blob: f80aaaf9f6108c0204c17d9eb770f984f3a303c2 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * platform.c - platform 'pseudo' bus for legacy devices
3 *
4 * Copyright (c) 2002-3 Patrick Mochel
5 * Copyright (c) 2002-3 Open Source Development Labs
6 *
7 * This file is released under the GPLv2
8 *
9 * Please see Documentation/driver-model/platform.txt for more
10 * information.
11 */
12
Andrew Mortondaa41222009-08-06 16:00:44 -070013#include <linux/string.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010014#include <linux/platform_device.h>
Grant Likely05212152010-06-08 07:48:20 -060015#include <linux/of_device.h>
Rob Herring9ec36ca2014-04-23 17:57:41 -050016#include <linux/of_irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/dma-mapping.h>
20#include <linux/bootmem.h>
21#include <linux/err.h>
Tim Schmielau4e57b682005-10-30 15:03:48 -080022#include <linux/slab.h>
Magnus Damm9d730222009-08-20 20:25:32 +020023#include <linux/pm_runtime.h>
Ulf Hanssonf48c7672014-09-29 13:58:47 +020024#include <linux/pm_domain.h>
Jean Delvare689ae232012-07-27 22:14:59 +020025#include <linux/idr.h>
Mika Westerberg91e56872012-10-31 22:45:02 +010026#include <linux/acpi.h>
Sylwester Nawrocki86be4082014-06-18 17:29:32 +020027#include <linux/clk/clk-conf.h>
Kim Phillips3d713e02014-06-02 19:42:58 -050028#include <linux/limits.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
Ben Dooksa1bdc7a2005-10-13 17:54:41 +010030#include "base.h"
Rafael J. Wysockibed2b422012-08-06 01:45:11 +020031#include "power/power.h"
Ben Dooksa1bdc7a2005-10-13 17:54:41 +010032
Jean Delvare689ae232012-07-27 22:14:59 +020033/* For automatically allocated device IDs */
34static DEFINE_IDA(platform_devid_ida);
35
Linus Torvalds1da177e2005-04-16 15:20:36 -070036struct device platform_bus = {
Kay Sievers1e0b2cf2008-10-30 01:36:48 +010037 .init_name = "platform",
Linus Torvalds1da177e2005-04-16 15:20:36 -070038};
Dmitry Torokhova96b2042005-12-10 01:36:28 -050039EXPORT_SYMBOL_GPL(platform_bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41/**
Kumar Galaa77ce812011-06-10 01:52:57 -050042 * arch_setup_pdev_archdata - Allow manipulation of archdata before its used
Randy Dunlap7de636f2011-07-27 12:11:25 -070043 * @pdev: platform device
Kumar Galaa77ce812011-06-10 01:52:57 -050044 *
45 * This is called before platform_device_add() such that any pdev_archdata may
46 * be setup before the platform_notifier is called. So if a user needs to
47 * manipulate any relevant information in the pdev_archdata they can do:
48 *
Sebastian Andrzej Siewiorb1d6d822012-10-29 18:04:53 +010049 * platform_device_alloc()
Fabio Porcedda0258e182013-03-26 10:35:16 +010050 * ... manipulate ...
51 * platform_device_add()
Kumar Galaa77ce812011-06-10 01:52:57 -050052 *
53 * And if they don't care they can just call platform_device_register() and
54 * everything will just work out.
55 */
56void __weak arch_setup_pdev_archdata(struct platform_device *pdev)
57{
58}
59
60/**
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -080061 * platform_get_resource - get a resource for a device
62 * @dev: platform device
63 * @type: resource type
64 * @num: resource index
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 */
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -080066struct resource *platform_get_resource(struct platform_device *dev,
67 unsigned int type, unsigned int num)
Linus Torvalds1da177e2005-04-16 15:20:36 -070068{
69 int i;
70
71 for (i = 0; i < dev->num_resources; i++) {
72 struct resource *r = &dev->resource[i];
73
Magnus Dammc9f66162008-10-15 22:05:15 -070074 if (type == resource_type(r) && num-- == 0)
75 return r;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 }
77 return NULL;
78}
Dmitry Torokhova96b2042005-12-10 01:36:28 -050079EXPORT_SYMBOL_GPL(platform_get_resource);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
81/**
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -080082 * platform_get_irq - get an IRQ for a device
83 * @dev: platform device
84 * @num: IRQ number index
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 */
86int platform_get_irq(struct platform_device *dev, unsigned int num)
87{
Andreas Larsson5cf8f7d2012-10-29 23:26:56 +000088#ifdef CONFIG_SPARC
89 /* sparc does not have irqs represented as IORESOURCE_IRQ resources */
90 if (!dev || num >= dev->archdata.num_irqs)
91 return -ENXIO;
92 return dev->archdata.irqs[num];
93#else
Rob Herring9ec36ca2014-04-23 17:57:41 -050094 struct resource *r;
Guenter Roeckaff008a2014-06-17 15:51:02 -070095 if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) {
96 int ret;
97
98 ret = of_irq_get(dev->dev.of_node, num);
99 if (ret >= 0 || ret == -EPROBE_DEFER)
100 return ret;
101 }
Rob Herring9ec36ca2014-04-23 17:57:41 -0500102
103 r = platform_get_resource(dev, IORESOURCE_IRQ, num);
Linus Walleij7085a742015-02-18 17:12:18 +0100104 /*
105 * The resources may pass trigger flags to the irqs that need
106 * to be set up. It so happens that the trigger flags for
107 * IORESOURCE_BITS correspond 1-to-1 to the IRQF_TRIGGER*
108 * settings.
109 */
110 if (r && r->flags & IORESOURCE_BITS)
111 irqd_set_trigger_type(irq_get_irq_data(r->start),
112 r->flags & IORESOURCE_BITS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
David Vrabel305b3222006-01-19 17:52:27 +0000114 return r ? r->start : -ENXIO;
Andreas Larsson5cf8f7d2012-10-29 23:26:56 +0000115#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116}
Dmitry Torokhova96b2042005-12-10 01:36:28 -0500117EXPORT_SYMBOL_GPL(platform_get_irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
119/**
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800120 * platform_get_resource_byname - get a resource for a device by name
121 * @dev: platform device
122 * @type: resource type
123 * @name: resource name
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 */
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800125struct resource *platform_get_resource_byname(struct platform_device *dev,
Linus Walleijc0afe7b2009-04-27 02:38:16 +0200126 unsigned int type,
127 const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128{
129 int i;
130
131 for (i = 0; i < dev->num_resources; i++) {
132 struct resource *r = &dev->resource[i];
133
Peter Ujfalusi1b8cb922012-08-23 17:10:00 +0300134 if (unlikely(!r->name))
135 continue;
136
Magnus Dammc9f66162008-10-15 22:05:15 -0700137 if (type == resource_type(r) && !strcmp(r->name, name))
138 return r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 }
140 return NULL;
141}
Dmitry Torokhova96b2042005-12-10 01:36:28 -0500142EXPORT_SYMBOL_GPL(platform_get_resource_byname);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
144/**
Wolfram Sangd6ff8552012-11-13 17:47:13 +0100145 * platform_get_irq_byname - get an IRQ for a device by name
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800146 * @dev: platform device
147 * @name: IRQ name
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 */
Linus Walleijc0afe7b2009-04-27 02:38:16 +0200149int platform_get_irq_byname(struct platform_device *dev, const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150{
Grygorii Strashkoad696742014-05-20 13:42:02 +0300151 struct resource *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
Guenter Roeckaff008a2014-06-17 15:51:02 -0700153 if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) {
154 int ret;
155
156 ret = of_irq_get_byname(dev->dev.of_node, name);
157 if (ret >= 0 || ret == -EPROBE_DEFER)
158 return ret;
159 }
Grygorii Strashkoad696742014-05-20 13:42:02 +0300160
161 r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name);
David Vrabel305b3222006-01-19 17:52:27 +0000162 return r ? r->start : -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163}
Dmitry Torokhova96b2042005-12-10 01:36:28 -0500164EXPORT_SYMBOL_GPL(platform_get_irq_byname);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
166/**
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800167 * platform_add_devices - add a numbers of platform devices
168 * @devs: array of platform devices to add
169 * @num: number of platform devices in array
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 */
171int platform_add_devices(struct platform_device **devs, int num)
172{
173 int i, ret = 0;
174
175 for (i = 0; i < num; i++) {
176 ret = platform_device_register(devs[i]);
177 if (ret) {
178 while (--i >= 0)
179 platform_device_unregister(devs[i]);
180 break;
181 }
182 }
183
184 return ret;
185}
Dmitry Torokhova96b2042005-12-10 01:36:28 -0500186EXPORT_SYMBOL_GPL(platform_add_devices);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
Russell King37c12e72005-11-05 21:19:33 +0000188struct platform_object {
189 struct platform_device pdev;
Yann Droneaud1cec24c2014-05-30 22:02:47 +0200190 char name[];
Russell King37c12e72005-11-05 21:19:33 +0000191};
192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193/**
Ben Hutchings3c31f072010-02-14 14:18:53 +0000194 * platform_device_put - destroy a platform device
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800195 * @pdev: platform device to free
Russell King37c12e72005-11-05 21:19:33 +0000196 *
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800197 * Free all memory associated with a platform device. This function must
198 * _only_ be externally called in error cases. All other usage is a bug.
