Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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 Morton | daa4122 | 2009-08-06 16:00:44 -0700 | [diff] [blame] | 13 | #include <linux/string.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 14 | #include <linux/platform_device.h> |
Grant Likely | 0521215 | 2010-06-08 07:48:20 -0600 | [diff] [blame] | 15 | #include <linux/of_device.h> |
Rob Herring | 9ec36ca | 2014-04-23 17:57:41 -0500 | [diff] [blame] | 16 | #include <linux/of_irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #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 Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 22 | #include <linux/slab.h> |
Magnus Damm | 9d73022 | 2009-08-20 20:25:32 +0200 | [diff] [blame] | 23 | #include <linux/pm_runtime.h> |
Ulf Hansson | f48c767 | 2014-09-29 13:58:47 +0200 | [diff] [blame] | 24 | #include <linux/pm_domain.h> |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 25 | #include <linux/idr.h> |
Mika Westerberg | 91e5687 | 2012-10-31 22:45:02 +0100 | [diff] [blame] | 26 | #include <linux/acpi.h> |
Sylwester Nawrocki | 86be408 | 2014-06-18 17:29:32 +0200 | [diff] [blame] | 27 | #include <linux/clk/clk-conf.h> |
Kim Phillips | 3d713e0 | 2014-06-02 19:42:58 -0500 | [diff] [blame] | 28 | #include <linux/limits.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
Ben Dooks | a1bdc7a | 2005-10-13 17:54:41 +0100 | [diff] [blame] | 30 | #include "base.h" |
Rafael J. Wysocki | bed2b42 | 2012-08-06 01:45:11 +0200 | [diff] [blame] | 31 | #include "power/power.h" |
Ben Dooks | a1bdc7a | 2005-10-13 17:54:41 +0100 | [diff] [blame] | 32 | |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 33 | /* For automatically allocated device IDs */ |
| 34 | static DEFINE_IDA(platform_devid_ida); |
| 35 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | struct device platform_bus = { |
Kay Sievers | 1e0b2cf | 2008-10-30 01:36:48 +0100 | [diff] [blame] | 37 | .init_name = "platform", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | }; |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 39 | EXPORT_SYMBOL_GPL(platform_bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | /** |
Kumar Gala | a77ce81 | 2011-06-10 01:52:57 -0500 | [diff] [blame] | 42 | * arch_setup_pdev_archdata - Allow manipulation of archdata before its used |
Randy Dunlap | 7de636f | 2011-07-27 12:11:25 -0700 | [diff] [blame] | 43 | * @pdev: platform device |
Kumar Gala | a77ce81 | 2011-06-10 01:52:57 -0500 | [diff] [blame] | 44 | * |
| 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 Siewior | b1d6d82 | 2012-10-29 18:04:53 +0100 | [diff] [blame] | 49 | * platform_device_alloc() |
Fabio Porcedda | 0258e18 | 2013-03-26 10:35:16 +0100 | [diff] [blame] | 50 | * ... manipulate ... |
| 51 | * platform_device_add() |
Kumar Gala | a77ce81 | 2011-06-10 01:52:57 -0500 | [diff] [blame] | 52 | * |
| 53 | * And if they don't care they can just call platform_device_register() and |
| 54 | * everything will just work out. |
| 55 | */ |
| 56 | void __weak arch_setup_pdev_archdata(struct platform_device *pdev) |
| 57 | { |
| 58 | } |
| 59 | |
| 60 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 61 | * platform_get_resource - get a resource for a device |
| 62 | * @dev: platform device |
| 63 | * @type: resource type |
| 64 | * @num: resource index |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 66 | struct resource *platform_get_resource(struct platform_device *dev, |
| 67 | unsigned int type, unsigned int num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | { |
| 69 | int i; |
| 70 | |
| 71 | for (i = 0; i < dev->num_resources; i++) { |
| 72 | struct resource *r = &dev->resource[i]; |
| 73 | |
Magnus Damm | c9f6616 | 2008-10-15 22:05:15 -0700 | [diff] [blame] | 74 | if (type == resource_type(r) && num-- == 0) |
| 75 | return r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | } |
| 77 | return NULL; |
| 78 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 79 | EXPORT_SYMBOL_GPL(platform_get_resource); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
| 81 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 82 | * platform_get_irq - get an IRQ for a device |
| 83 | * @dev: platform device |
| 84 | * @num: IRQ number index |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | */ |
| 86 | int platform_get_irq(struct platform_device *dev, unsigned int num) |
| 87 | { |
Andreas Larsson | 5cf8f7d | 2012-10-29 23:26:56 +0000 | [diff] [blame] | 88 | #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 Herring | 9ec36ca | 2014-04-23 17:57:41 -0500 | [diff] [blame] | 94 | struct resource *r; |
Guenter Roeck | aff008a | 2014-06-17 15:51:02 -0700 | [diff] [blame] | 95 | 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 Herring | 9ec36ca | 2014-04-23 17:57:41 -0500 | [diff] [blame] | 102 | |
| 103 | r = platform_get_resource(dev, IORESOURCE_IRQ, num); |
Linus Walleij | 7085a74 | 2015-02-18 17:12:18 +0100 | [diff] [blame] | 104 | /* |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
David Vrabel | 305b322 | 2006-01-19 17:52:27 +0000 | [diff] [blame] | 114 | return r ? r->start : -ENXIO; |
Andreas Larsson | 5cf8f7d | 2012-10-29 23:26:56 +0000 | [diff] [blame] | 115 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 117 | EXPORT_SYMBOL_GPL(platform_get_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
| 119 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 120 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 125 | struct resource *platform_get_resource_byname(struct platform_device *dev, |
Linus Walleij | c0afe7b | 2009-04-27 02:38:16 +0200 | [diff] [blame] | 126 | unsigned int type, |
| 127 | const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | { |
| 129 | int i; |
| 130 | |
| 131 | for (i = 0; i < dev->num_resources; i++) { |
| 132 | struct resource *r = &dev->resource[i]; |
| 133 | |
Peter Ujfalusi | 1b8cb92 | 2012-08-23 17:10:00 +0300 | [diff] [blame] | 134 | if (unlikely(!r->name)) |
| 135 | continue; |
| 136 | |
Magnus Damm | c9f6616 | 2008-10-15 22:05:15 -0700 | [diff] [blame] | 137 | if (type == resource_type(r) && !strcmp(r->name, name)) |
| 138 | return r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | } |
| 140 | return NULL; |
| 141 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 142 | EXPORT_SYMBOL_GPL(platform_get_resource_byname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
| 144 | /** |
Wolfram Sang | d6ff855 | 2012-11-13 17:47:13 +0100 | [diff] [blame] | 145 | * platform_get_irq_byname - get an IRQ for a device by name |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 146 | * @dev: platform device |
| 147 | * @name: IRQ name |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | */ |
