omap_remoteproc.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * OMAP Remote Processor driver
   4 *
   5 * Copyright (C) 2011-2020 Texas Instruments Incorporated - http://www.ti.com/
   6 * Copyright (C) 2011 Google, Inc.
   7 *
   8 * Ohad Ben-Cohen <ohad@wizery.com>
   9 * Brian Swetland <swetland@google.com>
  10 * Fernando Guzman Lugo <fernando.lugo@ti.com>
  11 * Mark Grosen <mgrosen@ti.com>
  12 * Suman Anna <s-anna@ti.com>
  13 * Hari Kanigeri <h-kanigeri2@ti.com>
  14 */
  15
  16#include <linux/kernel.h>
  17#include <linux/module.h>
  18#include <linux/clk.h>
  19#include <linux/clk/ti.h>
  20#include <linux/err.h>
  21#include <linux/io.h>
  22#include <linux/of.h>
  23#include <linux/of_platform.h>
  24#include <linux/of_reserved_mem.h>
  25#include <linux/platform_device.h>
  26#include <linux/pm_runtime.h>
  27#include <linux/dma-mapping.h>
  28#include <linux/interrupt.h>
  29#include <linux/remoteproc.h>
  30#include <linux/mailbox_client.h>
  31#include <linux/omap-iommu.h>
  32#include <linux/omap-mailbox.h>
  33#include <linux/regmap.h>
  34#include <linux/mfd/syscon.h>
  35#include <linux/reset.h>
  36#include <clocksource/timer-ti-dm.h>
  37
  38#include <linux/platform_data/dmtimer-omap.h>
  39
  40#ifdef CONFIG_ARM_DMA_USE_IOMMU
  41#include <asm/dma-iommu.h>
  42#endif
  43
  44#include "omap_remoteproc.h"
  45#include "remoteproc_internal.h"
  46
  47/* default auto-suspend delay (ms) */
  48#define DEFAULT_AUTOSUSPEND_DELAY		10000
  49
  50/**
  51 * struct omap_rproc_boot_data - boot data structure for the DSP omap rprocs
  52 * @syscon: regmap handle for the system control configuration module
  53 * @boot_reg: boot register offset within the @syscon regmap
  54 * @boot_reg_shift: bit-field shift required for the boot address value in
  55 *		    @boot_reg
  56 */
  57struct omap_rproc_boot_data {
  58	struct regmap *syscon;
  59	unsigned int boot_reg;
  60	unsigned int boot_reg_shift;
  61};
  62
  63/**
  64 * struct omap_rproc_mem - internal memory structure
  65 * @cpu_addr: MPU virtual address of the memory region
  66 * @bus_addr: bus address used to access the memory region
  67 * @dev_addr: device address of the memory region from DSP view
  68 * @size: size of the memory region
  69 */
  70struct omap_rproc_mem {
  71	void __iomem *cpu_addr;
  72	phys_addr_t bus_addr;
  73	u32 dev_addr;
  74	size_t size;
  75};
  76
  77/**
  78 * struct omap_rproc_timer - data structure for a timer used by a omap rproc
  79 * @odt: timer pointer
  80 * @timer_ops: OMAP dmtimer ops for @odt timer
  81 * @irq: timer irq
  82 */
  83struct omap_rproc_timer {
  84	struct omap_dm_timer *odt;
  85	const struct omap_dm_timer_ops *timer_ops;
  86	int irq;
  87};
  88
  89/**
  90 * struct omap_rproc - omap remote processor state
  91 * @mbox: mailbox channel handle
  92 * @client: mailbox client to request the mailbox channel
  93 * @boot_data: boot data structure for setting processor boot address
  94 * @mem: internal memory regions data
  95 * @num_mems: number of internal memory regions
  96 * @num_timers: number of rproc timer(s)
  97 * @num_wd_timers: number of rproc watchdog timers
  98 * @timers: timer(s) info used by rproc
  99 * @autosuspend_delay: auto-suspend delay value to be used for runtime pm
 100 * @need_resume: if true a resume is needed in the system resume callback
 101 * @rproc: rproc handle
 102 * @reset: reset handle
 103 * @pm_comp: completion primitive to sync for suspend response
 104 * @fck: functional clock for the remoteproc
 105 * @suspend_acked: state machine flag to store the suspend request ack
 106 */
 107struct omap_rproc {
 108	struct mbox_chan *mbox;
 109	struct mbox_client client;
 110	struct omap_rproc_boot_data *boot_data;
 111	struct omap_rproc_mem *mem;
 112	int num_mems;
 113	int num_timers;
 114	int num_wd_timers;
 115	struct omap_rproc_timer *timers;
 116	int autosuspend_delay;
 117	bool need_resume;
 118	struct rproc *rproc;
 119	struct reset_control *reset;
 120	struct completion pm_comp;
 121	struct clk *fck;
 122	bool suspend_acked;
 123};
 124
 125/**
 126 * struct omap_rproc_mem_data - memory definitions for an omap remote processor
 127 * @name: name for this memory entry
 128 * @dev_addr: device address for the memory entry
 129 */
 130struct omap_rproc_mem_data {
 131	const char *name;
 132	const u32 dev_addr;
 133};
 134
 135/**
 136 * struct omap_rproc_dev_data - device data for the omap remote processor
 137 * @device_name: device name of the remote processor
 138 * @mems: memory definitions for this remote processor
 139 */
 140struct omap_rproc_dev_data {
 141	const char *device_name;
 142	const struct omap_rproc_mem_data *mems;
 143};
 144
 145/**
 146 * omap_rproc_request_timer() - request a timer for a remoteproc
 147 * @dev: device requesting the timer
 148 * @np: device node pointer to the desired timer
 149 * @timer: handle to a struct omap_rproc_timer to return the timer handle
 150 *
 151 * This helper function is used primarily to request a timer associated with
 152 * a remoteproc. The returned handle is stored in the .odt field of the
 153 * @timer structure passed in, and is used to invoke other timer specific
 154 * ops (like starting a timer either during device initialization or during
 155 * a resume operation, or for stopping/freeing a timer).