Russell King37c12e72005-11-05 21:19:33 +0000199 */
200void platform_device_put(struct platform_device *pdev)
201{
202 if (pdev)
203 put_device(&pdev->dev);
204}
205EXPORT_SYMBOL_GPL(platform_device_put);
206
207static void platform_device_release(struct device *dev)
208{
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800209 struct platform_object *pa = container_of(dev, struct platform_object,
210 pdev.dev);
Russell King37c12e72005-11-05 21:19:33 +0000211
Grant Likely7096d042010-10-20 11:45:13 -0600212 of_device_node_put(&pa->pdev.dev);
Russell King37c12e72005-11-05 21:19:33 +0000213 kfree(pa->pdev.dev.platform_data);
Samuel Ortize710d7d2011-04-08 00:43:01 +0200214 kfree(pa->pdev.mfd_cell);
Russell King37c12e72005-11-05 21:19:33 +0000215 kfree(pa->pdev.resource);
Kim Phillips3d713e02014-06-02 19:42:58 -0500216 kfree(pa->pdev.driver_override);
Russell King37c12e72005-11-05 21:19:33 +0000217 kfree(pa);
218}
219
220/**
Ben Hutchings3c31f072010-02-14 14:18:53 +0000221 * platform_device_alloc - create a platform device
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800222 * @name: base name of the device we're adding
223 * @id: instance id
Russell King37c12e72005-11-05 21:19:33 +0000224 *
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800225 * Create a platform device object which can have other objects attached
226 * to it, and which will have attached objects freed when it is released.
Russell King37c12e72005-11-05 21:19:33 +0000227 */
Jean Delvare1359555e2007-09-09 12:54:16 +0200228struct platform_device *platform_device_alloc(const char *name, int id)
Russell King37c12e72005-11-05 21:19:33 +0000229{
230 struct platform_object *pa;
231
Yann Droneaud1cec24c2014-05-30 22:02:47 +0200232 pa = kzalloc(sizeof(*pa) + strlen(name) + 1, GFP_KERNEL);
Russell King37c12e72005-11-05 21:19:33 +0000233 if (pa) {
234 strcpy(pa->name, name);
235 pa->pdev.name = pa->name;
236 pa->pdev.id = id;
237 device_initialize(&pa->pdev.dev);
238 pa->pdev.dev.release = platform_device_release;
Kumar Galaa77ce812011-06-10 01:52:57 -0500239 arch_setup_pdev_archdata(&pa->pdev);
Russell King37c12e72005-11-05 21:19:33 +0000240 }
241
Dmitry Torokhov93ce30612005-12-10 01:36:27 -0500242 return pa ? &pa->pdev : NULL;
Russell King37c12e72005-11-05 21:19:33 +0000243}
244EXPORT_SYMBOL_GPL(platform_device_alloc);
245
246/**
Ben Hutchings3c31f072010-02-14 14:18:53 +0000247 * platform_device_add_resources - add resources to a platform device
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800248 * @pdev: platform device allocated by platform_device_alloc to add resources to
249 * @res: set of resources that needs to be allocated for the device
250 * @num: number of resources
Russell King37c12e72005-11-05 21:19:33 +0000251 *
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800252 * Add a copy of the resources to the platform device. The memory
253 * associated with the resources will be freed when the platform device is
254 * released.
Russell King37c12e72005-11-05 21:19:33 +0000255 */
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800256int platform_device_add_resources(struct platform_device *pdev,
Geert Uytterhoeven0b7f1a72009-01-28 21:01:02 +0100257 const struct resource *res, unsigned int num)
Russell King37c12e72005-11-05 21:19:33 +0000258{
Uwe Kleine-Königcea89622011-04-20 09:44:44 +0200259 struct resource *r = NULL;
Russell King37c12e72005-11-05 21:19:33 +0000260
Uwe Kleine-Königcea89622011-04-20 09:44:44 +0200261 if (res) {
262 r = kmemdup(res, sizeof(struct resource) * num, GFP_KERNEL);
263 if (!r)
264 return -ENOMEM;
Russell King37c12e72005-11-05 21:19:33 +0000265 }
Uwe Kleine-Königcea89622011-04-20 09:44:44 +0200266
Uwe Kleine-König4a03d6f2011-04-20 09:44:45 +0200267 kfree(pdev->resource);
Uwe Kleine-Königcea89622011-04-20 09:44:44 +0200268 pdev->resource = r;
269 pdev->num_resources = num;
270 return 0;
Russell King37c12e72005-11-05 21:19:33 +0000271}
272EXPORT_SYMBOL_GPL(platform_device_add_resources);
273
274/**
Ben Hutchings3c31f072010-02-14 14:18:53 +0000275 * platform_device_add_data - add platform-specific data to a platform device
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800276 * @pdev: platform device allocated by platform_device_alloc to add resources to
277 * @data: platform specific data for this platform device
278 * @size: size of platform specific data
Russell King37c12e72005-11-05 21:19:33 +0000279 *
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800280 * Add a copy of platform specific data to the platform device's
281 * platform_data pointer. The memory associated with the platform data
282 * will be freed when the platform device is released.
Russell King37c12e72005-11-05 21:19:33 +0000283 */
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800284int platform_device_add_data(struct platform_device *pdev, const void *data,
285 size_t size)
Russell King37c12e72005-11-05 21:19:33 +0000286{
Uwe Kleine-König27a33f92011-04-20 09:44:42 +0200287 void *d = NULL;
Russell King37c12e72005-11-05 21:19:33 +0000288
Uwe Kleine-König27a33f92011-04-20 09:44:42 +0200289 if (data) {
290 d = kmemdup(data, size, GFP_KERNEL);
291 if (!d)
292 return -ENOMEM;
Russell King37c12e72005-11-05 21:19:33 +0000293 }
Uwe Kleine-König27a33f92011-04-20 09:44:42 +0200294
Uwe Kleine-König251e0312011-04-20 09:44:43 +0200295 kfree(pdev->dev.platform_data);
Uwe Kleine-König27a33f92011-04-20 09:44:42 +0200296 pdev->dev.platform_data = d;
297 return 0;
Russell King37c12e72005-11-05 21:19:33 +0000298}
299EXPORT_SYMBOL_GPL(platform_device_add_data);
300
301/**
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800302 * platform_device_add - add a platform device to device hierarchy
303 * @pdev: platform device we're adding
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 *
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800305 * This is part 2 of platform_device_register(), though may be called
306 * separately _iff_ pdev was allocated by platform_device_alloc().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 */
Russell King37c12e72005-11-05 21:19:33 +0000308int platform_device_add(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309{
Jean Delvare689ae232012-07-27 22:14:59 +0200310 int i, ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
312 if (!pdev)
313 return -EINVAL;
314
315 if (!pdev->dev.parent)
316 pdev->dev.parent = &platform_bus;
317
318 pdev->dev.bus = &platform_bus_type;
319
Jean Delvare689ae232012-07-27 22:14:59 +0200320 switch (pdev->id) {
321 default:
Kay Sievers1e0b2cf2008-10-30 01:36:48 +0100322 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
Jean Delvare689ae232012-07-27 22:14:59 +0200323 break;
324 case PLATFORM_DEVID_NONE:
Greg Kroah-Hartmanacc0e902009-06-02 15:39:55 -0700325 dev_set_name(&pdev->dev, "%s", pdev->name);
Jean Delvare689ae232012-07-27 22:14:59 +0200326 break;
327 case PLATFORM_DEVID_AUTO:
328 /*
329 * Automatically allocated device ID. We mark it as such so
330 * that we remember it must be freed, and we append a suffix
331 * to avoid namespace collision with explicit IDs.
