David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 1 | /* |
| 2 | * ideapad_acpi.c - Lenovo IdeaPad ACPI Extras |
| 3 | * |
| 4 | * Copyright © 2010 Intel Corporation |
| 5 | * Copyright © 2010 David Woodhouse <dwmw2@infradead.org> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU 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., 51 Franklin Street, Fifth Floor, Boston, MA |
| 20 | * 02110-1301, USA. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/types.h> |
| 27 | #include <acpi/acpi_bus.h> |
| 28 | #include <acpi/acpi_drivers.h> |
| 29 | #include <linux/rfkill.h> |
| 30 | |
| 31 | #define IDEAPAD_DEV_CAMERA 0 |
| 32 | #define IDEAPAD_DEV_WLAN 1 |
| 33 | #define IDEAPAD_DEV_BLUETOOTH 2 |
| 34 | #define IDEAPAD_DEV_3G 3 |
| 35 | #define IDEAPAD_DEV_KILLSW 4 |
| 36 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 37 | struct ideapad_private { |
| 38 | struct rfkill *rfk[5]; |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 39 | }; |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 40 | |
| 41 | static struct { |
| 42 | char *name; |
Ike Panhc | dfa7f6f | 2010-10-01 15:39:29 +0800 | [diff] [blame^] | 43 | int cfgbit; |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 44 | int type; |
| 45 | } ideapad_rfk_data[] = { |
Ike Panhc | dfa7f6f | 2010-10-01 15:39:29 +0800 | [diff] [blame^] | 46 | { "ideapad_camera", 19, NUM_RFKILL_TYPES }, |
| 47 | { "ideapad_wlan", 18, RFKILL_TYPE_WLAN }, |
| 48 | { "ideapad_bluetooth", 16, RFKILL_TYPE_BLUETOOTH }, |
| 49 | { "ideapad_3g", 17, RFKILL_TYPE_WWAN }, |
| 50 | { "ideapad_killsw", 0, RFKILL_TYPE_WLAN } |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 51 | }; |
| 52 | |
Ike Panhc | 6a09f21 | 2010-10-01 15:38:46 +0800 | [diff] [blame] | 53 | /* |
| 54 | * ACPI Helpers |
| 55 | */ |
| 56 | #define IDEAPAD_EC_TIMEOUT (100) /* in ms */ |
| 57 | |
| 58 | static int read_method_int(acpi_handle handle, const char *method, int *val) |
| 59 | { |
| 60 | acpi_status status; |
| 61 | unsigned long long result; |
| 62 | |
| 63 | status = acpi_evaluate_integer(handle, (char *)method, NULL, &result); |
| 64 | if (ACPI_FAILURE(status)) { |
| 65 | *val = -1; |
| 66 | return -1; |
| 67 | } else { |
| 68 | *val = result; |
| 69 | return 0; |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | static int method_vpcr(acpi_handle handle, int cmd, int *ret) |
| 74 | { |
| 75 | acpi_status status; |
| 76 | unsigned long long result; |
| 77 | struct acpi_object_list params; |
| 78 | union acpi_object in_obj; |
| 79 | |
| 80 | params.count = 1; |
| 81 | params.pointer = &in_obj; |
| 82 | in_obj.type = ACPI_TYPE_INTEGER; |
| 83 | in_obj.integer.value = cmd; |
| 84 | |
| 85 | status = acpi_evaluate_integer(handle, "VPCR", ¶ms, &result); |
| 86 | |
| 87 | if (ACPI_FAILURE(status)) { |
| 88 | *ret = -1; |
| 89 | return -1; |
| 90 | } else { |
| 91 | *ret = result; |
| 92 | return 0; |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | static int method_vpcw(acpi_handle handle, int cmd, int data) |
| 97 | { |
| 98 | struct acpi_object_list params; |
| 99 | union acpi_object in_obj[2]; |
| 100 | acpi_status status; |
| 101 | |
| 102 | params.count = 2; |
| 103 | params.pointer = in_obj; |
| 104 | in_obj[0].type = ACPI_TYPE_INTEGER; |
| 105 | in_obj[0].integer.value = cmd; |
| 106 | in_obj[1].type = ACPI_TYPE_INTEGER; |
| 107 | in_obj[1].integer.value = data; |
| 108 | |
| 109 | status = acpi_evaluate_object(handle, "VPCW", ¶ms, NULL); |
| 110 | if (status != AE_OK) |
| 111 | return -1; |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data) |
| 116 | { |
| 117 | int val; |
| 118 | unsigned long int end_jiffies; |
| 119 | |
| 120 | if (method_vpcw(handle, 1, cmd)) |
| 121 | return -1; |
| 122 | |
| 123 | for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1; |
| 124 | time_before(jiffies, end_jiffies);) { |
| 125 | schedule(); |
| 126 | if (method_vpcr(handle, 1, &val)) |
| 127 | return -1; |
| 128 | if (val == 0) { |
| 129 | if (method_vpcr(handle, 0, &val)) |
| 130 | return -1; |
| 131 | *data = val; |
| 132 | return 0; |
| 133 | } |
