1c942fddfSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
21da177e4SLinus Torvalds /*
350a4da89SBjorn Helgaas * button.c - ACPI Button Driver
41da177e4SLinus Torvalds *
51da177e4SLinus Torvalds * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
61da177e4SLinus Torvalds * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
71da177e4SLinus Torvalds */
81da177e4SLinus Torvalds
9dfa46c50SLv Zheng #define pr_fmt(fmt) "ACPI: button: " fmt
10dfa46c50SLv Zheng
112c4c2a71SRandy Dunlap #include <linux/compiler.h>
121da177e4SLinus Torvalds #include <linux/kernel.h>
131da177e4SLinus Torvalds #include <linux/module.h>
141da177e4SLinus Torvalds #include <linux/init.h>
15b34a8030SAlexey Starikovskiy #include <linux/types.h>
16b34a8030SAlexey Starikovskiy #include <linux/proc_fs.h>
17b34a8030SAlexey Starikovskiy #include <linux/seq_file.h>
18c0968f0eSDmitry Torokhov #include <linux/input.h>
195a0e3ad6STejun Heo #include <linux/slab.h>
208b48463fSLv Zheng #include <linux/acpi.h>
219e811e19SHans de Goede #include <linux/dmi.h>
226270da6fSAndy Shevchenko #include <acpi/button.h>
231da177e4SLinus Torvalds
241da177e4SLinus Torvalds #define ACPI_BUTTON_CLASS "button"
25b34a8030SAlexey Starikovskiy #define ACPI_BUTTON_FILE_STATE "state"
26b34a8030SAlexey Starikovskiy #define ACPI_BUTTON_TYPE_UNKNOWN 0x00
271da177e4SLinus Torvalds #define ACPI_BUTTON_NOTIFY_STATUS 0x80
281da177e4SLinus Torvalds
291da177e4SLinus Torvalds #define ACPI_BUTTON_SUBCLASS_POWER "power"
30d68b597cSBjorn Helgaas #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button"
311da177e4SLinus Torvalds #define ACPI_BUTTON_TYPE_POWER 0x01
321da177e4SLinus Torvalds
331da177e4SLinus Torvalds #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
34d68b597cSBjorn Helgaas #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button"
351da177e4SLinus Torvalds #define ACPI_BUTTON_TYPE_SLEEP 0x03
361da177e4SLinus Torvalds
371da177e4SLinus Torvalds #define ACPI_BUTTON_SUBCLASS_LID "lid"
381da177e4SLinus Torvalds #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
391da177e4SLinus Torvalds #define ACPI_BUTTON_TYPE_LID 0x05
401da177e4SLinus Torvalds
41065bd4d3SHans de Goede enum {
42065bd4d3SHans de Goede ACPI_BUTTON_LID_INIT_IGNORE,
43065bd4d3SHans de Goede ACPI_BUTTON_LID_INIT_OPEN,
44065bd4d3SHans de Goede ACPI_BUTTON_LID_INIT_METHOD,
45593681e2SHans de Goede ACPI_BUTTON_LID_INIT_DISABLED,
46065bd4d3SHans de Goede };
47065bd4d3SHans de Goede
48065bd4d3SHans de Goede static const char * const lid_init_state_str[] = {
49065bd4d3SHans de Goede [ACPI_BUTTON_LID_INIT_IGNORE] = "ignore",
50065bd4d3SHans de Goede [ACPI_BUTTON_LID_INIT_OPEN] = "open",
51065bd4d3SHans de Goede [ACPI_BUTTON_LID_INIT_METHOD] = "method",
52593681e2SHans de Goede [ACPI_BUTTON_LID_INIT_DISABLED] = "disabled",
53065bd4d3SHans de Goede };
543540c32aSLv Zheng
551da177e4SLinus Torvalds MODULE_AUTHOR("Paul Diefenbaugh");
567cda93e0SLen Brown MODULE_DESCRIPTION("ACPI Button Driver");
571da177e4SLinus Torvalds MODULE_LICENSE("GPL");
581da177e4SLinus Torvalds
591ba90e3aSThomas Renninger static const struct acpi_device_id button_device_ids[] = {
601ba90e3aSThomas Renninger {ACPI_BUTTON_HID_LID, 0},
611ba90e3aSThomas Renninger {ACPI_BUTTON_HID_SLEEP, 0},
621ba90e3aSThomas Renninger {ACPI_BUTTON_HID_SLEEPF, 0},
631ba90e3aSThomas Renninger {ACPI_BUTTON_HID_POWER, 0},
641ba90e3aSThomas Renninger {ACPI_BUTTON_HID_POWERF, 0},
651ba90e3aSThomas Renninger {"", 0},
661ba90e3aSThomas Renninger };
671ba90e3aSThomas Renninger MODULE_DEVICE_TABLE(acpi, button_device_ids);
681ba90e3aSThomas Renninger
69d7cd0823SHans de Goede /* Please keep this list sorted alphabetically by vendor and model */
70d7cd0823SHans de Goede static const struct dmi_system_id dmi_lid_quirks[] = {
719e811e19SHans de Goede {
72d7cd0823SHans de Goede /* GP-electronic T701, _LID method points to a floating GPIO */
739e811e19SHans de Goede .matches = {
749e811e19SHans de Goede DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
759e811e19SHans de Goede DMI_MATCH(DMI_PRODUCT_NAME, "T701"),
769e811e19SHans de Goede DMI_MATCH(DMI_BIOS_VERSION, "BYT70A.YNCHENG.WIN.007"),
779e811e19SHans de Goede },
78d7cd0823SHans de Goede .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_DISABLED,
799e811e19SHans de Goede },
80932e1ba4SHans de Goede {
81932e1ba4SHans de Goede /* Nextbook Ares 8A tablet, _LID device always reports lid closed */
821a20d409SUlrich Huber .matches = {
831a20d409SUlrich Huber DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
841a20d409SUlrich Huber DMI_MATCH(DMI_PRODUCT_NAME, "CherryTrail"),
851a20d409SUlrich Huber DMI_MATCH(DMI_BIOS_VERSION, "M882"),
861a20d409SUlrich Huber },
871a20d409SUlrich Huber .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_DISABLED,
881a20d409SUlrich Huber },
891a20d409SUlrich Huber {
901a20d409SUlrich Huber /*
911a20d409SUlrich Huber * Lenovo Yoga 9 14ITL5, initial notification of the LID device
921a20d409SUlrich Huber * never happens.