 156 *
 157 * Return: 0 on success, otherwise an appropriate failure
 158 */
 159static int omap_rproc_request_timer(struct device *dev, struct device_node *np,
 160				    struct omap_rproc_timer *timer)
 161{
 162	int ret;
 163
 164	timer->odt = timer->timer_ops->request_by_node(np);
 165	if (!timer->odt) {
 166		dev_err(dev, "request for timer node %p failed\n", np);
 167		return -EBUSY;
 168	}
 169
 170	ret = timer->timer_ops->set_source(timer->odt, OMAP_TIMER_SRC_SYS_CLK);
 171	if (ret) {
 172		dev_err(dev, "error setting OMAP_TIMER_SRC_SYS_CLK as source for timer node %p\n",
 173			np);
 174		timer->timer_ops->free(timer->odt);
 175		return ret;
 176	}
 177
 178	/* clean counter, remoteproc code will set the value */
 179	timer->timer_ops->set_load(timer->odt, 0);
 180
 181	return 0;
 182}
 183
 184/**
 185 * omap_rproc_start_timer() - start a timer for a remoteproc
 186 * @timer: handle to a OMAP rproc timer
 187 *
 188 * This helper function is used to start a timer associated with a remoteproc,
 189 * obtained using the request_timer ops. The helper function needs to be
 190 * invoked by the driver to start the timer (during device initialization)
 191 * or to just resume the timer.
 192 *
 193 * Return: 0 on success, otherwise a failure as returned by DMTimer ops
 194 */
 195static inline int omap_rproc_start_timer(struct omap_rproc_timer *timer)
 196{
 197	return timer->timer_ops->start(timer->odt);
 198}
 199
 200/**
 201 * omap_rproc_stop_timer() - stop a timer for a remoteproc
 202 * @timer: handle to a OMAP rproc timer
 203 *
 204 * This helper function is used to disable a timer associated with a
 205 * remoteproc, and needs to be called either during a device shutdown
 206 * or suspend operation. The separate helper function allows the driver
 207 * to just stop a timer without having to release the timer during a
 208 * suspend operation.
 209 *
 210 * Return: 0 on success, otherwise a failure as returned by DMTimer ops
 211 */
 212static inline int omap_rproc_stop_timer(struct omap_rproc_timer *timer)
 213{
 214	return timer->timer_ops->stop(timer->odt);
 215}
 216
 217/**
 218 * omap_rproc_release_timer() - release a timer for a remoteproc
 219 * @timer: handle to a OMAP rproc timer
 220 *
 221 * This helper function is used primarily to release a timer associated
 222 * with a remoteproc. The dmtimer will be available for other clients to
 223 * use once released.
 224 *
 225 * Return: 0 on success, otherwise a failure as returned by DMTimer ops
 226 */
 227static inline int omap_rproc_release_timer(struct omap_rproc_timer *timer)
 228{
 229	return timer->timer_ops->free(timer->odt);
 230}
 231
 232/**
 233 * omap_rproc_get_timer_irq() - get the irq for a timer
 234 * @timer: handle to a OMAP rproc timer
 235 *
 236 * This function is used to get the irq associated with a watchdog timer. The
 237 * function is called by the OMAP remoteproc driver to register a interrupt
 238 * handler to handle watchdog events on the remote processor.
 239 *
 240 * Return: irq id on success, otherwise a failure as returned by DMTimer ops
 241 */
 242static inline int omap_rproc_get_timer_irq(struct omap_rproc_timer *timer)
 243{
 244	return timer->timer_ops->get_irq(timer->odt);
 245}
 246
 247/**
 248 * omap_rproc_ack_timer_irq() - acknowledge a timer irq
 249 * @timer: handle to a OMAP rproc timer
 250 *
 251 * This function is used to clear the irq associated with a watchdog timer.
 252 * The function is called by the OMAP remoteproc upon a watchdog event on the
 253 * remote processor to clear the interrupt status of the watchdog timer.
 254 */
 255static inline void omap_rproc_ack_timer_irq(struct omap_rproc_timer *timer)
 256{
 257	timer->timer_ops->write_status(timer->odt, OMAP_TIMER_INT_OVERFLOW);
 258}
 259
 260/**
 261 * omap_rproc_watchdog_isr() - Watchdog ISR handler for remoteproc device
 262 * @irq: IRQ number associated with a watchdog timer
 263 * @data: IRQ handler data
 264 *
 265 * This ISR routine executes the required necessary low-level code to
 266 * acknowledge a watchdog timer interrupt. There can be multiple watchdog
 267 * timers associated with a rproc (like IPUs which have 2 watchdog timers,
 268 * one per Cortex M3/M4 core), so a lookup has to be performed to identify
 269 * the timer to acknowledge its interrupt.
 270 *
 271 * The function also invokes rproc_report_crash to report the watchdog event
 272 * to the remoteproc driver core, to trigger a recovery.
 273 *
 274 * Return: IRQ_HANDLED on success, otherwise IRQ_NONE
 275 */
 276static irqreturn_t omap_rproc_watchdog_isr(int irq, void *data)
 277{
 278	struct rproc *rproc = data;
 279	struct omap_rproc *oproc = rproc->priv;
 280	struct device *dev = rproc->dev.parent;
 281	struct omap_rproc_timer *timers = oproc->timers;
 282	struct omap_rproc_timer *wd_timer = NULL;
 283	int num_timers = oproc->num_timers + oproc->num_wd_timers;
 284	int i;
 285
 286	for (i = oproc->num_timers; i < num_timers; i++) {
 287		if (timers[i].irq > 0 && irq == timers[i].irq) {
 288			wd_timer = &timers[i];
 289			break;
 290		}
 291	}
 292
 293	if (!wd_timer) {
 294		dev_err(dev, "invalid timer\n");
 295		return IRQ_NONE;
 296	}
 297
 298	omap_rproc_ack_timer_irq(wd_timer);
 299
 300	rproc_report_crash(rproc, RPROC_WATCHDOG);
 301
 302	return IRQ_HANDLED;
 303}
 304
 305/**
 306 * omap_rproc_enable_timers() - enable the timers for a remoteproc
 307 * @rproc: handle of a remote processor
 308 * @configure: boolean flag used to acquire and configure the timer handle
 309 *
 310 * This function is used primarily to enable the timers associated with
 311 * a remoteproc. The configure flag is provided to allow the driver
 312 * to either acquire and start a timer (during device initialization) or
 313 * to just start a timer (during a resume operation).