Linus Walleij | c0afe7b | 2009-04-27 02:38:16 +0200 | [diff] [blame] | 149 | int platform_get_irq_byname(struct platform_device *dev, const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | { |
Grygorii Strashko | ad69674 | 2014-05-20 13:42:02 +0300 | [diff] [blame] | 151 | struct resource *r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
Guenter Roeck | aff008a | 2014-06-17 15:51:02 -0700 | [diff] [blame] | 153 | 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 Strashko | ad69674 | 2014-05-20 13:42:02 +0300 | [diff] [blame] | 160 | |
| 161 | r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name); |
David Vrabel | 305b322 | 2006-01-19 17:52:27 +0000 | [diff] [blame] | 162 | return r ? r->start : -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 164 | EXPORT_SYMBOL_GPL(platform_get_irq_byname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
| 166 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 167 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | */ |
| 171 | int 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 Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 186 | EXPORT_SYMBOL_GPL(platform_add_devices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 188 | struct platform_object { |
| 189 | struct platform_device pdev; |
Yann Droneaud | 1cec24c | 2014-05-30 22:02:47 +0200 | [diff] [blame] | 190 | char name[]; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 191 | }; |
| 192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | /** |
Ben Hutchings | 3c31f07 | 2010-02-14 14:18:53 +0000 | [diff] [blame] | 194 | * platform_device_put - destroy a platform device |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 195 | * @pdev: platform device to free |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 196 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 197 | * 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 King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 199 | */ |
| 200 | void platform_device_put(struct platform_device *pdev) |
| 201 | { |
| 202 | if (pdev) |
| 203 | put_device(&pdev->dev); |
| 204 | } |
| 205 | EXPORT_SYMBOL_GPL(platform_device_put); |
| 206 | |
| 207 | static void platform_device_release(struct device *dev) |
| 208 | { |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 209 | struct platform_object *pa = container_of(dev, struct platform_object, |
| 210 | pdev.dev); |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 211 | |
Grant Likely | 7096d04 | 2010-10-20 11:45:13 -0600 | [diff] [blame] | 212 | of_device_node_put(&pa->pdev.dev); |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 213 | kfree(pa->pdev.dev.platform_data); |
Samuel Ortiz | e710d7d | 2011-04-08 00:43:01 +0200 | [diff] [blame] | 214 | kfree(pa->pdev.mfd_cell); |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 215 | kfree(pa->pdev.resource); |
Kim Phillips | 3d713e0 | 2014-06-02 19:42:58 -0500 | [diff] [blame] | 216 | kfree(pa->pdev.driver_override); |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 217 | kfree(pa); |
| 218 | } |
| 219 | |
| 220 | /** |
Ben Hutchings | 3c31f07 | 2010-02-14 14:18:53 +0000 | [diff] [blame] | 221 | * platform_device_alloc - create a platform device |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 222 | * @name: base name of the device we're adding |
| 223 | * @id: instance id |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 224 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 225 | * 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 King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 227 | */ |
Jean Delvare | 1359555e | 2007-09-09 12:54:16 +0200 | [diff] [blame] | 228 | struct platform_device *platform_device_alloc(const char *name, int id) |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 229 | { |
| 230 | struct platform_object *pa; |
| 231 | |
Yann Droneaud | 1cec24c | 2014-05-30 22:02:47 +0200 | [diff] [blame] | 232 | pa = kzalloc(sizeof(*pa) + strlen(name) + 1, GFP_KERNEL); |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 233 | 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 Gala | a77ce81 | 2011-06-10 01:52:57 -0500 | [diff] [blame] | 239 | arch_setup_pdev_archdata(&pa->pdev); |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 240 | } |
| 241 | |
Dmitry Torokhov | 93ce3061 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 242 | return pa ? &pa->pdev : NULL; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 243 | } |
| 244 | EXPORT_SYMBOL_GPL(platform_device_alloc); |
| 245 | |
| 246 | /** |
Ben Hutchings | 3c31f07 | 2010-02-14 14:18:53 +0000 | [diff] [blame] | 247 | * platform_device_add_resources - add resources to a platform device |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 248 | * @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 King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 251 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 252 | * 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 King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 255 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 256 | int platform_device_add_resources(struct platform_device *pdev, |
Geert Uytterhoeven | 0b7f1a7 | 2009-01-28 21:01:02 +0100 | [diff] [blame] | 257 | const struct resource *res, unsigned int num) |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 258 | { |
Uwe Kleine-König | cea8962 | 2011-04-20 09:44:44 +0200 | [diff] [blame] | 259 | struct resource *r = NULL; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 260 | |
Uwe Kleine-König | cea8962 | 2011-04-20 09:44:44 +0200 | [diff] [blame] | 261 | if (res) { |
| 262 | r = kmemdup(res, sizeof(struct resource) * num, GFP_KERNEL); |
| 263 | if (!r) |
| 264 | return -ENOMEM; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 265 | } |
Uwe Kleine-König | cea8962 | 2011-04-20 09:44:44 +0200 | [diff] [blame] | 266 | |
Uwe Kleine-König | 4a03d6f | 2011-04-20 09:44:45 +0200 | [diff] [blame] | 267 | kfree(pdev->resource); |
Uwe Kleine-König | cea8962 | 2011-04-20 09:44:44 +0200 | [diff] [blame] | 268 | pdev->resource = r; |
| 269 | pdev->num_resources = num; |
| 270 | return 0; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 271 | } |
| 272 | EXPORT_SYMBOL_GPL(platform_device_add_resources); |
| 273 | |
| 274 | /** |
Ben Hutchings | 3c31f07 | 2010-02-14 14:18:53 +0000 | [diff] [blame] | 275 | * platform_device_add_data - add platform-specific data to a platform device |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 276 | * @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 King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 279 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 280 | * 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 King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 283 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 284 | int platform_device_add_data(struct platform_device *pdev, const void *data, |