332 */
333 ret = ida_simple_get(&platform_devid_ida, 0, 0, GFP_KERNEL);
334 if (ret < 0)
Greg Kroah-Hartman5da7f702015-06-10 08:38:02 -0700335 goto err_out;
Jean Delvare689ae232012-07-27 22:14:59 +0200336 pdev->id = ret;
337 pdev->id_auto = true;
338 dev_set_name(&pdev->dev, "%s.%d.auto", pdev->name, pdev->id);
339 break;
340 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
342 for (i = 0; i < pdev->num_resources; i++) {
Greg Kroah-Hartman5da7f702015-06-10 08:38:02 -0700343 struct resource *p, *r = &pdev->resource[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
345 if (r->name == NULL)
Kay Sievers1e0b2cf2008-10-30 01:36:48 +0100346 r->name = dev_name(&pdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
348 p = r->parent;
349 if (!p) {
Greg Kroah-Hartman0e6c8612015-06-10 08:38:29 -0700350 if (resource_type(r) == IORESOURCE_MEM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 p = &iomem_resource;
Greg Kroah-Hartman0e6c8612015-06-10 08:38:29 -0700352 else if (resource_type(r) == IORESOURCE_IO)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 p = &ioport_resource;
354 }
355
Greg Kroah-Hartman0e6c8612015-06-10 08:38:29 -0700356 if (p && insert_resource(p, r)) {
Greg Kroah-Hartman5da7f702015-06-10 08:38:02 -0700357 dev_err(&pdev->dev, "failed to claim resource %d\n", i);
358 ret = -EBUSY;
359 goto failed;
360 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 }
362
363 pr_debug("Registering platform device '%s'. Parent at %s\n",
Kay Sievers1e0b2cf2008-10-30 01:36:48 +0100364 dev_name(&pdev->dev), dev_name(pdev->dev.parent));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
Russell Kinge3915532006-05-06 08:15:26 +0100366 ret = device_add(&pdev->dev);
Greg Kroah-Hartman8b2dceb2015-06-10 08:36:50 -0700367 if (ret == 0)
368 return ret;
369
Greg Kroah-Hartman5da7f702015-06-10 08:38:02 -0700370 failed:
Greg Kroah-Hartman8b2dceb2015-06-10 08:36:50 -0700371 if (pdev->id_auto) {
372 ida_simple_remove(&platform_devid_ida, pdev->id);
373 pdev->id = PLATFORM_DEVID_AUTO;
374 }
375
376 while (--i >= 0) {
377 struct resource *r = &pdev->resource[i];
Grant Likely7f5dcaf2015-06-07 15:20:11 +0100378 if (r->parent)
Greg Kroah-Hartman8b2dceb2015-06-10 08:36:50 -0700379 release_resource(r);
380 }
Magnus Dammc9f66162008-10-15 22:05:15 -0700381
Greg Kroah-Hartman5da7f702015-06-10 08:38:02 -0700382 err_out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 return ret;
384}
Russell King37c12e72005-11-05 21:19:33 +0000385EXPORT_SYMBOL_GPL(platform_device_add);
386
387/**
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800388 * platform_device_del - remove a platform-level device
389 * @pdev: platform device we're removing
Dmitry Torokhov93ce30612005-12-10 01:36:27 -0500390 *
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800391 * Note that this function will also release all memory- and port-based
392 * resources owned by the device (@dev->resource). This function must
393 * _only_ be externally called in error cases. All other usage is a bug.
Dmitry Torokhov93ce30612005-12-10 01:36:27 -0500394 */
395void platform_device_del(struct platform_device *pdev)
396{
Greg Kroah-Hartman8b2dceb2015-06-10 08:36:50 -0700397 int i;
Dmitry Torokhov93ce30612005-12-10 01:36:27 -0500398
Greg Kroah-Hartman8b2dceb2015-06-10 08:36:50 -0700399 if (pdev) {
400 device_del(&pdev->dev);
401
402 if (pdev->id_auto) {
403 ida_simple_remove(&platform_devid_ida, pdev->id);
404 pdev->id = PLATFORM_DEVID_AUTO;
405 }
406
407 for (i = 0; i < pdev->num_resources; i++) {
408 struct resource *r = &pdev->resource[i];
Grant Likely7f5dcaf2015-06-07 15:20:11 +0100409 if (r->parent)
Greg Kroah-Hartman8b2dceb2015-06-10 08:36:50 -0700410 release_resource(r);
411 }
412 }
Dmitry Torokhov93ce30612005-12-10 01:36:27 -0500413}
414EXPORT_SYMBOL_GPL(platform_device_del);
415
416/**
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800417 * platform_device_register - add a platform-level device
418 * @pdev: platform device we're adding
Russell King37c12e72005-11-05 21:19:33 +0000419 */
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800420int platform_device_register(struct platform_device *pdev)
Russell King37c12e72005-11-05 21:19:33 +0000421{
422 device_initialize(&pdev->dev);
Kumar Galaa77ce812011-06-10 01:52:57 -0500423 arch_setup_pdev_archdata(pdev);
Russell King37c12e72005-11-05 21:19:33 +0000424 return platform_device_add(pdev);
425}
Dmitry Torokhova96b2042005-12-10 01:36:28 -0500426EXPORT_SYMBOL_GPL(platform_device_register);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
428/**
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800429 * platform_device_unregister - unregister a platform-level device
430 * @pdev: platform device we're unregistering
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 *
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800432 * Unregistration is done in 2 steps. First we release all resources
433 * and remove it from the subsystem, then we drop reference count by
434 * calling platform_device_put().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 */
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800436void platform_device_unregister(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437{
Dmitry Torokhov93ce30612005-12-10 01:36:27 -0500438 platform_device_del(pdev);
439 platform_device_put(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440}
Dmitry Torokhova96b2042005-12-10 01:36:28 -0500441EXPORT_SYMBOL_GPL(platform_device_unregister);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443/**
Uwe Kleine-König01dcc602011-08-25 11:16:00 +0200444 * platform_device_register_full - add a platform-level device with
Uwe Kleine-König44f28bd2010-06-21 16:11:44 +0200445 * resources and platform-specific data
446 *
Uwe Kleine-König01dcc602011-08-25 11:16:00 +0200447 * @pdevinfo: data used to create device
Dmitry Baryshkovd8bf2542008-09-22 14:41:40 -0700448 *
Jani Nikulaf0eae0e2010-03-11 18:11:45 +0200449 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
Dmitry Baryshkovd8bf2542008-09-22 14:41:40 -0700450 */
Uwe Kleine-König01dcc602011-08-25 11:16:00 +0200451struct platform_device *platform_device_register_full(
Uwe Kleine-König5a3072b2011-12-08 22:53:29 +0100452 const struct platform_device_info *pdevinfo)
Dmitry Baryshkovd8bf2542008-09-22 14:41:40 -0700453{
Uwe Kleine-König44f28bd2010-06-21 16:11:44 +0200454 int ret = -ENOMEM;
Dmitry Baryshkovd8bf2542008-09-22 14:41:40 -0700455 struct platform_device *pdev;
Dmitry Baryshkovd8bf2542008-09-22 14:41:40 -0700456
Uwe Kleine-König01dcc602011-08-25 11:16:00 +0200457 pdev = platform_device_alloc(pdevinfo->name, pdevinfo->id);
Uwe Kleine-König44f28bd2010-06-21 16:11:44 +0200458 if (!pdev)
Uwe Kleine-König01dcc602011-08-25 11:16:00 +0200459 goto err_alloc;
Dmitry Baryshkovd8bf2542008-09-22 14:41:40 -0700460
Uwe Kleine-König01dcc602011-08-25 11:16:00 +0200461 pdev->dev.parent = pdevinfo->parent;
Rafael J. Wysockice793482015-03-16 23:49:03 +0100462 pdev->dev.fwnode = pdevinfo->fwnode;
Dmitry Baryshkovd8bf2542008-09-22 14:41:40 -0700463
Uwe Kleine-König01dcc602011-08-25 11:16:00 +0200464 if (pdevinfo->dma_mask) {
465 /*
466 * This memory isn't freed when the device is put,
467 * I don't have a nice idea for that though. Conceptually
468 * dma_mask in struct device should not be a pointer.
