phy-mapphone-mdm6600.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Motorola Mapphone MDM6600 modem GPIO controlled USB PHY driver
  4 * Copyright (C) 2018 Tony Lindgren <tony@atomide.com>
  5 */
  6
  7#include <linux/delay.h>
  8#include <linux/err.h>
  9#include <linux/io.h>
 10#include <linux/interrupt.h>
 11#include <linux/module.h>
 12#include <linux/of.h>
 13#include <linux/platform_device.h>
 14#include <linux/slab.h>
 15
 16#include <linux/gpio/consumer.h>
 17#include <linux/of_platform.h>
 18#include <linux/phy/phy.h>
 19#include <linux/pinctrl/consumer.h>
 20
 21#define PHY_MDM6600_PHY_DELAY_MS	4000	/* PHY enable 2.2s to 3.5s */
 22#define PHY_MDM6600_ENABLED_DELAY_MS	8000	/* 8s more total for MDM6600 */
 23#define PHY_MDM6600_WAKE_KICK_MS	600	/* time on after GPIO toggle */
 24#define MDM6600_MODEM_IDLE_DELAY_MS	1000	/* modem after USB suspend */
 25#define MDM6600_MODEM_WAKE_DELAY_MS	200	/* modem response after idle */
 26
 27enum phy_mdm6600_ctrl_lines {
 28	PHY_MDM6600_ENABLE,			/* USB PHY enable */
 29	PHY_MDM6600_POWER,			/* Device power */
 30	PHY_MDM6600_RESET,			/* Device reset */
 31	PHY_MDM6600_NR_CTRL_LINES,
 32};
 33
 34enum phy_mdm6600_bootmode_lines {
 35	PHY_MDM6600_MODE0,			/* out USB mode0 and OOB wake */
 36	PHY_MDM6600_MODE1,			/* out USB mode1, in OOB wake */
 37	PHY_MDM6600_NR_MODE_LINES,
 38};
 39
 40enum phy_mdm6600_cmd_lines {
 41	PHY_MDM6600_CMD0,
 42	PHY_MDM6600_CMD1,
 43	PHY_MDM6600_CMD2,
 44	PHY_MDM6600_NR_CMD_LINES,
 45};
 46
 47enum phy_mdm6600_status_lines {
 48	PHY_MDM6600_STATUS0,
 49	PHY_MDM6600_STATUS1,
 50	PHY_MDM6600_STATUS2,
 51	PHY_MDM6600_NR_STATUS_LINES,
 52};
 53
 54/*
 55 * MDM6600 command codes. These are based on Motorola Mapphone Linux
 56 * kernel tree.
 57 */
 58enum phy_mdm6600_cmd {
 59	PHY_MDM6600_CMD_BP_PANIC_ACK,
 60	PHY_MDM6600_CMD_DATA_ONLY_BYPASS,	/* Reroute USB to CPCAP PHY */
 61	PHY_MDM6600_CMD_FULL_BYPASS,		/* Reroute USB to CPCAP PHY */
 62	PHY_MDM6600_CMD_NO_BYPASS,		/* Request normal USB mode */
 63	PHY_MDM6600_CMD_BP_SHUTDOWN_REQ,	/* Request device power off */
 64	PHY_MDM6600_CMD_BP_UNKNOWN_5,
 65	PHY_MDM6600_CMD_BP_UNKNOWN_6,
 66	PHY_MDM6600_CMD_UNDEFINED,
 67};
 68
 69/*
 70 * MDM6600 status codes. These are based on Motorola Mapphone Linux
 71 * kernel tree.
