2 * omap_device implementation
4 * Copyright (C) 2009-2010 Nokia Corporation
5 * Paul Walmsley, Kevin Hilman
7 * Developed in collaboration with (alphabetical order): Benoit
8 * Cousson, Thara Gopinath, Tony Lindgren, Rajendra Nayak, Vikram
9 * Pandita, Sakari Poussa, Anand Sawant, Santosh Shilimkar, Richard
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
16 * This code provides a consistent interface for OMAP device drivers
17 * to control power management and interconnect properties of their
20 * In the medium- to long-term, this code should be implemented as a
21 * proper omap_bus/omap_device in Linux, no more platform_data func
28 #include <linux/kernel.h>
29 #include <linux/platform_device.h>
30 #include <linux/slab.h>
31 #include <linux/err.h>
33 #include <linux/clk.h>
34 #include <linux/clkdev.h>
35 #include <linux/pm_domain.h>
36 #include <linux/pm_runtime.h>
38 #include <linux/notifier.h>
42 #include "omap_device.h"
43 #include "omap_hwmod.h"
45 /* Private functions */
47 static void _add_clkdev(struct omap_device *od, const char *clk_alias,
53 if (!clk_alias || !clk_name)
56 dev_dbg(&od->pdev->dev, "Creating %s -> %s\n", clk_alias, clk_name);
58 r = clk_get_sys(dev_name(&od->pdev->dev), clk_alias);
60 dev_dbg(&od->pdev->dev,
61 "alias %s already exists\n", clk_alias);
66 r = clk_get_sys(NULL, clk_name);
68 if (IS_ERR(r) && of_have_populated_dt()) {
69 struct of_phandle_args clkspec;
71 clkspec.np = of_find_node_by_name(NULL, clk_name);
73 r = of_clk_get_from_provider(&clkspec);
75 rc = clk_register_clkdev(r, clk_alias,
76 dev_name(&od->pdev->dev));
78 rc = clk_add_alias(clk_alias, dev_name(&od->pdev->dev),
83 if (rc == -ENODEV || rc == -ENOMEM)
84 dev_err(&od->pdev->dev,
85 "clkdev_alloc for %s failed\n", clk_alias);
87 dev_err(&od->pdev->dev,
88 "clk_get for %s failed\n", clk_name);
93 * _add_hwmod_clocks_clkdev - Add clkdev entry for hwmod optional clocks
95 * @od: struct omap_device *od
96 * @oh: struct omap_hwmod *oh
98 * For the main clock and every optional clock present per hwmod per
99 * omap_device, this function adds an entry in the clkdev table of the
100 * form <dev-id=dev_name, con-id=role> if it does not exist already.
102 * The function is called from inside omap_device_build_ss(), after
103 * omap_device_register.
105 * This allows drivers to get a pointer to its optional clocks based on its role
106 * by calling clk_get(<dev*>, <role>).
107 * In the case of the main clock, a "fck" alias is used.
111 static void _add_hwmod_clocks_clkdev(struct omap_device *od,
112 struct omap_hwmod *oh)
116 _add_clkdev(od, "fck", oh->main_clk);
118 for (i = 0; i < oh->opt_clks_cnt; i++)
119 _add_clkdev(od, oh->opt_clks[i].role, oh->opt_clks[i].clk);
124 * omap_device_build_from_dt - build an omap_device with multiple hwmods
125 * @pdev_name: name of the platform_device driver to use
126 * @pdev_id: this platform_device's connection ID
127 * @oh: ptr to the single omap_hwmod that backs this omap_device
128 * @pdata: platform_data ptr to associate with the platform_device
129 * @pdata_len: amount of memory pointed to by @pdata
131 * Function for building an omap_device already registered from device-tree
133 * Returns 0 or PTR_ERR() on error.