469 * See http://thread.gmane.org/gmane.linux.kernel.pci/9081
470 */
471 pdev->dev.dma_mask =
472 kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL);
473 if (!pdev->dev.dma_mask)
474 goto err;
475
476 *pdev->dev.dma_mask = pdevinfo->dma_mask;
477 pdev->dev.coherent_dma_mask = pdevinfo->dma_mask;
478 }
479
480 ret = platform_device_add_resources(pdev,
481 pdevinfo->res, pdevinfo->num_res);
Anton Vorontsov807508c2010-09-07 17:31:54 +0400482 if (ret)
483 goto err;
Dmitry Baryshkovd8bf2542008-09-22 14:41:40 -0700484
Uwe Kleine-König01dcc602011-08-25 11:16:00 +0200485 ret = platform_device_add_data(pdev,
486 pdevinfo->data, pdevinfo->size_data);
Anton Vorontsov807508c2010-09-07 17:31:54 +0400487 if (ret)
488 goto err;
Uwe Kleine-König44f28bd2010-06-21 16:11:44 +0200489
490 ret = platform_device_add(pdev);
491 if (ret) {
492err:
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100493 ACPI_COMPANION_SET(&pdev->dev, NULL);
Uwe Kleine-König01dcc602011-08-25 11:16:00 +0200494 kfree(pdev->dev.dma_mask);
495
496err_alloc:
Uwe Kleine-König44f28bd2010-06-21 16:11:44 +0200497 platform_device_put(pdev);
498 return ERR_PTR(ret);
499 }
Dmitry Baryshkovd8bf2542008-09-22 14:41:40 -0700500
501 return pdev;
Dmitry Baryshkovd8bf2542008-09-22 14:41:40 -0700502}
Uwe Kleine-König01dcc602011-08-25 11:16:00 +0200503EXPORT_SYMBOL_GPL(platform_device_register_full);
Dmitry Baryshkovd8bf2542008-09-22 14:41:40 -0700504
Russell King00d3dcd2005-11-09 17:23:39 +0000505static int platform_drv_probe(struct device *_dev)
506{
507 struct platform_driver *drv = to_platform_driver(_dev->driver);
508 struct platform_device *dev = to_platform_device(_dev);
Rafael J. Wysocki94d76d52012-11-26 10:04:53 +0100509 int ret;
Russell King00d3dcd2005-11-09 17:23:39 +0000510
Sylwester Nawrocki86be4082014-06-18 17:29:32 +0200511 ret = of_clk_set_defaults(_dev->of_node, false);
512 if (ret < 0)
513 return ret;
514
Ulf Hanssoncb518412014-09-19 20:27:38 +0200515 ret = dev_pm_domain_attach(_dev, true);
516 if (ret != -EPROBE_DEFER) {
517 ret = drv->probe(dev);
518 if (ret)
519 dev_pm_domain_detach(_dev, true);
520 }
Rafael J. Wysocki94d76d52012-11-26 10:04:53 +0100521
Johan Hovold3f9120b2013-09-23 16:27:26 +0200522 if (drv->prevent_deferred_probe && ret == -EPROBE_DEFER) {
523 dev_warn(_dev, "probe deferral not supported\n");
524 ret = -ENXIO;
525 }
526
Rafael J. Wysocki94d76d52012-11-26 10:04:53 +0100527 return ret;
Russell King00d3dcd2005-11-09 17:23:39 +0000528}
529
David Brownellc67334f2006-11-16 23:28:47 -0800530static int platform_drv_probe_fail(struct device *_dev)
531{
532 return -ENXIO;
533}
534
Russell King00d3dcd2005-11-09 17:23:39 +0000535static int platform_drv_remove(struct device *_dev)
536{
537 struct platform_driver *drv = to_platform_driver(_dev->driver);
538 struct platform_device *dev = to_platform_device(_dev);
Rafael J. Wysocki94d76d52012-11-26 10:04:53 +0100539 int ret;
Russell King00d3dcd2005-11-09 17:23:39 +0000540
Rafael J. Wysocki94d76d52012-11-26 10:04:53 +0100541 ret = drv->remove(dev);
Ulf Hanssoncb518412014-09-19 20:27:38 +0200542 dev_pm_domain_detach(_dev, true);
Rafael J. Wysocki94d76d52012-11-26 10:04:53 +0100543
544 return ret;
Russell King00d3dcd2005-11-09 17:23:39 +0000545}
546
547static void platform_drv_shutdown(struct device *_dev)
548{
549 struct platform_driver *drv = to_platform_driver(_dev->driver);
550 struct platform_device *dev = to_platform_device(_dev);
551
552 drv->shutdown(dev);
Ulf Hanssoncb518412014-09-19 20:27:38 +0200553 dev_pm_domain_detach(_dev, true);
Russell King00d3dcd2005-11-09 17:23:39 +0000554}
555
Russell King00d3dcd2005-11-09 17:23:39 +0000556/**
Libo Chen94470572013-05-25 12:40:50 +0800557 * __platform_driver_register - register a driver for platform-level devices
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800558 * @drv: platform driver structure
Randy Dunlap08801f92013-07-14 17:43:06 -0700559 * @owner: owning module/driver
Russell King00d3dcd2005-11-09 17:23:39 +0000560 */
Libo Chen94470572013-05-25 12:40:50 +0800561int __platform_driver_register(struct platform_driver *drv,
562 struct module *owner)
Russell King00d3dcd2005-11-09 17:23:39 +0000563{
Libo Chen94470572013-05-25 12:40:50 +0800564 drv->driver.owner = owner;
Russell King00d3dcd2005-11-09 17:23:39 +0000565 drv->driver.bus = &platform_bus_type;
566 if (drv->probe)
567 drv->driver.probe = platform_drv_probe;
568 if (drv->remove)
569 drv->driver.remove = platform_drv_remove;
570 if (drv->shutdown)
571 drv->driver.shutdown = platform_drv_shutdown;
Magnus Damm783ea7d2009-06-04 22:13:33 +0200572
Russell King00d3dcd2005-11-09 17:23:39 +0000573 return driver_register(&drv->driver);
574}
Libo Chen94470572013-05-25 12:40:50 +0800575EXPORT_SYMBOL_GPL(__platform_driver_register);
Russell King00d3dcd2005-11-09 17:23:39 +0000576
577/**
Ben Hutchings3c31f072010-02-14 14:18:53 +0000578 * platform_driver_unregister - unregister a driver for platform-level devices
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800579 * @drv: platform driver structure
Russell King00d3dcd2005-11-09 17:23:39 +0000580 */
581void platform_driver_unregister(struct platform_driver *drv)
582{
583 driver_unregister(&drv->driver);
584}
585EXPORT_SYMBOL_GPL(platform_driver_unregister);
586
David Brownellc67334f2006-11-16 23:28:47 -0800587/**
Wolfram Sangc3b50dc2014-10-28 17:40:41 +0100588 * __platform_driver_probe - register driver for non-hotpluggable device
David Brownellc67334f2006-11-16 23:28:47 -0800589 * @drv: platform driver structure
Johan Hovold3f9120b2013-09-23 16:27:26 +0200590 * @probe: the driver probe routine, probably from an __init section
Wolfram Sangc3b50dc2014-10-28 17:40:41 +0100591 * @module: module which will be the owner of the driver
David Brownellc67334f2006-11-16 23:28:47 -0800592 *
593 * Use this instead of platform_driver_register() when you know the device
594 * is not hotpluggable and has already been registered, and you want to
595 * remove its run-once probe() infrastructure from memory after the driver
596 * has bound to the device.
597 *
598 * One typical use for this would be with drivers for controllers integrated
599 * into system-on-chip processors, where the controller devices have been
600 * configured as part of board setup.
601 *
Johan Hovold3f9120b2013-09-23 16:27:26 +0200602 * Note that this is incompatible with deferred probing.
Fabio Porcedda647c86d2013-03-26 10:35:15 +0100603 *
David Brownellc67334f2006-11-16 23:28:47 -0800604 * Returns zero if the driver registered and bound to a device, else returns
605 * a negative error code and with the driver not registered.