| 285 | size_t size) |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 286 | { |
Uwe Kleine-König | 27a33f9 | 2011-04-20 09:44:42 +0200 | [diff] [blame] | 287 | void *d = NULL; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 288 | |
Uwe Kleine-König | 27a33f9 | 2011-04-20 09:44:42 +0200 | [diff] [blame] | 289 | if (data) { |
| 290 | d = kmemdup(data, size, GFP_KERNEL); |
| 291 | if (!d) |
| 292 | return -ENOMEM; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 293 | } |
Uwe Kleine-König | 27a33f9 | 2011-04-20 09:44:42 +0200 | [diff] [blame] | 294 | |
Uwe Kleine-König | 251e031 | 2011-04-20 09:44:43 +0200 | [diff] [blame] | 295 | kfree(pdev->dev.platform_data); |
Uwe Kleine-König | 27a33f9 | 2011-04-20 09:44:42 +0200 | [diff] [blame] | 296 | pdev->dev.platform_data = d; |
| 297 | return 0; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 298 | } |
| 299 | EXPORT_SYMBOL_GPL(platform_device_add_data); |
| 300 | |
| 301 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 302 | * platform_device_add - add a platform device to device hierarchy |
| 303 | * @pdev: platform device we're adding |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 305 | * This is part 2 of platform_device_register(), though may be called |
| 306 | * separately _iff_ pdev was allocated by platform_device_alloc(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | */ |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 308 | int platform_device_add(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | { |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 310 | int i, ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | |
| 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 Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 320 | switch (pdev->id) { |
| 321 | default: |
Kay Sievers | 1e0b2cf | 2008-10-30 01:36:48 +0100 | [diff] [blame] | 322 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 323 | break; |
| 324 | case PLATFORM_DEVID_NONE: |
Greg Kroah-Hartman | acc0e90 | 2009-06-02 15:39:55 -0700 | [diff] [blame] | 325 | dev_set_name(&pdev->dev, "%s", pdev->name); |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 326 | 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-Hartman | 5da7f70 | 2015-06-10 08:38:02 -0700 | [diff] [blame] | 335 | goto err_out; |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 336 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | |
| 342 | for (i = 0; i < pdev->num_resources; i++) { |
Greg Kroah-Hartman | 5da7f70 | 2015-06-10 08:38:02 -0700 | [diff] [blame] | 343 | struct resource *p, *r = &pdev->resource[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
| 345 | if (r->name == NULL) |
Kay Sievers | 1e0b2cf | 2008-10-30 01:36:48 +0100 | [diff] [blame] | 346 | r->name = dev_name(&pdev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
| 348 | p = r->parent; |
| 349 | if (!p) { |
Greg Kroah-Hartman | 0e6c861 | 2015-06-10 08:38:29 -0700 | [diff] [blame] | 350 | if (resource_type(r) == IORESOURCE_MEM) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | p = &iomem_resource; |
Greg Kroah-Hartman | 0e6c861 | 2015-06-10 08:38:29 -0700 | [diff] [blame] | 352 | else if (resource_type(r) == IORESOURCE_IO) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | p = &ioport_resource; |
| 354 | } |
| 355 | |
Greg Kroah-Hartman | 0e6c861 | 2015-06-10 08:38:29 -0700 | [diff] [blame] | 356 | if (p && insert_resource(p, r)) { |
Greg Kroah-Hartman | 5da7f70 | 2015-06-10 08:38:02 -0700 | [diff] [blame] | 357 | dev_err(&pdev->dev, "failed to claim resource %d\n", i); |
| 358 | ret = -EBUSY; |
| 359 | goto failed; |
| 360 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } |
| 362 | |
| 363 | pr_debug("Registering platform device '%s'. Parent at %s\n", |
Kay Sievers | 1e0b2cf | 2008-10-30 01:36:48 +0100 | [diff] [blame] | 364 | dev_name(&pdev->dev), dev_name(pdev->dev.parent)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
Russell King | e391553 | 2006-05-06 08:15:26 +0100 | [diff] [blame] | 366 | ret = device_add(&pdev->dev); |
Greg Kroah-Hartman | 8b2dceb | 2015-06-10 08:36:50 -0700 | [diff] [blame] | 367 | if (ret == 0) |
| 368 | return ret; |
| 369 | |
Greg Kroah-Hartman | 5da7f70 | 2015-06-10 08:38:02 -0700 | [diff] [blame] | 370 | failed: |
Greg Kroah-Hartman | 8b2dceb | 2015-06-10 08:36:50 -0700 | [diff] [blame] | 371 | 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 Likely | 7f5dcaf | 2015-06-07 15:20:11 +0100 | [diff] [blame^] | 378 | if (r->parent) |
Greg Kroah-Hartman | 8b2dceb | 2015-06-10 08:36:50 -0700 | [diff] [blame] | 379 | release_resource(r); |
| 380 | } |
Magnus Damm | c9f6616 | 2008-10-15 22:05:15 -0700 | [diff] [blame] | 381 | |
Greg Kroah-Hartman | 5da7f70 | 2015-06-10 08:38:02 -0700 | [diff] [blame] | 382 | err_out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | return ret; |
| 384 | } |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 385 | EXPORT_SYMBOL_GPL(platform_device_add); |
| 386 | |
| 387 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 388 | * platform_device_del - remove a platform-level device |
| 389 | * @pdev: platform device we're removing |
Dmitry Torokhov | 93ce3061 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 390 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 391 | * 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 Torokhov | 93ce3061 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 394 | */ |
| 395 | void platform_device_del(struct platform_device *pdev) |
| 396 | { |
Greg Kroah-Hartman | 8b2dceb | 2015-06-10 08:36:50 -0700 | [diff] [blame] | 397 | int i; |
Dmitry Torokhov | 93ce3061 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 398 | |
Greg Kroah-Hartman | 8b2dceb | 2015-06-10 08:36:50 -0700 | [diff] [blame] | 399 | 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 Likely | 7f5dcaf | 2015-06-07 15:20:11 +0100 | [diff] [blame^] | 409 | if (r->parent) |
Greg Kroah-Hartman | 8b2dceb | 2015-06-10 08:36:50 -0700 | [diff] [blame] | 410 | release_resource(r); |
| 411 | } |
| 412 | } |
Dmitry Torokhov | 93ce3061 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 413 | } |
| 414 | EXPORT_SYMBOL_GPL(platform_device_del); |
| 415 | |
| 416 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 417 | * platform_device_register - add a platform-level device |
| 418 | * @pdev: platform device we're adding |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 419 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 420 | int platform_device_register(struct platform_device *pdev) |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 421 | { |
| 422 | device_initialize(&pdev->dev); |