 72 */
 73enum phy_mdm6600_status {
 74	PHY_MDM6600_STATUS_PANIC,		/* Seems to be really off */
 75	PHY_MDM6600_STATUS_PANIC_BUSY_WAIT,
 76	PHY_MDM6600_STATUS_QC_DLOAD,
 77	PHY_MDM6600_STATUS_RAM_DOWNLOADER,	/* MDM6600 USB flashing mode */
 78	PHY_MDM6600_STATUS_PHONE_CODE_AWAKE,	/* MDM6600 normal USB mode */
 79	PHY_MDM6600_STATUS_PHONE_CODE_ASLEEP,
 80	PHY_MDM6600_STATUS_SHUTDOWN_ACK,
 81	PHY_MDM6600_STATUS_UNDEFINED,
 82};
 83
 84static const char * const
 85phy_mdm6600_status_name[] = {
 86	"off", "busy", "qc_dl", "ram_dl", "awake",
 87	"asleep", "shutdown", "undefined",
 88};
 89
 90struct phy_mdm6600 {
 91	struct device *dev;
 92	struct phy *generic_phy;
 93	struct phy_provider *phy_provider;
 94	struct gpio_desc *ctrl_gpios[PHY_MDM6600_NR_CTRL_LINES];
 95	struct gpio_descs *mode_gpios;
 96	struct gpio_descs *status_gpios;
 97	struct gpio_descs *cmd_gpios;
 98	struct delayed_work bootup_work;
 99	struct delayed_work status_work;
100	struct delayed_work modem_wake_work;
101	struct completion ack;
102	bool enabled;				/* mdm6600 phy enabled */
103	bool running;				/* mdm6600 boot done */
104	bool awake;				/* mdm6600 respnds on n_gsm */
105	int status;
106};
107
108static int phy_mdm6600_init(struct phy *x)
109{
110	struct phy_mdm6600 *ddata = phy_get_drvdata(x);
111	struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE];
112
113	if (!ddata->enabled)
114		return -EPROBE_DEFER;
115
116	gpiod_set_value_cansleep(enable_gpio, 0);
117
118	return 0;
119}
120
121static int phy_mdm6600_power_on(struct phy *x)
122{
123	struct phy_mdm6600 *ddata = phy_get_drvdata(x);
124	struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE];
125
126	if (!ddata->enabled)
127		return -ENODEV;
128
129	gpiod_set_value_cansleep(enable_gpio, 1);
130
131	/* Allow aggressive PM for USB, it's only needed for n_gsm port */
132	if (pm_runtime_enabled(&x->dev))
133		phy_pm_runtime_put(x);
134
135	return 0;
136}
137
138static int phy_mdm6600_power_off(struct phy *x)
139{
140	struct phy_mdm6600 *ddata = phy_get_drvdata(x);
141	struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE];
142	int error;
143
144	if (!ddata->enabled)
145		return -ENODEV;
146
147	/* Paired with phy_pm_runtime_put() in phy_mdm6600_power_on() */
148	if (pm_runtime_enabled(&x->dev)) {
149		error = phy_pm_runtime_get(x);
150		if (error < 0 && error != -EINPROGRESS)
151			dev_warn(ddata->dev, "%s: phy_pm_runtime_get: %i\n",
152				 __func__, error);
153	}
154
155	gpiod_set_value_cansleep(enable_gpio, 0);
156
157	return 0;
158}
159
160static const struct phy_ops gpio_usb_ops = {
161	.init = phy_mdm6600_init,
162	.power_on = phy_mdm6600_power_on,
163	.power_off = phy_mdm6600_power_off,
164	.owner = THIS_MODULE,
165};
166
167/**
168 * phy_mdm6600_cmd() - send a command request to mdm6600
169 * @ddata: device driver data
170 * @val: value of cmd to be set
171 *
172 * Configures the three command request GPIOs to the specified value.
173 */
174static void phy_mdm6600_cmd(struct phy_mdm6600 *ddata, int val)
175{
176	DECLARE_BITMAP(values, PHY_MDM6600_NR_CMD_LINES);
177
178	values[0] = val;
179
180	gpiod_multi_set_value_cansleep(ddata->cmd_gpios, values);
181}
182
183/**
184 * phy_mdm6600_status() - read mdm6600 status lines
185 * @work: work structure
186 */
187static void phy_mdm6600_status(struct work_struct *work)
188{
189	struct phy_mdm6600 *ddata;
190	struct device *dev;
191	DECLARE_BITMAP(values, PHY_MDM6600_NR_STATUS_LINES);
192	int error;
193
194	ddata = container_of(work, struct phy_mdm6600, status_work.work);
195	dev = ddata->dev;
196
197	error = gpiod_get_array_value_cansleep(PHY_MDM6600_NR_STATUS_LINES,
198					       ddata->status_gpios->desc,
199					       ddata->status_gpios->info,
200					       values);
201	if (error)
202		return;
203
204	ddata->status = values[0] & ((1 << PHY_MDM6600_NR_STATUS_LINES) - 1);
205
206	dev_info(dev, "modem status: %i %s\n",
207		 ddata->status,
208		 phy_mdm6600_status_name[ddata->status]);
209	complete(&ddata->ack);
210}
211
212static irqreturn_t phy_mdm6600_irq_thread(int irq, void *data)
213{
214	struct phy_mdm6600 *ddata = data;
215
216	schedule_delayed_work(&ddata->status_work, msecs_to_jiffies(10));
217
218	return IRQ_HANDLED;
219}
220
221/**
222 * phy_mdm6600_wakeirq_thread - handle mode1 line OOB wake after booting
223 * @irq: interrupt
224 * @data: interrupt handler data
225 *
226 * GPIO mode1 is used initially as output to configure the USB boot
227 * mode for mdm6600. After booting it is used as input for OOB wake
228 * signal from mdm6600 to the SoC. Just use it for debug info only
229 * for now.