93932e1ba4SHans de Goede */
94932e1ba4SHans de Goede .matches = {
95932e1ba4SHans de Goede DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
96932e1ba4SHans de Goede DMI_MATCH(DMI_PRODUCT_NAME, "82BG"),
97932e1ba4SHans de Goede },
987daaa063SHans de Goede .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN,
997daaa063SHans de Goede },
1007daaa063SHans de Goede {
1017daaa063SHans de Goede /*
1027daaa063SHans de Goede * Medion Akoya E2215T, notification of the LID device only
1037daaa063SHans de Goede * happens on close, not on open and _LID always returns closed.
1047daaa063SHans de Goede */
1057daaa063SHans de Goede .matches = {
1067daaa063SHans de Goede DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
1077daaa063SHans de Goede DMI_MATCH(DMI_PRODUCT_NAME, "E2215T"),
1087daaa063SHans de Goede },
1097daaa063SHans de Goede .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN,
110932e1ba4SHans de Goede },
111932e1ba4SHans de Goede {
112932e1ba4SHans de Goede /*
11305289049SJason Ekstrand * Medion Akoya E2228T, notification of the LID device only
11405289049SJason Ekstrand * happens on close, not on open and _LID always returns closed.
11505289049SJason Ekstrand */
11605289049SJason Ekstrand .matches = {
11705289049SJason Ekstrand DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
11805289049SJason Ekstrand DMI_MATCH(DMI_PRODUCT_NAME, "E2228T"),
11905289049SJason Ekstrand },
12005289049SJason Ekstrand .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN,
12105289049SJason Ekstrand },
12205289049SJason Ekstrand {
12305289049SJason Ekstrand /*
1249e811e19SHans de Goede * Razer Blade Stealth 13 late 2019, notification of the LID device
1259e811e19SHans de Goede * only happens on close, not on open and _LID always returns closed.
1269e811e19SHans de Goede */
1271da177e4SLinus Torvalds .matches = {
1286c0eb5baSDawei Li DMI_MATCH(DMI_SYS_VENDOR, "Razer"),
1291da177e4SLinus Torvalds DMI_MATCH(DMI_PRODUCT_NAME, "Razer Blade Stealth 13 Late 2019"),
13090692404SRafael J. Wysocki },
131e71eeb2aSRafael J. Wysocki .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN,
1321be532deSRafael J. Wysocki },
1332de9fd17SShuah Khan {}
134e71eeb2aSRafael J. Wysocki };
1352de9fd17SShuah Khan
13690692404SRafael J. Wysocki static int acpi_button_add(struct acpi_device *device);
137e71eeb2aSRafael J. Wysocki static void acpi_button_remove(struct acpi_device *device);
1381be532deSRafael J. Wysocki
1391da177e4SLinus Torvalds #ifdef CONFIG_PM_SLEEP
140c2b6705bSLen Brown static int acpi_button_suspend(struct device *dev);
1411da177e4SLinus Torvalds static int acpi_button_resume(struct device *dev);
1421ba90e3aSThomas Renninger #else
1431da177e4SLinus Torvalds #define acpi_button_suspend NULL
1441da177e4SLinus Torvalds #define acpi_button_resume NULL
1451da177e4SLinus Torvalds #endif
1461da177e4SLinus Torvalds static SIMPLE_DEV_PM_OPS(acpi_button_pm, acpi_button_suspend, acpi_button_resume);
1471be532deSRafael J. Wysocki
1481da177e4SLinus Torvalds static struct acpi_driver acpi_button_driver = {
1491da177e4SLinus Torvalds .name = "button",
1501da177e4SLinus Torvalds .class = ACPI_BUTTON_CLASS,
151c0968f0eSDmitry Torokhov .ids = button_device_ids,
152c0968f0eSDmitry Torokhov .ops = {
153c0968f0eSDmitry Torokhov .add = acpi_button_add,
1541da177e4SLinus Torvalds .remove = acpi_button_remove,
155dfa46c50SLv Zheng },
156dfa46c50SLv Zheng .drv.pm = &acpi_button_pm,
157e71eeb2aSRafael J. Wysocki };
15821988a8eSdmitry.torokhov@gmail.com
1591da177e4SLinus Torvalds struct acpi_button {
1601da177e4SLinus Torvalds unsigned int type;
1617e12715eSJesse Barnes struct input_dev *input;
162d7cd0823SHans de Goede char phys[32]; /* for input device */
1637e12715eSJesse Barnes unsigned long pushed;
164dfa46c50SLv Zheng int last_state;
165dfa46c50SLv Zheng ktime_t last_time;
166dfa46c50SLv Zheng bool suspended;
167dfa46c50SLv Zheng bool lid_state_initialized;
168effbe640SXiaofei Tan };
169b34a8030SAlexey Starikovskiy
170912b7427SZhang Rui static struct acpi_device *lid_device;
171b34a8030SAlexey Starikovskiy static long lid_init_state = -1;
172ee7e2265SLv Zheng
173ee7e2265SLv Zheng static unsigned long lid_report_interval __read_mostly = 500;
174ee7e2265SLv Zheng module_param(lid_report_interval, ulong, 0644);
175ee7e2265SLv Zheng MODULE_PARM_DESC(lid_report_interval, "Interval (ms) between lid key events");
176ee7e2265SLv Zheng
177ee7e2265SLv Zheng /* FS Interface (/proc) */
178ee7e2265SLv Zheng static struct proc_dir_entry *acpi_button_dir;
179ee7e2265SLv Zheng static struct proc_dir_entry *acpi_lid_dir;
180ee7e2265SLv Zheng
acpi_lid_evaluate_state(struct acpi_device * device)181ee7e2265SLv Zheng static int acpi_lid_evaluate_state(struct acpi_device *device)
182ee7e2265SLv Zheng {
183ee7e2265SLv Zheng unsigned long long lid_state;
184ee7e2265SLv Zheng acpi_status status;
185ee7e2265SLv Zheng
186ee7e2265SLv Zheng status = acpi_evaluate_integer(device->handle, "_LID", NULL, &lid_state);
187dfa46c50SLv Zheng if (ACPI_FAILURE(status))
188dfa46c50SLv Zheng return -ENODEV;
189ee7e2265SLv Zheng
190dfa46c50SLv Zheng return lid_state ? 1 : 0;
191dfa46c50SLv Zheng }
192dfa46c50SLv Zheng
acpi_lid_notify_state(struct acpi_device * device,int state)193dfa46c50SLv Zheng static int acpi_lid_notify_state(struct acpi_device *device, int state)
194dfa46c50SLv Zheng {
195dfa46c50SLv Zheng struct acpi_button *button = acpi_driver_data(device);
196dfa46c50SLv Zheng ktime_t next_report;
197dfa46c50SLv Zheng bool do_update;
198dfa46c50SLv Zheng
199dfa46c50SLv Zheng /*
200dfa46c50SLv Zheng * In lid_init_state=ignore mode, if user opens/closes lid
201dfa46c50SLv Zheng * frequently with "open" missing, and "last_time" is also updated
202dfa46c50SLv Zheng * frequently, "close" cannot be delivered to the userspace.