Kumar Gala | a77ce81 | 2011-06-10 01:52:57 -0500 | [diff] [blame] | 423 | arch_setup_pdev_archdata(pdev); |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 424 | return platform_device_add(pdev); |
| 425 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 426 | EXPORT_SYMBOL_GPL(platform_device_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
| 428 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 429 | * platform_device_unregister - unregister a platform-level device |
| 430 | * @pdev: platform device we're unregistering |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 432 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 436 | void platform_device_unregister(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | { |
Dmitry Torokhov | 93ce3061 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 438 | platform_device_del(pdev); |
| 439 | platform_device_put(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 441 | EXPORT_SYMBOL_GPL(platform_device_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | /** |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 444 | * platform_device_register_full - add a platform-level device with |
Uwe Kleine-König | 44f28bd | 2010-06-21 16:11:44 +0200 | [diff] [blame] | 445 | * resources and platform-specific data |
| 446 | * |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 447 | * @pdevinfo: data used to create device |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 448 | * |
Jani Nikula | f0eae0e | 2010-03-11 18:11:45 +0200 | [diff] [blame] | 449 | * Returns &struct platform_device pointer on success, or ERR_PTR() on error. |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 450 | */ |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 451 | struct platform_device *platform_device_register_full( |
Uwe Kleine-König | 5a3072b | 2011-12-08 22:53:29 +0100 | [diff] [blame] | 452 | const struct platform_device_info *pdevinfo) |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 453 | { |
Uwe Kleine-König | 44f28bd | 2010-06-21 16:11:44 +0200 | [diff] [blame] | 454 | int ret = -ENOMEM; |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 455 | struct platform_device *pdev; |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 456 | |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 457 | pdev = platform_device_alloc(pdevinfo->name, pdevinfo->id); |
Uwe Kleine-König | 44f28bd | 2010-06-21 16:11:44 +0200 | [diff] [blame] | 458 | if (!pdev) |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 459 | goto err_alloc; |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 460 | |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 461 | pdev->dev.parent = pdevinfo->parent; |
Rafael J. Wysocki | ce79348 | 2015-03-16 23:49:03 +0100 | [diff] [blame] | 462 | pdev->dev.fwnode = pdevinfo->fwnode; |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 463 | |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 464 | 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 Vorontsov | 807508c | 2010-09-07 17:31:54 +0400 | [diff] [blame] | 482 | if (ret) |
| 483 | goto err; |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 484 | |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 485 | ret = platform_device_add_data(pdev, |
| 486 | pdevinfo->data, pdevinfo->size_data); |
Anton Vorontsov | 807508c | 2010-09-07 17:31:54 +0400 | [diff] [blame] | 487 | if (ret) |
| 488 | goto err; |
Uwe Kleine-König | 44f28bd | 2010-06-21 16:11:44 +0200 | [diff] [blame] | 489 | |
| 490 | ret = platform_device_add(pdev); |
| 491 | if (ret) { |
| 492 | err: |
Rafael J. Wysocki | 7b19981 | 2013-11-11 22:41:56 +0100 | [diff] [blame] | 493 | ACPI_COMPANION_SET(&pdev->dev, NULL); |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 494 | kfree(pdev->dev.dma_mask); |
| 495 | |
| 496 | err_alloc: |
Uwe Kleine-König | 44f28bd | 2010-06-21 16:11:44 +0200 | [diff] [blame] | 497 | platform_device_put(pdev); |
| 498 | return ERR_PTR(ret); |
| 499 | } |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 500 | |
| 501 | return pdev; |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 502 | } |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 503 | EXPORT_SYMBOL_GPL(platform_device_register_full); |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 504 | |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 505 | static 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. Wysocki | 94d76d5 | 2012-11-26 10:04:53 +0100 | [diff] [blame] | 509 | int ret; |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 510 | |
Sylwester Nawrocki | 86be408 | 2014-06-18 17:29:32 +0200 | [diff] [blame] | 511 | ret = of_clk_set_defaults(_dev->of_node, false); |
| 512 | if (ret < 0) |
| 513 | return ret; |
| 514 | |
Ulf Hansson | cb51841 | 2014-09-19 20:27:38 +0200 | [diff] [blame] | 515 | 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. Wysocki | 94d76d5 | 2012-11-26 10:04:53 +0100 | [diff] [blame] | 521 | |
Johan Hovold | 3f9120b | 2013-09-23 16:27:26 +0200 | [diff] [blame] | 522 | if (drv->prevent_deferred_probe && ret == -EPROBE_DEFER) { |
| 523 | dev_warn(_dev, "probe deferral not supported\n"); |
| 524 | ret = -ENXIO; |
| 525 | } |
| 526 | |
Rafael J. Wysocki | 94d76d5 | 2012-11-26 10:04:53 +0100 | [diff] [blame] | 527 | return ret; |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 528 | } |
| 529 | |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 530 | static int platform_drv_probe_fail(struct device *_dev) |
| 531 | { |
| 532 | return -ENXIO; |
| 533 | } |
| 534 | |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 535 | static 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. Wysocki | 94d76d5 | 2012-11-26 10:04:53 +0100 | [diff] [blame] | 539 | int ret; |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 540 | |
Rafael J. Wysocki | 94d76d5 | 2012-11-26 10:04:53 +0100 | [diff] [blame] | 541 | ret = drv->remove(dev); |
Ulf Hansson | cb51841 | 2014-09-19 20:27:38 +0200 | [diff] [blame] | 542 | dev_pm_domain_detach(_dev, true); |
Rafael J. Wysocki | 94d76d5 | 2012-11-26 10:04:53 +0100 | [diff] [blame] | 543 | |
| 544 | return ret; |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 545 | } |
| 546 | |
| 547 | static 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 Hansson | cb51841 | 2014-09-19 20:27:38 +0200 | [diff] [blame] | 553 | dev_pm_domain_detach(_dev, true); |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 554 | } |
| 555 | |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 556 | /** |
Libo Chen | 9447057 | 2013-05-25 12:40:50 +0800 | [diff] [blame] | 557 | * __platform_driver_register - register a driver for platform-level devices |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 558 | * @drv: platform driver structure |