230 */
231static irqreturn_t phy_mdm6600_wakeirq_thread(int irq, void *data)
232{
233	struct phy_mdm6600 *ddata = data;
234	struct gpio_desc *mode_gpio1;
235	int error, wakeup;
236
237	mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1];
238	wakeup = gpiod_get_value(mode_gpio1);
239	if (!wakeup)
240		return IRQ_NONE;
241
242	dev_dbg(ddata->dev, "OOB wake on mode_gpio1: %i\n", wakeup);
243	error = pm_runtime_get_sync(ddata->dev);
244	if (error < 0) {
245		pm_runtime_put_noidle(ddata->dev);
246
247		return IRQ_NONE;
248	}
249
250	/* Just wake-up and kick the autosuspend timer */
251	pm_runtime_mark_last_busy(ddata->dev);
252	pm_runtime_put_autosuspend(ddata->dev);
253
254	return IRQ_HANDLED;
255}
256
257/**
258 * phy_mdm6600_init_irq() - initialize mdm6600 status IRQ lines
259 * @ddata: device driver data
260 */
261static void phy_mdm6600_init_irq(struct phy_mdm6600 *ddata)
262{
263	struct device *dev = ddata->dev;
264	int i, error, irq;
265
266	for (i = PHY_MDM6600_STATUS0;
267	     i <= PHY_MDM6600_STATUS2; i++) {
268		struct gpio_desc *gpio = ddata->status_gpios->desc[i];
269
270		irq = gpiod_to_irq(gpio);
271		if (irq <= 0)
272			continue;
273
274		error = devm_request_threaded_irq(dev, irq, NULL,
275					phy_mdm6600_irq_thread,
276					IRQF_TRIGGER_RISING |
277					IRQF_TRIGGER_FALLING |
278					IRQF_ONESHOT,
279					"mdm6600",
280					ddata);
281		if (error)
282			dev_warn(dev, "no modem status irq%i: %i\n",
283				 irq, error);
284	}
285}
286
287struct phy_mdm6600_map {
288	const char *name;
289	int direction;
290};
291
292static const struct phy_mdm6600_map
293phy_mdm6600_ctrl_gpio_map[PHY_MDM6600_NR_CTRL_LINES] = {
294	{ "enable", GPIOD_OUT_LOW, },		/* low = phy disabled */
295	{ "power", GPIOD_OUT_LOW, },		/* low = off */
296	{ "reset", GPIOD_OUT_HIGH, },		/* high = reset */
297};
298
299/**
300 * phy_mdm6600_init_lines() - initialize mdm6600 GPIO lines
301 * @ddata: device driver data
302 */
303static int phy_mdm6600_init_lines(struct phy_mdm6600 *ddata)
304{
305	struct device *dev = ddata->dev;
306	int i;
307
308	/* MDM6600 control lines */
309	for (i = 0; i < ARRAY_SIZE(phy_mdm6600_ctrl_gpio_map); i++) {
310		const struct phy_mdm6600_map *map =
311			&phy_mdm6600_ctrl_gpio_map[i];
312		struct gpio_desc **gpio = &ddata->ctrl_gpios[i];
313
314		*gpio = devm_gpiod_get(dev, map->name, map->direction);
315		if (IS_ERR(*gpio)) {
316			dev_info(dev, "gpio %s error %li\n",
317				 map->name, PTR_ERR(*gpio));
318			return PTR_ERR(*gpio);
319		}
320	}
321
322	/* MDM6600 USB start-up mode output lines */
323	ddata->mode_gpios = devm_gpiod_get_array(dev, "motorola,mode",
324						 GPIOD_OUT_LOW);
325	if (IS_ERR(ddata->mode_gpios))
326		return PTR_ERR(ddata->mode_gpios);
327
328	if (ddata->mode_gpios->ndescs != PHY_MDM6600_NR_MODE_LINES)
329		return -EINVAL;
330
331	/* MDM6600 status input lines */
332	ddata->status_gpios = devm_gpiod_get_array(dev, "motorola,status",
333						   GPIOD_IN);
334	if (IS_ERR(ddata->status_gpios))
335		return PTR_ERR(ddata->status_gpios);
336
337	if (ddata->status_gpios->ndescs != PHY_MDM6600_NR_STATUS_LINES)
338		return -EINVAL;
339
340	/* MDM6600 cmd output lines */
341	ddata->cmd_gpios = devm_gpiod_get_array(dev, "motorola,cmd",
342						GPIOD_OUT_LOW);
343	if (IS_ERR(ddata->cmd_gpios))
344		return PTR_ERR(ddata->cmd_gpios);
345
346	if (ddata->cmd_gpios->ndescs != PHY_MDM6600_NR_CMD_LINES)
347		return -EINVAL;
348
349	return 0;
350}
351
352/**
353 * phy_mdm6600_device_power_on() - power on mdm6600 device
354 * @ddata: device driver data
355 *
356 * To get the integrated USB phy in MDM6600 takes some hoops. We must ensure
357 * the shared USB bootmode GPIOs are configured, then request modem start-up,
358 * reset and power-up.. And then we need to recycle the shared USB bootmode
359 * GPIOs as they are also used for Out of Band (OOB) wake for the USB and
360 * TS 27.010 serial mux.