| 134 | } |
| 135 | pr_err("timeout in read_ec_cmd\n"); |
| 136 | return -1; |
| 137 | } |
| 138 | |
| 139 | static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data) |
| 140 | { |
| 141 | int val; |
| 142 | unsigned long int end_jiffies; |
| 143 | |
| 144 | if (method_vpcw(handle, 0, data)) |
| 145 | return -1; |
| 146 | if (method_vpcw(handle, 1, cmd)) |
| 147 | return -1; |
| 148 | |
| 149 | for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1; |
| 150 | time_before(jiffies, end_jiffies);) { |
| 151 | schedule(); |
| 152 | if (method_vpcr(handle, 1, &val)) |
| 153 | return -1; |
| 154 | if (val == 0) |
| 155 | return 0; |
| 156 | } |
| 157 | pr_err("timeout in write_ec_cmd\n"); |
| 158 | return -1; |
| 159 | } |
| 160 | /* the above is ACPI helpers */ |
| 161 | |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 162 | static int ideapad_dev_get_state(int device) |
| 163 | { |
| 164 | acpi_status status; |
| 165 | union acpi_object in_param; |
| 166 | struct acpi_object_list input = { 1, &in_param }; |
| 167 | struct acpi_buffer output; |
| 168 | union acpi_object out_obj; |
| 169 | |
| 170 | output.length = sizeof(out_obj); |
| 171 | output.pointer = &out_obj; |
| 172 | |
| 173 | in_param.type = ACPI_TYPE_INTEGER; |
| 174 | in_param.integer.value = device + 1; |
| 175 | |
| 176 | status = acpi_evaluate_object(NULL, "\\_SB_.GECN", &input, &output); |
| 177 | if (ACPI_FAILURE(status)) { |
| 178 | printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method failed %d\n", status); |
| 179 | return -ENODEV; |
| 180 | } |
| 181 | if (out_obj.type != ACPI_TYPE_INTEGER) { |
| 182 | printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method returned unexpected type\n"); |
| 183 | return -ENODEV; |
| 184 | } |
| 185 | return out_obj.integer.value; |
| 186 | } |
| 187 | |
| 188 | static int ideapad_dev_set_state(int device, int state) |
| 189 | { |
| 190 | acpi_status status; |
| 191 | union acpi_object in_params[2]; |
| 192 | struct acpi_object_list input = { 2, in_params }; |
| 193 | |
| 194 | in_params[0].type = ACPI_TYPE_INTEGER; |
| 195 | in_params[0].integer.value = device + 1; |
| 196 | in_params[1].type = ACPI_TYPE_INTEGER; |
| 197 | in_params[1].integer.value = state; |
| 198 | |
| 199 | status = acpi_evaluate_object(NULL, "\\_SB_.SECN", &input, NULL); |
| 200 | if (ACPI_FAILURE(status)) { |
| 201 | printk(KERN_WARNING "IdeaPAD \\_SB_.SECN method failed %d\n", status); |
| 202 | return -ENODEV; |
| 203 | } |
| 204 | return 0; |
| 205 | } |
| 206 | static ssize_t show_ideapad_cam(struct device *dev, |
| 207 | struct device_attribute *attr, |
| 208 | char *buf) |
| 209 | { |
| 210 | int state = ideapad_dev_get_state(IDEAPAD_DEV_CAMERA); |
| 211 | if (state < 0) |
| 212 | return state; |
| 213 | |
| 214 | return sprintf(buf, "%d\n", state); |
| 215 | } |
| 216 | |
| 217 | static ssize_t store_ideapad_cam(struct device *dev, |
| 218 | struct device_attribute *attr, |
| 219 | const char *buf, size_t count) |
| 220 | { |
| 221 | int ret, state; |
| 222 | |
| 223 | if (!count) |
| 224 | return 0; |
| 225 | if (sscanf(buf, "%i", &state) != 1) |
| 226 | return -EINVAL; |
David Woodhouse | 2016e4a | 2010-08-11 17:59:51 +0100 | [diff] [blame] | 227 | ret = ideapad_dev_set_state(IDEAPAD_DEV_CAMERA, !!state); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 228 | if (ret < 0) |
| 229 | return ret; |
| 230 | return count; |
| 231 | } |
| 232 | |
| 233 | static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam); |
| 234 | |
| 235 | static int ideapad_rfk_set(void *data, bool blocked) |
| 236 | { |
| 237 | int device = (unsigned long)data; |
| 238 | |
| 239 | if (device == IDEAPAD_DEV_KILLSW) |
| 240 | return -EINVAL; |
| 241 | return ideapad_dev_set_state(device, !blocked); |
| 242 | } |
| 243 | |
| 244 | static struct rfkill_ops ideapad_rfk_ops = { |
| 245 | .set_block = ideapad_rfk_set, |
| 246 | }; |
