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 = wm831x_irq(wm831x, 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 = wm831x_irq(wm831x, 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(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")),
564 regulator_unregister(dcdc->regulator);
567 gpio_free(dcdc->dvs_gpio);
571 static __devexit int wm831x_buckv_remove(struct platform_device *pdev)
573 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
574 struct wm831x *wm831x = dcdc->wm831x;
576 platform_set_drvdata(pdev, NULL);
578 free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC")),
580 free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")),
582 regulator_unregister(dcdc->regulator);
584 gpio_free(dcdc->dvs_gpio);
589 static struct platform_driver wm831x_buckv_driver = {
590 .probe = wm831x_buckv_probe,
591 .remove = __devexit_p(wm831x_buckv_remove),
593 .name = "wm831x-buckv",
594 .owner = THIS_MODULE,
602 static int wm831x_buckp_list_voltage(struct regulator_dev *rdev,
605 if (selector <= WM831X_BUCKP_MAX_SELECTOR)
606 return 850000 + (selector * 25000);
611 static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg,
612 int min_uV, int max_uV, int *selector)
614 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
615 struct wm831x *wm831x = dcdc->wm831x;
618 if (min_uV <= 34000000)
619 vsel = (min_uV - 850000) / 25000;
623 if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV)
628 return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel);
631 static int wm831x_buckp_set_voltage(struct regulator_dev *rdev,
632 int min_uV, int max_uV,
635 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
636 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
638 return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV,
642 static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev,
645 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
646 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
649 return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV, &selector);
652 static struct regulator_ops wm831x_buckp_ops = {
653 .set_voltage = wm831x_buckp_set_voltage,
654 .get_voltage_sel = regulator_get_voltage_sel_regmap,
655 .list_voltage = wm831x_buckp_list_voltage,
656 .set_suspend_voltage = wm831x_buckp_set_suspend_voltage,
658 .is_enabled = regulator_is_enabled_regmap,
659 .enable = regulator_enable_regmap,
660 .disable = regulator_disable_regmap,
661 .get_status = wm831x_dcdc_get_status,
662 .get_mode = wm831x_dcdc_get_mode,
663 .set_mode = wm831x_dcdc_set_mode,
664 .set_suspend_mode = wm831x_dcdc_set_suspend_mode,
667 static __devinit int wm831x_buckp_probe(struct platform_device *pdev)
669 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
670 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
671 struct regulator_config config = { };
673 struct wm831x_dcdc *dcdc;
674 struct resource *res;
677 if (pdata && pdata->wm831x_num)
678 id = (pdata->wm831x_num * 10) + 1;
683 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
685 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc),
688 dev_err(&pdev->dev, "Unable to allocate private data\n");
692 dcdc->wm831x = wm831x;
694 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
696 dev_err(&pdev->dev, "No I/O resource\n");
700 dcdc->base = res->start;
702 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
703 dcdc->desc.name = dcdc->name;
705 snprintf(dcdc->supply_name, sizeof(dcdc->supply_name),
707 dcdc->desc.supply_name = dcdc->supply_name;
710 dcdc->desc.type = REGULATOR_VOLTAGE;
711 dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1;
712 dcdc->desc.ops = &wm831x_buckp_ops;
713 dcdc->desc.owner = THIS_MODULE;
714 dcdc->desc.vsel_reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
715 dcdc->desc.vsel_mask = WM831X_DC3_ON_VSEL_MASK;
716 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
717 dcdc->desc.enable_mask = 1 << id;
719 config.dev = pdev->dev.parent;
721 config.init_data = pdata->dcdc[id];
722 config.driver_data = dcdc;
723 config.regmap = wm831x->regmap;
725 dcdc->regulator = regulator_register(&dcdc->desc, &config);
726 if (IS_ERR(dcdc->regulator)) {
727 ret = PTR_ERR(dcdc->regulator);
728 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
733 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
734 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
735 IRQF_TRIGGER_RISING, dcdc->name, dcdc);
737 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
742 platform_set_drvdata(pdev, dcdc);
747 regulator_unregister(dcdc->regulator);
752 static __devexit int wm831x_buckp_remove(struct platform_device *pdev)
754 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
756 platform_set_drvdata(pdev, NULL);
758 free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")),
760 regulator_unregister(dcdc->regulator);
765 static struct platform_driver wm831x_buckp_driver = {
766 .probe = wm831x_buckp_probe,
767 .remove = __devexit_p(wm831x_buckp_remove),
769 .name = "wm831x-buckp",
770 .owner = THIS_MODULE,
775 * DCDC boost convertors
778 static int wm831x_boostp_get_status(struct regulator_dev *rdev)
780 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
781 struct wm831x *wm831x = dcdc->wm831x;
784 /* First, check for errors */
785 ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS);
789 if (ret & (1 << rdev_get_id(rdev))) {
790 dev_dbg(wm831x->dev, "DCDC%d under voltage\n",
791 rdev_get_id(rdev) + 1);
792 return REGULATOR_STATUS_ERROR;
795 /* Is the regulator on? */
796 ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS);
799 if (ret & (1 << rdev_get_id(rdev)))
800 return REGULATOR_STATUS_ON;
