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 const struct regulator_linear_range wm831x_buckv_ranges[] = {
209 REGULATOR_LINEAR_RANGE(600000, 0, 0x7, 0),
210 REGULATOR_LINEAR_RANGE(600000, 0x8, 0x68, 12500),
213 static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state)
215 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
217 if (state == dcdc->dvs_gpio_state)
220 dcdc->dvs_gpio_state = state;
221 gpio_set_value(dcdc->dvs_gpio, state);
223 /* Should wait for DVS state change to be asserted if we have
224 * a GPIO for it, for now assume the device is configured
225 * for the fastest possible transition.
231 static int wm831x_buckv_set_voltage_sel(struct regulator_dev *rdev,
234 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
235 struct wm831x *wm831x = dcdc->wm831x;
236 int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
237 int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL;
240 /* If this value is already set then do a GPIO update if we can */
241 if (dcdc->dvs_gpio && dcdc->on_vsel == vsel)
242 return wm831x_buckv_set_dvs(rdev, 0);
244 if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel)
245 return wm831x_buckv_set_dvs(rdev, 1);
247 /* Always set the ON status to the minimum voltage */
248 ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel);
251 dcdc->on_vsel = vsel;
256 /* Kick the voltage transition now */
257 ret = wm831x_buckv_set_dvs(rdev, 0);
262 * If this VSEL is higher than the last one we've seen then
263 * remember it as the DVS VSEL. This is optimised for CPUfreq
264 * usage where we want to get to the highest voltage very
267 if (vsel > dcdc->dvs_vsel) {
268 ret = wm831x_set_bits(wm831x, dvs_reg,
269 WM831X_DC1_DVS_VSEL_MASK,
272 dcdc->dvs_vsel = vsel;
274 dev_warn(wm831x->dev,
275 "Failed to set DCDC DVS VSEL: %d\n", ret);
281 static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev,
284 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
285 struct wm831x *wm831x = dcdc->wm831x;
286 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
289 vsel = regulator_map_voltage_linear_range(rdev, uV, uV);
293 return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel);
296 static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev)
298 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
300 if (dcdc->dvs_gpio && dcdc->dvs_gpio_state)
301 return dcdc->dvs_vsel;
303 return dcdc->on_vsel;
306 /* Current limit options */
307 static u16 wm831x_dcdc_ilim[] = {
308 125, 250, 375, 500, 625, 750, 875, 1000
311 static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev,
312 int min_uA, int max_uA)
314 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
315 struct wm831x *wm831x = dcdc->wm831x;
316 u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2;
319 for (i = ARRAY_SIZE(wm831x_dcdc_ilim) - 1; i >= 0; i--) {
320 if ((min_uA <= wm831x_dcdc_ilim[i]) &&
321 (wm831x_dcdc_ilim[i] <= max_uA))
322 return wm831x_set_bits(wm831x, reg,
323 WM831X_DC1_HC_THR_MASK,
324 i << WM831X_DC1_HC_THR_SHIFT);
330 static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev)
332 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
333 struct wm831x *wm831x = dcdc->wm831x;
334 u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2;
337 val = wm831x_reg_read(wm831x, reg);
341 val = (val & WM831X_DC1_HC_THR_MASK) >> WM831X_DC1_HC_THR_SHIFT;
342 return wm831x_dcdc_ilim[val];
345 static const struct regulator_ops wm831x_buckv_ops = {
346 .set_voltage_sel = wm831x_buckv_set_voltage_sel,
347 .get_voltage_sel = wm831x_buckv_get_voltage_sel,
348 .list_voltage = regulator_list_voltage_linear_range,
349 .map_voltage = regulator_map_voltage_linear_range,
350 .set_suspend_voltage = wm831x_buckv_set_suspend_voltage,
351 .set_current_limit = wm831x_buckv_set_current_limit,
352 .get_current_limit = wm831x_buckv_get_current_limit,
354 .is_enabled = regulator_is_enabled_regmap,
355 .enable = regulator_enable_regmap,
356 .disable = regulator_disable_regmap,
357 .get_status = wm831x_dcdc_get_status,
358 .get_mode = wm831x_dcdc_get_mode,
359 .set_mode = wm831x_dcdc_set_mode,
360 .set_suspend_mode = wm831x_dcdc_set_suspend_mode,
364 * Set up DVS control. We just log errors since we can still run
365 * (with reduced performance) if we fail.