 314 *
 315 * Return: 0 on success, otherwise an appropriate failure
 316 */
 317static int omap_rproc_enable_timers(struct rproc *rproc, bool configure)
 318{
 319	int i;
 320	int ret = 0;
 321	struct platform_device *tpdev;
 322	struct dmtimer_platform_data *tpdata;
 323	const struct omap_dm_timer_ops *timer_ops;
 324	struct omap_rproc *oproc = rproc->priv;
 325	struct omap_rproc_timer *timers = oproc->timers;
 326	struct device *dev = rproc->dev.parent;
 327	struct device_node *np = NULL;
 328	int num_timers = oproc->num_timers + oproc->num_wd_timers;
 329
 330	if (!num_timers)
 331		return 0;
 332
 333	if (!configure)
 334		goto start_timers;
 335
 336	for (i = 0; i < num_timers; i++) {
 337		if (i < oproc->num_timers)
 338			np = of_parse_phandle(dev->of_node, "ti,timers", i);
 339		else
 340			np = of_parse_phandle(dev->of_node,
 341					      "ti,watchdog-timers",
 342					      (i - oproc->num_timers));
 343		if (!np) {
 344			ret = -ENXIO;
 345			dev_err(dev, "device node lookup for timer at index %d failed: %d\n",
 346				i < oproc->num_timers ? i :
 347				i - oproc->num_timers, ret);
 348			goto free_timers;
 349		}
 350
 351		tpdev = of_find_device_by_node(np);
 352		if (!tpdev) {
 353			ret = -ENODEV;
 354			dev_err(dev, "could not get timer platform device\n");
 355			goto put_node;
 356		}
 357
 358		tpdata = dev_get_platdata(&tpdev->dev);
 359		put_device(&tpdev->dev);
 360		if (!tpdata) {
 361			ret = -EINVAL;
 362			dev_err(dev, "dmtimer pdata structure NULL\n");
 363			goto put_node;
 364		}
 365
 366		timer_ops = tpdata->timer_ops;
 367		if (!timer_ops || !timer_ops->request_by_node ||
 368		    !timer_ops->set_source || !timer_ops->set_load ||
 369		    !timer_ops->free || !timer_ops->start ||
 370		    !timer_ops->stop || !timer_ops->get_irq ||
 371		    !timer_ops->write_status) {
 372			ret = -EINVAL;
 373			dev_err(dev, "device does not have required timer ops\n");
 374			goto put_node;
 375		}
 376
 377		timers[i].irq = -1;
 378		timers[i].timer_ops = timer_ops;
 379		ret = omap_rproc_request_timer(dev, np, &timers[i]);
 380		if (ret) {
 381			dev_err(dev, "request for timer %p failed: %d\n", np,
 382				ret);
 383			goto put_node;
 384		}
 385		of_node_put(np);
 386
 387		if (i >= oproc->num_timers) {
 388			timers[i].irq = omap_rproc_get_timer_irq(&timers[i]);
 389			if (timers[i].irq < 0) {
 390				dev_err(dev, "get_irq for timer %p failed: %d\n",
 391					np, timers[i].irq);
 392				ret = -EBUSY;
 393				goto free_timers;
 394			}
 395
 396			ret = request_irq(timers[i].irq,
 397					  omap_rproc_watchdog_isr, IRQF_SHARED,
 398					  "rproc-wdt", rproc);
 399			if (ret) {
 400				dev_err(dev, "error requesting irq for timer %p\n",
 401					np);
 402				omap_rproc_release_timer(&timers[i]);
 403				timers[i].odt = NULL;
 404				timers[i].timer_ops = NULL;
 405				timers[i].irq = -1;
 406				goto free_timers;
 407			}
 408		}
 409	}
 410
 411start_timers:
 412	for (i = 0; i < num_timers; i++) {
 413		ret = omap_rproc_start_timer(&timers[i]);
 414		if (ret) {
 415			dev_err(dev, "start timer %p failed failed: %d\n", np,
 416				ret);
 417			break;
 418		}
 419	}
 420	if (ret) {
 421		while (i >= 0) {
 422			omap_rproc_stop_timer(&timers[i]);
 423			i--;
 424		}
 425		goto put_node;
 426	}
 427	return 0;
 428
 429put_node:
 430	if (configure)
 431		of_node_put(np);
 432free_timers:
 433	while (i--) {
 434		if (i >= oproc->num_timers)
 435			free_irq(timers[i].irq, rproc);
 436		omap_rproc_release_timer(&timers[i]);
 437		timers[i].odt = NULL;
 438		timers[i].timer_ops = NULL;
 439		timers[i].irq = -1;
 440	}
 441
 442	return ret;
 443}
 444
 445/**
 446 * omap_rproc_disable_timers() - disable the timers for a remoteproc
 447 * @rproc: handle of a remote processor
 448 * @configure: boolean flag used to release the timer handle
 449 *
 450 * This function is used primarily to disable the timers associated with
 451 * a remoteproc. The configure flag is provided to allow the driver
 452 * to either stop and release a timer (during device shutdown) or to just
 453 * stop a timer (during a suspend operation).
 454 *
 455 * Return: 0 on success or no timers
 456 */
 457static int omap_rproc_disable_timers(struct rproc *rproc, bool configure)
 458{
 459	int i;
 460	struct omap_rproc *oproc = rproc->priv;
 461	struct omap_rproc_timer *timers = oproc->timers;
 462	int num_timers = oproc->num_timers + oproc->num_wd_timers;
 463
 464	if (!num_timers)
 465		return 0;
 466
 467	for (i = 0; i < num_timers; i++) {
 468		omap_rproc_stop_timer(&timers[i]);
 469		if (configure) {
 470			if (i >= oproc->num_timers)
 471				free_irq(timers[i].irq, rproc);
 472			omap_rproc_release_timer(&timers[i]);
 473			timers[i].odt = NULL;
 474			timers[i].timer_ops = NULL;
 475			timers[i].irq = -1;
 476		}
 477	}
 478
 479	return 0;
 480}
 481
 482/**
 483 * omap_rproc_mbox_callback() - inbound mailbox message handler
 484 * @client: mailbox client pointer used for requesting the mailbox channel
 485 * @data: mailbox payload
 486 *
 487 * This handler is invoked by omap's mailbox driver whenever a mailbox
 488 * message is received. Usually, the mailbox payload simply contains
 489 * the index of the virtqueue that is kicked by the remote processor,
 490 * and we let remoteproc core handle it.
 491 *
 492 * In addition to virtqueue indices, we also have some out-of-band values
 493 * that indicates different events. Those values are deliberately very
 494 * big so they don't coincide with virtqueue indices.
 495 */
 496static void omap_rproc_mbox_callback(struct mbox_client *client, void *data)
 497{
 498	struct omap_rproc *oproc = container_of(client, struct omap_rproc,
 499						client);
 500	struct device *dev = oproc->rproc->dev.parent;
 501	const char *name = oproc->rproc->name;
 502	u32 msg = (u32)data;
 503
 504	dev_dbg(dev, "mbox msg: 0x%x\n", msg);
 505
 506	switch (msg) {
 507	case RP_MBOX_CRASH:
 508		/*
 509		 * remoteproc detected an exception, notify the rproc core.