606 */
Wolfram Sangc3b50dc2014-10-28 17:40:41 +0100607int __init_or_module __platform_driver_probe(struct platform_driver *drv,
608 int (*probe)(struct platform_device *), struct module *module)
David Brownellc67334f2006-11-16 23:28:47 -0800609{
610 int retval, code;
611
Dmitry Torokhov5c36eb22015-03-30 16:20:07 -0700612 if (drv->driver.probe_type == PROBE_PREFER_ASYNCHRONOUS) {
613 pr_err("%s: drivers registered with %s can not be probed asynchronously\n",
614 drv->driver.name, __func__);
615 return -EINVAL;
616 }
617
618 /*
619 * We have to run our probes synchronously because we check if
620 * we find any devices to bind to and exit with error if there
621 * are any.
622 */
623 drv->driver.probe_type = PROBE_FORCE_SYNCHRONOUS;
624
Johan Hovold3f9120b2013-09-23 16:27:26 +0200625 /*
626 * Prevent driver from requesting probe deferral to avoid further
627 * futile probe attempts.
628 */
629 drv->prevent_deferred_probe = true;
630
Dmitry Torokhov1a6f2a72009-10-12 20:17:41 -0700631 /* make sure driver won't have bind/unbind attributes */
632 drv->driver.suppress_bind_attrs = true;
633
David Brownellc67334f2006-11-16 23:28:47 -0800634 /* temporary section violation during probe() */
635 drv->probe = probe;
Wolfram Sangc3b50dc2014-10-28 17:40:41 +0100636 retval = code = __platform_driver_register(drv, module);
David Brownellc67334f2006-11-16 23:28:47 -0800637
Dmitry Torokhov1a6f2a72009-10-12 20:17:41 -0700638 /*
639 * Fixup that section violation, being paranoid about code scanning
David Brownellc67334f2006-11-16 23:28:47 -0800640 * the list of drivers in order to probe new devices. Check to see
641 * if the probe was successful, and make sure any forced probes of
642 * new devices fail.
643 */
Patrick Pannutod79d3242010-08-06 17:12:41 -0700644 spin_lock(&drv->driver.bus->p->klist_drivers.k_lock);
David Brownellc67334f2006-11-16 23:28:47 -0800645 drv->probe = NULL;
Greg Kroah-Hartmane5dd1272007-11-28 15:59:15 -0800646 if (code == 0 && list_empty(&drv->driver.p->klist_devices.k_list))
David Brownellc67334f2006-11-16 23:28:47 -0800647 retval = -ENODEV;
648 drv->driver.probe = platform_drv_probe_fail;
Patrick Pannutod79d3242010-08-06 17:12:41 -0700649 spin_unlock(&drv->driver.bus->p->klist_drivers.k_lock);
David Brownellc67334f2006-11-16 23:28:47 -0800650
651 if (code != retval)
652 platform_driver_unregister(drv);
653 return retval;
654}
Wolfram Sangc3b50dc2014-10-28 17:40:41 +0100655EXPORT_SYMBOL_GPL(__platform_driver_probe);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656
Dmitry Torokhovecdf6ce2009-12-29 20:11:20 -0800657/**
Wolfram Sang291f6532014-10-28 17:40:42 +0100658 * __platform_create_bundle - register driver and create corresponding device
Dmitry Torokhovecdf6ce2009-12-29 20:11:20 -0800659 * @driver: platform driver structure
660 * @probe: the driver probe routine, probably from an __init section
661 * @res: set of resources that needs to be allocated for the device
662 * @n_res: number of resources
663 * @data: platform specific data for this platform device
664 * @size: size of platform specific data
Wolfram Sang291f6532014-10-28 17:40:42 +0100665 * @module: module which will be the owner of the driver
Dmitry Torokhovecdf6ce2009-12-29 20:11:20 -0800666 *
667 * Use this in legacy-style modules that probe hardware directly and
668 * register a single platform device and corresponding platform driver.
Jani Nikulaf0eae0e2010-03-11 18:11:45 +0200669 *
670 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
Dmitry Torokhovecdf6ce2009-12-29 20:11:20 -0800671 */
Wolfram Sang291f6532014-10-28 17:40:42 +0100672struct platform_device * __init_or_module __platform_create_bundle(
Dmitry Torokhovecdf6ce2009-12-29 20:11:20 -0800673 struct platform_driver *driver,
674 int (*probe)(struct platform_device *),
675 struct resource *res, unsigned int n_res,
Wolfram Sang291f6532014-10-28 17:40:42 +0100676 const void *data, size_t size, struct module *module)
Dmitry Torokhovecdf6ce2009-12-29 20:11:20 -0800677{
678 struct platform_device *pdev;
679 int error;
680
681 pdev = platform_device_alloc(driver->driver.name, -1);
682 if (!pdev) {
683 error = -ENOMEM;
684 goto err_out;
685 }
686
Anton Vorontsov807508c2010-09-07 17:31:54 +0400687 error = platform_device_add_resources(pdev, res, n_res);
688 if (error)
689 goto err_pdev_put;
Dmitry Torokhovecdf6ce2009-12-29 20:11:20 -0800690
Anton Vorontsov807508c2010-09-07 17:31:54 +0400691 error = platform_device_add_data(pdev, data, size);
692 if (error)
693 goto err_pdev_put;
Dmitry Torokhovecdf6ce2009-12-29 20:11:20 -0800694
695 error = platform_device_add(pdev);
696 if (error)
697 goto err_pdev_put;
698
Wolfram Sang291f6532014-10-28 17:40:42 +0100699 error = __platform_driver_probe(driver, probe, module);
Dmitry Torokhovecdf6ce2009-12-29 20:11:20 -0800700 if (error)
701 goto err_pdev_del;
702
703 return pdev;
704
705err_pdev_del:
706 platform_device_del(pdev);
707err_pdev_put:
708 platform_device_put(pdev);
709err_out:
710 return ERR_PTR(error);
711}
Wolfram Sang291f6532014-10-28 17:40:42 +0100712EXPORT_SYMBOL_GPL(__platform_create_bundle);
Dmitry Torokhovecdf6ce2009-12-29 20:11:20 -0800713
David Brownella0245f72006-05-29 10:37:33 -0700714/* modalias support enables more hands-off userspace setup:
715 * (a) environment variable lets new-style hotplug events work once system is
716 * fully running: "modprobe $MODALIAS"
717 * (b) sysfs attribute lets new-style coldplug recover from hotplug events
718 * mishandled before system is fully running: "modprobe $(cat modalias)"
719 */
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800720static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
721 char *buf)
David Brownella0245f72006-05-29 10:37:33 -0700722{
723 struct platform_device *pdev = to_platform_device(dev);
Zhang Rui8c4ff6d2014-01-14 16:46:37 +0800724 int len;
725
Zhang Ruib9f73062014-01-14 16:46:38 +0800726 len = of_device_get_modalias(dev, buf, PAGE_SIZE -1);
727 if (len != -ENODEV)
728 return len;
729
Zhang Rui8c4ff6d2014-01-14 16:46:37 +0800730 len = acpi_device_modalias(dev, buf, PAGE_SIZE -1);
731 if (len != -ENODEV)
732 return len;
733
734 len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name);
David Brownella0245f72006-05-29 10:37:33 -0700735
736 return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
737}
Greg Kroah-Hartmand06262e2013-08-23 14:24:37 -0700738static DEVICE_ATTR_RO(modalias);
David Brownella0245f72006-05-29 10:37:33 -0700739
Kim Phillips3d713e02014-06-02 19:42:58 -0500740static ssize_t driver_override_store(struct device *dev,
741 struct device_attribute *attr,
742 const char *buf, size_t count)
743{
744 struct platform_device *pdev = to_platform_device(dev);
745 char *driver_override, *old = pdev->driver_override, *cp;
746
747 if (count > PATH_MAX)
748 return -EINVAL;
749
750 driver_override = kstrndup(buf, count, GFP_KERNEL);
751 if (!driver_override)
752 return -ENOMEM;
753
754 cp = strchr(driver_override, '\n');
755 if (cp)
756 *cp = '\0';
757
758 if (strlen(driver_override)) {
759 pdev->driver_override = driver_override;
760 } else {
761 kfree(driver_override);
762 pdev->driver_override = NULL;
763 }
764
765 kfree(old);
766
767 return count;
768}
769
770static ssize_t driver_override_show(struct device *dev,
771 struct device_attribute *attr, char *buf)
772{
773 struct platform_device *pdev = to_platform_device(dev);
774
775 return sprintf(buf, "%s\n", pdev->driver_override);
776}
777static DEVICE_ATTR_RW(driver_override);
778
779
Greg Kroah-Hartmand06262e2013-08-23 14:24:37 -0700780static struct attribute *platform_dev_attrs[] = {
781 &dev_attr_modalias.attr,
Kim Phillips3d713e02014-06-02 19:42:58 -0500782 &dev_attr_driver_override.attr,
Greg Kroah-Hartmand06262e2013-08-23 14:24:37 -0700783 NULL,
David Brownella0245f72006-05-29 10:37:33 -0700784};
Greg Kroah-Hartmand06262e2013-08-23 14:24:37 -0700785ATTRIBUTE_GROUPS(platform_dev);
David Brownella0245f72006-05-29 10:37:33 -0700786
Kay Sievers7eff2e72007-08-14 15:15:12 +0200787static int platform_uevent(struct device *dev, struct kobj_uevent_env *env)
David Brownella0245f72006-05-29 10:37:33 -0700788{
789 struct platform_device *pdev = to_platform_device(dev);
Grant Likelyeca39302010-06-08 07:48:21 -0600790 int rc;
791
792 /* Some devices have extra OF data and an OF-style MODALIAS */
Fabio Porcedda0258e182013-03-26 10:35:16 +0100793 rc = of_device_uevent_modalias(dev, env);
Grant Likelyeca39302010-06-08 07:48:21 -0600794 if (rc != -ENODEV)
795 return rc;
David Brownella0245f72006-05-29 10:37:33 -0700796
Zhang Rui8c4ff6d2014-01-14 16:46:37 +0800797 rc = acpi_device_uevent_modalias(dev, env);
798 if (rc != -ENODEV)
799 return rc;
800
Eric Miao57fee4a2009-02-04 11:52:40 +0800801 add_uevent_var(env, "MODALIAS=%s%s", PLATFORM_MODULE_PREFIX,
Sebastian Andrzej Siewior0a268132011-08-15 16:51:22 +0200802 pdev->name);
David Brownella0245f72006-05-29 10:37:33 -0700803 return 0;
804}
805
Eric Miao57fee4a2009-02-04 11:52:40 +0800806static const struct platform_device_id *platform_match_id(
Uwe Kleine-König831fad22010-01-26 09:35:00 +0100807 const struct platform_device_id *id,
Eric Miao57fee4a2009-02-04 11:52:40 +0800808 struct platform_device *pdev)
809{
810 while (id->name[0]) {
811 if (strcmp(pdev->name, id->name) == 0) {
812 pdev->id_entry = id;
813 return id;
814 }
815 id++;
816 }
817 return NULL;
818}
819
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820/**
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800821 * platform_match - bind platform device to platform driver.