135 static int omap_device_build_from_dt(struct platform_device *pdev)
137 struct omap_hwmod **hwmods;
138 struct omap_device *od;
139 struct omap_hwmod *oh;
140 struct device_node *node = pdev->dev.of_node;
142 int oh_cnt, i, ret = 0;
143 bool device_active = false;
145 oh_cnt = of_property_count_strings(node, "ti,hwmods");
147 dev_dbg(&pdev->dev, "No 'hwmods' to build omap_device\n");
151 hwmods = kzalloc(sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL);
157 for (i = 0; i < oh_cnt; i++) {
158 of_property_read_string_index(node, "ti,hwmods", i, &oh_name);
159 oh = omap_hwmod_lookup(oh_name);
161 dev_err(&pdev->dev, "Cannot lookup hwmod '%s'\n",
167 if (oh->flags & HWMOD_INIT_NO_IDLE)
168 device_active = true;
171 od = omap_device_alloc(pdev, hwmods, oh_cnt);
173 dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n",
179 /* Fix up missing resource names */
180 for (i = 0; i < pdev->num_resources; i++) {
181 struct resource *r = &pdev->resource[i];
184 r->name = dev_name(&pdev->dev);
187 dev_pm_domain_set(&pdev->dev, &omap_device_pm_domain);
190 omap_device_enable(pdev);
191 pm_runtime_set_active(&pdev->dev);
197 /* if data/we are at fault.. load up a fail handler */
199 dev_pm_domain_set(&pdev->dev, &omap_device_fail_pm_domain);
204 static int _omap_device_notifier_call(struct notifier_block *nb,
205 unsigned long event, void *dev)
207 struct platform_device *pdev = to_platform_device(dev);
208 struct omap_device *od;
212 case BUS_NOTIFY_REMOVED_DEVICE:
213 if (pdev->archdata.od)
214 omap_device_delete(pdev->archdata.od);
216 case BUS_NOTIFY_UNBOUND_DRIVER:
217 od = to_omap_device(pdev);
218 if (od && (od->_state == OMAP_DEVICE_STATE_ENABLED)) {
219 dev_info(dev, "enabled after unload, idling\n");
220 err = omap_device_idle(pdev);
222 dev_err(dev, "failed to idle\n");
225 case BUS_NOTIFY_BIND_DRIVER:
226 od = to_omap_device(pdev);
227 if (od && (od->_state == OMAP_DEVICE_STATE_ENABLED) &&
228 pm_runtime_status_suspended(dev)) {
229 od->_driver_status = BUS_NOTIFY_BIND_DRIVER;
230 pm_runtime_set_active(dev);
233 case BUS_NOTIFY_ADD_DEVICE:
234 if (pdev->dev.of_node)
235 omap_device_build_from_dt(pdev);
236 omap_auxdata_legacy_init(dev);
239 od = to_omap_device(pdev);
241 od->_driver_status = event;
248 * _omap_device_enable_hwmods - call omap_hwmod_enable() on all hwmods
249 * @od: struct omap_device *od
251 * Enable all underlying hwmods. Returns 0.
253 static int _omap_device_enable_hwmods(struct omap_device *od)
258 for (i = 0; i < od->hwmods_cnt; i++)
259 ret |= omap_hwmod_enable(od->hwmods[i]);
265 * _omap_device_idle_hwmods - call omap_hwmod_idle() on all hwmods
266 * @od: struct omap_device *od
268 * Idle all underlying hwmods. Returns 0.
270 static int _omap_device_idle_hwmods(struct omap_device *od)
275 for (i = 0; i < od->hwmods_cnt; i++)
276 ret |= omap_hwmod_idle(od->hwmods[i]);
281 /* Public functions for use by core code */
284 * omap_device_get_context_loss_count - get lost context count
285 * @od: struct omap_device *
287 * Using the primary hwmod, query the context loss count for this
290 * Callers should consider context for this device lost any time this
291 * function returns a value different than the value the caller got
292 * the last time it called this function.
294 * If any hwmods exist for the omap_device associated with @pdev,
295 * return the context loss counter for that hwmod, otherwise return
298 int omap_device_get_context_loss_count(struct platform_device *pdev)
300 struct omap_device *od;
303 od = to_omap_device(pdev);
306 ret = omap_hwmod_get_context_loss_count(od->hwmods[0]);
312 * omap_device_count_resources - count number of struct resource entries needed
313 * @od: struct omap_device *
314 * @flags: Type of resources to include when counting (IRQ/DMA/MEM)
316 * Count the number of struct resource entries needed for this
317 * omap_device @od. Used by omap_device_build_ss() to determine how
318 * much memory to allocate before calling
319 * omap_device_fill_resources(). Returns the count.
