From 2bd30b8dc75b823dd7bbef9d7bc68e1fd7ecee5c Mon Sep 17 00:00:00 2001 From: Sang-Heon Jeon Date: Mon, 24 Aug 2026 01:18:14 +0900 Subject: coccinelle: alloc_cast: drop removed allocators - pci_alloc_consistent() and pci_zalloc_consistent() were removed by commit 7968778914e5 ("PCI: Remove the deprecated "pci-dma-compat.h" API") - kmem_alloc() was removed by commit f078d4ea8276 ("xfs: convert kmem_alloc() to kmalloc()") - kmem_zalloc() was removed by commit 10634530f7ba ("xfs: convert kmem_zalloc() to kzalloc()") - kmem_zone_alloc() and kmem_zone_zalloc() were removed by commit bae633a4a283 ("xfs: remove xfs_zone_{alloc,zalloc} helpers") So drop them from the rules. No functional change. Signed-off-by: Sang-Heon Jeon Signed-off-by: Julia Lawall --- drivers/acpi/button.c | 822 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 822 insertions(+) create mode 100644 drivers/acpi/button.c (limited to 'drivers/acpi/button.c') diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c new file mode 100644 index 000000000..3836ee75d --- /dev/null +++ b/drivers/acpi/button.c @@ -0,0 +1,822 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * button.c - ACPI Button Driver + * + * Copyright (C) 2001, 2002 Andy Grover + * Copyright (C) 2001, 2002 Paul Diefenbaugh + */ + +#define pr_fmt(fmt) "ACPI: button: " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define ACPI_BUTTON_CLASS "button" +#define ACPI_BUTTON_FILE_STATE "state" +#define ACPI_BUTTON_TYPE_UNKNOWN 0x00 +#define ACPI_BUTTON_NOTIFY_WAKE 0x02 +#define ACPI_BUTTON_NOTIFY_STATUS 0x80 + +#define ACPI_BUTTON_CLASS_POWER "button/power" +#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button" +#define ACPI_BUTTON_TYPE_POWER 0x01 + +#define ACPI_BUTTON_CLASS_SLEEP "button/sleep" +#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button" +#define ACPI_BUTTON_TYPE_SLEEP 0x03 + +#define ACPI_BUTTON_CLASS_LID "button/lid" +#define ACPI_BUTTON_SUBCLASS_LID "lid" +#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" +#define ACPI_BUTTON_TYPE_LID 0x05 + +enum { + ACPI_BUTTON_LID_INIT_IGNORE, + ACPI_BUTTON_LID_INIT_OPEN, + ACPI_BUTTON_LID_INIT_METHOD, + ACPI_BUTTON_LID_INIT_DISABLED, +}; + +static const char * const lid_init_state_str[] = { + [ACPI_BUTTON_LID_INIT_IGNORE] = "ignore", + [ACPI_BUTTON_LID_INIT_OPEN] = "open", + [ACPI_BUTTON_LID_INIT_METHOD] = "method", + [ACPI_BUTTON_LID_INIT_DISABLED] = "disabled", +}; + +MODULE_AUTHOR("Paul Diefenbaugh"); +MODULE_DESCRIPTION("ACPI Button Driver"); +MODULE_LICENSE("GPL"); + +static const struct acpi_device_id button_device_ids[] = { + {ACPI_BUTTON_HID_LID, ACPI_BUTTON_TYPE_LID}, + {ACPI_BUTTON_HID_SLEEP, ACPI_BUTTON_TYPE_SLEEP}, + {ACPI_BUTTON_HID_SLEEPF, ACPI_BUTTON_TYPE_SLEEP}, + {ACPI_BUTTON_HID_POWER, ACPI_BUTTON_TYPE_POWER}, + {ACPI_BUTTON_HID_POWERF, ACPI_BUTTON_TYPE_POWER}, + {"", 0}, +}; +MODULE_DEVICE_TABLE(acpi, button_device_ids); + +/* Please keep this list sorted alphabetically by vendor and model */ +static const struct dmi_system_id dmi_lid_quirks[] = { + { + /* GP-electronic T701, _LID method points to a floating GPIO */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), + DMI_MATCH(DMI_PRODUCT_NAME, "T701"), + DMI_MATCH(DMI_BIOS_VERSION, "BYT70A.YNCHENG.WIN.007"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_DISABLED, + }, + { + /* Nextbook Ares 8A tablet, _LID device always reports lid closed */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), + DMI_MATCH(DMI_PRODUCT_NAME, "CherryTrail"), + DMI_MATCH(DMI_BIOS_VERSION, "M882"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_DISABLED, + }, + { + /* + * Lenovo Yoga 9 14ITL5, initial notification of the LID device + * never happens. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "82BG"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, + }, + { + /* + * Medion Akoya E2215T, notification of the LID device only + * happens on close, not on open and _LID always returns closed. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), + DMI_MATCH(DMI_PRODUCT_NAME, "E2215T"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, + }, + { + /* + * Medion Akoya E2228T, notification of the LID device only + * happens on close, not on open and _LID always returns closed. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), + DMI_MATCH(DMI_PRODUCT_NAME, "E2228T"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, + }, + { + /* + * Razer Blade Stealth 13 late 2019, notification of the LID device + * only happens on close, not on open and _LID always returns closed. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Razer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Razer Blade Stealth 13 Late 2019"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, + }, + { + /* + * Samsung galaxybook2 ,initial _LID device notification returns + * lid closed. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "750XED"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, + }, + {} +}; + +static int acpi_button_probe(struct platform_device *pdev); +static void acpi_button_remove(struct platform_device *pdev); + +#ifdef CONFIG_PM_SLEEP +static int acpi_button_suspend(struct device *dev); +static int acpi_button_resume(struct device *dev); +#else +#define acpi_button_suspend NULL +#define acpi_button_resume NULL +#endif +static SIMPLE_DEV_PM_OPS(acpi_button_pm, acpi_button_suspend, acpi_button_resume); + +static struct platform_driver acpi_button_driver = { + .probe = acpi_button_probe, + .remove = acpi_button_remove, + .driver = { + .name = "acpi-button", + .acpi_match_table = button_device_ids, + .pm = &acpi_button_pm, + }, +}; + +struct acpi_button { + struct acpi_device *adev; + struct device *dev; /* physical button device */ + unsigned int type; + struct input_dev *input; + const char *class; /* for netlink messages */ + char phys[32]; /* for input device */ + unsigned long pushed; + bool last_state; + ktime_t last_time; + bool suspended; + bool lid_state_initialized; + bool gpe_enabled; +}; + +static long lid_init_state = -1; + +static unsigned long lid_report_interval __read_mostly = 500; +module_param(lid_report_interval, ulong, 0644); +MODULE_PARM_DESC(lid_report_interval, "Interval (ms) between lid key events"); + +/* FS Interface (/proc) */ +static struct proc_dir_entry *acpi_button_dir; +static struct proc_dir_entry *acpi_lid_dir; + +static int acpi_lid_evaluate_state(acpi_handle lid_handle) +{ + unsigned long long lid_state; + acpi_status status; + + status = acpi_evaluate_integer(lid_handle, "_LID", NULL, &lid_state); + if (ACPI_FAILURE(status)) + return -ENODEV; + + return !!lid_state; +} + +static void acpi_lid_notify_state(struct acpi_button *button, bool state) +{ + struct acpi_device *device = button->adev; + ktime_t next_report; + bool do_update; + + /* + * In lid_init_state=ignore mode, if user opens/closes lid + * frequently with "open" missing, and "last_time" is also updated + * frequently, "close" cannot be delivered to the userspace. + * So "last_time" is only updated after a timeout or an actual + * switch. + */ + do_update = lid_init_state != ACPI_BUTTON_LID_INIT_IGNORE || + button->last_state != state; + next_report = ktime_add(button->last_time, + ms_to_ktime(lid_report_interval)); + if (button->last_state == state && + ktime_after(ktime_get(), next_report)) { + /* Complain about the buggy firmware. */ + pr_warn_once(FW_BUG "Unexpected lid state reported by firmware\n"); + + /* + * Send the unreliable complement switch event: + * + * On most platforms, the lid device is reliable. However + * there are