 510		 * The remoteproc core will handle the recovery.
 511		 */
 512		dev_err(dev, "omap rproc %s crashed\n", name);
 513		rproc_report_crash(oproc->rproc, RPROC_FATAL_ERROR);
 514		break;
 515	case RP_MBOX_ECHO_REPLY:
 516		dev_info(dev, "received echo reply from %s\n", name);
 517		break;
 518	case RP_MBOX_SUSPEND_ACK:
 519	case RP_MBOX_SUSPEND_CANCEL:
 520		oproc->suspend_acked = msg == RP_MBOX_SUSPEND_ACK;
 521		complete(&oproc->pm_comp);
 522		break;
 523	default:
 524		if (msg >= RP_MBOX_READY && msg < RP_MBOX_END_MSG)
 525			return;
 526		if (msg > oproc->rproc->max_notifyid) {
 527			dev_dbg(dev, "dropping unknown message 0x%x", msg);
 528			return;
 529		}
 530		/* msg contains the index of the triggered vring */
 531		if (rproc_vq_interrupt(oproc->rproc, msg) == IRQ_NONE)
 532			dev_dbg(dev, "no message was found in vqid %d\n", msg);
 533	}
 534}
 535
 536/* kick a virtqueue */
 537static void omap_rproc_kick(struct rproc *rproc, int vqid)
 538{
 539	struct omap_rproc *oproc = rproc->priv;
 540	struct device *dev = rproc->dev.parent;
 541	int ret;
 542
 543	/* wake up the rproc before kicking it */
 544	ret = pm_runtime_get_sync(dev);
 545	if (WARN_ON(ret < 0)) {
 546		dev_err(dev, "pm_runtime_get_sync() failed during kick, ret = %d\n",
 547			ret);
 548		pm_runtime_put_noidle(dev);
 549		return;
 550	}
 551
 552	/* send the index of the triggered virtqueue in the mailbox payload */
 553	ret = mbox_send_message(oproc->mbox, (void *)vqid);
 554	if (ret < 0)
 555		dev_err(dev, "failed to send mailbox message, status = %d\n",
 556			ret);
 557
 558	pm_runtime_put_autosuspend(dev);
 559}
 560
 561/**
 562 * omap_rproc_write_dsp_boot_addr() - set boot address for DSP remote processor
 563 * @rproc: handle of a remote processor
 564 *
 565 * Set boot address for a supported DSP remote processor.
 566 *
 567 * Return: 0 on success, or -EINVAL if boot address is not aligned properly
 568 */
 569static int omap_rproc_write_dsp_boot_addr(struct rproc *rproc)
 570{
 571	struct device *dev = rproc->dev.parent;
 572	struct omap_rproc *oproc = rproc->priv;
 573	struct omap_rproc_boot_data *bdata = oproc->boot_data;
 574	u32 offset = bdata->boot_reg;
 575	u32 value;
 576	u32 mask;
 577
 578	if (rproc->bootaddr & (SZ_1K - 1)) {
 579		dev_err(dev, "invalid boot address 0x%llx, must be aligned on a 1KB boundary\n",
 580			rproc->bootaddr);
 581		return -EINVAL;
 582	}
 583
 584	value = rproc->bootaddr >> bdata->boot_reg_shift;
 585	mask = ~(SZ_1K - 1) >> bdata->boot_reg_shift;
 586
 587	return regmap_update_bits(bdata->syscon, offset, mask, value);
 588}
 589
 590/*
 591 * Power up the remote processor.
 592 *
 593 * This function will be invoked only after the firmware for this rproc
 594 * was loaded, parsed successfully, and all of its resource requirements
 595 * were met.
 596 */
 597static int omap_rproc_start(struct rproc *rproc)
 598{
 599	struct omap_rproc *oproc = rproc->priv;
 600	struct device *dev = rproc->dev.parent;
 601	int ret;
 602	struct mbox_client *client = &oproc->client;
 603
 604	if (oproc->boot_data) {
 605		ret = omap_rproc_write_dsp_boot_addr(rproc);
 606		if (ret)
 607			return ret;
 608	}
 609
 610	client->dev = dev;
 611	client->tx_done = NULL;
 612	client->rx_callback = omap_rproc_mbox_callback;
 613	client->tx_block = false;
 614	client->knows_txdone = false;
 615
 616	oproc->mbox = mbox_request_channel(client, 0);
 617	if (IS_ERR(oproc->mbox)) {
 618		ret = -EBUSY;
 619		dev_err(dev, "mbox_request_channel failed: %ld\n",
 620			PTR_ERR(oproc->mbox));
 621		return ret;
 622	}
 623
 624	/*
 625	 * Ping the remote processor. this is only for sanity-sake;
 626	 * there is no functional effect whatsoever.
 627	 *
 628	 * Note that the reply will _not_ arrive immediately: this message
 629	 * will wait in the mailbox fifo until the remote processor is booted.
