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");