203dfa46c50SLv Zheng * So "last_time" is only updated after a timeout or an actual
204dfa46c50SLv Zheng * switch.
205dfa46c50SLv Zheng */
206dfa46c50SLv Zheng if (lid_init_state != ACPI_BUTTON_LID_INIT_IGNORE ||
207dfa46c50SLv Zheng button->last_state != !!state)
208dfa46c50SLv Zheng do_update = true;
209dfa46c50SLv Zheng else
210dfa46c50SLv Zheng do_update = false;
211dfa46c50SLv Zheng
212dfa46c50SLv Zheng next_report = ktime_add(button->last_time,
213dfa46c50SLv Zheng ms_to_ktime(lid_report_interval));
214dfa46c50SLv Zheng if (button->last_state == !!state &&
215dfa46c50SLv Zheng ktime_after(ktime_get(), next_report)) {
216dfa46c50SLv Zheng /* Complain the buggy firmware */
217dfa46c50SLv Zheng pr_warn_once("The lid device is not compliant to SW_LID.\n");
218dfa46c50SLv Zheng
219dfa46c50SLv Zheng /*
220dfa46c50SLv Zheng * Send the unreliable complement switch event:
221dfa46c50SLv Zheng *
222dfa46c50SLv Zheng * On most platforms, the lid device is reliable. However
223dfa46c50SLv Zheng * there are exceptions:
224dfa46c50SLv Zheng * 1. Platforms returning initial lid state as "close" by
225dfa46c50SLv Zheng * default after booting/resuming:
226dfa46c50SLv Zheng * https://bugzilla.kernel.org/show_bug.cgi?id=89211
227dfa46c50SLv Zheng * https://bugzilla.kernel.org/show_bug.cgi?id=106151
228dfa46c50SLv Zheng * 2. Platforms never reporting "open" events:
229dfa46c50SLv Zheng * https://bugzilla.kernel.org/show_bug.cgi?id=106941
230dfa46c50SLv Zheng * On these buggy platforms, the usage model of the ACPI
231dfa46c50SLv Zheng * lid device actually is:
232dfa46c50SLv Zheng * 1. The initial returning value of _LID may not be
233dfa46c50SLv Zheng * reliable.
234dfa46c50SLv Zheng * 2. The open event may not be reliable.
235dfa46c50SLv Zheng * 3. The close event is reliable.
236dfa46c50SLv Zheng *
237dfa46c50SLv Zheng * But SW_LID is typed as input switch event, the input
238dfa46c50SLv Zheng * layer checks if the event is redundant. Hence if the
239dfa46c50SLv Zheng * state is not switched, the userspace cannot see this
240dfa46c50SLv Zheng * platform triggered reliable event. By inserting a
241dfa46c50SLv Zheng * complement switch event, it then is guaranteed that the
242dfa46c50SLv Zheng * platform triggered reliable one can always be seen by
243dfa46c50SLv Zheng * the userspace.
244dfa46c50SLv Zheng */
245dfa46c50SLv Zheng if (lid_init_state == ACPI_BUTTON_LID_INIT_IGNORE) {
246dfa46c50SLv Zheng do_update = true;
247dfa46c50SLv Zheng /*
248dfa46c50SLv Zheng * Do generate complement switch event for "close"
249dfa46c50SLv Zheng * as "close" is reliable and wrong "open" won't
250dfa46c50SLv Zheng * trigger unexpected behaviors.
251dfa46c50SLv Zheng * Do not generate complement switch event for
252dfa46c50SLv Zheng * "open" as "open" is not reliable and wrong
253dfa46c50SLv Zheng * "close" will trigger unexpected behaviors.