 630	 */
 631	ret = mbox_send_message(oproc->mbox, (void *)RP_MBOX_ECHO_REQUEST);
 632	if (ret < 0) {
 633		dev_err(dev, "mbox_send_message failed: %d\n", ret);
 634		goto put_mbox;
 635	}
 636
 637	ret = omap_rproc_enable_timers(rproc, true);
 638	if (ret) {
 639		dev_err(dev, "omap_rproc_enable_timers failed: %d\n", ret);
 640		goto put_mbox;
 641	}
 642
 643	ret = reset_control_deassert(oproc->reset);
 644	if (ret) {
 645		dev_err(dev, "reset control deassert failed: %d\n", ret);
 646		goto disable_timers;
 647	}
 648
 649	/*
 650	 * remote processor is up, so update the runtime pm status and
 651	 * enable the auto-suspend. The device usage count is incremented
 652	 * manually for balancing it for auto-suspend
 653	 */
 654	pm_runtime_set_active(dev);
 655	pm_runtime_use_autosuspend(dev);
 656	pm_runtime_get_noresume(dev);
 657	pm_runtime_enable(dev);
 658	pm_runtime_put_autosuspend(dev);
 659
 660	return 0;
 661
 662disable_timers:
 663	omap_rproc_disable_timers(rproc, true);
 664put_mbox:
 665	mbox_free_channel(oproc->mbox);
 666	return ret;
 667}
 668
 669/* power off the remote processor */
 670static int omap_rproc_stop(struct rproc *rproc)
 671{
 672	struct device *dev = rproc->dev.parent;
 673	struct omap_rproc *oproc = rproc->priv;
 674	int ret;
 675
 676	/*
 677	 * cancel any possible scheduled runtime suspend by incrementing
 678	 * the device usage count, and resuming the device. The remoteproc
 679	 * also needs to be woken up if suspended, to avoid the remoteproc
 680	 * OS to continue to remember any context that it has saved, and
 681	 * avoid potential issues in misindentifying a subsequent device
 682	 * reboot as a power restore boot
 683	 */
 684	ret = pm_runtime_get_sync(dev);
 685	if (ret < 0) {
 686		pm_runtime_put_noidle(dev);
 687		return ret;
 688	}
 689
 690	ret = reset_control_assert(oproc->reset);
 691	if (ret)
 692		goto out;
 693
 694	ret = omap_rproc_disable_timers(rproc, true);
 695	if (ret)
 696		goto enable_device;
 697
 698	mbox_free_channel(oproc->mbox);
 699
 700	/*
 701	 * update the runtime pm states and status now that the remoteproc
 702	 * has stopped
 703	 */
 704	pm_runtime_disable(dev);
 705	pm_runtime_dont_use_autosuspend(dev);
 706	pm_runtime_put_noidle(dev);
 707	pm_runtime_set_suspended(dev);
 708
 709	return 0;
 710
 711enable_device:
 712	reset_control_deassert(oproc->reset);
 713out:
 714	/* schedule the next auto-suspend */
 715	pm_runtime_put_autosuspend(dev);
 716	return ret;
 717}
 718
 719/**
 720 * omap_rproc_da_to_va() - internal memory translation helper
 721 * @rproc: remote processor to apply the address translation for
 722 * @da: device address to translate
 723 * @len: length of the memory buffer
 724 * @is_iomem: pointer filled in to indicate if @da is iomapped memory
 725 *
 726 * Custom function implementing the rproc .da_to_va ops to provide address
 727 * translation (device address to kernel virtual address) for internal RAMs
 728 * present in a DSP or IPU device). The translated addresses can be used
 729 * either by the remoteproc core for loading, or by any rpmsg bus drivers.
 730 *
 731 * Return: translated virtual address in kernel memory space on success,
 732 *         or NULL on failure.
 733 */
 734static void *omap_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 735{
 736	struct omap_rproc *oproc = rproc->priv;
 737	int i;
 738	u32 offset;
 739
 740	if (len <= 0)
 741		return NULL;
 742
 743	if (!oproc->num_mems)
 744		return NULL;
 745
 746	for (i = 0; i < oproc->num_mems; i++) {
 747		if (da >= oproc->mem[i].dev_addr && da + len <=
 748		    oproc->mem[i].dev_addr + oproc->mem[i].size) {
 749			offset = da - oproc->mem[i].dev_addr;
 750			/* __force to make sparse happy with type conversion */
 751			return (__force void *)(oproc->mem[i].cpu_addr +
 752						offset);
 753		}
 754	}
 755
 756	return NULL;
 757}
 758
 759static const struct rproc_ops omap_rproc_ops = {
 760	.start		= omap_rproc_start,
 761	.stop		= omap_rproc_stop,
 762	.kick		= omap_rproc_kick,
 763	.da_to_va	= omap_rproc_da_to_va,
 764};
 765
 766#ifdef CONFIG_PM
 767static bool _is_rproc_in_standby(struct omap_rproc *oproc)
 768{
 769	return ti_clk_is_in_standby(oproc->fck);
 770}
 771
 772/* 1 sec is long enough time to let the remoteproc side suspend the device */
 773#define DEF_SUSPEND_TIMEOUT 1000
 774static int _omap_rproc_suspend(struct rproc *rproc, bool auto_suspend)
 775{
 776	struct device *dev = rproc->dev.parent;
 777	struct omap_rproc *oproc = rproc->priv;
 778	unsigned long to = msecs_to_jiffies(DEF_SUSPEND_TIMEOUT);
 779	unsigned long ta = jiffies + to;
 780	u32 suspend_msg = auto_suspend ?
 781				RP_MBOX_SUSPEND_AUTO : RP_MBOX_SUSPEND_SYSTEM;
 782	int ret;
 783
 784	reinit_completion(&oproc->pm_comp);
 785	oproc->suspend_acked = false;
 786	ret = mbox_send_message(oproc->mbox, (void *)suspend_msg);
 787	if (ret < 0) {
 788		dev_err(dev, "PM mbox_send_message failed: %d\n", ret);
 789		return ret;
 790	}
 791
 792	ret = wait_for_completion_timeout(&oproc->pm_comp, to);
 793	if (!oproc->suspend_acked)
 794		return -EBUSY;
 795
 796	/*
 797	 * The remoteproc side is returning the ACK message before saving the
 798	 * context, because the context saving is performed within a SYS/BIOS
 799	 * function, and it cannot have any inter-dependencies against the IPC
 800	 * layer. Also, as the SYS/BIOS needs to preserve properly the processor
 801	 * register set, sending this ACK or signalling the completion of the
 802	 * context save through a shared memory variable can never be the
 803	 * absolute last thing to be executed on the remoteproc side, and the
 804	 * MPU cannot use the ACK message as a sync point to put the remoteproc
 805	 * into reset. The only way to ensure that the remote processor has
 806	 * completed saving the context is to check that the module has reached
 807	 * STANDBY state (after saving the context, the SYS/BIOS executes the
 808	 * appropriate target-specific WFI instruction causing the module to
 809	 * enter STANDBY).
 810	 */
 811	while (!_is_rproc_in_standby(oproc)) {
 812		if (time_after(jiffies, ta))
 813			return -ETIME;
 814		schedule();
 815	}
 816
 817	ret = reset_control_assert(oproc->reset);
 818	if (ret) {
 819		dev_err(dev, "reset assert during suspend failed %d\n", ret);
 820		return ret;
 821	}
 822
 823	ret = omap_rproc_disable_timers(rproc, false);
 824	if (ret) {
 825		dev_err(dev, "disabling timers during suspend failed %d\n",
 826			ret);
 827		goto enable_device;
 828	}
 829
 830	/*
 831	 * IOMMUs would have to be disabled specifically for runtime suspend.
