO for it, for now assume the device is configured
299 * for the fastest possible transition.
305 static int wm831x_buckv_set_voltage(struct regulator_dev
*rdev
,
306 int min_uV
, int max_uV
, unsigned *selector
)
308 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
309 struct wm831x
*wm831x
= dcdc
->wm831x
;
310 int on_reg
= dcdc
->base
+ WM831X_DCDC_ON_CONFIG
;
311 int dvs_reg
= dcdc
->base
+ WM831X_DCDC_DVS_CONTROL
;
314 vsel
= wm831x_buckv_select_min_voltage(rdev
, min_uV
, max_uV
);
320 /* If this value is already set then do a GPIO update if we can */
321 if (dcdc
->dvs_gpio
&& dcdc
->on_vsel
== vsel
)
322 return wm831x_buckv_set_dvs(rdev
, 0);
324 if (dcdc
->dvs_gpio
&& dcdc
->dvs_vsel
== vsel
)
325 return wm831x_buckv_set_dvs(rdev
, 1);
327 /* Always set the ON status to the minimum voltage */
328 ret
= wm831x_set_bits(wm831x
, on_reg
, WM831X_DC1_ON_VSEL_MASK
, vsel
);
331 dcdc
->on_vsel
= vsel
;
336 /* Kick the voltage transition now */
337 ret
= wm831x_buckv_set_dvs(rdev
, 0);
341 /* Set the high voltage as the DVS voltage. This is optimised
342 * for CPUfreq usage, most processors will keep the maximum
343 * voltage constant and lower the minimum with the frequency. */
344 vsel
= wm831x_buckv_select_max_voltage(rdev
, min_uV
, max_uV
);
346 /* This should never happen - at worst the same vsel
347 * should be chosen */
352 /* Don't bother if it's the same VSEL we're already using */
353 if (vsel
== dcdc
->on_vsel
)
356 ret
= wm831x_set_bits(wm831x
, dvs_reg
, WM831X_DC1_DVS_VSEL_MASK
, vsel
);
358 dcdc
->dvs_vsel
= vsel
;
360 dev_warn(wm831x
->dev
, "Failed to set DCDC DVS VSEL: %d\n",
366 static int wm831x_buckv_set_suspend_voltage(struct regulator_dev
*rdev
,
369 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
370 struct wm831x
*wm831x
= dcdc
->wm831x
;
371 u16 reg
= dcdc
->base
+ WM831X_DCDC_SLEEP_CONTROL
;
374 vsel
= wm831x_buckv_select_min_voltage(rdev
, uV
, uV
);
378 return wm831x_set_bits(wm831x
, reg
, WM831X_DC1_SLP_VSEL_MASK
, vsel
);
381 static int wm831x_buckv_get_voltage_sel(struct regulator_dev
*rdev
)
383 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
385 if (dcdc
->dvs_gpio
&& dcdc
->dvs_gpio_state
)
386 return dcdc
->dvs_vsel
;
388 return dcdc
->on_vsel
;
391 /* Current limit options */
392 static u16 wm831x_dcdc_ilim
[] = {
393 125, 250, 375, 500, 625, 750, 875, 1000
396 static int wm831x_buckv_set_current_limit(struct regulator_dev
*rdev
,
397 int min_uA
, int max_uA
)
399 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
400 struct wm831x
*wm831x
= dcdc
->wm831x
;
401 u16 reg
= dcdc
->base
+ WM831X_DCDC_CONTROL_2
;
404 for (i
= 0; i
< ARRAY_SIZE(wm831x_dcdc_ilim
); i
++) {
405 if (max_uA
<= wm831x_dcdc_ilim
[i
])
408 if (i
== ARRAY_SIZE(wm831x_dcdc_ilim
))
411 return wm831x_set_bits(wm831x
, reg
, WM831X_DC1_HC_THR_MASK
, i
);
414 static int wm831x_buckv_get_current_limit(struct regulator_dev
*rdev
)
416 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
417 struct wm831x
*wm831x
= dcdc
->wm831x
;
418 u16 reg
= dcdc
->base
+ WM831X_DCDC_CONTROL_2
;
421 val
= wm831x_reg_read(wm831x
, reg
);
425 return wm831x_dcdc_ilim
[val
& WM831X_DC1_HC_THR_MASK
];
428 static struct regulator_ops wm831x_buckv_ops
= {
429 .set_voltage
= wm831x_buckv_set_voltage
,
430 .get_voltage_sel
= wm831x_buckv_get_voltage_sel
,
431 .list_voltage
= wm831x_buckv_list_voltage
,
432 .set_suspend_voltage
= wm831x_buckv_set_suspend_voltage
,
433 .set_current_limit
= wm831x_buckv_set_current_limit
,
434 .get_current_limit
= wm831x_buckv_get_current_limit
,
436 .is_enabled
= wm831x_dcdc_is_enabled
,
437 .enable
= wm831x_dcdc_enable
,
438 .disable
= wm831x_dcdc_disable
,
439 .get_status
= wm831x_dcdc_get_status
,
440 .get_mode
= wm831x_dcdc_get_mode
,
441 .set_mode
= wm831x_dcdc_set_mode
,
442 .set_suspend_mode
= wm831x_dcdc_set_suspend_mode
,
446 * Set up DVS control. We just log errors since we can still run
447 * (with reduced performance) if we fail.