254dfa46c50SLv Zheng */
255ae35d656SHans de Goede if (!state) {
256ae35d656SHans de Goede input_report_switch(button->input,
257ee7e2265SLv Zheng SW_LID, state);
258ee7e2265SLv Zheng input_sync(button->input);
259dfa46c50SLv Zheng }
260dfa46c50SLv Zheng }
261dfa46c50SLv Zheng }
262ee7e2265SLv Zheng /* Send the platform triggered reliable event */
263e346d0cfSHans de Goede if (do_update) {
264ee7e2265SLv Zheng acpi_handle_debug(device->handle, "ACPI LID %s\n",
265ee7e2265SLv Zheng state ? "open" : "closed");
2662c4c2a71SRandy Dunlap input_report_switch(button->input, SW_LID, !state);
2672c4c2a71SRandy Dunlap input_sync(button->input);
268b34a8030SAlexey Starikovskiy button->last_state = !!state;
269106c19e7SBjorn Helgaas button->last_time = ktime_get();
270ee7e2265SLv Zheng }
271b34a8030SAlexey Starikovskiy
272ee7e2265SLv Zheng return 0;
2734be44fcdSLen Brown }
274ee7e2265SLv Zheng
acpi_button_state_seq_show(struct seq_file * seq,void * offset)275d550d98dSPatrick Mochel static int __maybe_unused acpi_button_state_seq_show(struct seq_file *seq,
276b34a8030SAlexey Starikovskiy void *offset)
277b34a8030SAlexey Starikovskiy {
2784be44fcdSLen Brown struct acpi_device *device = seq->private;
279b34a8030SAlexey Starikovskiy int state;
2801bce8113SBjorn Helgaas
281b34a8030SAlexey Starikovskiy state = acpi_lid_evaluate_state(device);
282912b7427SZhang Rui seq_printf(seq, "state: %s\n",
283b34a8030SAlexey Starikovskiy state < 0 ? "unsupported" : (state ? "open" : "closed"));
284912b7427SZhang Rui return 0;
285912b7427SZhang Rui }
286912b7427SZhang Rui
acpi_button_add_fs(struct acpi_device * device)287912b7427SZhang Rui static int acpi_button_add_fs(struct acpi_device *device)
288912b7427SZhang Rui {
289411e3216SRafael J. Wysocki struct acpi_button *button = acpi_driver_data(device);
290912b7427SZhang Rui struct proc_dir_entry *entry = NULL;
291b34a8030SAlexey Starikovskiy int ret = 0;
292b34a8030SAlexey Starikovskiy
293912b7427SZhang Rui /* procfs I/F for ACPI lid device only */
294912b7427SZhang Rui if (button->type != ACPI_BUTTON_TYPE_LID)
295912b7427SZhang Rui return 0;
296d550d98dSPatrick Mochel
297b34a8030SAlexey Starikovskiy if (acpi_button_dir || acpi_lid_dir) {
298912b7427SZhang Rui pr_info("More than one Lid device found!\n");
299912b7427SZhang Rui return -EEXIST;
300912b7427SZhang Rui }
301912b7427SZhang Rui
302912b7427SZhang Rui /* create /proc/acpi/button */
303912b7427SZhang Rui acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
304b34a8030SAlexey Starikovskiy if (!acpi_button_dir)
305912b7427SZhang Rui return -ENODEV;
306912b7427SZhang Rui
307912b7427SZhang Rui /* create /proc/acpi/button/lid */
308912b7427SZhang Rui acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
309912b7427SZhang Rui if (!acpi_lid_dir) {
310912b7427SZhang Rui ret = -ENODEV;
311b34a8030SAlexey Starikovskiy goto remove_button_dir;
312912b7427SZhang Rui }
3133f3942acSChristoph Hellwig
3143f3942acSChristoph Hellwig /* create /proc/acpi/button/lid/LID/ */
3153f3942acSChristoph Hellwig acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir);
316912b7427SZhang Rui if (!acpi_device_dir(device)) {
317912b7427SZhang Rui ret = -ENODEV;
318912b7427SZhang Rui goto remove_lid_dir;
319b34a8030SAlexey Starikovskiy }
320b34a8030SAlexey Starikovskiy
321912b7427SZhang Rui /* create /proc/acpi/button/lid/LID/state */
322912b7427SZhang Rui entry = proc_create_single_data(ACPI_BUTTON_FILE_STATE, S_IRUGO,
323912b7427SZhang Rui acpi_device_dir(device), acpi_button_state_seq_show,
324912b7427SZhang Rui device);
325912b7427SZhang Rui if (!entry) {
326912b7427SZhang Rui ret = -ENODEV;
327912b7427SZhang Rui goto remove_dev_dir;
328912b7427SZhang Rui }
329912b7427SZhang Rui
330e370cc86SBenjamin Tissoires done:
331912b7427SZhang Rui return ret;
332912b7427SZhang Rui
333e370cc86SBenjamin Tissoires remove_dev_dir:
334912b7427SZhang Rui remove_proc_entry(acpi_device_bid(device),
335b34a8030SAlexey Starikovskiy acpi_lid_dir);
336b34a8030SAlexey Starikovskiy acpi_device_dir(device) = NULL;
3374be44fcdSLen Brown remove_lid_dir:
338b34a8030SAlexey Starikovskiy remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
339c0968f0eSDmitry Torokhov acpi_lid_dir = NULL;
340b34a8030SAlexey Starikovskiy remove_button_dir:
341912b7427SZhang Rui remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
342912b7427SZhang Rui acpi_button_dir = NULL;
343912b7427SZhang Rui goto done;
344b34a8030SAlexey Starikovskiy }
345b34a8030SAlexey Starikovskiy
acpi_button_remove_fs(struct acpi_device * device)346b34a8030SAlexey Starikovskiy static int acpi_button_remove_fs(struct acpi_device *device)
347912b7427SZhang Rui {
348b34a8030SAlexey Starikovskiy struct acpi_button *button = acpi_driver_data(device);
349912b7427SZhang Rui
350e370cc86SBenjamin Tissoires if (button->type != ACPI_BUTTON_TYPE_LID)
351912b7427SZhang Rui return 0;
352e370cc86SBenjamin Tissoires
353b34a8030SAlexey Starikovskiy remove_proc_entry(ACPI_BUTTON_FILE_STATE,
354d550d98dSPatrick Mochel acpi_device_dir(device));
355b34a8030SAlexey Starikovskiy remove_proc_entry(acpi_device_bid(device),
356b34a8030SAlexey Starikovskiy acpi_lid_dir);
357effbe640SXiaofei Tan acpi_device_dir(device) = NULL;
3587e12715eSJesse Barnes remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