822 * @dev: device.
823 * @drv: driver.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 *
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800825 * Platform device IDs are assumed to be encoded like this:
826 * "<name><instance>", where <name> is a short description of the type of
827 * device, like "pci" or "floppy", and <instance> is the enumerated
828 * instance of the device, like '0' or '42'. Driver IDs are simply
829 * "<name>". So, extract the <name> from the platform_device structure,
830 * and compare it against the name of the driver. Return whether they match
831 * or not.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 */
Greg Kroah-Hartman4a3ad202008-01-24 22:50:12 -0800833static int platform_match(struct device *dev, struct device_driver *drv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834{
Eric Miao71b3e0c2009-01-31 22:47:44 +0800835 struct platform_device *pdev = to_platform_device(dev);
Eric Miao57fee4a2009-02-04 11:52:40 +0800836 struct platform_driver *pdrv = to_platform_driver(drv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837
Kim Phillips3d713e02014-06-02 19:42:58 -0500838 /* When driver_override is set, only bind to the matching driver */
839 if (pdev->driver_override)
840 return !strcmp(pdev->driver_override, drv->name);
841
Grant Likely05212152010-06-08 07:48:20 -0600842 /* Attempt an OF style match first */
843 if (of_driver_match_device(dev, drv))
844 return 1;
845
Mika Westerberg91e56872012-10-31 22:45:02 +0100846 /* Then try ACPI style match */
847 if (acpi_driver_match_device(dev, drv))
848 return 1;
849
Grant Likely05212152010-06-08 07:48:20 -0600850 /* Then try to match against the id table */
Eric Miao57fee4a2009-02-04 11:52:40 +0800851 if (pdrv->id_table)
852 return platform_match_id(pdrv->id_table, pdev) != NULL;
853
854 /* fall-back to driver name match */
Kay Sievers1e0b2cf2008-10-30 01:36:48 +0100855 return (strcmp(pdev->name, drv->name) == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856}
857
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200858#ifdef CONFIG_PM_SLEEP
859
860static int platform_legacy_suspend(struct device *dev, pm_message_t mesg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861{
Magnus Damm783ea7d2009-06-04 22:13:33 +0200862 struct platform_driver *pdrv = to_platform_driver(dev->driver);
863 struct platform_device *pdev = to_platform_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 int ret = 0;
865
Magnus Damm783ea7d2009-06-04 22:13:33 +0200866 if (dev->driver && pdrv->suspend)
867 ret = pdrv->suspend(pdev, mesg);
David Brownell386415d82006-09-03 13:16:45 -0700868
869 return ret;
870}
871
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200872static int platform_legacy_resume(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873{
Magnus Damm783ea7d2009-06-04 22:13:33 +0200874 struct platform_driver *pdrv = to_platform_driver(dev->driver);
875 struct platform_device *pdev = to_platform_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 int ret = 0;
877
Magnus Damm783ea7d2009-06-04 22:13:33 +0200878 if (dev->driver && pdrv->resume)
879 ret = pdrv->resume(pdev);
Russell King9480e302005-10-28 09:52:56 -0700880
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 return ret;
882}
883
Rafael J. Wysocki69c9dd12011-04-29 00:36:05 +0200884#endif /* CONFIG_PM_SLEEP */
Magnus Damm9d730222009-08-20 20:25:32 +0200885
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200886#ifdef CONFIG_SUSPEND
887
Rafael J. Wysocki69c9dd12011-04-29 00:36:05 +0200888int platform_pm_suspend(struct device *dev)
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200889{
890 struct device_driver *drv = dev->driver;
891 int ret = 0;
892
Rafael J. Wysockiadf09492008-10-06 22:46:05 +0200893 if (!drv)
894 return 0;
895
896 if (drv->pm) {
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200897 if (drv->pm->suspend)
898 ret = drv->pm->suspend(dev);
899 } else {
900 ret = platform_legacy_suspend(dev, PMSG_SUSPEND);
901 }
902
903 return ret;
904}
905
Rafael J. Wysocki69c9dd12011-04-29 00:36:05 +0200906int platform_pm_resume(struct device *dev)
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200907{
908 struct device_driver *drv = dev->driver;
909 int ret = 0;
910
Rafael J. Wysockiadf09492008-10-06 22:46:05 +0200911 if (!drv)
912 return 0;
913
914 if (drv->pm) {
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200915 if (drv->pm->resume)
916 ret = drv->pm->resume(dev);
917 } else {
918 ret = platform_legacy_resume(dev);
919 }
920
921 return ret;
922}
923
Rafael J. Wysocki69c9dd12011-04-29 00:36:05 +0200924#endif /* CONFIG_SUSPEND */
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200925
Rafael J. Wysocki1f112ce2011-04-11 22:54:42 +0200926#ifdef CONFIG_HIBERNATE_CALLBACKS
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200927
Rafael J. Wysocki69c9dd12011-04-29 00:36:05 +0200928int platform_pm_freeze(struct device *dev)
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200929{
930 struct device_driver *drv = dev->driver;
931 int ret = 0;
932
933 if (!drv)
934 return 0;
935
936 if (drv->pm) {
937 if (drv->pm->freeze)
938 ret = drv->pm->freeze(dev);
939 } else {
940 ret = platform_legacy_suspend(dev, PMSG_FREEZE);
941 }
942
943 return ret;
944}
945
Rafael J. Wysocki69c9dd12011-04-29 00:36:05 +0200946int platform_pm_thaw(struct device *dev)
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200947{
948 struct device_driver *drv = dev->driver;
949 int ret = 0;
950
Rafael J. Wysockiadf09492008-10-06 22:46:05 +0200951 if (!drv)
952 return 0;
953
954 if (drv->pm) {
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200955 if (drv->pm->thaw)
956 ret = drv->pm->thaw(dev);
957 } else {
958 ret = platform_legacy_resume(dev);
959 }
960
961 return ret;
962}
963
Rafael J. Wysocki69c9dd12011-04-29 00:36:05 +0200964int platform_pm_poweroff(struct device *dev)
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200965{
966 struct device_driver *drv = dev->driver;
967 int ret = 0;
968
Rafael J. Wysockiadf09492008-10-06 22:46:05 +0200969 if (!drv)
970 return 0;
971
972 if (drv->pm) {
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200973 if (drv->pm->poweroff)
974 ret = drv->pm->poweroff(dev);
975 } else {
976 ret = platform_legacy_suspend(dev, PMSG_HIBERNATE);
977 }
978
979 return ret;
980}
981
Rafael J. Wysocki69c9dd12011-04-29 00:36:05 +0200982int platform_pm_restore(struct device *dev)
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200983{
984 struct device_driver *drv = dev->driver;
985 int ret = 0;
986
Rafael J. Wysockiadf09492008-10-06 22:46:05 +0200987 if (!drv)
988 return 0;
989
990 if (drv->pm) {