Randy Dunlap | 08801f9 | 2013-07-14 17:43:06 -0700 | [diff] [blame] | 559 | * @owner: owning module/driver |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 560 | */ |
Libo Chen | 9447057 | 2013-05-25 12:40:50 +0800 | [diff] [blame] | 561 | int __platform_driver_register(struct platform_driver *drv, |
| 562 | struct module *owner) |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 563 | { |
Libo Chen | 9447057 | 2013-05-25 12:40:50 +0800 | [diff] [blame] | 564 | drv->driver.owner = owner; |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 565 | 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 Damm | 783ea7d | 2009-06-04 22:13:33 +0200 | [diff] [blame] | 572 | |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 573 | return driver_register(&drv->driver); |
| 574 | } |
Libo Chen | 9447057 | 2013-05-25 12:40:50 +0800 | [diff] [blame] | 575 | EXPORT_SYMBOL_GPL(__platform_driver_register); |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 576 | |
| 577 | /** |
Ben Hutchings | 3c31f07 | 2010-02-14 14:18:53 +0000 | [diff] [blame] | 578 | * platform_driver_unregister - unregister a driver for platform-level devices |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 579 | * @drv: platform driver structure |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 580 | */ |
| 581 | void platform_driver_unregister(struct platform_driver *drv) |
| 582 | { |
| 583 | driver_unregister(&drv->driver); |
| 584 | } |
| 585 | EXPORT_SYMBOL_GPL(platform_driver_unregister); |
| 586 | |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 587 | /** |
Wolfram Sang | c3b50dc | 2014-10-28 17:40:41 +0100 | [diff] [blame] | 588 | * __platform_driver_probe - register driver for non-hotpluggable device |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 589 | * @drv: platform driver structure |
Johan Hovold | 3f9120b | 2013-09-23 16:27:26 +0200 | [diff] [blame] | 590 | * @probe: the driver probe routine, probably from an __init section |
Wolfram Sang | c3b50dc | 2014-10-28 17:40:41 +0100 | [diff] [blame] | 591 | * @module: module which will be the owner of the driver |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 592 | * |
| 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 Hovold | 3f9120b | 2013-09-23 16:27:26 +0200 | [diff] [blame] | 602 | * Note that this is incompatible with deferred probing. |
Fabio Porcedda | 647c86d | 2013-03-26 10:35:15 +0100 | [diff] [blame] | 603 | * |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 604 | * 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 Sang | c3b50dc | 2014-10-28 17:40:41 +0100 | [diff] [blame] | 607 | int __init_or_module __platform_driver_probe(struct platform_driver *drv, |
| 608 | int (*probe)(struct platform_device *), struct module *module) |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 609 | { |
| 610 | int retval, code; |
| 611 | |
Dmitry Torokhov | 5c36eb2 | 2015-03-30 16:20:07 -0700 | [diff] [blame] | 612 | 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 Hovold | 3f9120b | 2013-09-23 16:27:26 +0200 | [diff] [blame] | 625 | /* |
| 626 | * Prevent driver from requesting probe deferral to avoid further |
| 627 | * futile probe attempts. |
| 628 | */ |
| 629 | drv->prevent_deferred_probe = true; |
| 630 | |
Dmitry Torokhov | 1a6f2a7 | 2009-10-12 20:17:41 -0700 | [diff] [blame] | 631 | /* make sure driver won't have bind/unbind attributes */ |
| 632 | drv->driver.suppress_bind_attrs = true; |
| 633 | |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 634 | /* temporary section violation during probe() */ |
| 635 | drv->probe = probe; |
Wolfram Sang | c3b50dc | 2014-10-28 17:40:41 +0100 | [diff] [blame] | 636 | retval = code = __platform_driver_register(drv, module); |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 637 | |
Dmitry Torokhov | 1a6f2a7 | 2009-10-12 20:17:41 -0700 | [diff] [blame] | 638 | /* |
| 639 | * Fixup that section violation, being paranoid about code scanning |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 640 | * 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 Pannuto | d79d324 | 2010-08-06 17:12:41 -0700 | [diff] [blame] | 644 | spin_lock(&drv->driver.bus->p->klist_drivers.k_lock); |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 645 | drv->probe = NULL; |
Greg Kroah-Hartman | e5dd127 | 2007-11-28 15:59:15 -0800 | [diff] [blame] | 646 | if (code == 0 && list_empty(&drv->driver.p->klist_devices.k_list)) |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 647 | retval = -ENODEV; |
| 648 | drv->driver.probe = platform_drv_probe_fail; |
Patrick Pannuto | d79d324 | 2010-08-06 17:12:41 -0700 | [diff] [blame] | 649 | spin_unlock(&drv->driver.bus->p->klist_drivers.k_lock); |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 650 | |
| 651 | if (code != retval) |
| 652 | platform_driver_unregister(drv); |
| 653 | return retval; |
| 654 | } |
Wolfram Sang | c3b50dc | 2014-10-28 17:40:41 +0100 | [diff] [blame] | 655 | EXPORT_SYMBOL_GPL(__platform_driver_probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 657 | /** |
Wolfram Sang | 291f653 | 2014-10-28 17:40:42 +0100 | [diff] [blame] | 658 | * __platform_create_bundle - register driver and create corresponding device |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 659 | * @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 Sang | 291f653 | 2014-10-28 17:40:42 +0100 | [diff] [blame] | 665 | * @module: module which will be the owner of the driver |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 666 | * |
| 667 | * Use this in legacy-style modules that probe hardware directly and |
| 668 | * register a single platform device and corresponding platform driver. |
Jani Nikula | f0eae0e | 2010-03-11 18:11:45 +0200 | [diff] [blame] | 669 | * |
| 670 | * Returns &struct platform_device pointer on success, or ERR_PTR() on error. |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 671 | */ |
Wolfram Sang | 291f653 | 2014-10-28 17:40:42 +0100 | [diff] [blame] | 672 | struct platform_device * __init_or_module __platform_create_bundle( |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 673 | struct platform_driver *driver, |
| 674 | int (*probe)(struct platform_device *), |
| 675 | struct resource *res, unsigned int n_res, |
Wolfram Sang | 291f653 | 2014-10-28 17:40:42 +0100 | [diff] [blame] | 676 | const void *data, size_t size, struct module *module) |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 677 | { |
| 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 Vorontsov | 807508c | 2010-09-07 17:31:54 +0400 | [diff] [blame] | 687 | error = platform_device_add_resources(pdev, res, n_res); |
| 688 | if (error) |
| 689 | goto err_pdev_put; |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 690 | |
Anton Vorontsov | 807508c | 2010-09-07 17:31:54 +0400 | [diff] [blame] | 691 | error = platform_device_add_data(pdev, data, size); |