3597e12715eSJesse Barnes acpi_lid_dir = NULL;
3602c907b72SJesse Barnes remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
3612c907b72SJesse Barnes acpi_button_dir = NULL;
3622c907b72SJesse Barnes
363ee7e2265SLv Zheng return 0;
3647e12715eSJesse Barnes }
3657e12715eSJesse Barnes
3667e12715eSJesse Barnes /* Driver Interface */
acpi_lid_open(void)3677c058c7cSRavi Chandra Sadineni int acpi_lid_open(void)
3687c058c7cSRavi Chandra Sadineni {
36923de5d9eSAlexey Starikovskiy if (!lid_device)
370ee7e2265SLv Zheng return -ENODEV;
37123de5d9eSAlexey Starikovskiy
372ee7e2265SLv Zheng return acpi_lid_evaluate_state(lid_device);
373ee7e2265SLv Zheng }
374ee7e2265SLv Zheng EXPORT_SYMBOL(acpi_lid_open);
37550a4da89SBjorn Helgaas
acpi_lid_update_state(struct acpi_device * device,bool signal_wakeup)3767c058c7cSRavi Chandra Sadineni static int acpi_lid_update_state(struct acpi_device *device,
3777c058c7cSRavi Chandra Sadineni bool signal_wakeup)
3787c058c7cSRavi Chandra Sadineni {
379ee7e2265SLv Zheng int state;
38023de5d9eSAlexey Starikovskiy
3811da177e4SLinus Torvalds state = acpi_lid_evaluate_state(device);
3823540c32aSLv Zheng if (state < 0)
3833540c32aSLv Zheng return state;
38421988a8eSdmitry.torokhov@gmail.com
38521988a8eSdmitry.torokhov@gmail.com if (state && signal_wakeup)
3863540c32aSLv Zheng acpi_pm_wakeup_event(&device->dev);
3873540c32aSLv Zheng
3883540c32aSLv Zheng return acpi_lid_notify_state(device, state);
3893540c32aSLv Zheng }
390f369fdf4SLv Zheng
acpi_lid_initialize_state(struct acpi_device * device)3917c058c7cSRavi Chandra Sadineni static void acpi_lid_initialize_state(struct acpi_device *device)
392f369fdf4SLv Zheng {
3933540c32aSLv Zheng struct acpi_button *button = acpi_driver_data(device);
3943540c32aSLv Zheng
3953540c32aSLv Zheng switch (lid_init_state) {
3963540c32aSLv Zheng case ACPI_BUTTON_LID_INIT_OPEN:
39721988a8eSdmitry.torokhov@gmail.com (void)acpi_lid_notify_state(device, 1);
39821988a8eSdmitry.torokhov@gmail.com break;
3993540c32aSLv Zheng case ACPI_BUTTON_LID_INIT_METHOD:
4003540c32aSLv Zheng (void)acpi_lid_update_state(device, false);
401*e4e62d5fSRafael J. Wysocki break;
402*e4e62d5fSRafael J. Wysocki case ACPI_BUTTON_LID_INIT_IGNORE:
403*e4e62d5fSRafael J. Wysocki default:
404*e4e62d5fSRafael J. Wysocki break;
405*e4e62d5fSRafael J. Wysocki }
406*e4e62d5fSRafael J. Wysocki
407*e4e62d5fSRafael J. Wysocki button->lid_state_initialized = true;
408*e4e62d5fSRafael J. Wysocki }
409*e4e62d5fSRafael J. Wysocki
acpi_lid_notify(acpi_handle handle,u32 event,void * data)410*e4e62d5fSRafael J. Wysocki static void acpi_lid_notify(acpi_handle handle, u32 event, void *data)
411*e4e62d5fSRafael J. Wysocki {
412*e4e62d5fSRafael J. Wysocki struct acpi_device *device = data;
413*e4e62d5fSRafael J. Wysocki struct acpi_button *button;
414*e4e62d5fSRafael J. Wysocki
415*e4e62d5fSRafael J. Wysocki if (event != ACPI_BUTTON_NOTIFY_STATUS) {
416*e4e62d5fSRafael J. Wysocki acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n",
417*e4e62d5fSRafael J. Wysocki event);
418*e4e62d5fSRafael J. Wysocki return;
4190d51157dSRafael J. Wysocki }
4201da177e4SLinus Torvalds
4210d51157dSRafael J. Wysocki button = acpi_driver_data(device);
4220d51157dSRafael J. Wysocki if (!button->lid_state_initialized)
423c0968f0eSDmitry Torokhov return;
4240d51157dSRafael J. Wysocki
4251da177e4SLinus Torvalds acpi_lid_update_state(device, true);
4260d51157dSRafael J. Wysocki }
4270d51157dSRafael J. Wysocki
acpi_button_notify(acpi_handle handle,u32 event,void * data)4280d51157dSRafael J. Wysocki static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
4290d51157dSRafael J. Wysocki {
4300d51157dSRafael J. Wysocki struct acpi_device *device = data;
4310d51157dSRafael J. Wysocki struct acpi_button *button;
43233e4f80eSRafael J. Wysocki struct input_dev *input;
433e71eeb2aSRafael J. Wysocki int keycode;
434*e4e62d5fSRafael J. Wysocki
4350d51157dSRafael J. Wysocki if (event != ACPI_BUTTON_NOTIFY_STATUS) {
4360d51157dSRafael J. Wysocki acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n",
4370d51157dSRafael J. Wysocki event);
4380d51157dSRafael J. Wysocki return;
4390d51157dSRafael J. Wysocki }
4400d51157dSRafael J. Wysocki
441c0968f0eSDmitry Torokhov acpi_pm_wakeup_event(&device->dev);
442c0968f0eSDmitry Torokhov
443c0968f0eSDmitry Torokhov button = acpi_driver_data(device);
444c0968f0eSDmitry Torokhov if (button->suspended)
4451f83511bSRafael J. Wysocki return;
4460d51157dSRafael J. Wysocki
4470bf6368eSLan Tianyu input = button->input;
4480bf6368eSLan Tianyu keycode = test_bit(KEY_SLEEP, input->keybit) ? KEY_SLEEP : KEY_POWER;
449df316e93SGuillem Jover
4500d51157dSRafael J. Wysocki input_report_key(input, keycode, 1);
4510d51157dSRafael J. Wysocki input_sync(input);
4520d51157dSRafael J. Wysocki input_report_key(input, keycode, 0);
4530d51157dSRafael J. Wysocki input_sync(input);
4541da177e4SLinus Torvalds
4550d51157dSRafael J. Wysocki acpi_bus_generate_netlink_event(device->pnp.device_class,
4560d51157dSRafael J. Wysocki dev_name(&device->dev),
4570d51157dSRafael J. Wysocki event, ++button->pushed);
4580d51157dSRafael J. Wysocki }
4590d51157dSRafael J. Wysocki
acpi_button_notify_run(void * data)4601da177e4SLinus Torvalds static void acpi_button_notify_run(void *data)
4611da177e4SLinus Torvalds {