367 static void wm831x_buckv_dvs_init(struct platform_device *pdev,
368 struct wm831x_dcdc *dcdc,
369 struct wm831x_buckv_pdata *pdata)
371 struct wm831x *wm831x = dcdc->wm831x;
375 if (!pdata || !pdata->dvs_gpio)
378 /* gpiolib won't let us read the GPIO status so pick the higher
379 * of the two existing voltages so we take it as platform data.
381 dcdc->dvs_gpio_state = pdata->dvs_init_state;
383 ret = devm_gpio_request_one(&pdev->dev, pdata->dvs_gpio,
384 dcdc->dvs_gpio_state ? GPIOF_INIT_HIGH : 0,
387 dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n",
392 dcdc->dvs_gpio = pdata->dvs_gpio;
394 switch (pdata->dvs_control_src) {
396 ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT;
399 ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT;
402 dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n",
403 pdata->dvs_control_src, dcdc->name);
407 /* If DVS_VSEL is set to the minimum value then raise it to ON_VSEL
408 * to make bootstrapping a bit smoother.
410 if (!dcdc->dvs_vsel) {
411 ret = wm831x_set_bits(wm831x,
412 dcdc->base + WM831X_DCDC_DVS_CONTROL,
413 WM831X_DC1_DVS_VSEL_MASK, dcdc->on_vsel);
415 dcdc->dvs_vsel = dcdc->on_vsel;
417 dev_warn(wm831x->dev, "Failed to set DVS_VSEL: %d\n",
421 ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL,
422 WM831X_DC1_DVS_SRC_MASK, ctrl);
424 dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n",
429 static int wm831x_buckv_probe(struct platform_device *pdev)
431 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
432 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
433 struct regulator_config config = { };
435 struct wm831x_dcdc *dcdc;
436 struct resource *res;
439 if (pdata && pdata->wm831x_num)
440 id = (pdata->wm831x_num * 10) + 1;
445 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
447 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc),
452 dcdc->wm831x = wm831x;
454 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
456 dev_err(&pdev->dev, "No REG resource\n");
460 dcdc->base = res->start;
462 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
463 dcdc->desc.name = dcdc->name;
465 snprintf(dcdc->supply_name, sizeof(dcdc->supply_name),
467 dcdc->desc.supply_name = dcdc->supply_name;
470 dcdc->desc.type = REGULATOR_VOLTAGE;
471 dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1;
472 dcdc->desc.linear_ranges = wm831x_buckv_ranges;
473 dcdc->desc.n_linear_ranges = ARRAY_SIZE(wm831x_buckv_ranges);
474 dcdc->desc.ops = &wm831x_buckv_ops;
475 dcdc->desc.owner = THIS_MODULE;
476 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
477 dcdc->desc.enable_mask = 1 << id;
479 ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG);
481 dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret);
484 dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK;
486 ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL);
488 dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret);
491 dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK;
493 if (pdata && pdata->dcdc[id])
494 wm831x_buckv_dvs_init(pdev, dcdc,
495 pdata->dcdc[id]->driver_data);
497 config.dev = pdev->dev.parent;
499 config.init_data = pdata->dcdc[id];
500 config.driver_data = dcdc;
501 config.regmap = wm831x->regmap;
503 dcdc->regulator = devm_regulator_register(&pdev->dev, &dcdc->desc,
505 if (IS_ERR(dcdc->regulator)) {
506 ret = PTR_ERR(dcdc->regulator);
507 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
512 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
513 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
515 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
518 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
523 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC"));
524 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
526 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
529 dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n",
534 platform_set_drvdata(pdev, dcdc);
542 static struct platform_driver wm831x_buckv_driver = {
543 .probe = wm831x_buckv_probe,