| 692 | if (error) |
| 693 | goto err_pdev_put; |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 694 | |
| 695 | error = platform_device_add(pdev); |
| 696 | if (error) |
| 697 | goto err_pdev_put; |
| 698 | |
Wolfram Sang | 291f653 | 2014-10-28 17:40:42 +0100 | [diff] [blame] | 699 | error = __platform_driver_probe(driver, probe, module); |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 700 | if (error) |
| 701 | goto err_pdev_del; |
| 702 | |
| 703 | return pdev; |
| 704 | |
| 705 | err_pdev_del: |
| 706 | platform_device_del(pdev); |
| 707 | err_pdev_put: |
| 708 | platform_device_put(pdev); |
| 709 | err_out: |
| 710 | return ERR_PTR(error); |
| 711 | } |
Wolfram Sang | 291f653 | 2014-10-28 17:40:42 +0100 | [diff] [blame] | 712 | EXPORT_SYMBOL_GPL(__platform_create_bundle); |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 713 | |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 714 | /* 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-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 720 | static ssize_t modalias_show(struct device *dev, struct device_attribute *a, |
| 721 | char *buf) |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 722 | { |
| 723 | struct platform_device *pdev = to_platform_device(dev); |
Zhang Rui | 8c4ff6d | 2014-01-14 16:46:37 +0800 | [diff] [blame] | 724 | int len; |
| 725 | |
Zhang Rui | b9f7306 | 2014-01-14 16:46:38 +0800 | [diff] [blame] | 726 | len = of_device_get_modalias(dev, buf, PAGE_SIZE -1); |
| 727 | if (len != -ENODEV) |
| 728 | return len; |
| 729 | |
Zhang Rui | 8c4ff6d | 2014-01-14 16:46:37 +0800 | [diff] [blame] | 730 | 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 Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 735 | |
| 736 | return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; |
| 737 | } |
Greg Kroah-Hartman | d06262e | 2013-08-23 14:24:37 -0700 | [diff] [blame] | 738 | static DEVICE_ATTR_RO(modalias); |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 739 | |
Kim Phillips | 3d713e0 | 2014-06-02 19:42:58 -0500 | [diff] [blame] | 740 | static 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 | |
| 770 | static 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 | } |
| 777 | static DEVICE_ATTR_RW(driver_override); |
| 778 | |
| 779 | |
Greg Kroah-Hartman | d06262e | 2013-08-23 14:24:37 -0700 | [diff] [blame] | 780 | static struct attribute *platform_dev_attrs[] = { |
| 781 | &dev_attr_modalias.attr, |
Kim Phillips | 3d713e0 | 2014-06-02 19:42:58 -0500 | [diff] [blame] | 782 | &dev_attr_driver_override.attr, |
Greg Kroah-Hartman | d06262e | 2013-08-23 14:24:37 -0700 | [diff] [blame] | 783 | NULL, |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 784 | }; |
Greg Kroah-Hartman | d06262e | 2013-08-23 14:24:37 -0700 | [diff] [blame] | 785 | ATTRIBUTE_GROUPS(platform_dev); |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 786 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 787 | static int platform_uevent(struct device *dev, struct kobj_uevent_env *env) |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 788 | { |
| 789 | struct platform_device *pdev = to_platform_device(dev); |
Grant Likely | eca3930 | 2010-06-08 07:48:21 -0600 | [diff] [blame] | 790 | int rc; |
| 791 | |
| 792 | /* Some devices have extra OF data and an OF-style MODALIAS */ |
Fabio Porcedda | 0258e18 | 2013-03-26 10:35:16 +0100 | [diff] [blame] | 793 | rc = of_device_uevent_modalias(dev, env); |
Grant Likely | eca3930 | 2010-06-08 07:48:21 -0600 | [diff] [blame] | 794 | if (rc != -ENODEV) |
| 795 | return rc; |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 796 | |
Zhang Rui | 8c4ff6d | 2014-01-14 16:46:37 +0800 | [diff] [blame] | 797 | rc = acpi_device_uevent_modalias(dev, env); |
| 798 | if (rc != -ENODEV) |
| 799 | return rc; |
| 800 | |
Eric Miao | 57fee4a | 2009-02-04 11:52:40 +0800 | [diff] [blame] | 801 | add_uevent_var(env, "MODALIAS=%s%s", PLATFORM_MODULE_PREFIX, |
Sebastian Andrzej Siewior | 0a26813 | 2011-08-15 16:51:22 +0200 | [diff] [blame] | 802 | pdev->name); |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 803 | return 0; |
| 804 | } |
| 805 | |
Eric Miao | 57fee4a | 2009-02-04 11:52:40 +0800 | [diff] [blame] | 806 | static const struct platform_device_id *platform_match_id( |
Uwe Kleine-König | 831fad2 | 2010-01-26 09:35:00 +0100 | [diff] [blame] | 807 | const struct platform_device_id *id, |
Eric Miao | 57fee4a | 2009-02-04 11:52:40 +0800 | [diff] [blame] | 808 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 821 | * platform_match - bind platform device to platform driver. |
| 822 | * @dev: device. |
| 823 | * @drv: driver. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 825 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 833 | static int platform_match(struct device *dev, struct device_driver *drv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | { |
Eric Miao | 71b3e0c | 2009-01-31 22:47:44 +0800 | [diff] [blame] | 835 | struct platform_device *pdev = to_platform_device(dev); |
Eric Miao | 57fee4a | 2009-02-04 11:52:40 +0800 | [diff] [blame] | 836 | struct platform_driver *pdrv = to_platform_driver(drv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | |
Kim Phillips | 3d713e0 | 2014-06-02 19:42:58 -0500 | [diff] [blame] | 838 | /* 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 Likely | 0521215 | 2010-06-08 07:48:20 -0600 | [diff] [blame] | 842 | /* Attempt an OF style match first */ |
| 843 | if (of_driver_match_device(dev, drv)) |
| 844 | return 1; |
| 845 | |
Mika Westerberg | 91e5687 | 2012-10-31 22:45:02 +0100 | [diff] [blame] | 846 | /* Then try ACPI style match */ |
| 847 | if (acpi_driver_match_device(dev, drv)) |
| 848 | return 1; |
| 849 | |
Grant Likely | 0521215 | 2010-06-08 07:48:20 -0600 | [diff] [blame] | 850 | /* Then try to match against the id table */ |
Eric Miao | 57fee4a | 2009-02-04 11:52:40 +0800 | [diff] [blame] | 851 | if (pdrv->id_table) |
| 852 | return platform_match_id(pdrv->id_table, pdev) != NULL; |
| 853 | |
| 854 | /* fall-back to driver name match */ |
Kay Sievers | 1e0b2cf | 2008-10-30 01:36:48 +0100 | [diff] [blame] | 855 | return (strcmp(pdev->name, drv->name) == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | } |
| 857 | |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 858 | #ifdef CONFIG_PM_SLEEP |
| 859 | |
| 860 | static int platform_legacy_suspend(struct device *dev, pm_message_t mesg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | { |
Magnus Damm | 783ea7d | 2009-06-04 22:13:33 +0200 | [diff] [blame] | 862 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
| 863 | struct platform_device *pdev = to_platform_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | int ret = 0; |
| 865 | |