361 */
362static int phy_mdm6600_device_power_on(struct phy_mdm6600 *ddata)
363{
364	struct gpio_desc *mode_gpio0, *mode_gpio1, *reset_gpio, *power_gpio;
365	int error = 0, wakeirq;
366
367	mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0];
368	mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1];
369	reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET];
370	power_gpio = ddata->ctrl_gpios[PHY_MDM6600_POWER];
371
372	/*
373	 * Shared GPIOs must be low for normal USB mode. After booting
374	 * they are used for OOB wake signaling. These can be also used
375	 * to configure USB flashing mode later on based on a module
376	 * parameter.
377	 */
378	gpiod_set_value_cansleep(mode_gpio0, 0);
379	gpiod_set_value_cansleep(mode_gpio1, 0);
380
381	/* Request start-up mode */
382	phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_NO_BYPASS);
383
384	/* Request a reset first */
385	gpiod_set_value_cansleep(reset_gpio, 0);
386	msleep(100);
387
388	/* Toggle power GPIO to request mdm6600 to start */
389	gpiod_set_value_cansleep(power_gpio, 1);
390	msleep(100);
391	gpiod_set_value_cansleep(power_gpio, 0);
392
393	/*
394	 * Looks like the USB PHY needs between 2.2 to 4 seconds.
395	 * If we try to use it before that, we will get L3 errors
396	 * from omap-usb-host trying to access the PHY. See also
397	 * phy_mdm6600_init() for -EPROBE_DEFER.
398	 */
399	msleep(PHY_MDM6600_PHY_DELAY_MS);
400	ddata->enabled = true;
401
402	/* Booting up the rest of MDM6600 will take total about 8 seconds */
403	dev_info(ddata->dev, "Waiting for power up request to complete..\n");
404	if (wait_for_completion_timeout(&ddata->ack,
405			msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS))) {
406		if (ddata->status > PHY_MDM6600_STATUS_PANIC &&
407		    ddata->status < PHY_MDM6600_STATUS_SHUTDOWN_ACK)
408			dev_info(ddata->dev, "Powered up OK\n");
409	} else {
410		ddata->enabled = false;
411		error = -ETIMEDOUT;
412		dev_err(ddata->dev, "Timed out powering up\n");
413	}
414
415	/* Reconfigure mode1 GPIO as input for OOB wake */
416	gpiod_direction_input(mode_gpio1);
417
418	wakeirq = gpiod_to_irq(mode_gpio1);
419	if (wakeirq <= 0)
420		return wakeirq;
421
422	error = devm_request_threaded_irq(ddata->dev, wakeirq, NULL,
423					  phy_mdm6600_wakeirq_thread,
424					  IRQF_TRIGGER_RISING |
425					  IRQF_TRIGGER_FALLING |
426					  IRQF_ONESHOT,
427					  "mdm6600-wake",
428					  ddata);
429	if (error)
430		dev_warn(ddata->dev, "no modem wakeirq irq%i: %i\n",
431			 wakeirq, error);
432
433	ddata->running = true;
434
435	return error;
436}
437
438/**
439 * phy_mdm6600_device_power_off() - power off mdm6600 device
440 * @ddata: device driver data
441 */
442static void phy_mdm6600_device_power_off(struct phy_mdm6600 *ddata)
443{
444	struct gpio_desc *reset_gpio =
445		ddata->ctrl_gpios[PHY_MDM6600_RESET];
446	int error;
447
448	ddata->enabled = false;
449	phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_BP_SHUTDOWN_REQ);
450	msleep(100);
451
452	gpiod_set_value_cansleep(reset_gpio, 1);
453
454	dev_info(ddata->dev, "Waiting for power down request to complete.. ");
455	if (wait_for_completion_timeout(&ddata->ack,
456					msecs_to_jiffies(5000))) {
457		if (ddata->status == PHY_MDM6600_STATUS_PANIC)
458			dev_info(ddata->dev, "Powered down OK\n");
459	} else {
460		dev_err(ddata->dev, "Timed out powering down\n");
461	}
462
463	/*
464	 * Keep reset gpio high with padconf internal pull-up resistor to
465	 * prevent modem from waking up during deeper SoC idle states. The
466	 * gpio bank lines can have glitches if not in the always-on wkup
467	 * domain.