321 static int omap_device_count_resources(struct omap_device *od,
327 for (i = 0; i < od->hwmods_cnt; i++)
328 c += omap_hwmod_count_resources(od->hwmods[i], flags);
330 pr_debug("omap_device: %s: counted %d total resources across %d hwmods\n",
331 od->pdev->name, c, od->hwmods_cnt);
337 * omap_device_fill_resources - fill in array of struct resource
338 * @od: struct omap_device *
339 * @res: pointer to an array of struct resource to be filled in
341 * Populate one or more empty struct resource pointed to by @res with
342 * the resource data for this omap_device @od. Used by
343 * omap_device_build_ss() after calling omap_device_count_resources().
344 * Ideally this function would not be needed at all. If omap_device
345 * replaces platform_device, then we can specify our own
346 * get_resource()/ get_irq()/etc functions that use the underlying
347 * omap_hwmod information. Or if platform_device is extended to use
348 * subarchitecture-specific function pointers, the various
349 * platform_device functions can simply call omap_device internal
350 * functions to get device resources. Hacking around the existing
351 * platform_device code wastes memory. Returns 0.
353 static int omap_device_fill_resources(struct omap_device *od,
354 struct resource *res)
358 for (i = 0; i < od->hwmods_cnt; i++) {
359 r = omap_hwmod_fill_resources(od->hwmods[i], res);
367 * _od_fill_dma_resources - fill in array of struct resource with dma resources
368 * @od: struct omap_device *
369 * @res: pointer to an array of struct resource to be filled in
371 * Populate one or more empty struct resource pointed to by @res with
372 * the dma resource data for this omap_device @od. Used by
373 * omap_device_alloc() after calling omap_device_count_resources().
375 * Ideally this function would not be needed at all. If we have
376 * mechanism to get dma resources from DT.
380 static int _od_fill_dma_resources(struct omap_device *od,
381 struct resource *res)
385 for (i = 0; i < od->hwmods_cnt; i++) {
386 r = omap_hwmod_fill_dma_resources(od->hwmods[i], res);
394 * omap_device_alloc - allocate an omap_device
395 * @pdev: platform_device that will be included in this omap_device
396 * @oh: ptr to the single omap_hwmod that backs this omap_device
397 * @pdata: platform_data ptr to associate with the platform_device
398 * @pdata_len: amount of memory pointed to by @pdata
400 * Convenience function for allocating an omap_device structure and filling
401 * hwmods, and resources.
403 * Returns an struct omap_device pointer or ERR_PTR() on error;
405 struct omap_device *omap_device_alloc(struct platform_device *pdev,
406 struct omap_hwmod **ohs, int oh_cnt)
409 struct omap_device *od;
410 struct resource *res = NULL;
412 struct omap_hwmod **hwmods;
414 od = kzalloc(sizeof(struct omap_device), GFP_KERNEL);
419 od->hwmods_cnt = oh_cnt;
421 hwmods = kmemdup(ohs, sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL);
430 * Here, pdev->num_resources = 0, and we should get all the
431 * resources from hwmod.
434 * OF framework will construct the resource structure (currently
435 * does for MEM & IRQ resource) and we should respect/use these
436 * resources, killing hwmod dependency.
437 * If pdev->num_resources > 0, we assume that MEM & IRQ resources
438 * have been allocated by OF layer already (through DTB).
439 * As preparation for the future we examine the OF provided resources
440 * to see if we have DMA resources provided already. In this case
441 * there is no need to update the resources for the device, we use the
444 * TODO: Once DMA resource is available from OF layer, we should
445 * kill filling any resources from hwmod.