Magnus Damm | 783ea7d | 2009-06-04 22:13:33 +0200 | [diff] [blame] | 866 | if (dev->driver && pdrv->suspend) |
| 867 | ret = pdrv->suspend(pdev, mesg); |
David Brownell | 386415d8 | 2006-09-03 13:16:45 -0700 | [diff] [blame] | 868 | |
| 869 | return ret; |
| 870 | } |
| 871 | |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 872 | static int platform_legacy_resume(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | { |
Magnus Damm | 783ea7d | 2009-06-04 22:13:33 +0200 | [diff] [blame] | 874 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
| 875 | struct platform_device *pdev = to_platform_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | int ret = 0; |
| 877 | |
Magnus Damm | 783ea7d | 2009-06-04 22:13:33 +0200 | [diff] [blame] | 878 | if (dev->driver && pdrv->resume) |
| 879 | ret = pdrv->resume(pdev); |
Russell King | 9480e30 | 2005-10-28 09:52:56 -0700 | [diff] [blame] | 880 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | return ret; |
| 882 | } |
| 883 | |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 884 | #endif /* CONFIG_PM_SLEEP */ |
Magnus Damm | 9d73022 | 2009-08-20 20:25:32 +0200 | [diff] [blame] | 885 | |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 886 | #ifdef CONFIG_SUSPEND |
| 887 | |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 888 | int platform_pm_suspend(struct device *dev) |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 889 | { |
| 890 | struct device_driver *drv = dev->driver; |
| 891 | int ret = 0; |
| 892 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 893 | if (!drv) |
| 894 | return 0; |
| 895 | |
| 896 | if (drv->pm) { |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 897 | 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. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 906 | int platform_pm_resume(struct device *dev) |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 907 | { |
| 908 | struct device_driver *drv = dev->driver; |
| 909 | int ret = 0; |
| 910 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 911 | if (!drv) |
| 912 | return 0; |
| 913 | |
| 914 | if (drv->pm) { |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 915 | 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. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 924 | #endif /* CONFIG_SUSPEND */ |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 925 | |
Rafael J. Wysocki | 1f112ce | 2011-04-11 22:54:42 +0200 | [diff] [blame] | 926 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 927 | |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 928 | int platform_pm_freeze(struct device *dev) |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 929 | { |
| 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. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 946 | int platform_pm_thaw(struct device *dev) |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 947 | { |
| 948 | struct device_driver *drv = dev->driver; |
| 949 | int ret = 0; |
| 950 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 951 | if (!drv) |
| 952 | return 0; |
| 953 | |
| 954 | if (drv->pm) { |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 955 | 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. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 964 | int platform_pm_poweroff(struct device *dev) |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 965 | { |
| 966 | struct device_driver *drv = dev->driver; |
| 967 | int ret = 0; |
| 968 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 969 | if (!drv) |
| 970 | return 0; |
| 971 | |
| 972 | if (drv->pm) { |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 973 | 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. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 982 | int platform_pm_restore(struct device *dev) |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 983 | { |
| 984 | struct device_driver *drv = dev->driver; |
| 985 | int ret = 0; |
| 986 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 987 | if (!drv) |
| 988 | return 0; |
| 989 | |
| 990 | if (drv->pm) { |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 991 | 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. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 1000 | #endif /* CONFIG_HIBERNATE_CALLBACKS */ |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 1001 | |
Dmitry Torokhov | d9ab771 | 2009-07-22 00:37:25 +0200 | [diff] [blame] | 1002 | static const struct dev_pm_ops platform_dev_pm_ops = { |
Rafael J. Wysocki | 8b313a3 | 2011-04-29 00:36:32 +0200 | [diff] [blame] | 1003 | .runtime_suspend = pm_generic_runtime_suspend, |
| 1004 | .runtime_resume = pm_generic_runtime_resume, |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 1005 | USE_PLATFORM_PM_SLEEP_OPS |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 1006 | }; |
| 1007 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | struct bus_type platform_bus_type = { |
| 1009 | .name = "platform", |
Greg Kroah-Hartman | d06262e | 2013-08-23 14:24:37 -0700 | [diff] [blame] | 1010 | .dev_groups = platform_dev_groups, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | .match = platform_match, |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 1012 | .uevent = platform_uevent, |
Magnus Damm | 9d73022 | 2009-08-20 20:25:32 +0200 | [diff] [blame] | 1013 | .pm = &platform_dev_pm_ops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | }; |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 1015 | EXPORT_SYMBOL_GPL(platform_bus_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | |
| 1017 | int __init platform_bus_init(void) |
| 1018 | { |
Cornelia Huck | fbfb144 | 2006-11-27 10:35:08 +0100 | [diff] [blame] | 1019 | int error; |
| 1020 | |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1021 | early_platform_cleanup(); |
| 1022 | |
Cornelia Huck | fbfb144 | 2006-11-27 10:35:08 +0100 | [diff] [blame] | 1023 | 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 Antoniou | 801d728 | 2014-10-28 22:36:01 +0200 | [diff] [blame] | 1029 | of_platform_register_reconfig_notifier(); |
Cornelia Huck | fbfb144 | 2006-11-27 10:35:08 +0100 | [diff] [blame] | 1030 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | } |
| 1032 | |
| 1033 | #ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK |
| 1034 | u64 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 Bottomley | e88a0c2 | 2008-03-09 11:57:56 -0500 | [diff] [blame] | 1050 | return mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | } |
| 1052 | EXPORT_SYMBOL_GPL(dma_get_required_mask); |
| 1053 | #endif |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1054 | |
| 1055 | static __initdata LIST_HEAD(early_platform_driver_list); |
| 1056 | static __initdata LIST_HEAD(early_platform_device_list); |