468	 */
469	error = pinctrl_pm_select_sleep_state(ddata->dev);
470	if (error)
471		dev_warn(ddata->dev, "%s: error with sleep_state: %i\n",
472			 __func__, error);
473}
474
475static void phy_mdm6600_deferred_power_on(struct work_struct *work)
476{
477	struct phy_mdm6600 *ddata;
478	int error;
479
480	ddata = container_of(work, struct phy_mdm6600, bootup_work.work);
481
482	error = phy_mdm6600_device_power_on(ddata);
483	if (error)
484		dev_err(ddata->dev, "Device not functional\n");
485}
486
487/*
488 * USB suspend puts mdm6600 into low power mode. For any n_gsm using apps,
489 * we need to keep the modem awake by kicking it's mode0 GPIO. This will
490 * keep the modem awake for about 1.2 seconds. When no n_gsm apps are using
491 * the modem, runtime PM auto mode can be enabled so modem can enter low
492 * power mode.
493 */
494static void phy_mdm6600_wake_modem(struct phy_mdm6600 *ddata)
495{
496	struct gpio_desc *mode_gpio0;
497
498	mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0];
499	gpiod_set_value_cansleep(mode_gpio0, 1);
500	usleep_range(5, 15);
501	gpiod_set_value_cansleep(mode_gpio0, 0);
502	if (ddata->awake)
503		usleep_range(5, 15);
504	else
505		msleep(MDM6600_MODEM_WAKE_DELAY_MS);
506}
507
508static void phy_mdm6600_modem_wake(struct work_struct *work)
509{
510	struct phy_mdm6600 *ddata;
511
512	ddata = container_of(work, struct phy_mdm6600, modem_wake_work.work);
513	phy_mdm6600_wake_modem(ddata);
514
515	/*
516	 * The modem does not always stay awake 1.2 seconds after toggling
517	 * the wake GPIO, and sometimes it idles after about some 600 ms
518	 * making writes time out.
519	 */
520	schedule_delayed_work(&ddata->modem_wake_work,
521			      msecs_to_jiffies(PHY_MDM6600_WAKE_KICK_MS));
522}
523
524static int __maybe_unused phy_mdm6600_runtime_suspend(struct device *dev)
525{
526	struct phy_mdm6600 *ddata = dev_get_drvdata(dev);
527
528	cancel_delayed_work_sync(&ddata->modem_wake_work);
529	ddata->awake = false;
530
531	return 0;
532}
533
534static int __maybe_unused phy_mdm6600_runtime_resume(struct device *dev)
535{
536	struct phy_mdm6600 *ddata = dev_get_drvdata(dev);
537
538	phy_mdm6600_modem_wake(&ddata->modem_wake_work.work);
539	ddata->awake = true;
540
541	return 0;
542}
543
544static const struct dev_pm_ops phy_mdm6600_pm_ops = {
545	SET_RUNTIME_PM_OPS(phy_mdm6600_runtime_suspend,
546			   phy_mdm6600_runtime_resume, NULL)
547};
548
549static const struct of_device_id phy_mdm6600_id_table[] = {
550	{ .compatible = "motorola,mapphone-mdm6600", },
551	{},
552};
553MODULE_DEVICE_TABLE(of, phy_mdm6600_id_table);
554
555static int phy_mdm6600_probe(struct platform_device *pdev)
556{
557	struct phy_mdm6600 *ddata;
558	int error;
559
560	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
561	if (!ddata)
562		return -ENOMEM;
563
564	INIT_DELAYED_WORK(&ddata->bootup_work,
565			  phy_mdm6600_deferred_power_on);
566	INIT_DELAYED_WORK(&ddata->status_work, phy_mdm6600_status);
567	INIT_DELAYED_WORK(&ddata->modem_wake_work, phy_mdm6600_modem_wake);
568	init_completion(&ddata->ack);
569
570	ddata->dev = &pdev->dev;
571	platform_set_drvdata(pdev, ddata);
572
573	error = phy_mdm6600_init_lines(ddata);
574	if (error)
575		return error;
576
577	phy_mdm6600_init_irq(ddata);
578	schedule_delayed_work(&ddata->bootup_work, 0);
579
580	/*
581	 * See phy_mdm6600_device_power_on(). We should be able
582	 * to remove this eventually when ohci-platform can deal
583	 * with -EPROBE_DEFER.