46290692404SRafael J. Wysocki acpi_button_notify(NULL, ACPI_BUTTON_NOTIFY_STATUS, data);
463e71eeb2aSRafael J. Wysocki }
464e71eeb2aSRafael J. Wysocki
acpi_button_event(void * data)465e71eeb2aSRafael J. Wysocki static u32 acpi_button_event(void *data)
466e71eeb2aSRafael J. Wysocki {
467e71eeb2aSRafael J. Wysocki acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_button_notify_run, data);
468e71eeb2aSRafael J. Wysocki return ACPI_INTERRUPT_HANDLED;
469e71eeb2aSRafael J. Wysocki }
470e71eeb2aSRafael J. Wysocki
471e71eeb2aSRafael J. Wysocki #ifdef CONFIG_PM_SLEEP
acpi_button_suspend(struct device * dev)4721be532deSRafael J. Wysocki static int acpi_button_suspend(struct device *dev)
47323de5d9eSAlexey Starikovskiy {
4741be532deSRafael J. Wysocki struct acpi_device *device = to_acpi_device(dev);
4751bce8113SBjorn Helgaas struct acpi_button *button = acpi_driver_data(device);
47650a4da89SBjorn Helgaas
477e71eeb2aSRafael J. Wysocki button->suspended = true;
47821988a8eSdmitry.torokhov@gmail.com return 0;
47913e96214SZhang Rui }
48013e96214SZhang Rui
acpi_button_resume(struct device * dev)4813540c32aSLv Zheng static int acpi_button_resume(struct device *dev)
48213e96214SZhang Rui {
48323de5d9eSAlexey Starikovskiy struct acpi_device *device = to_acpi_device(dev);
48423de5d9eSAlexey Starikovskiy struct acpi_button *button = acpi_driver_data(device);
48590692404SRafael J. Wysocki
48623de5d9eSAlexey Starikovskiy button->suspended = false;
48784d3f6b7SHans de Goede if (button->type == ACPI_BUTTON_TYPE_LID) {
48884d3f6b7SHans de Goede button->last_state = !!acpi_lid_evaluate_state(device);
48984d3f6b7SHans de Goede button->last_time = ktime_get();
49084d3f6b7SHans de Goede acpi_lid_initialize_state(device);
49184d3f6b7SHans de Goede }
49284d3f6b7SHans de Goede return 0;
49384d3f6b7SHans de Goede }
49484d3f6b7SHans de Goede #endif
49584d3f6b7SHans de Goede
acpi_lid_input_open(struct input_dev * input)49684d3f6b7SHans de Goede static int acpi_lid_input_open(struct input_dev *input)
49784d3f6b7SHans de Goede {
49884d3f6b7SHans de Goede struct acpi_device *device = input_get_drvdata(input);
4994be44fcdSLen Brown struct acpi_button *button = acpi_driver_data(device);
5001da177e4SLinus Torvalds
501*e4e62d5fSRafael J. Wysocki button->last_state = !!acpi_lid_evaluate_state(device);
502c0968f0eSDmitry Torokhov button->last_time = ktime_get();
503c0968f0eSDmitry Torokhov acpi_lid_initialize_state(device);
504620e112cSThomas Renninger
5050d51157dSRafael J. Wysocki return 0;
506620e112cSThomas Renninger }
5070d51157dSRafael J. Wysocki
acpi_button_add(struct acpi_device * device)5081da177e4SLinus Torvalds static int acpi_button_add(struct acpi_device *device)
509593681e2SHans de Goede {
510d7cd0823SHans de Goede acpi_notify_handler handler;
5119e811e19SHans de Goede struct acpi_button *button;
5129e811e19SHans de Goede struct input_dev *input;
513c0968f0eSDmitry Torokhov const char *hid = acpi_device_hid(device);
5141da177e4SLinus Torvalds acpi_status status;
515d550d98dSPatrick Mochel char *name, *class;
5161da177e4SLinus Torvalds int error = 0;
517db89b4f0SPavel Machek
5181da177e4SLinus Torvalds if (!strcmp(hid, ACPI_BUTTON_HID_LID) &&
519c0968f0eSDmitry Torokhov lid_init_state == ACPI_BUTTON_LID_INIT_DISABLED)
520c0968f0eSDmitry Torokhov return -ENODEV;
521c0968f0eSDmitry Torokhov
522c0968f0eSDmitry Torokhov button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
523c0968f0eSDmitry Torokhov if (!button)
524c0968f0eSDmitry Torokhov return -ENOMEM;
525bf04a772SBjorn Helgaas
526bf04a772SBjorn Helgaas device->driver_data = button;
527bf04a772SBjorn Helgaas
528d68b597cSBjorn Helgaas button->input = input = input_allocate_device();
529d68b597cSBjorn Helgaas if (!input) {
5301da177e4SLinus Torvalds error = -ENOMEM;
531*e4e62d5fSRafael J. Wysocki goto err_free_button;
532bf04a772SBjorn Helgaas }
533bf04a772SBjorn Helgaas
5341da177e4SLinus Torvalds name = acpi_device_name(device);
535d68b597cSBjorn Helgaas class = acpi_device_class(device);
536d68b597cSBjorn Helgaas
5371da177e4SLinus Torvalds if (!strcmp(hid, ACPI_BUTTON_HID_POWER) ||
538*e4e62d5fSRafael J. Wysocki !strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
539bf04a772SBjorn Helgaas button->type = ACPI_BUTTON_TYPE_POWER;
540bf04a772SBjorn Helgaas handler = acpi_button_notify;
5411da177e4SLinus Torvalds strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
542bf04a772SBjorn Helgaas sprintf(class, "%s/%s",
5431da177e4SLinus Torvalds ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
544*e4e62d5fSRafael J. Wysocki } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) ||
545bf04a772SBjorn Helgaas !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
546bf04a772SBjorn Helgaas button->type = ACPI_BUTTON_TYPE_SLEEP;
5471da177e4SLinus Torvalds handler = acpi_button_notify;
54884d3f6b7SHans de Goede strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
5494be44fcdSLen Brown sprintf(class, "%s/%s",
550411e3216SRafael J. Wysocki ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
551c0968f0eSDmitry Torokhov } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
5521da177e4SLinus Torvalds button->type = ACPI_BUTTON_TYPE_LID;
5531da177e4SLinus Torvalds handler = acpi_lid_notify;