449 static __devinit
void wm831x_buckv_dvs_init(struct wm831x_dcdc
*dcdc
,
450 struct wm831x_buckv_pdata
*pdata
)
452 struct wm831x
*wm831x
= dcdc
->wm831x
;
456 if (!pdata
|| !pdata
->dvs_gpio
)
459 switch (pdata
->dvs_control_src
) {
461 ctrl
= 2 << WM831X_DC1_DVS_SRC_SHIFT
;
464 ctrl
= 3 << WM831X_DC1_DVS_SRC_SHIFT
;
467 dev_err(wm831x
->dev
, "Invalid DVS control source %d for %s\n",
468 pdata
->dvs_control_src
, dcdc
->name
);
472 ret
= wm831x_set_bits(wm831x
, dcdc
->base
+ WM831X_DCDC_DVS_CONTROL
,
473 WM831X_DC1_DVS_SRC_MASK
, ctrl
);
475 dev_err(wm831x
->dev
, "Failed to set %s DVS source: %d\n",
480 ret
= gpio_request(pdata
->dvs_gpio
, "DCDC DVS");
482 dev_err(wm831x
->dev
, "Failed to get %s DVS GPIO: %d\n",
487 /* gpiolib won't let us read the GPIO status so pick the higher
488 * of the two existing voltages so we take it as platform data.
490 dcdc
->dvs_gpio_state
= pdata
->dvs_init_state
;
492 ret
= gpio_direction_output(pdata
->dvs_gpio
, dcdc
->dvs_gpio_state
);
494 dev_err(wm831x
->dev
, "Failed to enable %s DVS GPIO: %d\n",
496 gpio_free(pdata
->dvs_gpio
);
500 dcdc
->dvs_gpio
= pdata
->dvs_gpio
;
503 static __devinit
int wm831x_buckv_probe(struct platform_device
*pdev
)
505 struct wm831x
*wm831x
= dev_get_drvdata(pdev
->dev
.parent
);
506 struct wm831x_pdata
*pdata
= wm831x
->dev
->platform_data
;
508 struct wm831x_dcdc
*dcdc
;
509 struct resource
*res
;
512 if (pdata
&& pdata
->wm831x_num
)
513 id
= (pdata
->wm831x_num
* 10) + 1;
518 dev_dbg(&pdev
->dev
, "Probing DCDC%d\n", id
+ 1);
520 if (pdata
== NULL
|| pdata
->dcdc
[id
] == NULL
)
523 dcdc
= kzalloc(sizeof(struct wm831x_dcdc
), GFP_KERNEL
);
525 dev_err(&pdev
->dev
, "Unable to allocate private data\n");
529 dcdc
->wm831x
= wm831x
;
531 res
= platform_get_resource(pdev
, IORESOURCE_IO
, 0);
533 dev_err(&pdev
->dev
, "No I/O resource\n");
537 dcdc
->base
= res
->start
;
539 snprintf(dcdc
->name
, sizeof(dcdc
->name
), "DCDC%d", id
+ 1);
540 dcdc
->desc
.name
= dcdc
->name
;
542 dcdc
->desc
.type
= REGULATOR_VOLTAGE
;
543 dcdc
->desc
.n_voltages
= WM831X_BUCKV_MAX_SELECTOR
+ 1;
544 dcdc
->desc
.ops
= &wm831x_buckv_ops
;
545 dcdc
->desc
.owner
= THIS_MODULE
;
547 ret
= wm831x_reg_read(wm831x
, dcdc
->base
+ WM831X_DCDC_ON_CONFIG
);
549 dev_err(wm831x
->dev
, "Failed to read ON VSEL: %d\n", ret
);
552 dcdc
->on_vsel
= ret
& WM831X_DC1_ON_VSEL_MASK
;
554 ret
= wm831x_reg_read(wm831x
, dcdc
->base
+ WM831X_DCDC_DVS_CONTROL
);
556 dev_err(wm831x
->dev
, "Failed to read DVS VSEL: %d\n", ret
);
559 dcdc
->dvs_vsel
= ret
& WM831X_DC1_DVS_VSEL_MASK
;
562 wm831x_buckv_dvs_init(dcdc
, pdata
->dcdc
[id
]->driver_data
);
564 dcdc
->regulator
= regulator_register(&dcdc
->desc
, &pdev
->dev
,
565 pdata
->dcdc
[id
], dcdc
);
566 if (IS_ERR(dcdc
->regulator
)) {
567 ret
= PTR_ERR(dcdc
->regulator
);
568 dev_err(wm831x