Rafael J. Wysocki25e18492008-05-21 01:40:43 +0200991 if (drv->pm->restore)
992 ret = drv->pm->restore(dev);
993 } else {
994 ret = platform_legacy_resume(dev);
995 }
996
997 return ret;
998}
999
Rafael J. Wysocki69c9dd12011-04-29 00:36:05 +02001000#endif /* CONFIG_HIBERNATE_CALLBACKS */
Rafael J. Wysocki25e18492008-05-21 01:40:43 +02001001
Dmitry Torokhovd9ab7712009-07-22 00:37:25 +02001002static const struct dev_pm_ops platform_dev_pm_ops = {
Rafael J. Wysocki8b313a32011-04-29 00:36:32 +02001003 .runtime_suspend = pm_generic_runtime_suspend,
1004 .runtime_resume = pm_generic_runtime_resume,
Rafael J. Wysocki69c9dd12011-04-29 00:36:05 +02001005 USE_PLATFORM_PM_SLEEP_OPS
Rafael J. Wysocki25e18492008-05-21 01:40:43 +02001006};
1007
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008struct bus_type platform_bus_type = {
1009 .name = "platform",
Greg Kroah-Hartmand06262e2013-08-23 14:24:37 -07001010 .dev_groups = platform_dev_groups,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011 .match = platform_match,
David Brownella0245f72006-05-29 10:37:33 -07001012 .uevent = platform_uevent,
Magnus Damm9d730222009-08-20 20:25:32 +02001013 .pm = &platform_dev_pm_ops,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014};
Dmitry Torokhova96b2042005-12-10 01:36:28 -05001015EXPORT_SYMBOL_GPL(platform_bus_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016
1017int __init platform_bus_init(void)
1018{
Cornelia Huckfbfb1442006-11-27 10:35:08 +01001019 int error;
1020
Magnus Damm13977092009-03-30 14:37:25 -07001021 early_platform_cleanup();
1022
Cornelia Huckfbfb1442006-11-27 10:35:08 +01001023 error = device_register(&platform_bus);
1024 if (error)
1025 return error;
1026 error = bus_register(&platform_bus_type);
1027 if (error)
1028 device_unregister(&platform_bus);
Pantelis Antoniou801d7282014-10-28 22:36:01 +02001029 of_platform_register_reconfig_notifier();
Cornelia Huckfbfb1442006-11-27 10:35:08 +01001030 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031}
1032
1033#ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK
1034u64 dma_get_required_mask(struct device *dev)
1035{
1036 u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT);
1037 u32 high_totalram = ((max_pfn - 1) >> (32 - PAGE_SHIFT));
1038 u64 mask;
1039
1040 if (!high_totalram) {
1041 /* convert to mask just covering totalram */
1042 low_totalram = (1 << (fls(low_totalram) - 1));
1043 low_totalram += low_totalram - 1;
1044 mask = low_totalram;
1045 } else {
1046 high_totalram = (1 << (fls(high_totalram) - 1));
1047 high_totalram += high_totalram - 1;
1048 mask = (((u64)high_totalram) << 32) + 0xffffffff;
1049 }
James Bottomleye88a0c22008-03-09 11:57:56 -05001050 return mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051}
1052EXPORT_SYMBOL_GPL(dma_get_required_mask);
1053#endif
Magnus Damm13977092009-03-30 14:37:25 -07001054
1055static __initdata LIST_HEAD(early_platform_driver_list);
1056static __initdata LIST_HEAD(early_platform_device_list);
1057
1058/**
Magnus Damm4d26e1392010-03-10 20:50:38 +09001059 * early_platform_driver_register - register early platform driver
Randy Dunlapd86c1302009-04-21 07:22:53 -07001060 * @epdrv: early_platform driver structure
Magnus Damm13977092009-03-30 14:37:25 -07001061 * @buf: string passed from early_param()
Magnus Damm4d26e1392010-03-10 20:50:38 +09001062 *
1063 * Helper function for early_platform_init() / early_platform_init_buffer()
Magnus Damm13977092009-03-30 14:37:25 -07001064 */
1065int __init early_platform_driver_register(struct early_platform_driver *epdrv,
1066 char *buf)
1067{
Magnus Dammc60e0502009-11-27 17:38:51 +09001068 char *tmp;
Magnus Damm13977092009-03-30 14:37:25 -07001069 int n;
1070
1071 /* Simply add the driver to the end of the global list.
1072 * Drivers will by default be put on the list in compiled-in order.
1073 */
1074 if (!epdrv->list.next) {
1075 INIT_LIST_HEAD(&epdrv->list);
1076 list_add_tail(&epdrv->list, &early_platform_driver_list);
1077 }
1078
1079 /* If the user has specified device then make sure the driver
1080 * gets prioritized. The driver of the last device specified on
1081 * command line will be put first on the list.
1082 */
1083 n = strlen(epdrv->pdrv->driver.name);
1084 if (buf && !strncmp(buf, epdrv->pdrv->driver.name, n)) {
1085 list_move(&epdrv->list, &early_platform_driver_list);
1086
Magnus Dammc60e0502009-11-27 17:38:51 +09001087 /* Allow passing parameters after device name */
1088 if (buf[n] == '\0' || buf[n] == ',')
Magnus Damm13977092009-03-30 14:37:25 -07001089 epdrv->requested_id = -1;
Magnus Dammc60e0502009-11-27 17:38:51 +09001090 else {
1091 epdrv->requested_id = simple_strtoul(&buf[n + 1],
1092 &tmp, 10);
1093
1094 if (buf[n] != '.' || (tmp == &buf[n + 1])) {
1095 epdrv->requested_id = EARLY_PLATFORM_ID_ERROR;
1096 n = 0;
1097 } else
1098 n += strcspn(&buf[n + 1], ",") + 1;
1099 }
1100
1101 if (buf[n] == ',')
1102 n++;
1103
1104 if (epdrv->bufsize) {
1105 memcpy(epdrv->buffer, &buf[n],
1106 min_t(int, epdrv->bufsize, strlen(&buf[n]) + 1));
1107 epdrv->buffer[epdrv->bufsize - 1] = '\0';
1108 }
Magnus Damm13977092009-03-30 14:37:25 -07001109 }
1110
1111 return 0;
1112}
1113
1114/**
Magnus Damm4d26e1392010-03-10 20:50:38 +09001115 * early_platform_add_devices - adds a number of early platform devices
Magnus Damm13977092009-03-30 14:37:25 -07001116 * @devs: array of early platform devices to add
1117 * @num: number of early platform devices in array
Magnus Damm4d26e1392010-03-10 20:50:38 +09001118 *
1119 * Used by early architecture code to register early platform devices and
1120 * their platform data.
Magnus Damm13977092009-03-30 14:37:25 -07001121 */
1122void __init early_platform_add_devices(struct platform_device **devs, int num)
1123{
1124 struct device *dev;
1125 int i;
1126
1127 /* simply add the devices to list */
1128 for (i = 0; i < num; i++) {
1129 dev = &devs[i]->dev;
1130
1131 if (!dev->devres_head.next) {
Rafael J. Wysockibed2b422012-08-06 01:45:11 +02001132 pm_runtime_early_init(dev);
Magnus Damm13977092009-03-30 14:37:25 -07001133 INIT_LIST_HEAD(&dev->devres_head);
1134 list_add_tail(&dev->devres_head,
1135 &early_platform_device_list);
1136 }
1137 }
1138}
1139
1140/**
Magnus Damm4d26e1392010-03-10 20:50:38 +09001141 * early_platform_driver_register_all - register early platform drivers
Magnus Damm13977092009-03-30 14:37:25 -07001142 * @class_str: string to identify early platform driver class
Magnus Damm4d26e1392010-03-10 20:50:38 +09001143 *
1144 * Used by architecture code to register all early platform drivers
1145 * for a certain class. If omitted then only early platform drivers
1146 * with matching kernel command line class parameters will be registered.