| 1057 | |
| 1058 | /** |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1059 | * early_platform_driver_register - register early platform driver |
Randy Dunlap | d86c130 | 2009-04-21 07:22:53 -0700 | [diff] [blame] | 1060 | * @epdrv: early_platform driver structure |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1061 | * @buf: string passed from early_param() |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1062 | * |
| 1063 | * Helper function for early_platform_init() / early_platform_init_buffer() |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1064 | */ |
| 1065 | int __init early_platform_driver_register(struct early_platform_driver *epdrv, |
| 1066 | char *buf) |
| 1067 | { |
Magnus Damm | c60e050 | 2009-11-27 17:38:51 +0900 | [diff] [blame] | 1068 | char *tmp; |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1069 | 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 Damm | c60e050 | 2009-11-27 17:38:51 +0900 | [diff] [blame] | 1087 | /* Allow passing parameters after device name */ |
| 1088 | if (buf[n] == '\0' || buf[n] == ',') |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1089 | epdrv->requested_id = -1; |
Magnus Damm | c60e050 | 2009-11-27 17:38:51 +0900 | [diff] [blame] | 1090 | 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 Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1109 | } |
| 1110 | |
| 1111 | return 0; |
| 1112 | } |
| 1113 | |
| 1114 | /** |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1115 | * early_platform_add_devices - adds a number of early platform devices |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1116 | * @devs: array of early platform devices to add |
| 1117 | * @num: number of early platform devices in array |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1118 | * |
| 1119 | * Used by early architecture code to register early platform devices and |
| 1120 | * their platform data. |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1121 | */ |
| 1122 | void __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. Wysocki | bed2b42 | 2012-08-06 01:45:11 +0200 | [diff] [blame] | 1132 | pm_runtime_early_init(dev); |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1133 | INIT_LIST_HEAD(&dev->devres_head); |
| 1134 | list_add_tail(&dev->devres_head, |
| 1135 | &early_platform_device_list); |
| 1136 | } |
| 1137 | } |
| 1138 | } |
| 1139 | |
| 1140 | /** |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1141 | * early_platform_driver_register_all - register early platform drivers |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1142 | * @class_str: string to identify early platform driver class |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1143 | * |
| 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 Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1147 | */ |
| 1148 | void __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 Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1168 | * early_platform_match - find early platform device matching driver |
Randy Dunlap | d86c130 | 2009-04-21 07:22:53 -0700 | [diff] [blame] | 1169 | * @epdrv: early platform driver structure |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1170 | * @id: id to match against |
| 1171 | */ |
Hanjun Guo | a825791 | 2013-08-17 20:42:25 +0800 | [diff] [blame] | 1172 | static struct platform_device * __init |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1173 | early_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 Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1186 | * early_platform_left - check if early platform driver has matching devices |
Randy Dunlap | d86c130 | 2009-04-21 07:22:53 -0700 | [diff] [blame] | 1187 | * @epdrv: early platform driver structure |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1188 | * @id: return true if id or above exists |
| 1189 | */ |
Hanjun Guo | a825791 | 2013-08-17 20:42:25 +0800 | [diff] [blame] | 1190 | static int __init early_platform_left(struct early_platform_driver *epdrv, |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1191 | 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 Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1204 | * early_platform_driver_probe_id - probe drivers matching class_str and id |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1205 | * @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 | */ |
| 1209 | static 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 Porcedda | 0258e18 | 2013-03-26 10:35:16 +0100 | [diff] [blame] | 1245 | pr_warn("%s: unable to parse %s parameter\n", |
| 1246 | class_str, epdrv->pdrv->driver.name); |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1247 | /* 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 Mundt | a636ee7 | 2010-03-09 06:57:53 +0000 | [diff] [blame] | 1256 | /* |
| 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 Mundt | 06fe53b | 2010-05-13 17:56:56 +0900 | [diff] [blame] | 1261 | if (!match->dev.init_name && slab_is_available()) { |
Paul Mundt | a636ee7 | 2010-03-09 06:57:53 +0000 | [diff] [blame] | 1262 | if (match->id != -1) |
Paul Mundt | bd05086 | 2010-03-29 15:51:35 +0900 | [diff] [blame] | 1263 | match->dev.init_name = |
| 1264 | kasprintf(GFP_KERNEL, "%s.%d", |
| 1265 | match->name, |
| 1266 | match->id); |
Paul Mundt | a636ee7 | 2010-03-09 06:57:53 +0000 | [diff] [blame] | 1267 | else |
Paul Mundt | bd05086 | 2010-03-29 15:51:35 +0900 | [diff] [blame] | 1268 | match->dev.init_name = |
| 1269 | kasprintf(GFP_KERNEL, "%s", |
| 1270 | match->name); |
Paul Mundt | a636ee7 | 2010-03-09 06:57:53 +0000 | [diff] [blame] | 1271 | |
Paul Mundt | a636ee7 | 2010-03-09 06:57:53 +0000 | [diff] [blame] | 1272 | if (!match->dev.init_name) |
| 1273 | return -ENOMEM; |
| 1274 | } |
Paul Mundt | bd05086 | 2010-03-29 15:51:35 +0900 | [diff] [blame] | 1275 | |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1276 | if (epdrv->pdrv->probe(match)) |
Fabio Porcedda | 0258e18 | 2013-03-26 10:35:16 +0100 | [diff] [blame] | 1277 | pr_warn("%s: unable to probe %s early.\n", |
| 1278 | class_str, match->name); |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1279 | 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 Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1294 | * early_platform_driver_probe - probe a class of registered drivers |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1295 | * @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 Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1298 | * |
| 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 Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1302 | */ |
| 1303 | int __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 | */ |
| 1328 | void __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 | |