->dev
, "Failed to register DCDC%d: %d\n",
573 irq
= platform_get_irq_byname(pdev
, "UV");
574 ret
= request_threaded_irq(irq
, NULL
, wm831x_dcdc_uv_irq
,
575 IRQF_TRIGGER_RISING
, dcdc
->name
, dcdc
);
577 dev_err(&pdev
->dev
, "Failed to request UV IRQ %d: %d\n",
582 irq
= platform_get_irq_byname(pdev
, "HC");
583 ret
= request_threaded_irq(irq
, NULL
, wm831x_dcdc_oc_irq
,
584 IRQF_TRIGGER_RISING
, dcdc
->name
, dcdc
);
586 dev_err(&pdev
->dev
, "Failed to request HC IRQ %d: %d\n",
591 platform_set_drvdata(pdev
, dcdc
);
596 free_irq(platform_get_irq_byname(pdev
, "UV"), dcdc
);
598 regulator_unregister(dcdc
->regulator
);
601 gpio_free(dcdc
->dvs_gpio
);
606 static __devexit
int wm831x_buckv_remove(struct platform_device
*pdev
)
608 struct wm831x_dcdc
*dcdc
= platform_get_drvdata(pdev
);
610 platform_set_drvdata(pdev
, NULL
);
612 free_irq(platform_get_irq_byname(pdev
, "HC"), dcdc
);
613 free_irq(platform_get_irq_byname(pdev
, "UV"), dcdc
);
614 regulator_unregister(dcdc
->regulator
);
616 gpio_free(dcdc
->dvs_gpio
);
622 static struct platform_driver wm831x_buckv_driver
= {
623 .probe
= wm831x_buckv_probe
,
624 .remove
= __devexit_p(wm831x_buckv_remove
),
626 .name
= "wm831x-buckv",
627 .owner
= THIS_MODULE
,
635 static int wm831x_buckp_list_voltage(struct regulator_dev
*rdev
,
638 if (selector
<= WM831X_BUCKP_MAX_SELECTOR
)
639 return 850000 + (selector
* 25000);
644 static int wm831x_buckp_set_voltage_int(struct regulator_dev
*rdev
, int reg
,
645 int min_uV
, int max_uV
, int *selector
)
647 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
648 struct wm831x
*wm831x
= dcdc
->wm831x
;
651 if (min_uV
<= 34000000)
652 vsel
= (min_uV
- 850000) / 25000;
656 if (wm831x_buckp_list_voltage(rdev
, vsel
) > max_uV
)
661 return wm831x_set_bits(wm831x
, reg
, WM831X_DC3_ON_VSEL_MASK
, vsel
);
664 static int wm831x_buckp_set_voltage(struct regulator_dev
*rdev
,
665 int min_uV
, int max_uV
,
668 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
669 u16 reg
= dcdc
->base
+ WM831X_DCDC_ON_CONFIG
;
671 return wm831x_buckp_set_voltage_int(rdev
, reg
, min_uV
, max_uV
,
675 static int wm831x_buckp_set_suspend_voltage(struct regulator_dev
*rdev
,
678 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
679 u16 reg
= dcdc
->base
+ WM831X_DCDC_SLEEP_CONTROL
;
682 return wm831x_buckp_set_voltage_int(rdev
, reg
, uV
, uV
, &selector
);
685 static int wm831x_buckp_get_voltage_sel(struct regulator_dev
*rdev
)
687 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
688 struct wm831x
*wm831x
= dcdc
->wm831x
;
689 u16 reg
= dcdc
->base
+ WM831X_DCDC_ON_CONFIG
;
692 val
= wm831x_reg_read(wm831x
, reg
);
696 return val
& WM831X_DC3_ON_VSEL_MASK
;
699 static struct regulator_ops wm831x_buckp_ops
= {
700 .set_voltage
= wm831x_buckp_set_voltage
,
701 .get_voltage_sel