447 if (!pdev->num_resources) {
448 /* Count all resources for the device */
449 res_count = omap_device_count_resources(od, IORESOURCE_IRQ |
453 /* Take a look if we already have DMA resource via DT */
454 for (i = 0; i < pdev->num_resources; i++) {
455 struct resource *r = &pdev->resource[i];
457 /* We have it, no need to touch the resources */
458 if (r->flags == IORESOURCE_DMA)
459 goto have_everything;
461 /* Count only DMA resources for the device */
462 res_count = omap_device_count_resources(od, IORESOURCE_DMA);
463 /* The device has no DMA resource, no need for update */
465 goto have_everything;
467 res_count += pdev->num_resources;
470 /* Allocate resources memory to account for new resources */
471 res = kzalloc(sizeof(struct resource) * res_count, GFP_KERNEL);
475 if (!pdev->num_resources) {
476 dev_dbg(&pdev->dev, "%s: using %d resources from hwmod\n",
477 __func__, res_count);
478 omap_device_fill_resources(od, res);
481 "%s: appending %d DMA resources from hwmod\n",
482 __func__, res_count - pdev->num_resources);
483 memcpy(res, pdev->resource,
484 sizeof(struct resource) * pdev->num_resources);
485 _od_fill_dma_resources(od, &res[pdev->num_resources]);
488 ret = platform_device_add_resources(pdev, res, res_count);
495 pdev->archdata.od = od;
497 for (i = 0; i < oh_cnt; i++) {
499 _add_hwmod_clocks_clkdev(od, hwmods[i]);
509 dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret);
514 void omap_device_delete(struct omap_device *od)
519 od->pdev->archdata.od = NULL;
525 * omap_device_build - build and register an omap_device with one omap_hwmod
526 * @pdev_name: name of the platform_device driver to use
527 * @pdev_id: this platform_device's connection ID
528 * @oh: ptr to the single omap_hwmod that backs this omap_device
529 * @pdata: platform_data ptr to associate with the platform_device
530 * @pdata_len: amount of memory pointed to by @pdata
532 * Convenience function for building and registering a single
533 * omap_device record, which in turn builds and registers a
534 * platform_device record. See omap_device_build_ss() for more
535 * information. Returns ERR_PTR(-EINVAL) if @oh is NULL; otherwise,
536 * passes along the return value of omap_device_build_ss().
538 struct platform_device __init *omap_device_build(const char *pdev_name,
540 struct omap_hwmod *oh,
541 void *pdata, int pdata_len)
543 struct omap_hwmod *ohs[] = { oh };
546 return ERR_PTR(-EINVAL);
548 return omap_device_build_ss(pdev_name, pdev_id, ohs, 1, pdata,
553 * omap_device_build_ss - build and register an omap_device with multiple hwmods
554 * @pdev_name: name of the platform_device driver to use
555 * @pdev_id: this platform_device's connection ID
556 * @oh: ptr to the single omap_hwmod that backs this omap_device
557 * @pdata: platform_data ptr to associate with the platform_device
558 * @pdata_len: amount of memory pointed to by @pdata
560 * Convenience function for building and registering an omap_device
561 * subsystem record. Subsystem records consist of multiple
562 * omap_hwmods. This function in turn builds and registers a
563 * platform_device record. Returns an ERR_PTR() on error, or passes
564 * along the return value of omap_device_register().
566 struct platform_device __init *omap_device_build_ss(const char *pdev_name,
568 struct omap_hwmod **ohs,
569 int oh_cnt, void *pdata,
573 struct platform_device *pdev;
574 struct omap_device *od;
576 if (!ohs || oh_cnt == 0 || !pdev_name)
577 return ERR_PTR(-EINVAL);
579 if (!pdata && pdata_len > 0)
580 return ERR_PTR(-EINVAL);
582 pdev = platform_device_alloc(pdev_name, pdev_id);
588 /* Set the dev_name early to allow dev_xxx in omap_device_alloc */
590 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
592 dev_set_name(&pdev->dev, "%s", pdev->name);
594 od = omap_device_alloc(pdev, ohs, oh_cnt);
598 ret = platform_device_add_data(pdev, pdata, pdata_len);
602 ret = omap_device_register(pdev);
609 omap_device_delete(od);
611 platform_device_put(pdev);
614 pr_err("omap_device: %s: build failed (%d)\n", pdev_name, ret);
620 static int _od_runtime_suspend(struct device *dev)
622 struct platform_device *pdev = to_platform_device(dev);
625 ret = pm_generic_runtime_suspend(dev);