5540d51157dSRafael J. Wysocki strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
555c0968f0eSDmitry Torokhov sprintf(class, "%s/%s",
5560d51157dSRafael J. Wysocki ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
5570d51157dSRafael J. Wysocki input->open = acpi_lid_input_open;
5580d51157dSRafael J. Wysocki } else {
5590d51157dSRafael J. Wysocki pr_info("Unsupported hid [%s]\n", hid);
5600d51157dSRafael J. Wysocki error = -ENODEV;
561c0968f0eSDmitry Torokhov }
562bf04a772SBjorn Helgaas
563c0968f0eSDmitry Torokhov if (!error)
564bf04a772SBjorn Helgaas error = acpi_button_add_fs(device);
565c0968f0eSDmitry Torokhov
566c0968f0eSDmitry Torokhov if (error) {
567c0968f0eSDmitry Torokhov input_free_device(input);
5683b34e523SAndrey Borzenkov goto err_free_button;
569b34a8030SAlexey Starikovskiy }
5701da177e4SLinus Torvalds
571c0968f0eSDmitry Torokhov snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
572763f527bSLan Tianyu
5731da177e4SLinus Torvalds input->name = name;
574c0968f0eSDmitry Torokhov input->phys = button->phys;
575c0968f0eSDmitry Torokhov input->id.bustype = BUS_HOST;
576763f527bSLan Tianyu input->id.product = button->type;
5771da177e4SLinus Torvalds input->dev.parent = &device->dev;
578c0968f0eSDmitry Torokhov
579c0968f0eSDmitry Torokhov switch (button->type) {
580763f527bSLan Tianyu case ACPI_BUTTON_TYPE_POWER:
5811da177e4SLinus Torvalds input_set_capability(input, EV_KEY, KEY_POWER);
5821da177e4SLinus Torvalds break;
5831da177e4SLinus Torvalds
58484d3f6b7SHans de Goede case ACPI_BUTTON_TYPE_SLEEP:
585c0968f0eSDmitry Torokhov input_set_capability(input, EV_KEY, KEY_SLEEP);
586c0968f0eSDmitry Torokhov break;
587373cfc36SBjorn Helgaas
5880d51157dSRafael J. Wysocki case ACPI_BUTTON_TYPE_LID:
5890d51157dSRafael J. Wysocki input_set_capability(input, EV_SW, SW_LID);
5900d51157dSRafael J. Wysocki break;
5910d51157dSRafael J. Wysocki }
5920d51157dSRafael J. Wysocki
5930d51157dSRafael J. Wysocki input_set_drvdata(input, device);
5940d51157dSRafael J. Wysocki error = input_register_device(input);
5950d51157dSRafael J. Wysocki if (error)
5960d51157dSRafael J. Wysocki goto err_remove_fs;
5970d51157dSRafael J. Wysocki
5980d51157dSRafael J. Wysocki switch (device->device_type) {
5990d51157dSRafael J. Wysocki case ACPI_BUS_TYPE_POWER_BUTTON:
6000d51157dSRafael J. Wysocki status = acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
6010d51157dSRafael J. Wysocki acpi_button_event,
602*e4e62d5fSRafael J. Wysocki device);
6030d51157dSRafael J. Wysocki break;
6040d51157dSRafael J. Wysocki case ACPI_BUS_TYPE_SLEEP_BUTTON:
6050d51157dSRafael J. Wysocki status = acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
6060d51157dSRafael J. Wysocki acpi_button_event,
6070d51157dSRafael J. Wysocki device);
6080d51157dSRafael J. Wysocki break;
6090d51157dSRafael J. Wysocki default:
6100d51157dSRafael J. Wysocki status = acpi_install_notify_handler(device->handle,
6117e12715eSJesse Barnes ACPI_DEVICE_NOTIFY, handler,
6127e12715eSJesse Barnes device);
6137e12715eSJesse Barnes break;
6147e12715eSJesse Barnes }
6157e12715eSJesse Barnes if (ACPI_FAILURE(status)) {
6167e12715eSJesse Barnes error = -ENODEV;
6177e12715eSJesse Barnes goto err_input_unregister;
6181da177e4SLinus Torvalds }
61933e4f80eSRafael J. Wysocki
620411e3216SRafael J. Wysocki if (button->type == ACPI_BUTTON_TYPE_LID) {
621c0968f0eSDmitry Torokhov /*
6221da177e4SLinus Torvalds * This assumes there's only one lid device, or if there are
6230d51157dSRafael J. Wysocki * more we only care about the last one...
6240d51157dSRafael J. Wysocki */
625c0968f0eSDmitry Torokhov lid_device = device;
626c0968f0eSDmitry Torokhov }
627c0968f0eSDmitry Torokhov
628c0968f0eSDmitry Torokhov device_init_wakeup(&device->dev, true);
629c0968f0eSDmitry Torokhov pr_info("%s [%s]\n", name, acpi_device_bid(device));
6301da177e4SLinus Torvalds return 0;
6311da177e4SLinus Torvalds
6326c0eb5baSDawei Li err_input_unregister:
6331da177e4SLinus Torvalds input_unregister_device(input);
6341bce8113SBjorn Helgaas err_remove_fs:
6351da177e4SLinus Torvalds acpi_button_remove_fs(device);
6360d51157dSRafael J. Wysocki err_free_button:
6370d51157dSRafael J. Wysocki kfree(button);
6380d51157dSRafael J. Wysocki return error;
6390d51157dSRafael J. Wysocki }
6400d51157dSRafael J. Wysocki
acpi_button_remove(struct acpi_device * device)6410d51157dSRafael J. Wysocki static void acpi_button_remove(struct acpi_device *device)
6420d51157dSRafael J. Wysocki {
6430d51157dSRafael J. Wysocki struct acpi_button *button = acpi_driver_data(device);
6440d51157dSRafael J. Wysocki
6450d51157dSRafael J. Wysocki switch (device->device_type) {
6460d51157dSRafael J. Wysocki case ACPI_BUS_TYPE_POWER_BUTTON:
647*e4e62d5fSRafael J. Wysocki acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
648*e4e62d5fSRafael J. Wysocki acpi_button_event);
6490d51157dSRafael J. Wysocki break;
6500d51157dSRafael J. Wysocki case ACPI_BUS_TYPE_SLEEP_BUTTON:
6510d51157dSRafael J. Wysocki acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
6520d51157dSRafael J. Wysocki acpi_button_event);
6530d51157dSRafael J. Wysocki break;
654b34a8030SAlexey Starikovskiy default:
655c0968f0eSDmitry Torokhov acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
6561da177e4SLinus Torvalds button->type == ACPI_BUTTON_TYPE_LID ?
