Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * pnpacpi -- PnP ACPI driver |
| 3 | * |
| 4 | * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr> |
| 5 | * Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com> |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 6 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License as published by the |
| 9 | * Free Software Foundation; either version 2, or (at your option) any |
| 10 | * later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, but |
| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/acpi.h> |
| 23 | #include <linux/pnp.h> |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 24 | #include <linux/mod_devicetable.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <acpi/acpi_bus.h> |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 26 | #include <acpi/actypes.h> |
| 27 | |
Bjorn Helgaas | 1692b27b | 2008-04-28 16:33:51 -0600 | [diff] [blame] | 28 | #include "../base.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include "pnpacpi.h" |
| 30 | |
| 31 | static int num = 0; |
| 32 | |
matthieu castet | c4bb6f5 | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 33 | /* We need only to blacklist devices that have already an acpi driver that |
| 34 | * can't use pnp layer. We don't need to blacklist device that are directly |
| 35 | * used by the kernel (PCI root, ...), as it is harmless and there were |
| 36 | * already present in pnpbios. But there is an exception for devices that |
| 37 | * have irqs (PIC, Timer) because we call acpi_register_gsi. |
Bjorn Helgaas | 07d4e9a | 2007-07-26 10:41:21 -0700 | [diff] [blame] | 38 | * Finally, only devices that have a CRS method need to be in this list. |
matthieu castet | c4bb6f5 | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 39 | */ |
Roel Kluin | 6bf69b5 | 2008-02-11 16:05:35 +0100 | [diff] [blame] | 40 | static struct acpi_device_id excluded_id_list[] __initdata = { |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 41 | {"PNP0C09", 0}, /* EC */ |
| 42 | {"PNP0C0F", 0}, /* Link device */ |
| 43 | {"PNP0000", 0}, /* PIC */ |
| 44 | {"PNP0100", 0}, /* Timer */ |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 45 | {"", 0}, |
| 46 | }; |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | static inline int is_exclusive_device(struct acpi_device *dev) |
| 49 | { |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 50 | return (!acpi_match_device_ids(dev, excluded_id_list)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | } |
| 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | /* |
| 54 | * Compatible Device IDs |
| 55 | */ |
| 56 | #define TEST_HEX(c) \ |
| 57 | if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \ |
| 58 | return 0 |
| 59 | #define TEST_ALPHA(c) \ |
| 60 | if (!('@' <= (c) || (c) <= 'Z')) \ |
| 61 | return 0 |
| 62 | static int __init ispnpidacpi(char *id) |
| 63 | { |
| 64 | TEST_ALPHA(id[0]); |
| 65 | TEST_ALPHA(id[1]); |
| 66 | TEST_ALPHA(id[2]); |
| 67 | TEST_HEX(id[3]); |
| 68 | TEST_HEX(id[4]); |
| 69 | TEST_HEX(id[5]); |
| 70 | TEST_HEX(id[6]); |
| 71 | if (id[7] != '\0') |
| 72 | return 0; |
| 73 | return 1; |
| 74 | } |
| 75 | |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 76 | static int pnpacpi_get_resources(struct pnp_dev *dev, |
| 77 | struct pnp_resource_table *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | { |
| 79 | acpi_status status; |
Bjorn Helgaas | 07d4e9a | 2007-07-26 10:41:21 -0700 | [diff] [blame] | 80 | |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 81 | status = pnpacpi_parse_allocated_resource((acpi_handle) dev->data, |
| 82 | &dev->res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | return ACPI_FAILURE(status) ? -ENODEV : 0; |
| 84 | } |
| 85 | |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 86 | static int pnpacpi_set_resources(struct pnp_dev *dev, |
| 87 | struct pnp_resource_table *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | { |
| 89 | acpi_handle handle = dev->data; |
| 90 | struct acpi_buffer buffer; |
| 91 | int ret = 0; |
| 92 | acpi_status status; |
| 93 | |
| 94 | ret = pnpacpi_build_resource_template(handle, &buffer); |
| 95 | if (ret) |
| 96 | return ret; |
| 97 | ret = pnpacpi_encode_resources(res, &buffer); |
| 98 | if (ret) { |
| 99 | kfree(buffer.pointer); |
| 100 | return ret; |
| 101 | } |
| 102 | status = acpi_set_current_resources(handle, &buffer); |
| 103 | if (ACPI_FAILURE(status)) |
| 104 | ret = -EINVAL; |
| 105 | kfree(buffer.pointer); |
| 106 | return ret; |
| 107 | } |
| 108 | |
| 109 | static int pnpacpi_disable_resources(struct pnp_dev *dev) |
| 110 | { |
| 111 | acpi_status status; |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | /* acpi_unregister_gsi(pnp_irq(dev, 0)); */ |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 114 | status = acpi_evaluate_object((acpi_handle) dev->data, |
| 115 | "_DIS", NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | return ACPI_FAILURE(status) ? -ENODEV : 0; |
| 117 | } |
| 118 | |
Len Brown | 673d5b4 | 2007-07-28 03:33:16 -0400 | [diff] [blame] | 119 | #ifdef CONFIG_ACPI_SLEEP |