629 return omap_device_idle(pdev);
632 static int _od_runtime_resume(struct device *dev)
634 struct platform_device *pdev = to_platform_device(dev);
637 ret = omap_device_enable(pdev);
639 dev_err(dev, "use pm_runtime_put_sync_suspend() in driver?\n");
643 return pm_generic_runtime_resume(dev);
646 static int _od_fail_runtime_suspend(struct device *dev)
648 dev_warn(dev, "%s: FIXME: missing hwmod/omap_dev info\n", __func__);
652 static int _od_fail_runtime_resume(struct device *dev)
654 dev_warn(dev, "%s: FIXME: missing hwmod/omap_dev info\n", __func__);
660 #ifdef CONFIG_SUSPEND
661 static int _od_suspend_noirq(struct device *dev)
663 struct platform_device *pdev = to_platform_device(dev);
664 struct omap_device *od = to_omap_device(pdev);
667 /* Don't attempt late suspend on a driver that is not bound */
668 if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER)
671 ret = pm_generic_suspend_noirq(dev);
673 if (!ret && !pm_runtime_status_suspended(dev)) {
674 if (pm_generic_runtime_suspend(dev) == 0) {
675 pm_runtime_set_suspended(dev);
676 omap_device_idle(pdev);
677 od->flags |= OMAP_DEVICE_SUSPENDED;
684 static int _od_resume_noirq(struct device *dev)
686 struct platform_device *pdev = to_platform_device(dev);
687 struct omap_device *od = to_omap_device(pdev);
689 if (od->flags & OMAP_DEVICE_SUSPENDED) {
690 od->flags &= ~OMAP_DEVICE_SUSPENDED;
691 omap_device_enable(pdev);
693 * XXX: we run before core runtime pm has resumed itself. At
694 * this point in time, we just restore the runtime pm state and
695 * considering symmetric operations in resume, we donot expect
696 * to fail. If we failed, something changed in core runtime_pm
697 * framework OR some device driver messed things up, hence, WARN
699 WARN(pm_runtime_set_active(dev),
700 "Could not set %s runtime state active\n", dev_name(dev));
701 pm_generic_runtime_resume(dev);
704 return pm_generic_resume_noirq(dev);
707 #define _od_suspend_noirq NULL
708 #define _od_resume_noirq NULL
711 struct dev_pm_domain omap_device_fail_pm_domain = {
713 SET_RUNTIME_PM_OPS(_od_fail_runtime_suspend,
714 _od_fail_runtime_resume, NULL)
718 struct dev_pm_domain omap_device_pm_domain = {
720 SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume,
722 USE_PLATFORM_PM_SLEEP_OPS
723 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(_od_suspend_noirq,
729 * omap_device_register - register an omap_device with one omap_hwmod
730 * @od: struct omap_device * to register
732 * Register the omap_device structure. This currently just calls
733 * platform_device_register() on the underlying platform_device.
734 * Returns the return value of platform_device_register().
736 int omap_device_register(struct platform_device *pdev)
738 pr_debug("omap_device: %s: registering\n", pdev->name);
740 dev_pm_domain_set(&pdev->dev, &omap_device_pm_domain);
741 return platform_device_add(pdev);
745 /* Public functions for use by device drivers through struct platform_data */
748 * omap_device_enable - fully activate an omap_device
749 * @od: struct omap_device * to activate
751 * Do whatever is necessary for the hwmods underlying omap_device @od
752 * to be accessible and ready to operate. This generally involves
753 * enabling clocks, setting SYSCONFIG registers; and in the future may
754 * involve remuxing pins. Device drivers should call this function
755 * indirectly via pm_runtime_get*(). Returns -EINVAL if called when
756 * the omap_device is already enabled, or passes along the return
757 * value of _omap_device_enable_hwmods().
759 int omap_device_enable(struct platform_device *pdev)
762 struct omap_device *od;
764 od = to_omap_device(pdev);
766 if (od->_state == OMAP_DEVICE_STATE_ENABLED) {
768 "omap_device: %s() called from invalid state %d\n",
769 __func__, od->_state);
773 ret = _omap_device_enable_hwmods(od);
776 od->_state = OMAP_DEVICE_STATE_ENABLED;
782 * omap_device_idle - idle an omap_device
783 * @od: struct omap_device * to idle
785 * Idle omap_device @od. Device drivers call this function indirectly
786 * via pm_runtime_put*(). Returns -EINVAL if the omap_device is not
787 * currently enabled, or passes along the return value of
788 * _omap_device_idle_hwmods().