6571da177e4SLinus Torvalds acpi_lid_notify :
6581da177e4SLinus Torvalds acpi_button_notify);
659e4dca7b7SKees Cook break;
660e4dca7b7SKees Cook }
6613540c32aSLv Zheng acpi_os_wait_events_complete();
662065bd4d3SHans de Goede
6633540c32aSLv Zheng acpi_button_remove_fs(device);
664065bd4d3SHans de Goede input_unregister_device(button->input);
665065bd4d3SHans de Goede kfree(button);
666065bd4d3SHans de Goede }
6673540c32aSLv Zheng
param_set_lid_init_state(const char * val,const struct kernel_param * kp)668065bd4d3SHans de Goede static int param_set_lid_init_state(const char *val,
669065bd4d3SHans de Goede const struct kernel_param *kp)
6703540c32aSLv Zheng {
6713540c32aSLv Zheng int i;
6723540c32aSLv Zheng
673065bd4d3SHans de Goede i = sysfs_match_string(lid_init_state_str, val);
674065bd4d3SHans de Goede if (i < 0)
675065bd4d3SHans de Goede return i;
676065bd4d3SHans de Goede
677065bd4d3SHans de Goede lid_init_state = i;
678065bd4d3SHans de Goede pr_info("Initial lid state set to '%s'\n", lid_init_state_str[i]);
679065bd4d3SHans de Goede return 0;
680065bd4d3SHans de Goede }
681065bd4d3SHans de Goede
param_get_lid_init_state(char * buf,const struct kernel_param * kp)682065bd4d3SHans de Goede static int param_get_lid_init_state(char *buf, const struct kernel_param *kp)
683065bd4d3SHans de Goede {
684065bd4d3SHans de Goede int i, c = 0;
685065bd4d3SHans de Goede
686065bd4d3SHans de Goede for (i = 0; i < ARRAY_SIZE(lid_init_state_str); i++)
687065bd4d3SHans de Goede if (i == lid_init_state)
6883540c32aSLv Zheng c += sprintf(buf + c, "[%s] ", lid_init_state_str[i]);
6893540c32aSLv Zheng else
6903540c32aSLv Zheng c += sprintf(buf + c, "%s ", lid_init_state_str[i]);
6913540c32aSLv Zheng
6923540c32aSLv Zheng buf[c - 1] = '\n'; /* Replace the final space with a newline */
693ac1e55b1SArd Biesheuvel
694ac1e55b1SArd Biesheuvel return c;
695d7cd0823SHans de Goede }
696d7cd0823SHans de Goede
697d7cd0823SHans de Goede module_param_call(lid_init_state,
698d7cd0823SHans de Goede param_set_lid_init_state, param_get_lid_init_state,
699d7cd0823SHans de Goede NULL, 0644);
700d7cd0823SHans de Goede MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state");
701d7cd0823SHans de Goede
acpi_button_register_driver(struct acpi_driver * driver)702d7cd0823SHans de Goede static int acpi_button_register_driver(struct acpi_driver *driver)
703d7cd0823SHans de Goede {
704d7cd0823SHans de Goede const struct dmi_system_id *dmi_id;
705ac1e55b1SArd Biesheuvel
706ac1e55b1SArd Biesheuvel if (lid_init_state == -1) {
707ac1e55b1SArd Biesheuvel dmi_id = dmi_first_match(dmi_lid_quirks);
708ac1e55b1SArd Biesheuvel if (dmi_id)
709ac1e55b1SArd Biesheuvel lid_init_state = (long)dmi_id->driver_data;
710ac1e55b1SArd Biesheuvel else
711ac1e55b1SArd Biesheuvel lid_init_state = ACPI_BUTTON_LID_INIT_METHOD;
712ac1e55b1SArd Biesheuvel }
713ac1e55b1SArd Biesheuvel
714ac1e55b1SArd Biesheuvel /*
715ac1e55b1SArd Biesheuvel * Modules such as nouveau.ko and i915.ko have a link time dependency
716ac1e55b1SArd Biesheuvel * on acpi_lid_open(), and would therefore not be loadable on ACPI
717ac1e55b1SArd Biesheuvel * capable kernels booted in non-ACPI mode if the return value of
718ac1e55b1SArd Biesheuvel * acpi_bus_register_driver() is returned from here with ACPI disabled
719ac1e55b1SArd Biesheuvel * when this driver is built as a module.
720ac1e55b1SArd Biesheuvel */
721ac1e55b1SArd Biesheuvel if (acpi_disabled)
722ac1e55b1SArd Biesheuvel return 0;
723ac1e55b1SArd Biesheuvel
724ac1e55b1SArd Biesheuvel return acpi_bus_register_driver(driver);
725ac1e55b1SArd Biesheuvel }
726
acpi_button_unregister_driver(struct acpi_driver * driver)727 static void acpi_button_unregister_driver(struct acpi_driver *driver)
728 {
729 if (!acpi_disabled)
730 acpi_bus_unregister_driver(driver);
731 }
732
733 module_driver(acpi_button_driver, acpi_button_register_driver,
734 acpi_button_unregister_driver);
735