Shaohua Li | fc30e68 | 2007-07-20 10:03:20 +0800 | [diff] [blame] | 120 | static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state) |
| 121 | { |
Rafael J. Wysocki | 36e02b6 | 2007-10-16 23:31:06 -0700 | [diff] [blame] | 122 | int power_state; |
| 123 | |
| 124 | power_state = acpi_pm_device_sleep_state(&dev->dev, |
| 125 | device_may_wakeup(&dev->dev), |
| 126 | NULL); |
| 127 | if (power_state < 0) |
| 128 | power_state = (state.event == PM_EVENT_ON) ? |
| 129 | ACPI_STATE_D0 : ACPI_STATE_D3; |
| 130 | |
| 131 | return acpi_bus_set_power((acpi_handle) dev->data, power_state); |
Shaohua Li | fc30e68 | 2007-07-20 10:03:20 +0800 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | static int pnpacpi_resume(struct pnp_dev *dev) |
| 135 | { |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 136 | return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0); |
Shaohua Li | fc30e68 | 2007-07-20 10:03:20 +0800 | [diff] [blame] | 137 | } |
Len Brown | 673d5b4 | 2007-07-28 03:33:16 -0400 | [diff] [blame] | 138 | #endif |
Shaohua Li | fc30e68 | 2007-07-20 10:03:20 +0800 | [diff] [blame] | 139 | |
Adrian Bunk | b449f63 | 2005-11-07 01:01:48 -0800 | [diff] [blame] | 140 | static struct pnp_protocol pnpacpi_protocol = { |
Bjorn Helgaas | 07d4e9a | 2007-07-26 10:41:21 -0700 | [diff] [blame] | 141 | .name = "Plug and Play ACPI", |
| 142 | .get = pnpacpi_get_resources, |
| 143 | .set = pnpacpi_set_resources, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | .disable = pnpacpi_disable_resources, |
Len Brown | 673d5b4 | 2007-07-28 03:33:16 -0400 | [diff] [blame] | 145 | #ifdef CONFIG_ACPI_SLEEP |
Shaohua Li | fc30e68 | 2007-07-20 10:03:20 +0800 | [diff] [blame] | 146 | .suspend = pnpacpi_suspend, |
| 147 | .resume = pnpacpi_resume, |
Len Brown | 673d5b4 | 2007-07-28 03:33:16 -0400 | [diff] [blame] | 148 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | }; |
| 150 | |
| 151 | static int __init pnpacpi_add_device(struct acpi_device *device) |
| 152 | { |
| 153 | acpi_handle temp = NULL; |
| 154 | acpi_status status; |
| 155 | struct pnp_id *dev_id; |
| 156 | struct pnp_dev *dev; |
| 157 | |
matthieu castet | 07b0120 | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 158 | status = acpi_get_handle(device->handle, "_CRS", &temp); |
| 159 | if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) || |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 160 | is_exclusive_device(device)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | return 0; |
| 162 | |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 163 | dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | if (!dev) { |
| 165 | pnp_err("Out of memory"); |
| 166 | return -ENOMEM; |
| 167 | } |
| 168 | dev->data = device->handle; |
Bjorn Helgaas | 07d4e9a | 2007-07-26 10:41:21 -0700 | [diff] [blame] | 169 | /* .enabled means the device can decode the resources */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | dev->active = device->status.enabled; |
| 171 | status = acpi_get_handle(device->handle, "_SRS", &temp); |
| 172 | if (ACPI_SUCCESS(status)) |
| 173 | dev->capabilities |= PNP_CONFIGURABLE; |
| 174 | dev->capabilities |= PNP_READ; |
Shaohua Li | 856608e | 2008-01-12 19:37:49 -0500 | [diff] [blame] | 175 | if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | dev->capabilities |= PNP_WRITE; |
| 177 | if (device->flags.removable) |
| 178 | dev->capabilities |= PNP_REMOVABLE; |
| 179 | status = acpi_get_handle(device->handle, "_DIS", &temp); |
| 180 | if (ACPI_SUCCESS(status)) |
| 181 | dev->capabilities |= PNP_DISABLE; |
| 182 | |
| 183 | dev->protocol = &pnpacpi_protocol; |
| 184 | |
| 185 | if (strlen(acpi_device_name(device))) |
| 186 | strncpy(dev->name, acpi_device_name(device), sizeof(dev->name)); |
| 187 | else |
| 188 | strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name)); |
| 189 | |
| 190 | dev->number = num; |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 191 | |
Bjorn Helgaas | 772defc | 2008-04-28 16:33:52 -0600 | [diff] [blame] | 192 | dev_id = pnp_add_id(dev, acpi_device_hid(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | if (!dev_id) |
| 194 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 196 | if (dev->active) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | /* parse allocated resource */ |
Bjorn Helgaas | 07d4e9a | 2007-07-26 10:41:21 -0700 | [diff] [blame] | 198 | status = pnpacpi_parse_allocated_resource(device->handle, |
| 199 | &dev->res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 201 | pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s", |
Bjorn Helgaas | 4a49049 | 2008-04-28 16:33:50 -0600 | [diff] [blame] | 202 | acpi_device_hid(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | } |
| 204 | } |
| 205 | |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 206 | if (dev->capabilities & PNP_CONFIGURABLE) { |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 207 | status = pnpacpi_parse_resource_option_data(device->handle, |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 208 | dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 210 | pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s", |