= wm831x_buckp_get_voltage_sel
,
702 .list_voltage
= wm831x_buckp_list_voltage
,
703 .set_suspend_voltage
= wm831x_buckp_set_suspend_voltage
,
705 .is_enabled
= wm831x_dcdc_is_enabled
,
706 .enable
= wm831x_dcdc_enable
,
707 .disable
= wm831x_dcdc_disable
,
708 .get_status
= wm831x_dcdc_get_status
,
709 .get_mode
= wm831x_dcdc_get_mode
,
710 .set_mode
= wm831x_dcdc_set_mode
,
711 .set_suspend_mode
= wm831x_dcdc_set_suspend_mode
,
714 static __devinit
int wm831x_buckp_probe(struct platform_device
*pdev
)
716 struct wm831x
*wm831x
= dev_get_drvdata(pdev
->dev
.parent
);
717 struct wm831x_pdata
*pdata
= wm831x
->dev
->platform_data
;
719 struct wm831x_dcdc
*dcdc
;
720 struct resource
*res
;
723 if (pdata
&& pdata
->wm831x_num
)
724 id
= (pdata
->wm831x_num
* 10) + 1;
729 dev_dbg(&pdev
->dev
, "Probing DCDC%d\n", id
+ 1);
731 if (pdata
== NULL
|| pdata
->dcdc
[id
] == NULL
)
734 dcdc
= kzalloc(sizeof(struct wm831x_dcdc
), GFP_KERNEL
);
736 dev_err(&pdev
->dev
, "Unable to allocate private data\n");
740 dcdc
->wm831x
= wm831x
;
742 res
= platform_get_resource(pdev
, IORESOURCE_IO
, 0);
744 dev_err(&pdev
->dev
, "No I/O resource\n");
748 dcdc
->base
= res
->start
;
750 snprintf(dcdc
->name
, sizeof(dcdc
->name
), "DCDC%d", id
+ 1);
751 dcdc
->desc
.name
= dcdc
->name
;
753 dcdc
->desc
.type
= REGULATOR_VOLTAGE
;
754 dcdc
->desc
.n_voltages
= WM831X_BUCKP_MAX_SELECTOR
+ 1;
755 dcdc
->desc
.ops
= &wm831x_buckp_ops
;
756 dcdc
->desc
.owner
= THIS_MODULE
;
758 dcdc
->regulator
= regulator_register(&dcdc
->desc
, &pdev
->dev
,
759 pdata
->dcdc
[id
], dcdc
);
760 if (IS_ERR(dcdc
->regulator
)) {
761 ret
= PTR_ERR(dcdc
->regulator
);
762 dev_err(wm831x
->dev
, "Failed to register DCDC%d: %d\n",
767 irq
= platform_get_irq_byname(pdev
, "UV");
768 ret
= request_threaded_irq(irq
, NULL
, wm831x_dcdc_uv_irq
,
769 IRQF_TRIGGER_RISING
, dcdc
->name
, dcdc
);
771 dev_err(&pdev
->dev
, "Failed to request UV IRQ %d: %d\n",
776 platform_set_drvdata(pdev
, dcdc
);
781 regulator_unregister(dcdc
->regulator
);
787 static __devexit
int wm831x_buckp_remove(struct platform_device
*pdev
)
789 struct wm831x_dcdc
*dcdc
= platform_get_drvdata(pdev
);
791 platform_set_drvdata(pdev
, NULL
);
793 free_irq(platform_get_irq_byname(pdev
, "UV"), dcdc
);
794 regulator_unregister(dcdc
->regulator
);
800 static struct platform_driver wm831x_buckp_driver
= {
801 .probe
= wm831x_buckp_probe
,
802 .remove
= __devexit_p(wm831x_buckp_remove
),
804 .name
= "wm831x-buckp",
805 .owner
= THIS_MODULE
,
810 * DCDC boost convertors
813 static int wm831x_boostp_get_status(struct regulator_dev
*rdev
)
815 struct wm831x_dcdc
*dcdc
= rdev_get_drvdata(rdev
);
816 struct wm831x
*wm831x
= dcdc
->wm831x
;
819 /* First, check for errors */
820 ret
= wm831x_reg_read(wm831x
, WM831X_DCDC_UV_STATUS
);
824 if (ret
& (1 << rdev_get_id(rdev