exceptions: + * 1. Platforms returning initial lid state as "close" by + * default after booting/resuming: + * https://bugzilla.kernel.org/show_bug.cgi?id=89211 + * https://bugzilla.kernel.org/show_bug.cgi?id=106151 + * 2. Platforms never reporting "open" events: + * https://bugzilla.kernel.org/show_bug.cgi?id=106941 + * On these buggy platforms, the usage model of the ACPI + * lid device actually is: + * 1. The initial returning value of _LID may not be + * reliable. + * 2. The open event may not be reliable. + * 3. The close event is reliable. + * + * But SW_LID is typed as input switch event, the input + * layer checks if the event is redundant. Hence if the + * state is not switched, the userspace cannot see this + * platform triggered reliable event. By inserting a + * complement switch event, it then is guaranteed that the + * platform triggered reliable one can always be seen by + * the userspace. + */ + if (lid_init_state == ACPI_BUTTON_LID_INIT_IGNORE) { + do_update = true; + /* + * Do generate complement switch event for "close" + * as "close" is reliable and wrong "open" won't + * trigger unexpected behaviors. + * Do not generate complement switch event for + * "open" as "open" is not reliable and wrong + * "close" will trigger unexpected behaviors. + */ + if (!state) { + input_report_switch(button->input, + SW_LID, state); + input_sync(button->input); + } + } + } + /* Send the platform triggered reliable event */ + if (do_update) { + acpi_handle_debug(device->handle, "ACPI LID %s\n", + state ? "open" : "closed"); + input_report_switch(button->input, SW_LID, !state); + input_sync(button->input); + button->last_state = state; + button->last_time = ktime_get(); + } +} + +static int __maybe_unused acpi_button_state_seq_show(struct seq_file *seq, + void *offset) +{ + struct acpi_button *button = seq->private; + int state; + + state = acpi_lid_evaluate_state(button->adev->handle); + seq_printf(seq, "state: %s\n", + state < 0 ? "unsupported" : (state ? "open" : "closed")); + return 0; +} + +static int acpi_lid_add_fs(struct acpi_button *button) +{ + struct acpi_device *device = button->adev; + struct proc_dir_entry *entry = NULL; + + if (acpi_button_dir || acpi_lid_dir) { + pr_info("More than one Lid device found!\n"); + return -EEXIST; + } + + /* create /proc/acpi/button */ + acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); + if (!acpi_button_dir) + return -ENODEV; + + /* create /proc/acpi/button/lid */ + acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); + if (!acpi_lid_dir) + goto remove_button_dir; + + /* create /proc/acpi/button/lid/LID/ */ + acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir); + if (!acpi_device_dir(device)) + goto remove_lid_dir; + + /* create /proc/acpi/button/lid/LID/state */ + entry = proc_create_single_data(ACPI_BUTTON_FILE_STATE, S_IRUGO, + acpi_device_dir(device), acpi_button_state_seq_show, + button); + if (!entry) + goto remove_dev_dir; + + return 0; + +remove_dev_dir: + remove_proc_entry(acpi_device_bid(device), acpi_lid_dir); + acpi_device_dir(device) = NULL; +remove_lid_dir: + remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); + acpi_lid_dir = NULL; +remove_button_dir: + remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); + acpi_button_dir = NULL; + return -ENODEV; +} + +static void acpi_lid_remove_fs(void *data) +{ + struct acpi_button *button = data; + struct acpi_device *device = button->adev; + + remove_proc_entry(ACPI_BUTTON_FILE_STATE, + acpi_device_dir(device)); + remove_proc_entry(acpi_device_bid(device), + acpi_lid_dir); + acpi_device_dir(device) = NULL; + remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); + acpi_lid_dir = NULL; + remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); + acpi_button_dir = NULL; +} + +static int devm_acpi_lid_add_fs(struct device *dev, struct acpi_button *button) +{ + int ret; + + ret = acpi_lid_add_fs(button); + if (ret) + return ret; + + return devm_add_action_or_reset(dev, acpi_lid_remove_fs, button); +} + +static acpi_handle saved_lid_handle; +static DEFINE_MUTEX(acpi_lid_lock); + +static void acpi_lid_save(struct acpi_device *adev) +{ + guard(mutex)(&acpi_lid_lock); + + saved_lid_handle = adev->handle; +} + +static void acpi_lid_forget(struct acpi_device *adev) +{ + guard(mutex)(&acpi_lid_lock); + + if (saved_lid_handle == adev->handle) + saved_lid_handle = NULL; +} + +/* Driver Interface */ +int acpi_lid_open(void) +{ + guard(mutex)(&acpi_lid_lock); + + if (!saved_lid_handle) + return -ENODEV; + + return acpi_lid_evaluate_state(saved_lid_handle); +} +EXPORT_SYMBOL(acpi_lid_open); + +static void acpi_lid_update_state(struct acpi_button *button, bool signal_wakeup) +{ + int state; + + state = acpi_lid_evaluate_state(button->adev->handle); + if (state < 0) + return; + + if (state && signal_wakeup) + acpi_pm_wakeup_event(button->dev); + + acpi_lid_notify_state(button, state); +} + +static void acpi_lid_initialize_state(struct acpi_button *button) +{ + switch (lid_init_state) { + case ACPI_BUTTON_LID_INIT_OPEN: + acpi_lid_notify_state(button, true); + break; + case ACPI_BUTTON_LID_INIT_METHOD: + acpi_lid_update_state(button, false); + break; + case ACPI_BUTTON_LID_INIT_IGNORE: + default: + break; + } + + button->lid_state_initialized = true; +} + +static void acpi_lid_notify(acpi_handle handle, u32 event, void *data) +{ + struct acpi_button *button = data; + struct acpi_device *device = button->adev; + + if (event != ACPI_BUTTON_NOTIFY_STATUS) { + acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n", + event); + return; + } + + if (!button->lid_state_initialized) + return; + + acpi_lid_update_state(button, true); +} + +static void acpi_button_notify(acpi_handle handle, u32 event, void *data) +{ + struct acpi_button *button = data; + struct acpi_device *device = button->adev; + struct input_dev *input; + int keycode; + + switch (event) { + case ACPI_BUTTON_NOTIFY_STATUS: + break; + case ACPI_BUTTON_NOTIFY_WAKE: + break; + default: + acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n", + event); + return; + } + + acpi_pm_wakeup_event(button->dev); + + if (button->suspended || event == ACPI_BUTTON_NOTIFY_WAKE) + return; + + input = button->input; + keycode = test_bit(KEY_SLEEP, input->keybit) ? KEY_SLEEP : KEY_POWER; + + input_report_key(input, keycode, 1); + input_sync(input); + input_report_key(input, keycode, 0); + input_sync(input); + + acpi_bus_generate_netlink_event(button->class, dev_name(&device->dev), + event, ++button->pushed); +} + +static void acpi_button_notify_run(void *data) +{ + acpi_button_notify(NULL, ACPI_BUTTON_NOTIFY_STATUS, data); +} + +static u32 acpi_button_event(void *data) +{ + acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_button_notify_run, data); + return ACPI_INTERRUPT_HANDLED; +} + +#ifdef CONFIG_PM_SLEEP +static int acpi_button_suspend(struct device *dev) +{ + struct acpi_button *button = dev_get_drvdata(dev); + + button->suspended = true; + return 0; +} + +static int acpi_button_resume(struct device *dev) +{ + struct acpi_button *button = dev_get_drvdata(dev); + struct input_dev *input; + + button->suspended = false; + if (button->type == ACPI_BUTTON_TYPE_LID) { + button->last_state = !!acpi_lid_evaluate_state(ACPI_HANDLE(dev)); + button->last_time = ktime_get(); + acpi_lid_initialize_state(button); + } + + if (button->type == ACPI_BUTTON_TYPE_POWER) { + input = button->input; + input_report_key(input, KEY_WAKEUP, 1); + input_sync(input); + input_report_key(input, KEY_WAKEUP, 0); + input_sync(input); + } + return 0; +} +#endif + +static int acpi_lid_input_open(struct input_dev *input) +{ + struct acpi_button *button = input_get_drvdata(input); + + button->last_state = !!acpi_lid_evaluate_state(button->adev->handle); + button->last_time = ktime_get(); + acpi_lid_initialize_state(button); + + return 0; +} + +static acpi_notify_handler acpi_button_notify_handler(struct acpi_button *button) +{ + if (button->type == ACPI_BUTTON_TYPE_LID) + return acpi_lid_notify; + + return acpi_button_notify; +} + +static void acpi_button_wakeup_cleanup(void *data) +{ + device_init_wakeup(data, false); +} + +static int devm_acpi_button_init_wakeup(struct device *dev) +{ + device_init_wakeup(dev, true); + return devm_add_action_or_reset(dev, acpi_button_wakeup_cleanup, dev); +} + +static void acpi_button_remove_event_handler(void *data) +{ + struct acpi_button *button = data; + struct acpi_device *adev = button->adev; + + switch (adev->device_type) { + case ACPI_BUS_TYPE_POWER_BUTTON: + acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, + acpi_button_event); + break; + + case ACPI_BUS_TYPE_SLEEP_BUTTON: + acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, + acpi_button_event); + break; + + default: + if (button->gpe_enabled) { + dev_dbg(button->dev, "Disabling ACPI GPE%02llx\n", + adev->wakeup.gpe_number); + acpi_disable_gpe(adev->wakeup.gpe_device, + adev->wakeup.gpe_number); + } + acpi_remove_notify_handler(adev->handle, ACPI_ALL_NOTIFY, + acpi_button_notify_handler(button)); + break; + } + acpi_os_wait_events_complete(); +} + +static int acpi_button_add_fixed_event_handler(u32 event, + struct acpi_button *button) +{ + acpi_status status; + + status = acpi_install_fixed_event_handler(event, acpi_button_event, button); + if (ACPI_FAILURE(status)) + return -ENODEV; + + return 0; +} + +static int acpi_button_add_event_handler(struct acpi_button *button) +{ + struct acpi_device *adev = button->adev; + acpi_status status; + + if (adev->device_type == ACPI_BUS_TYPE_POWER_BUTTON) + return acpi_button_add_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, + button); + + if (adev->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) + return acpi_button_add_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, + button); + + status = acpi_install_notify_handler(adev->handle, ACPI_ALL_NOTIFY, + acpi_button_notify_handler(button), + button); + if (ACPI_FAILURE(status)) + return -ENODEV; + + if (!adev->wakeup.flags.valid) + return 0; + + /* + * If the wakeup GPE has a handler method, enable it in case it is also + * used for signaling runtime events. + */ + status = acpi_enable_gpe_cond(adev->wakeup.gpe_device, + adev->wakeup.gpe_number, + ACPI_GPE_DISPATCH_METHOD); + button->gpe_enabled = ACPI_SUCCESS(status); + if (button->gpe_enabled) + dev_dbg(button->dev, "Enabled ACPI GPE%02llx\n", + adev->wakeup.gpe_number); + + return 0; +} + +static int devm_acpi_button_add_event_handler(struct device *dev, + struct acpi_button *button) +{ + int ret; + + ret = acpi_button_add_event_handler(button); + if (ret) + return ret; + + return devm_add_action_or_reset(dev, acpi_button_remove_event_handler, + button); +} + +static int acpi_button_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct acpi_device *device = ACPI_COMPANION(dev); + const struct acpi_device_id *id; + struct acpi_button *button; + struct input_dev *input; + u8 button_type; + int error = 0; + + id = acpi_match_acpi_device(button_device_ids, device); + if (!id || strcmp(acpi_device_hid(device), id->id)) + return dev_err_probe(dev, -ENODEV, "Unsupported device\n"); + + button_type = id->driver_data; + if (button_type == ACPI_BUTTON_TYPE_LID && + lid_init_state == ACPI_BUTTON_LID_INIT_DISABLED) + return -ENODEV; + + button = devm_kzalloc(dev, sizeof(*button), GFP_KERNEL); + if (!button) + return -ENOMEM; + + platform_set_drvdata(pdev, button); + + button->dev = dev; + button->adev = device; + input = devm_input_allocate_device(dev); + if (!input) + return -ENOMEM; + + button->input = input; + button->type = button_type; + + switch (button_type) { + case ACPI_BUTTON_TYPE_LID: + button->class = ACPI_BUTTON_CLASS_LID; + + input->name = ACPI_BUTTON_DEVICE_NAME_LID; + input_set_capability(input, EV_SW, SW_LID); + input->open = acpi_lid_input_open; + + error = devm_acpi_lid_add_fs(dev, button); + if (error) + return error; + + break; + + case ACPI_BUTTON_TYPE_POWER: + button->class = ACPI_BUTTON_CLASS_POWER; + + input->name = ACPI_BUTTON_DEVICE_NAME_POWER; + input_set_capability(input, EV_KEY, KEY_POWER); + input_set_capability(input, EV_KEY, KEY_WAKEUP); + break; + + case ACPI_BUTTON_TYPE_SLEEP: + button->class = ACPI_BUTTON_CLASS_SLEEP; + + input->name = ACPI_BUTTON_DEVICE_NAME_SLEEP; + input_set_capability(input, EV_KEY, KEY_SLEEP); + break; + + default: + return dev_err_probe(dev, -ENODEV, "Unrecognized button type\n"); + } + + snprintf(button->phys, sizeof(button->phys), "%s/button/input0", + acpi_device_hid(device)); + + input->phys = button->phys; + input->id.bustype = BUS_HOST; + input->id.product = button_type; + + input_set_drvdata(input, button); + error = input_register_device(input); + if (error) + return error; + + error = devm_acpi_button_init_wakeup(dev); + if (error) + return error; + + error = devm_acpi_button_add_event_handler(dev, button); + if (error) + return error; + + if (button_type == ACPI_BUTTON_TYPE_LID) { + /* + * This assumes there's only one lid device, or if there are + * more we only care about the last one... + */ + acpi_lid_save(device); + } + + pr_info("%s [%s]\n", input->name, acpi_device_bid(device)); + + return 0; +} + +static void acpi_button_remove(struct platform_device *pdev) +{ + struct acpi_button *button = platform_get_drvdata(pdev); + + if (button->type == ACPI_BUTTON_TYPE_LID) + acpi_lid_forget(button->adev); +} + +static int param_set_lid_init_state(const char *val, + const struct kernel_param *kp) +{ + int i; + + i = sysfs_match_string(lid_init_state_str, val); + if (i < 0) + return i; + + lid_init_state = i; + pr_info("Initial lid state set to '%s'\n", lid_init_state_str[i]); + return 0; +} + +static int param_get_lid_init_state(char *buf, const struct kernel_param *kp) +{ + int i, c = 0; + + for (i = 0; i < ARRAY_SIZE(lid_init_state_str); i++) + if (i == lid_init_state) + c += sprintf(buf + c, "[%s] ", lid_init_state_str[i]); + else + c += sprintf(buf + c, "%s ", lid_init_state_str[i]); + + buf[c - 1] = '\n'; /* Replace the final space with a newline */ + + return c; +} + +module_param_call(lid_init_state, + param_set_lid_init_state, param_get_lid_init_state, + NULL, 0644); +MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state"); + +static int __init acpi_button_init(void) +{ + const struct dmi_system_id *dmi_id; + + if (lid_init_state == -1) { + dmi_id = dmi_first_match(dmi_lid_quirks); + if (dmi_id) + lid_init_state = (long)dmi_id->driver_data; + else + lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; + } + + /* + * Modules such as nouveau.ko and i915.ko have a link time dependency + * on acpi_lid_open(), and would therefore not be loadable on ACPI + * capable kernels booted in non-ACPI mode if the return value of + * platform_driver_register() is returned from here with ACPI disabled + * when this driver is built as a module. + */ + if (acpi_disabled) + return 0; + + return platform_driver_register(&acpi_button_driver); +} + +static void __exit acpi_button_exit(void) +{ + if (!acpi_disabled) + platform_driver_unregister(&acpi_button_driver); +} + +module_init(acpi_button_init); +module_exit(acpi_button_exit); -- cgit v1.3.1