545 .name = "wm831x-buckv",
553 static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, int uV)
555 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
556 struct wm831x *wm831x = dcdc->wm831x;
557 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
560 sel = regulator_map_voltage_linear(rdev, uV, uV);
564 return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, sel);
567 static const struct regulator_ops wm831x_buckp_ops = {
568 .set_voltage_sel = regulator_set_voltage_sel_regmap,
569 .get_voltage_sel = regulator_get_voltage_sel_regmap,
570 .list_voltage = regulator_list_voltage_linear,
571 .map_voltage = regulator_map_voltage_linear,
572 .set_suspend_voltage = wm831x_buckp_set_suspend_voltage,
574 .is_enabled = regulator_is_enabled_regmap,
575 .enable = regulator_enable_regmap,
576 .disable = regulator_disable_regmap,
577 .get_status = wm831x_dcdc_get_status,
578 .get_mode = wm831x_dcdc_get_mode,
579 .set_mode = wm831x_dcdc_set_mode,
580 .set_suspend_mode = wm831x_dcdc_set_suspend_mode,
583 static int wm831x_buckp_probe(struct platform_device *pdev)
585 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
586 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
587 struct regulator_config config = { };
589 struct wm831x_dcdc *dcdc;
590 struct resource *res;
593 if (pdata && pdata->wm831x_num)
594 id = (pdata->wm831x_num * 10) + 1;
599 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
601 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc),
606 dcdc->wm831x = wm831x;
608 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
610 dev_err(&pdev->dev, "No REG resource\n");
614 dcdc->base = res->start;
616 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
617 dcdc->desc.name = dcdc->name;
619 snprintf(dcdc->supply_name, sizeof(dcdc->supply_name),
621 dcdc->desc.supply_name = dcdc->supply_name;
624 dcdc->desc.type = REGULATOR_VOLTAGE;
625 dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1;
626 dcdc->desc.ops = &wm831x_buckp_ops;
627 dcdc->desc.owner = THIS_MODULE;
628 dcdc->desc.vsel_reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
629 dcdc->desc.vsel_mask = WM831X_DC3_ON_VSEL_MASK;
630 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
631 dcdc->desc.enable_mask = 1 << id;
632 dcdc->desc.min_uV = 850000;
633 dcdc->desc.uV_step = 25000;
635 config.dev = pdev->dev.parent;
637 config.init_data = pdata->dcdc[id];
638 config.driver_data = dcdc;
639 config.regmap = wm831x->regmap;
641 dcdc->regulator = devm_regulator_register(&pdev->dev, &dcdc->desc,
643 if (IS_ERR(dcdc->regulator)) {
644 ret = PTR_ERR(dcdc->regulator);
645 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
650 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
651 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
653 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
656 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
661 platform_set_drvdata(pdev, dcdc);
669 static struct platform_driver wm831x_buckp_driver = {
670 .probe = wm831x_buckp_probe,
672 .name = "wm831x-buckp",
677 * DCDC boost convertors
680 static int wm831x_boostp_get_status(struct regulator_dev *rdev)
682 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
683 struct wm831x *wm831x = dcdc->wm831x;
686 /* First, check for errors */
687 ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS);
691 if (ret & (1 << rdev_get_id(rdev))) {
692 dev_dbg(wm831x->dev, "DCDC%d under voltage\n",
693 rdev_get_id(rdev) + 1);
694 return REGULATOR_STATUS_ERROR;
697 /* Is the regulator on? */
698 ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS);
701 if (ret & (1 << rdev_get_id(rdev)))
702 return REGULATOR_STATUS_ON;
704 return REGULATOR_STATUS_OFF;
707 static const struct regulator_ops wm831x_boostp_ops = {
708 .get_status = wm831x_boostp_get_status,
710 .is_enabled = regulator_is_enabled_regmap,
711 .enable = regulator_enable_regmap,
712 .disable = regulator_disable_regmap,
715 static int wm831x_boostp_probe(struct platform_device *pdev)