 832	 * They are handled automatically through System PM callbacks for
 833	 * regular system suspend
 834	 */
 835	if (auto_suspend) {
 836		ret = omap_iommu_domain_deactivate(rproc->domain);
 837		if (ret) {
 838			dev_err(dev, "iommu domain deactivate failed %d\n",
 839				ret);
 840			goto enable_timers;
 841		}
 842	}
 843
 844	return 0;
 845
 846enable_timers:
 847	/* ignore errors on re-enabling code */
 848	omap_rproc_enable_timers(rproc, false);
 849enable_device:
 850	reset_control_deassert(oproc->reset);
 851	return ret;
 852}
 853
 854static int _omap_rproc_resume(struct rproc *rproc, bool auto_suspend)
 855{
 856	struct device *dev = rproc->dev.parent;
 857	struct omap_rproc *oproc = rproc->priv;
 858	int ret;
 859
 860	/*
 861	 * IOMMUs would have to be enabled specifically for runtime resume.
 862	 * They would have been already enabled automatically through System
 863	 * PM callbacks for regular system resume
 864	 */
 865	if (auto_suspend) {
 866		ret = omap_iommu_domain_activate(rproc->domain);
 867		if (ret) {
 868			dev_err(dev, "omap_iommu activate failed %d\n", ret);
 869			goto out;
 870		}
 871	}
 872
 873	/* boot address could be lost after suspend, so restore it */
 874	if (oproc->boot_data) {
 875		ret = omap_rproc_write_dsp_boot_addr(rproc);
 876		if (ret) {
 877			dev_err(dev, "boot address restore failed %d\n", ret);
 878			goto suspend_iommu;
 879		}
 880	}
 881
 882	ret = omap_rproc_enable_timers(rproc, false);
 883	if (ret) {
 884		dev_err(dev, "enabling timers during resume failed %d\n", ret);
 885		goto suspend_iommu;
 886	}
 887
 888	ret = reset_control_deassert(oproc->reset);
 889	if (ret) {
 890		dev_err(dev, "reset deassert during resume failed %d\n", ret);
 891		goto disable_timers;
 892	}
 893
 894	return 0;
 895
 896disable_timers:
 897	omap_rproc_disable_timers(rproc, false);
 898suspend_iommu:
 899	if (auto_suspend)
 900		omap_iommu_domain_deactivate(rproc->domain);
 901out:
 902	return ret;
 903}
 904
 905static int __maybe_unused omap_rproc_suspend(struct device *dev)
 906{
 907	struct rproc *rproc = dev_get_drvdata(dev);
 908	struct omap_rproc *oproc = rproc->priv;
 909	int ret = 0;
 910
 911	mutex_lock(&rproc->lock);
 912	if (rproc->state == RPROC_OFFLINE)
 913		goto out;
 914
 915	if (rproc->state == RPROC_SUSPENDED)
 916		goto out;
 917
 918	if (rproc->state != RPROC_RUNNING) {
 919		ret = -EBUSY;
 920		goto out;
 921	}
 922
 923	ret = _omap_rproc_suspend(rproc, false);
 924	if (ret) {
 925		dev_err(dev, "suspend failed %d\n", ret);
 926		goto out;
 927	}
 928
 929	/*
 930	 * remoteproc is running at the time of system suspend, so remember
 931	 * it so as to wake it up during system resume
 932	 */
 933	oproc->need_resume = true;
 934	rproc->state = RPROC_SUSPENDED;
 935
 936out:
 937	mutex_unlock(&rproc->lock);
 938	return ret;
 939}
 940
 941static int __maybe_unused omap_rproc_resume(struct device *dev)
 942{
 943	struct rproc *rproc = dev_get_drvdata(dev);
 944	struct omap_rproc *oproc = rproc->priv;
 945	int ret = 0;
 946
 947	mutex_lock(&rproc->lock);
 948	if (rproc->state == RPROC_OFFLINE)
 949		goto out;
 950
 951	if (rproc->state != RPROC_SUSPENDED) {
 952		ret = -EBUSY;
 953		goto out;
 954	}
 955
 956	/*
 957	 * remoteproc was auto-suspended at the time of system suspend,
 958	 * so no need to wake-up the processor (leave it in suspended
 959	 * state, will be woken up during a subsequent runtime_resume)
 960	 */
 961	if (!oproc->need_resume)
 962		goto out;
 963
 964	ret = _omap_rproc_resume(rproc, false);
 965	if (ret) {
 966		dev_err(dev, "resume failed %d\n", ret);
 967		goto out;
 968	}
 969
 970	oproc->need_resume = false;
 971	rproc->state = RPROC_RUNNING;
 972
 973	pm_runtime_mark_last_busy(dev);
 974out:
 975	mutex_unlock(&rproc->lock);
 976	return ret;
 977}
 978
 979static int omap_rproc_runtime_suspend(struct device *dev)
 980{
 981	struct rproc *rproc = dev_get_drvdata(dev);
 982	struct omap_rproc *oproc = rproc->priv;
 983	int ret;
 984
 985	mutex_lock(&rproc->lock);
 986	if (rproc->state == RPROC_CRASHED) {
 987		dev_dbg(dev, "rproc cannot be runtime suspended when crashed!\n");
 988		ret = -EBUSY;
 989		goto out;
 990	}
 991
 992	if (WARN_ON(rproc->state != RPROC_RUNNING)) {
 993		dev_err(dev, "rproc cannot be runtime suspended when not running!\n");
 994		ret = -EBUSY;
 995		goto out;
 996	}
 997
 998	/*
 999	 * do not even attempt suspend if the remote processor is not
1000	 * idled for runtime auto-suspend
1001	 */
1002	if (!_is_rproc_in_standby(oproc)) {
1003		ret = -EBUSY;
1004		goto abort;
1005	}
1006
1007	ret = _omap_rproc_suspend(rproc, true);
1008	if (ret)
1009		goto abort;
1010
1011	rproc->state = RPROC_SUSPENDED;
1012	mutex_unlock(&rproc->lock);
1013	return 0;
1014
1015abort:
1016	pm_runtime_mark_last_busy(dev);
1017out:
1018	mutex_unlock(&rproc->lock);
1019	return ret;
1020}
1021
1022static int omap_rproc_runtime_resume(struct device *dev)
1023{
1024	struct rproc *rproc = dev_get_drvdata(dev);
1025	int ret;
1026
1027	mutex_lock(&rproc->lock);
1028	if (WARN_ON(rproc->state != RPROC_SUSPENDED)) {
1029		dev_err(dev, "rproc cannot be runtime resumed if not suspended! state=%d\n",
1030			rproc->state);
1031		ret = -EBUSY;