802 return REGULATOR_STATUS_OFF;
805 static struct regulator_ops wm831x_boostp_ops = {
806 .get_status = wm831x_boostp_get_status,
808 .is_enabled = regulator_is_enabled_regmap,
809 .enable = regulator_enable_regmap,
810 .disable = regulator_disable_regmap,
813 static __devinit int wm831x_boostp_probe(struct platform_device *pdev)
815 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
816 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
817 struct regulator_config config = { };
818 int id = pdev->id % ARRAY_SIZE(pdata->dcdc);
819 struct wm831x_dcdc *dcdc;
820 struct resource *res;
823 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
825 if (pdata == NULL || pdata->dcdc[id] == NULL)
828 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL);
830 dev_err(&pdev->dev, "Unable to allocate private data\n");
834 dcdc->wm831x = wm831x;
836 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
838 dev_err(&pdev->dev, "No I/O resource\n");
842 dcdc->base = res->start;
844 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
845 dcdc->desc.name = dcdc->name;
847 dcdc->desc.type = REGULATOR_VOLTAGE;
848 dcdc->desc.ops = &wm831x_boostp_ops;
849 dcdc->desc.owner = THIS_MODULE;
850 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
851 dcdc->desc.enable_mask = 1 << id;
853 config.dev = pdev->dev.parent;
855 config.init_data = pdata->dcdc[id];
856 config.driver_data = dcdc;
857 config.regmap = wm831x->regmap;
859 dcdc->regulator = regulator_register(&dcdc->desc, &config);
860 if (IS_ERR(dcdc->regulator)) {
861 ret = PTR_ERR(dcdc->regulator);
862 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
867 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
868 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
869 IRQF_TRIGGER_RISING, dcdc->name,
872 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
877 platform_set_drvdata(pdev, dcdc);
882 regulator_unregister(dcdc->regulator);
887 static __devexit int wm831x_boostp_remove(struct platform_device *pdev)
889 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
891 platform_set_drvdata(pdev, NULL);
893 free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")),
895 regulator_unregister(dcdc->regulator);
900 static struct platform_driver wm831x_boostp_driver = {
901 .probe = wm831x_boostp_probe,
902 .remove = __devexit_p(wm831x_boostp_remove),
904 .name = "wm831x-boostp",
905 .owner = THIS_MODULE,
910 * External Power Enable
912 * These aren't actually DCDCs but look like them in hardware so share
916 #define WM831X_EPE_BASE 6
918 static struct regulator_ops wm831x_epe_ops = {
919 .is_enabled = regulator_is_enabled_regmap,
920 .enable = regulator_enable_regmap,
921 .disable = regulator_disable_regmap,
922 .get_status = wm831x_dcdc_get_status,
925 static __devinit int wm831x_epe_probe(struct platform_device *pdev)
927 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
928 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
929 struct regulator_config config = { };
930 int id = pdev->id % ARRAY_SIZE(pdata->epe);
931 struct wm831x_dcdc *dcdc;
934 dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1);
936 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL);
938 dev_err(&pdev->dev, "Unable to allocate private data\n");
942 dcdc->wm831x = wm831x;
944 /* For current parts this is correct; probably need to revisit
947 snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1);
948 dcdc->desc.name = dcdc->name;
949 dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */
950 dcdc->desc.ops = &wm831x_epe_ops;
951 dcdc->desc.type = REGULATOR_VOLTAGE;
952 dcdc->desc.owner = THIS_MODULE;
953 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
954 dcdc->desc.enable_mask = 1 << dcdc->desc.id;
956 config.dev = pdev->dev.parent;
958 config.init_data = pdata->epe[id];
959 config.driver_data = dcdc;
960 config.regmap = wm831x->regmap;
962 dcdc->regulator = regulator_register(&dcdc->desc, &config);
963 if (IS_ERR(dcdc->regulator)) {
964 ret = PTR_ERR(dcdc->regulator);
965 dev_err(wm831x->dev, "Failed to register EPE%d: %d\n",
970 platform_set_drvdata(pdev, dcdc);
978 static __devexit int wm831x_epe_remove(struct platform_device *pdev)
980 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
982 platform_set_drvdata(pdev, NULL);
983 regulator_unregister(dcdc->regulator);
988 static struct platform_driver wm831x_epe_driver = {
989 .probe = wm831x_epe_probe,
990 .remove = __devexit_p(wm831x_epe_remove),
992 .name = "wm831x-epe",
993 .owner = THIS_MODULE,
997 static int __init wm831x_dcdc_init(void)
1000 ret = platform_driver_register(&wm831x_buckv_driver);
1002 pr_err("Failed to register WM831x BUCKV driver: %d\n", ret);
1004 ret = platform_driver_register(&wm831x_buckp_driver);
1006 pr_err("Failed to register WM831x BUCKP driver: %d\n", ret);
1008 ret = platform_driver_register(&wm831x_boostp_driver);
1010 pr_err("Failed to register WM831x BOOST driver: %d\n", ret);
1012 ret = platform_driver_register(&wm831x_epe_driver);
1014 pr_err("Failed to register WM831x EPE driver: %d\n", ret);
1018 subsys_initcall(wm831x_dcdc_init);
1020 static void __exit wm831x_dcdc_exit(void)
1022 platform_driver_unregister(&wm831x_epe_driver);
1023 platform_driver_unregister(&wm831x_boostp_driver);
1024 platform_driver_unregister(&wm831x_buckp_driver);
1025 platform_driver_unregister(&wm831x_buckv_driver);
1027 module_exit(wm831x_dcdc_exit);
1029 /* Module information */
1030 MODULE_AUTHOR("Mark Brown");
1031 MODULE_DESCRIPTION("WM831x DC-DC convertor driver");
1032 MODULE_LICENSE("GPL");
1033 MODULE_ALIAS("platform:wm831x-buckv");
1034 MODULE_ALIAS("platform:wm831x-buckp");
1035 MODULE_ALIAS("platform:wm831x-epe");