| 247 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 248 | static void ideapad_sync_rfk_state(struct acpi_device *adevice) |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 249 | { |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 250 | struct ideapad_private *priv = dev_get_drvdata(&adevice->dev); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 251 | int hw_blocked = !ideapad_dev_get_state(IDEAPAD_DEV_KILLSW); |
| 252 | int i; |
| 253 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 254 | rfkill_set_hw_state(priv->rfk[IDEAPAD_DEV_KILLSW], hw_blocked); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 255 | for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++) |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 256 | if (priv->rfk[i]) |
| 257 | rfkill_set_hw_state(priv->rfk[i], hw_blocked); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 258 | if (hw_blocked) |
| 259 | return; |
| 260 | |
| 261 | for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++) |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 262 | if (priv->rfk[i]) |
| 263 | rfkill_set_sw_state(priv->rfk[i], !ideapad_dev_get_state(i)); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 264 | } |
| 265 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 266 | static int ideapad_register_rfkill(struct acpi_device *adevice, int dev) |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 267 | { |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 268 | struct ideapad_private *priv = dev_get_drvdata(&adevice->dev); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 269 | int ret; |
| 270 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 271 | priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev-1].name, &adevice->dev, |
| 272 | ideapad_rfk_data[dev-1].type, &ideapad_rfk_ops, |
| 273 | (void *)(long)dev); |
| 274 | if (!priv->rfk[dev]) |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 275 | return -ENOMEM; |
| 276 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 277 | ret = rfkill_register(priv->rfk[dev]); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 278 | if (ret) { |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 279 | rfkill_destroy(priv->rfk[dev]); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 280 | return ret; |
| 281 | } |
| 282 | return 0; |
| 283 | } |
| 284 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 285 | static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev) |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 286 | { |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 287 | struct ideapad_private *priv = dev_get_drvdata(&adevice->dev); |
| 288 | |
| 289 | if (!priv->rfk[dev]) |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 290 | return; |
| 291 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 292 | rfkill_unregister(priv->rfk[dev]); |
| 293 | rfkill_destroy(priv->rfk[dev]); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 294 | } |
| 295 | |
| 296 | static const struct acpi_device_id ideapad_device_ids[] = { |
| 297 | { "VPC2004", 0}, |
| 298 | { "", 0}, |
| 299 | }; |
| 300 | MODULE_DEVICE_TABLE(acpi, ideapad_device_ids); |
| 301 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 302 | static int ideapad_acpi_add(struct acpi_device *adevice) |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 303 | { |
Ike Panhc | 6f8371c | 2010-10-01 15:39:14 +0800 | [diff] [blame] | 304 | int i, cfg; |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 305 | int devs_present[5]; |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 306 | struct ideapad_private *priv; |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 307 | |
Ike Panhc | 6f8371c | 2010-10-01 15:39:14 +0800 | [diff] [blame] | 308 | if (read_method_int(adevice->handle, "_CFG", &cfg)) |
| 309 | return -ENODEV; |
| 310 | |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 311 | for (i = IDEAPAD_DEV_CAMERA; i < IDEAPAD_DEV_KILLSW; i++) { |
Ike Panhc | dfa7f6f | 2010-10-01 15:39:29 +0800 | [diff] [blame^] | 312 | if (test_bit(ideapad_rfk_data[i].cfgbit, (unsigned long *)&cfg)) |
| 313 | devs_present[i] = 1; |
| 314 | else |
| 315 | devs_present[i] = 0; |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 316 | } |