717 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
718 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
719 struct regulator_config config = { };
720 int id = pdev->id % ARRAY_SIZE(pdata->dcdc);
721 struct wm831x_dcdc *dcdc;
722 struct resource *res;
725 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
727 if (pdata == NULL || pdata->dcdc[id] == NULL)
730 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL);
734 dcdc->wm831x = wm831x;
736 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
738 dev_err(&pdev->dev, "No REG resource\n");
741 dcdc->base = res->start;
743 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
744 dcdc->desc.name = dcdc->name;
746 dcdc->desc.type = REGULATOR_VOLTAGE;
747 dcdc->desc.ops = &wm831x_boostp_ops;
748 dcdc->desc.owner = THIS_MODULE;
749 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
750 dcdc->desc.enable_mask = 1 << id;
752 config.dev = pdev->dev.parent;
754 config.init_data = pdata->dcdc[id];
755 config.driver_data = dcdc;
756 config.regmap = wm831x->regmap;
758 dcdc->regulator = devm_regulator_register(&pdev->dev, &dcdc->desc,
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 = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
768 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
770 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
774 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
779 platform_set_drvdata(pdev, dcdc);
784 static struct platform_driver wm831x_boostp_driver = {
785 .probe = wm831x_boostp_probe,
787 .name = "wm831x-boostp",
792 * External Power Enable
794 * These aren't actually DCDCs but look like them in hardware so share
798 #define WM831X_EPE_BASE 6
800 static const struct regulator_ops wm831x_epe_ops = {
801 .is_enabled = regulator_is_enabled_regmap,
802 .enable = regulator_enable_regmap,
803 .disable = regulator_disable_regmap,
804 .get_status = wm831x_dcdc_get_status,
807 static int wm831x_epe_probe(struct platform_device *pdev)
809 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
810 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
811 struct regulator_config config = { };
812 int id = pdev->id % ARRAY_SIZE(pdata->epe);
813 struct wm831x_dcdc *dcdc;
816 dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1);
818 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL);
822 dcdc->wm831x = wm831x;
824 /* For current parts this is correct; probably need to revisit
827 snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1);
828 dcdc->desc.name = dcdc->name;
829 dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */
830 dcdc->desc.ops = &wm831x_epe_ops;
831 dcdc->desc.type = REGULATOR_VOLTAGE;
832 dcdc->desc.owner = THIS_MODULE;
833 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
834 dcdc->desc.enable_mask = 1 << dcdc->desc.id;
836 config.dev = pdev->dev.parent;
838 config.init_data = pdata->epe[id];
839 config.driver_data = dcdc;
840 config.regmap = wm831x->regmap;
842 dcdc->regulator = devm_regulator_register(&pdev->dev, &dcdc->desc,
844 if (IS_ERR(dcdc->regulator)) {
845 ret = PTR_ERR(dcdc->regulator);
846 dev_err(wm831x->dev, "Failed to register EPE%d: %d\n",
851 platform_set_drvdata(pdev, dcdc);
859 static struct platform_driver wm831x_epe_driver = {
860 .probe = wm831x_epe_probe,
862 .name = "wm831x-epe",
866 static struct platform_driver * const drivers[] = {
867 &wm831x_buckv_driver,
868 &wm831x_buckp_driver,
869 &wm831x_boostp_driver,
873 static int __init wm831x_dcdc_init(void)
875 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
877 subsys_initcall(wm831x_dcdc_init);
879 static void __exit wm831x_dcdc_exit(void)
881 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
883 module_exit(wm831x_dcdc_exit);
885 /* Module information */
886 MODULE_AUTHOR("Mark Brown");
887 MODULE_DESCRIPTION("WM831x DC-DC convertor driver");
888 MODULE_LICENSE("GPL");
889 MODULE_ALIAS("platform:wm831x-buckv");
890 MODULE_ALIAS("platform:wm831x-buckp");
891 MODULE_ALIAS("platform:wm831x-boostp");
892 MODULE_ALIAS("platform:wm831x-epe");