1032		goto out;
1033	}
1034
1035	ret = _omap_rproc_resume(rproc, true);
1036	if (ret) {
1037		dev_err(dev, "runtime resume failed %d\n", ret);
1038		goto out;
1039	}
1040
1041	rproc->state = RPROC_RUNNING;
1042out:
1043	mutex_unlock(&rproc->lock);
1044	return ret;
1045}
1046#endif /* CONFIG_PM */
1047
1048static const struct omap_rproc_mem_data ipu_mems[] = {
1049	{ .name = "l2ram", .dev_addr = 0x20000000 },
1050	{ },
1051};
1052
1053static const struct omap_rproc_mem_data dra7_dsp_mems[] = {
1054	{ .name = "l2ram", .dev_addr = 0x800000 },
1055	{ .name = "l1pram", .dev_addr = 0xe00000 },
1056	{ .name = "l1dram", .dev_addr = 0xf00000 },
1057	{ },
1058};
1059
1060static const struct omap_rproc_dev_data omap4_dsp_dev_data = {
1061	.device_name	= "dsp",
1062};
1063
1064static const struct omap_rproc_dev_data omap4_ipu_dev_data = {
1065	.device_name	= "ipu",
1066	.mems		= ipu_mems,
1067};
1068
1069static const struct omap_rproc_dev_data omap5_dsp_dev_data = {
1070	.device_name	= "dsp",
1071};
1072
1073static const struct omap_rproc_dev_data omap5_ipu_dev_data = {
1074	.device_name	= "ipu",
1075	.mems		= ipu_mems,
1076};
1077
1078static const struct omap_rproc_dev_data dra7_dsp_dev_data = {
1079	.device_name	= "dsp",
1080	.mems		= dra7_dsp_mems,
1081};
1082
1083static const struct omap_rproc_dev_data dra7_ipu_dev_data = {
1084	.device_name	= "ipu",
1085	.mems		= ipu_mems,
1086};
1087
1088static const struct of_device_id omap_rproc_of_match[] = {
1089	{
1090		.compatible     = "ti,omap4-dsp",
1091		.data           = &omap4_dsp_dev_data,
1092	},
1093	{
1094		.compatible     = "ti,omap4-ipu",
1095		.data           = &omap4_ipu_dev_data,
1096	},
1097	{
1098		.compatible     = "ti,omap5-dsp",
1099		.data           = &omap5_dsp_dev_data,
1100	},
1101	{
1102		.compatible     = "ti,omap5-ipu",
1103		.data           = &omap5_ipu_dev_data,
1104	},
1105	{
1106		.compatible     = "ti,dra7-dsp",
1107		.data           = &dra7_dsp_dev_data,
1108	},
1109	{
1110		.compatible     = "ti,dra7-ipu",
1111		.data           = &dra7_ipu_dev_data,
1112	},
1113	{
1114		/* end */
1115	},
1116};
1117MODULE_DEVICE_TABLE(of, omap_rproc_of_match);
1118
1119static const char *omap_rproc_get_firmware(struct platform_device *pdev)
1120{
1121	const char *fw_name;
1122	int ret;
1123
1124	ret = of_property_read_string(pdev->dev.of_node, "firmware-name",
1125				      &fw_name);
1126	if (ret)
1127		return ERR_PTR(ret);
1128
1129	return fw_name;
1130}
1131
1132static int omap_rproc_get_boot_data(struct platform_device *pdev,
1133				    struct rproc *rproc)
1134{
1135	struct device_node *np = pdev->dev.of_node;
1136	struct omap_rproc *oproc = rproc->priv;
1137	const struct omap_rproc_dev_data *data;
1138
1139	data = of_device_get_match_data(&pdev->dev);
1140	if (!data)
1141		return -ENODEV;
1142
1143	if (!of_property_read_bool(np, "ti,bootreg"))
1144		return 0;
1145
1146	oproc->boot_data = devm_kzalloc(&pdev->dev, sizeof(*oproc->boot_data),
1147					GFP_KERNEL);
1148	if (!oproc->boot_data)
1149		return -ENOMEM;
1150
1151	oproc->boot_data->syscon =
1152			syscon_regmap_lookup_by_phandle(np, "ti,bootreg");
1153	if (IS_ERR(oproc->boot_data->syscon))
1154		return PTR_ERR(oproc->boot_data->syscon);
1155
1156	if (of_property_read_u32_index(np, "ti,bootreg", 1,
1157				       &oproc->boot_data->boot_reg)) {
1158		dev_err(&pdev->dev, "couldn't get the boot register\n");
1159		return -EINVAL;
1160	}
1161
1162	of_property_read_u32_index(np, "ti,bootreg", 2,
1163				   &oproc->boot_data->boot_reg_shift);
1164
1165	return 0;
1166}
1167
1168static int omap_rproc_of_get_internal_memories(struct platform_device *pdev,
1169					       struct rproc *rproc)
1170{
1171	struct omap_rproc *oproc = rproc->priv;
1172	struct device *dev = &pdev->dev;
1173	const struct omap_rproc_dev_data *data;
1174	struct resource *res;
1175	int num_mems;
1176	int i;
1177
1178	data = of_device_get_match_data(dev);
1179	if (!data)
1180		return -ENODEV;
1181
1182	if (!data->mems)
1183		return 0;
1184
1185	num_mems = of_property_count_elems_of_size(dev->of_node, "reg",
1186						   sizeof(u32)) / 2;
1187
1188	oproc->mem = devm_kcalloc(dev, num_mems, sizeof(*oproc->mem),
1189				  GFP_KERNEL);
1190	if (!oproc->mem)
1191		return -ENOMEM;
1192
1193	for (i = 0; data->mems[i].name; i++) {
1194		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
1195						   data->mems[i].name);
1196		if (!res) {
1197			dev_err(dev, "no memory defined for %s\n",
1198				data->mems[i].name);
1199			return -ENOMEM;
1200		}
1201		oproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
1202		if (IS_ERR(oproc->mem[i].cpu_addr)) {
1203			dev_err(dev, "failed to parse and map %s memory\n",
1204				data->mems[i].name);
1205			return PTR_ERR(oproc->mem[i].cpu_addr);
1206		}
1207		oproc->mem[i].bus_addr = res->start;
1208		oproc->mem[i].dev_addr = data->mems[i].dev_addr;
1209		oproc->mem[i].size = resource_size(res);
1210
1211		dev_dbg(dev, "memory %8s: bus addr %pa size 0x%x va %p da 0x%x\n",
1212			data->mems[i].name, &oproc->mem[i].bus_addr,
1213			oproc->mem[i].size, oproc->mem[i].cpu_addr,
1214			oproc->mem[i].dev_addr);
1215	}
1216	oproc->num_mems = num_mems;
1217
1218	return 0;
1219}
1220