Magnus Damm13977092009-03-30 14:37:25 -07001147 */
1148void __init early_platform_driver_register_all(char *class_str)
1149{
1150 /* The "class_str" parameter may or may not be present on the kernel
1151 * command line. If it is present then there may be more than one
1152 * matching parameter.
1153 *
1154 * Since we register our early platform drivers using early_param()
1155 * we need to make sure that they also get registered in the case
1156 * when the parameter is missing from the kernel command line.
1157 *
1158 * We use parse_early_options() to make sure the early_param() gets
1159 * called at least once. The early_param() may be called more than
1160 * once since the name of the preferred device may be specified on
1161 * the kernel command line. early_platform_driver_register() handles
1162 * this case for us.
1163 */
1164 parse_early_options(class_str);
1165}
1166
1167/**
Magnus Damm4d26e1392010-03-10 20:50:38 +09001168 * early_platform_match - find early platform device matching driver
Randy Dunlapd86c1302009-04-21 07:22:53 -07001169 * @epdrv: early platform driver structure
Magnus Damm13977092009-03-30 14:37:25 -07001170 * @id: id to match against
1171 */
Hanjun Guoa8257912013-08-17 20:42:25 +08001172static struct platform_device * __init
Magnus Damm13977092009-03-30 14:37:25 -07001173early_platform_match(struct early_platform_driver *epdrv, int id)
1174{
1175 struct platform_device *pd;
1176
1177 list_for_each_entry(pd, &early_platform_device_list, dev.devres_head)
1178 if (platform_match(&pd->dev, &epdrv->pdrv->driver))
1179 if (pd->id == id)
1180 return pd;
1181
1182 return NULL;
1183}
1184
1185/**
Magnus Damm4d26e1392010-03-10 20:50:38 +09001186 * early_platform_left - check if early platform driver has matching devices
Randy Dunlapd86c1302009-04-21 07:22:53 -07001187 * @epdrv: early platform driver structure
Magnus Damm13977092009-03-30 14:37:25 -07001188 * @id: return true if id or above exists
1189 */
Hanjun Guoa8257912013-08-17 20:42:25 +08001190static int __init early_platform_left(struct early_platform_driver *epdrv,
Magnus Damm13977092009-03-30 14:37:25 -07001191 int id)
1192{
1193 struct platform_device *pd;
1194
1195 list_for_each_entry(pd, &early_platform_device_list, dev.devres_head)
1196 if (platform_match(&pd->dev, &epdrv->pdrv->driver))
1197 if (pd->id >= id)
1198 return 1;
1199
1200 return 0;
1201}
1202
1203/**
Magnus Damm4d26e1392010-03-10 20:50:38 +09001204 * early_platform_driver_probe_id - probe drivers matching class_str and id
Magnus Damm13977092009-03-30 14:37:25 -07001205 * @class_str: string to identify early platform driver class
1206 * @id: id to match against
1207 * @nr_probe: number of platform devices to successfully probe before exiting
1208 */
1209static int __init early_platform_driver_probe_id(char *class_str,
1210 int id,
1211 int nr_probe)
1212{
1213 struct early_platform_driver *epdrv;
1214 struct platform_device *match;
1215 int match_id;
1216 int n = 0;
1217 int left = 0;
1218
1219 list_for_each_entry(epdrv, &early_platform_driver_list, list) {
1220 /* only use drivers matching our class_str */
1221 if (strcmp(class_str, epdrv->class_str))
1222 continue;
1223
1224 if (id == -2) {
1225 match_id = epdrv->requested_id;
1226 left = 1;
1227
1228 } else {
1229 match_id = id;
1230 left += early_platform_left(epdrv, id);
1231
1232 /* skip requested id */
1233 switch (epdrv->requested_id) {
1234 case EARLY_PLATFORM_ID_ERROR:
1235 case EARLY_PLATFORM_ID_UNSET:
1236 break;
1237 default:
1238 if (epdrv->requested_id == id)
1239 match_id = EARLY_PLATFORM_ID_UNSET;
1240 }
1241 }
1242
1243 switch (match_id) {
1244 case EARLY_PLATFORM_ID_ERROR:
Fabio Porcedda0258e182013-03-26 10:35:16 +01001245 pr_warn("%s: unable to parse %s parameter\n",
1246 class_str, epdrv->pdrv->driver.name);
Magnus Damm13977092009-03-30 14:37:25 -07001247 /* fall-through */
1248 case EARLY_PLATFORM_ID_UNSET:
1249 match = NULL;
1250 break;
1251 default:
1252 match = early_platform_match(epdrv, match_id);
1253 }
1254
1255 if (match) {
Paul Mundta636ee72010-03-09 06:57:53 +00001256 /*
1257 * Set up a sensible init_name to enable
1258 * dev_name() and others to be used before the
1259 * rest of the driver core is initialized.
1260 */
Paul Mundt06fe53b2010-05-13 17:56:56 +09001261 if (!match->dev.init_name && slab_is_available()) {
Paul Mundta636ee72010-03-09 06:57:53 +00001262 if (match->id != -1)
Paul Mundtbd050862010-03-29 15:51:35 +09001263 match->dev.init_name =
1264 kasprintf(GFP_KERNEL, "%s.%d",
1265 match->name,
1266 match->id);
Paul Mundta636ee72010-03-09 06:57:53 +00001267 else
Paul Mundtbd050862010-03-29 15:51:35 +09001268 match->dev.init_name =
1269 kasprintf(GFP_KERNEL, "%s",
1270 match->name);
Paul Mundta636ee72010-03-09 06:57:53 +00001271
Paul Mundta636ee72010-03-09 06:57:53 +00001272 if (!match->dev.init_name)
1273 return -ENOMEM;
1274 }
Paul Mundtbd050862010-03-29 15:51:35 +09001275
Magnus Damm13977092009-03-30 14:37:25 -07001276 if (epdrv->pdrv->probe(match))
Fabio Porcedda0258e182013-03-26 10:35:16 +01001277 pr_warn("%s: unable to probe %s early.\n",
1278 class_str, match->name);
Magnus Damm13977092009-03-30 14:37:25 -07001279 else
1280 n++;
1281 }
1282
1283 if (n >= nr_probe)
1284 break;
1285 }
1286
1287 if (left)
1288 return n;
1289 else
1290 return -ENODEV;
1291}
1292
1293/**
Magnus Damm4d26e1392010-03-10 20:50:38 +09001294 * early_platform_driver_probe - probe a class of registered drivers
Magnus Damm13977092009-03-30 14:37:25 -07001295 * @class_str: string to identify early platform driver class
1296 * @nr_probe: number of platform devices to successfully probe before exiting
1297 * @user_only: only probe user specified early platform devices
Magnus Damm4d26e1392010-03-10 20:50:38 +09001298 *
1299 * Used by architecture code to probe registered early platform drivers
1300 * within a certain class. For probe to happen a registered early platform
1301 * device matching a registered early platform driver is needed.
Magnus Damm13977092009-03-30 14:37:25 -07001302 */
1303int __init early_platform_driver_probe(char *class_str,
1304 int nr_probe,
1305 int user_only)
1306{
1307 int k, n, i;
1308
1309 n = 0;
1310 for (i = -2; n < nr_probe; i++) {
1311 k = early_platform_driver_probe_id(class_str, i, nr_probe - n);
1312
1313 if (k < 0)
1314 break;
1315
1316 n += k;
1317
1318 if (user_only)
1319 break;
1320 }
1321
1322 return n;
1323}
1324
1325/**
1326 * early_platform_cleanup - clean up early platform code
1327 */
1328void __init early_platform_cleanup(void)
1329{
1330 struct platform_device *pd, *pd2;
1331
1332 /* clean up the devres list used to chain devices */
1333 list_for_each_entry_safe(pd, pd2, &early_platform_device_list,
1334 dev.devres_head) {
1335 list_del(&pd->dev.devres_head);
1336 memset(&pd->dev.devres_head, 0, sizeof(pd->dev.devres_head));
1337 }
1338}
1339