584	 */
585	msleep(PHY_MDM6600_PHY_DELAY_MS + 500);
586
587	/*
588	 * Enable PM runtime only after PHY has been powered up properly.
589	 * It is currently only needed after USB suspends mdm6600 and n_gsm
590	 * needs to access the device. We don't want to do this earlier as
591	 * gpio mode0 pin doubles as mdm6600 wake-up gpio.
592	 */
593	pm_runtime_use_autosuspend(ddata->dev);
594	pm_runtime_set_autosuspend_delay(ddata->dev,
595					 MDM6600_MODEM_IDLE_DELAY_MS);
596	pm_runtime_enable(ddata->dev);
597	error = pm_runtime_get_sync(ddata->dev);
598	if (error < 0) {
599		dev_warn(ddata->dev, "failed to wake modem: %i\n", error);
600		pm_runtime_put_noidle(ddata->dev);
601		goto cleanup;
602	}
603
604	ddata->generic_phy = devm_phy_create(ddata->dev, NULL, &gpio_usb_ops);
605	if (IS_ERR(ddata->generic_phy)) {
606		error = PTR_ERR(ddata->generic_phy);
607		goto idle;
608	}
609
610	phy_set_drvdata(ddata->generic_phy, ddata);
611
612	ddata->phy_provider =
613		devm_of_phy_provider_register(ddata->dev,
614					      of_phy_simple_xlate);
615	if (IS_ERR(ddata->phy_provider))
616		error = PTR_ERR(ddata->phy_provider);
617
618idle:
619	pm_runtime_mark_last_busy(ddata->dev);
620	pm_runtime_put_autosuspend(ddata->dev);
621
622cleanup:
623	if (error < 0) {
624		phy_mdm6600_device_power_off(ddata);
625		pm_runtime_disable(ddata->dev);
626		pm_runtime_dont_use_autosuspend(ddata->dev);
627	}
628
629	return error;
630}
631
632static void phy_mdm6600_remove(struct platform_device *pdev)
633{
634	struct phy_mdm6600 *ddata = platform_get_drvdata(pdev);
635	struct gpio_desc *reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET];
636
637	pm_runtime_get_noresume(ddata->dev);
638	pm_runtime_dont_use_autosuspend(ddata->dev);
639	pm_runtime_put_sync(ddata->dev);
640	pm_runtime_disable(ddata->dev);
641
642	if (!ddata->running)
643		wait_for_completion_timeout(&ddata->ack,
644			msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS));
645
646	gpiod_set_value_cansleep(reset_gpio, 1);
647	phy_mdm6600_device_power_off(ddata);
648
649	cancel_delayed_work_sync(&ddata->modem_wake_work);
650	cancel_delayed_work_sync(&ddata->bootup_work);
651	cancel_delayed_work_sync(&ddata->status_work);
652}
653
654static struct platform_driver phy_mdm6600_driver = {
655	.probe = phy_mdm6600_probe,
656	.remove = phy_mdm6600_remove,
657	.driver = {
658		.name = "phy-mapphone-mdm6600",
659		.pm = &phy_mdm6600_pm_ops,
660		.of_match_table = of_match_ptr(phy_mdm6600_id_table),
661	},
662};
663
664module_platform_driver(phy_mdm6600_driver);
665
666MODULE_ALIAS("platform:gpio_usb");
667MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
668MODULE_DESCRIPTION("mdm6600 gpio usb phy driver");
669MODULE_LICENSE("GPL v2");