1221#ifdef CONFIG_OMAP_REMOTEPROC_WATCHDOG
1222static int omap_rproc_count_wdog_timers(struct device *dev)
1223{
1224	struct device_node *np = dev->of_node;
1225	int ret;
1226
1227	ret = of_count_phandle_with_args(np, "ti,watchdog-timers", NULL);
1228	if (ret <= 0) {
1229		dev_dbg(dev, "device does not have watchdog timers, status = %d\n",
1230			ret);
1231		ret = 0;
1232	}
1233
1234	return ret;
1235}
1236#else
1237static int omap_rproc_count_wdog_timers(struct device *dev)
1238{
1239	return 0;
1240}
1241#endif
1242
1243static int omap_rproc_of_get_timers(struct platform_device *pdev,
1244				    struct rproc *rproc)
1245{
1246	struct device_node *np = pdev->dev.of_node;
1247	struct omap_rproc *oproc = rproc->priv;
1248	struct device *dev = &pdev->dev;
1249	int num_timers;
1250
1251	/*
1252	 * Timer nodes are directly used in client nodes as phandles, so
1253	 * retrieve the count using appropriate size
1254	 */
1255	oproc->num_timers = of_count_phandle_with_args(np, "ti,timers", NULL);
1256	if (oproc->num_timers <= 0) {
1257		dev_dbg(dev, "device does not have timers, status = %d\n",
1258			oproc->num_timers);
1259		oproc->num_timers = 0;
1260	}
1261
1262	oproc->num_wd_timers = omap_rproc_count_wdog_timers(dev);
1263
1264	num_timers = oproc->num_timers + oproc->num_wd_timers;
1265	if (num_timers) {
1266		oproc->timers = devm_kcalloc(dev, num_timers,
1267					     sizeof(*oproc->timers),
1268					     GFP_KERNEL);
1269		if (!oproc->timers)
1270			return -ENOMEM;
1271
1272		dev_dbg(dev, "device has %d tick timers and %d watchdog timers\n",
1273			oproc->num_timers, oproc->num_wd_timers);
1274	}
1275
1276	return 0;
1277}
1278
1279static void omap_rproc_mem_release(void *data)
1280{
1281	struct device *dev = data;
1282
1283	of_reserved_mem_device_release(dev);
1284}
1285
1286static int omap_rproc_probe(struct platform_device *pdev)
1287{
1288	struct device_node *np = pdev->dev.of_node;
1289	struct omap_rproc *oproc;
1290	struct rproc *rproc;
1291	const char *firmware;
1292	int ret;
1293	struct reset_control *reset;
1294
1295	if (!np) {
1296		dev_err(&pdev->dev, "only DT-based devices are supported\n");
1297		return -ENODEV;
1298	}
1299
1300	reset = devm_reset_control_array_get_exclusive(&pdev->dev);
1301	if (IS_ERR(reset))
1302		return PTR_ERR(reset);
1303
1304	firmware = omap_rproc_get_firmware(pdev);
1305	if (IS_ERR(firmware))
1306		return PTR_ERR(firmware);
1307
1308	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1309	if (ret) {
1310		dev_err(&pdev->dev, "dma_set_coherent_mask: %d\n", ret);
1311		return ret;
1312	}
1313
1314	rproc = devm_rproc_alloc(&pdev->dev, dev_name(&pdev->dev), &omap_rproc_ops,
1315				 firmware, sizeof(*oproc));
1316	if (!rproc)
1317		return -ENOMEM;
1318
1319	oproc = rproc->priv;
1320	oproc->rproc = rproc;
1321	oproc->reset = reset;
1322	/* All existing OMAP IPU and DSP processors have an MMU */
1323	rproc->has_iommu = true;
1324
1325#ifdef CONFIG_ARM_DMA_USE_IOMMU
1326	/*
1327	 * Throw away the ARM DMA mapping that we'll never use, so it doesn't
1328	 * interfere with the core rproc->domain and we get the right DMA ops.
1329	 */
1330	if (pdev->dev.archdata.mapping) {
1331		struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(&pdev->dev);
1332
1333		arm_iommu_detach_device(&pdev->dev);
1334		arm_iommu_release_mapping(mapping);
1335	}
1336#endif
1337
1338	ret = omap_rproc_of_get_internal_memories(pdev, rproc);
1339	if (ret)
1340		return ret;
1341
1342	ret = omap_rproc_get_boot_data(pdev, rproc);
1343	if (ret)
1344		return ret;
1345
1346	ret = omap_rproc_of_get_timers(pdev, rproc);
1347	if (ret)
1348		return ret;
1349
1350	init_completion(&oproc->pm_comp);
1351	oproc->autosuspend_delay = DEFAULT_AUTOSUSPEND_DELAY;
1352
1353	of_property_read_u32(pdev->dev.of_node, "ti,autosuspend-delay-ms",
1354			     &oproc->autosuspend_delay);
1355
1356	pm_runtime_set_autosuspend_delay(&pdev->dev, oproc->autosuspend_delay);
1357
1358	oproc->fck = devm_clk_get(&pdev->dev, 0);
1359	if (IS_ERR(oproc->fck))
1360		return PTR_ERR(oproc->fck);
1361
1362	ret = of_reserved_mem_device_init(&pdev->dev);
1363	if (ret) {
1364		dev_warn(&pdev->dev, "device does not have specific CMA pool.\n");
1365		dev_warn(&pdev->dev, "Typically this should be provided,\n");
1366		dev_warn(&pdev->dev, "only omit if you know what you are doing.\n");
1367	}
1368	ret = devm_add_action_or_reset(&pdev->dev, omap_rproc_mem_release, &pdev->dev);
1369	if (ret)
1370		return ret;
1371
1372	platform_set_drvdata(pdev, rproc);
1373
1374	ret = devm_rproc_add(&pdev->dev, rproc);
1375	if (ret)
1376		return ret;
1377
1378	return 0;
1379}
1380
1381static const struct dev_pm_ops omap_rproc_pm_ops = {
1382	SET_SYSTEM_SLEEP_PM_OPS(omap_rproc_suspend, omap_rproc_resume)
1383	SET_RUNTIME_PM_OPS(omap_rproc_runtime_suspend,
1384			   omap_rproc_runtime_resume, NULL)
1385};
1386
1387static struct platform_driver omap_rproc_driver = {
1388	.probe = omap_rproc_probe,
1389	.driver = {
1390		.name = "omap-rproc",
1391		.pm = &omap_rproc_pm_ops,
1392		.of_match_table = omap_rproc_of_match,
1393	},
1394};
1395
1396module_platform_driver(omap_rproc_driver);
1397
1398MODULE_LICENSE("GPL v2");
1399MODULE_DESCRIPTION("OMAP Remote Processor control driver");