))) {
825 dev_dbg(wm831x
->dev
, "DCDC%d under voltage\n",
826 rdev_get_id(rdev
) + 1);
827 return REGULATOR_STATUS_ERROR
;
830 /* Is the regulator on? */
831 ret
= wm831x_reg_read(wm831x
, WM831X_DCDC_STATUS
);
834 if (ret
& (1 << rdev_get_id(rdev
)))
835 return REGULATOR_STATUS_ON
;
837 return REGULATOR_STATUS_OFF
;
840 static struct regulator_ops wm831x_boostp_ops
= {
841 .get_status
= wm831x_boostp_get_status
,
843 .is_enabled
= wm831x_dcdc_is_enabled
,
844 .enable
= wm831x_dcdc_enable
,
845 .disable
= wm831x_dcdc_disable
,
848 static __devinit
int wm831x_boostp_probe(struct platform_device
*pdev
)
850 struct wm831x
*wm831x
= dev_get_drvdata(pdev
->dev
.parent
);
851 struct wm831x_pdata
*pdata
= wm831x
->dev
->platform_data
;
852 int id
= pdev
->id
% ARRAY_SIZE(pdata
->dcdc
);
853 struct wm831x_dcdc
*dcdc
;
854 struct resource
*res
;
857 dev_dbg(&pdev
->dev
, "Probing DCDC%d\n", id
+ 1);
859 if (pdata
== NULL
|| pdata
->dcdc
[id
] == NULL
)
862 dcdc
= kzalloc(sizeof(struct wm831x_dcdc
), GFP_KERNEL
);
864 dev_err(&pdev
->dev
, "Unable to allocate private data\n");
868 dcdc
->wm831x
= wm831x
;
870 res
= platform_get_resource(pdev
, IORESOURCE_IO
, 0);
872 dev_err(&pdev
->dev
, "No I/O resource\n");
876 dcdc
->base
= res
->start
;
878 snprintf(dcdc
->name
, sizeof(dcdc
->name
), "DCDC%d", id
+ 1);
879 dcdc
->desc
.name
= dcdc
->name
;
881 dcdc
->desc
.type
= REGULATOR_VOLTAGE
;
882 dcdc
->desc
.ops
= &wm831x_boostp_ops
;
883 dcdc
->desc
.owner
= THIS_MODULE
;
885 dcdc
->regulator
= regulator_register(&dcdc
->desc
, &pdev
->dev
,
886 pdata
->dcdc
[id
], dcdc
);
887 if (IS_ERR(dcdc
->regulator
)) {
888 ret
= PTR_ERR(dcdc
->regulator
);
889 dev_err(wm831x
->dev
, "Failed to register DCDC%d: %d\n",
894 irq
= platform_get_irq_byname(pdev
, "UV");
895 ret
= request_threaded_irq(irq
, NULL
, wm831x_dcdc_uv_irq
,
896 IRQF_TRIGGER_RISING
, dcdc
->name
,
899 dev_err(&pdev
->dev
, "Failed to request UV IRQ %d: %d\n",
904 platform_set_drvdata(pdev
, dcdc
);
909 regulator_unregister(dcdc
->regulator
);
915 static __devexit
int wm831x_boostp_remove(struct platform_device
*pdev
)
917 struct wm831x_dcdc
*dcdc
= platform_get_drvdata(pdev
);
919 platform_set_drvdata(pdev
, NULL
);
921 free_irq(platform_get_irq_byname(pdev
, "UV"), dcdc
);
922 regulator_unregister(dcdc
->regulator
);
928 static struct platform_driver wm831x_boostp_driver
= {
929 .probe
= wm831x_boostp_probe
,
930 .remove
= __devexit_p(wm831x_boostp_remove
),
932 .name
= "wm831x-boostp",
933 .owner
= THIS_MODULE
,
938 * External Power Enable
940 * These aren't actually DCDCs but look like them in hardware so share
944 #define WM831X_EPE_BASE 6
946 static struct regulator_ops wm831x_epe_ops
= {
947 .is_enabled
= wm831x_dcdc_is_enabled
,
948 .enable
= wm831x_dcdc_enable
,
949 .disable
= wm831x_dcdc_disable
,
950 .get_status