| 317 | |
| 318 | /* The hardware switch is always present */ |
| 319 | devs_present[IDEAPAD_DEV_KILLSW] = 1; |
| 320 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 321 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
| 322 | if (!priv) |
| 323 | return -ENOMEM; |
| 324 | |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 325 | if (devs_present[IDEAPAD_DEV_CAMERA]) { |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 326 | int ret = device_create_file(&adevice->dev, &dev_attr_camera_power); |
| 327 | if (ret) { |
| 328 | kfree(priv); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 329 | return ret; |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 330 | } |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 331 | } |
| 332 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 333 | dev_set_drvdata(&adevice->dev, priv); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 334 | for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++) { |
| 335 | if (!devs_present[i]) |
| 336 | continue; |
| 337 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 338 | ideapad_register_rfkill(adevice, i); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 339 | } |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 340 | ideapad_sync_rfk_state(adevice); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 341 | return 0; |
| 342 | } |
| 343 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 344 | static int ideapad_acpi_remove(struct acpi_device *adevice, int type) |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 345 | { |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 346 | struct ideapad_private *priv = dev_get_drvdata(&adevice->dev); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 347 | int i; |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 348 | |
| 349 | device_remove_file(&adevice->dev, &dev_attr_camera_power); |
| 350 | |
| 351 | for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++) |
| 352 | ideapad_unregister_rfkill(adevice, i); |
| 353 | |
| 354 | dev_set_drvdata(&adevice->dev, NULL); |
| 355 | kfree(priv); |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 356 | return 0; |
| 357 | } |
| 358 | |
David Woodhouse | ce32632 | 2010-08-11 17:59:35 +0100 | [diff] [blame] | 359 | static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event) |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 360 | { |
Ike Panhc | 8e7d354 | 2010-10-01 15:39:05 +0800 | [diff] [blame] | 361 | acpi_handle handle = adevice->handle; |
| 362 | unsigned long vpc1, vpc2, vpc_bit; |
| 363 | |
| 364 | if (read_ec_data(handle, 0x10, &vpc1)) |
| 365 | return; |
| 366 | if (read_ec_data(handle, 0x1A, &vpc2)) |
| 367 | return; |
| 368 | |
| 369 | vpc1 = (vpc2 << 8) | vpc1; |
| 370 | for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) { |
| 371 | if (test_bit(vpc_bit, &vpc1)) { |
| 372 | if (vpc_bit == 9) |
| 373 | ideapad_sync_rfk_state(adevice); |
| 374 | } |
| 375 | } |
David Woodhouse | 58ac7aa | 2010-08-10 23:44:05 +0100 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | static struct acpi_driver ideapad_acpi_driver = { |
| 379 | .name = "ideapad_acpi", |
| 380 | .class = "IdeaPad", |
| 381 | .ids = ideapad_device_ids, |
| 382 | .ops.add = ideapad_acpi_add, |
| 383 | .ops.remove = ideapad_acpi_remove, |
| 384 | .ops.notify = ideapad_acpi_notify, |
| 385 | .owner = THIS_MODULE, |
| 386 | }; |
| 387 | |
| 388 | |
| 389 | static int __init ideapad_acpi_module_init(void) |
| 390 | { |
| 391 | acpi_bus_register_driver(&ideapad_acpi_driver); |
| 392 | |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | |
| 397 | static void __exit ideapad_acpi_module_exit(void) |
| 398 | { |
| 399 | acpi_bus_unregister_driver(&ideapad_acpi_driver); |
| 400 | |
| 401 | } |
| 402 | |
| 403 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); |
| 404 | MODULE_DESCRIPTION("IdeaPad ACPI Extras"); |
| 405 | MODULE_LICENSE("GPL"); |
| 406 | |
| 407 | module_init(ideapad_acpi_module_init); |
| 408 | module_exit(ideapad_acpi_module_exit); |