Bjorn Helgaas | 4a49049 | 2008-04-28 16:33:50 -0600 | [diff] [blame] | 211 | acpi_device_hid(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | } |
| 213 | } |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 214 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | if (device->flags.compatible_ids) { |
| 216 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; |
| 217 | int i; |
| 218 | |
| 219 | for (i = 0; i < cid_list->count; i++) { |
| 220 | if (!ispnpidacpi(cid_list->id[i].value)) |
| 221 | continue; |
Bjorn Helgaas | 772defc | 2008-04-28 16:33:52 -0600 | [diff] [blame] | 222 | pnp_add_id(dev, cid_list->id[i].value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | } |
| 224 | } |
| 225 | |
| 226 | /* clear out the damaged flags */ |
| 227 | if (!dev->active) |
| 228 | pnp_init_resource_table(&dev->res); |
| 229 | pnp_add_device(dev); |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 230 | num++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | |
| 232 | return AE_OK; |
Bjorn Helgaas | 1e0aa9a | 2007-08-15 10:32:08 -0600 | [diff] [blame] | 233 | err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | kfree(dev); |
| 235 | return -EINVAL; |
| 236 | } |
| 237 | |
| 238 | static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle, |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 239 | u32 lvl, void *context, |
| 240 | void **rv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | { |
| 242 | struct acpi_device *device; |
| 243 | |
| 244 | if (!acpi_bus_get_device(handle, &device)) |
| 245 | pnpacpi_add_device(device); |
| 246 | else |
| 247 | return AE_CTRL_DEPTH; |
| 248 | return AE_OK; |
| 249 | } |
| 250 | |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 251 | static int __init acpi_pnp_match(struct device *dev, void *_pnp) |
| 252 | { |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 253 | struct acpi_device *acpi = to_acpi_device(dev); |
| 254 | struct pnp_dev *pnp = _pnp; |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 255 | |
| 256 | /* true means it matched */ |
| 257 | return acpi->flags.hardware_id |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 258 | && !acpi_get_physical_device(acpi->handle) |
| 259 | && compare_pnp_id(pnp->id, acpi->pnp.hardware_id); |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 260 | } |
| 261 | |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 262 | static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle) |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 263 | { |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 264 | struct device *adev; |
| 265 | struct acpi_device *acpi; |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 266 | |
| 267 | adev = bus_find_device(&acpi_bus_type, NULL, |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 268 | to_pnp_dev(dev), acpi_pnp_match); |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 269 | if (!adev) |
| 270 | return -ENODEV; |
| 271 | |
| 272 | acpi = to_acpi_device(adev); |
| 273 | *handle = acpi->handle; |
| 274 | put_device(adev); |
| 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | /* complete initialization of a PNPACPI device includes having |
| 279 | * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling. |
| 280 | */ |
| 281 | static struct acpi_bus_type __initdata acpi_pnp_bus = { |
Bjorn Helgaas | 07d4e9a | 2007-07-26 10:41:21 -0700 | [diff] [blame] | 282 | .bus = &pnp_bus_type, |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 283 | .find_device = acpi_pnp_find_device, |
| 284 | }; |
| 285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | int pnpacpi_disabled __initdata; |
Adrian Bunk | b449f63 | 2005-11-07 01:01:48 -0800 | [diff] [blame] | 287 | static int __init pnpacpi_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | { |
| 289 | if (acpi_disabled || pnpacpi_disabled) { |
| 290 | pnp_info("PnP ACPI: disabled"); |
| 291 | return 0; |
| 292 | } |
| 293 | pnp_info("PnP ACPI init"); |
| 294 | pnp_register_protocol(&pnpacpi_protocol); |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 295 | register_acpi_bus_type(&acpi_pnp_bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL); |
| 297 | pnp_info("PnP ACPI: found %d devices", num); |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 298 | unregister_acpi_bus_type(&acpi_pnp_bus); |
Bjorn Helgaas | 8f81dd1 | 2007-05-08 00:35:54 -0700 | [diff] [blame] | 299 | pnp_platform_devices = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | return 0; |
| 301 | } |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | subsys_initcall(pnpacpi_init); |
| 304 | |
| 305 | static int __init pnpacpi_setup(char *str) |
| 306 | { |
| 307 | if (str == NULL) |
| 308 | return 1; |
| 309 | if (!strncmp(str, "off", 3)) |
| 310 | pnpacpi_disabled = 1; |
| 311 | return 1; |
| 312 | } |
Bjorn Helgaas | 9dd7846 | 2007-07-26 10:41:20 -0700 | [diff] [blame] | 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | __setup("pnpacpi=", pnpacpi_setup); |