= wm831x_dcdc_get_status
,
953 static __devinit
int wm831x_epe_probe(struct platform_device
*pdev
)
955 struct wm831x
*wm831x
= dev_get_drvdata(pdev
->dev
.parent
);
956 struct wm831x_pdata
*pdata
= wm831x
->dev
->platform_data
;
957 int id
= pdev
->id
% ARRAY_SIZE(pdata
->epe
);
958 struct wm831x_dcdc
*dcdc
;
961 dev_dbg(&pdev
->dev
, "Probing EPE%d\n", id
+ 1);
963 if (pdata
== NULL
|| pdata
->epe
[id
] == NULL
)
966 dcdc
= kzalloc(sizeof(struct wm831x_dcdc
), GFP_KERNEL
);
968 dev_err(&pdev
->dev
, "Unable to allocate private data\n");
972 dcdc
->wm831x
= wm831x
;
974 /* For current parts this is correct; probably need to revisit
977 snprintf(dcdc
->name
, sizeof(dcdc
->name
), "EPE%d", id
+ 1);
978 dcdc
->desc
.name
= dcdc
->name
;
979 dcdc
->desc
.id
= id
+ WM831X_EPE_BASE
; /* Offset in DCDC registers */
980 dcdc
->desc
.ops
= &wm831x_epe_ops
;
981 dcdc
->desc
.type
= REGULATOR_VOLTAGE
;
982 dcdc
->desc
.owner
= THIS_MODULE
;
984 dcdc
->regulator
= regulator_register(&dcdc
->desc
, &pdev
->dev
,
985 pdata
->epe
[id
], dcdc
);
986 if (IS_ERR(dcdc
->regulator
)) {
987 ret
= PTR_ERR(dcdc
->regulator
);
988 dev_err(wm831x
->dev
, "Failed to register EPE%d: %d\n",
993 platform_set_drvdata(pdev
, dcdc
);
1002 static __devexit
int wm831x_epe_remove(struct platform_device
*pdev
)
1004 struct wm831x_dcdc
*dcdc
= platform_get_drvdata(pdev
);
1006 platform_set_drvdata(pdev
, NULL
);
1008 regulator_unregister(dcdc
->regulator
);
1014 static struct platform_driver wm831x_epe_driver
= {
1015 .probe
= wm831x_epe_probe
,
1016 .remove
= __devexit_p(wm831x_epe_remove
),
1018 .name
= "wm831x-epe",
1019 .owner
= THIS_MODULE
,
1023 static int __init
wm831x_dcdc_init(void)
1026 ret
= platform_driver_register(&wm831x_buckv_driver
);
1028 pr_err("Failed to register WM831x BUCKV driver: %d\n", ret
);
1030 ret
= platform_driver_register(&wm831x_buckp_driver
);
1032 pr_err("Failed to register WM831x BUCKP driver: %d\n", ret
);
1034 ret
= platform_driver_register(&wm831x_boostp_driver
);
1036 pr_err("Failed to register WM831x BOOST driver: %d\n", ret
);
1038 ret
= platform_driver_register(&wm831x_epe_driver
);
1040 pr_err("Failed to register WM831x EPE driver: %d\n", ret
);
1044 subsys_initcall(wm831x_dcdc_init
);
1046 static void __exit
wm831x_dcdc_exit(void)
1048 platform_driver_unregister(&wm831x_epe_driver
);
1049 platform_driver_unregister(&wm831x_boostp_driver
);
1050 platform_driver_unregister(&wm831x_buckp_driver
);
1051 platform_driver_unregister(&wm831x_buckv_driver
);
1053 module_exit(wm831x_dcdc_exit
);
1055 /* Module information */
1056 MODULE_AUTHOR("Mark Brown");
1057 MODULE_DESCRIPTION("WM831x DC-DC convertor driver");
1058 MODULE_LICENSE("GPL");
1059 MODULE_ALIAS("platform:wm831x-buckv");
1060 MODULE_ALIAS("platform:wm831x-buckp");
1061 MODULE_ALIAS("platform:wm831x-epe");