790 int omap_device_idle(struct platform_device *pdev)
793 struct omap_device *od;
795 od = to_omap_device(pdev);
797 if (od->_state != OMAP_DEVICE_STATE_ENABLED) {
799 "omap_device: %s() called from invalid state %d\n",
800 __func__, od->_state);
804 ret = _omap_device_idle_hwmods(od);
807 od->_state = OMAP_DEVICE_STATE_IDLE;
813 * omap_device_assert_hardreset - set a device's hardreset line
814 * @pdev: struct platform_device * to reset
815 * @name: const char * name of the reset line
817 * Set the hardreset line identified by @name on the IP blocks
818 * associated with the hwmods backing the platform_device @pdev. All
819 * of the hwmods associated with @pdev must have the same hardreset
820 * line linked to them for this to work. Passes along the return value
821 * of omap_hwmod_assert_hardreset() in the event of any failure, or
822 * returns 0 upon success.
824 int omap_device_assert_hardreset(struct platform_device *pdev, const char *name)
826 struct omap_device *od = to_omap_device(pdev);
830 for (i = 0; i < od->hwmods_cnt; i++) {
831 ret = omap_hwmod_assert_hardreset(od->hwmods[i], name);
840 * omap_device_deassert_hardreset - release a device's hardreset line
841 * @pdev: struct platform_device * to reset
842 * @name: const char * name of the reset line
844 * Release the hardreset line identified by @name on the IP blocks
845 * associated with the hwmods backing the platform_device @pdev. All
846 * of the hwmods associated with @pdev must have the same hardreset
847 * line linked to them for this to work. Passes along the return
848 * value of omap_hwmod_deassert_hardreset() in the event of any
849 * failure, or returns 0 upon success.
851 int omap_device_deassert_hardreset(struct platform_device *pdev,
854 struct omap_device *od = to_omap_device(pdev);
858 for (i = 0; i < od->hwmods_cnt; i++) {
859 ret = omap_hwmod_deassert_hardreset(od->hwmods[i], name);
868 * omap_device_get_by_hwmod_name() - convert a hwmod name to
870 * @oh_name: name of the hwmod device
872 * Returns back a struct device * pointer associated with a hwmod
873 * device represented by a hwmod_name
875 struct device *omap_device_get_by_hwmod_name(const char *oh_name)
877 struct omap_hwmod *oh;
880 WARN(1, "%s: no hwmod name!\n", __func__);
881 return ERR_PTR(-EINVAL);
884 oh = omap_hwmod_lookup(oh_name);
886 WARN(1, "%s: no hwmod for %s\n", __func__,
888 return ERR_PTR(-ENODEV);
891 WARN(1, "%s: no omap_device for %s\n", __func__,
893 return ERR_PTR(-ENODEV);
896 return &oh->od->pdev->dev;
899 static struct notifier_block platform_nb = {
900 .notifier_call = _omap_device_notifier_call,
903 static int __init omap_device_init(void)
905 bus_register_notifier(&platform_bus_type, &platform_nb);
908 omap_postcore_initcall(omap_device_init);
911 * omap_device_late_idle - idle devices without drivers
912 * @dev: struct device * associated with omap_device
915 * Check the driver bound status of this device, and idle it
916 * if there is no driver attached.
918 static int __init omap_device_late_idle(struct device *dev, void *data)
920 struct platform_device *pdev = to_platform_device(dev);
921 struct omap_device *od = to_omap_device(pdev);
928 * If omap_device state is enabled, but has no driver bound,
933 * Some devices (like memory controllers) are always kept
934 * enabled, and should not be idled even with no drivers.
936 for (i = 0; i < od->hwmods_cnt; i++)
937 if (od->hwmods[i]->flags & HWMOD_INIT_NO_IDLE)
940 if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER &&
941 od->_driver_status != BUS_NOTIFY_BIND_DRIVER) {
942 if (od->_state == OMAP_DEVICE_STATE_ENABLED) {
943 dev_warn(dev, "%s: enabled but no driver. Idling\n",
945 omap_device_idle(pdev);
952 static int __init omap_device_late_init(void)
954 bus_for_each_dev(&platform_bus_type, NULL, NULL, omap_device_late_idle);
956 WARN(!of_have_populated_dt(),
957 "legacy booting deprecated, please update to boot with .dts\n");
961 omap_late_initcall_sync(omap_device_late_init);