[ACPI] restore /proc/acpi/button/ (ala 2.6.12) (b34a8030) · Commits · e / devices / android_kernel_samsung_universal8895

drivers/acpi/button.c

+205 −1

Original line number	Diff line number	Diff line
		@@ -26,6 +26,9 @@
		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/init.h>
		#include <linux/types.h>
		#include <linux/proc_fs.h>
		#include <linux/seq_file.h>
		#include <acpi/acpi_bus.h>
		#include <acpi/acpi_drivers.h>

		@@ -33,6 +36,9 @@
		#define ACPI_BUTTON_COMPONENT 0x00080000
		#define ACPI_BUTTON_DRIVER_NAME "ACPI Button Driver"
		#define ACPI_BUTTON_CLASS "button"
		#define ACPI_BUTTON_FILE_INFO "info"
		#define ACPI_BUTTON_FILE_STATE "state"
		#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
		#define ACPI_BUTTON_NOTIFY_STATUS 0x80

		#define ACPI_BUTTON_SUBCLASS_POWER "power"
		@@ -64,6 +70,8 @@ MODULE_LICENSE("GPL");

		static int acpi_button_add (struct acpi_device *device);
		static int acpi_button_remove (struct acpi_device *device, int type);
		static int acpi_button_info_open_fs(struct inode inode, struct file file);
		static int acpi_button_state_open_fs(struct inode inode, struct file file);

		static struct acpi_driver acpi_button_driver = {
		.name = ACPI_BUTTON_DRIVER_NAME,
		@@ -82,6 +90,179 @@ struct acpi_button {
		unsigned long pushed;
		};

		static struct file_operations acpi_button_info_fops = {
		.open = acpi_button_info_open_fs,
		.read = seq_read,
		.llseek = seq_lseek,
		.release = single_release,
		};

		static struct file_operations acpi_button_state_fops = {
		.open = acpi_button_state_open_fs,
		.read = seq_read,
		.llseek = seq_lseek,
		.release = single_release,
		};
		/* --------------------------------------------------------------------------
		FS Interface (/proc)
		-------------------------------------------------------------------------- */

		static struct proc_dir_entry *acpi_button_dir;

		static int acpi_button_info_seq_show(struct seq_file seq, void offset)
		{
		struct acpi_button button = (struct acpi_button ) seq->private;

		ACPI_FUNCTION_TRACE("acpi_button_info_seq_show");

		if (!button \|\| !button->device)
		return_VALUE(0);

		seq_printf(seq, "type: %s\n",
		acpi_device_name(button->device));

		return_VALUE(0);
		}

		static int acpi_button_info_open_fs(struct inode inode, struct file file)
		{
		return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
		}

		static int acpi_button_state_seq_show(struct seq_file seq, void offset)
		{
		struct acpi_button button = (struct acpi_button ) seq->private;
		acpi_status status;
		unsigned long state;

		ACPI_FUNCTION_TRACE("acpi_button_state_seq_show");

		if (!button \|\| !button->device)
		return_VALUE(0);

		status = acpi_evaluate_integer(button->handle,"_LID",NULL,&state);
		if (ACPI_FAILURE(status)) {
		seq_printf(seq, "state: unsupported\n");
		}
		else{
		seq_printf(seq, "state: %s\n", (state ? "open" : "closed"));
		}

		return_VALUE(0);
		}

		static int acpi_button_state_open_fs(struct inode inode, struct file file)
		{
		return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
		}

		static struct proc_dir_entry *acpi_power_dir;
		static struct proc_dir_entry *acpi_sleep_dir;
		static struct proc_dir_entry *acpi_lid_dir;

		static int
		acpi_button_add_fs (
		struct acpi_device *device)
		{
		struct proc_dir_entry *entry = NULL;
		struct acpi_button *button = NULL;

		ACPI_FUNCTION_TRACE("acpi_button_add_fs");

		if (!device \|\| !acpi_driver_data(device))
		return_VALUE(-EINVAL);

		button = acpi_driver_data(device);

		switch (button->type) {
		case ACPI_BUTTON_TYPE_POWER:
		case ACPI_BUTTON_TYPE_POWERF:
		if (!acpi_power_dir)
		acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
		acpi_button_dir);
		entry = acpi_power_dir;
		break;
		case ACPI_BUTTON_TYPE_SLEEP:
		case ACPI_BUTTON_TYPE_SLEEPF:
		if (!acpi_sleep_dir)
		acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
		acpi_button_dir);
		entry = acpi_sleep_dir;
		break;
		case ACPI_BUTTON_TYPE_LID:
		if (!acpi_lid_dir)
		acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
		acpi_button_dir);
		entry = acpi_lid_dir;
		break;
		}

		if (!entry)
		return_VALUE(-ENODEV);
		entry->owner = THIS_MODULE;

		acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
		if (!acpi_device_dir(device))
		return_VALUE(-ENODEV);
		acpi_device_dir(device)->owner = THIS_MODULE;

		/* 'info' [R] */
		entry = create_proc_entry(ACPI_BUTTON_FILE_INFO,
		S_IRUGO, acpi_device_dir(device));
		if (!entry)
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
		"Unable to create '%s' fs entry\n",
		ACPI_BUTTON_FILE_INFO));
		else {
		entry->proc_fops = &acpi_button_info_fops;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
		}

		/* show lid state [R] */
		if (button->type == ACPI_BUTTON_TYPE_LID) {
		entry = create_proc_entry(ACPI_BUTTON_FILE_STATE,
		S_IRUGO, acpi_device_dir(device));
		if (!entry)
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
		"Unable to create '%s' fs entry\n",
		ACPI_BUTTON_FILE_INFO));
		else {
		entry->proc_fops = &acpi_button_state_fops;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
		}
		}

		return_VALUE(0);
		}


		static int
		acpi_button_remove_fs (
		struct acpi_device *device)
		{
		struct acpi_button *button = NULL;

		ACPI_FUNCTION_TRACE("acpi_button_remove_fs");

		button = acpi_driver_data(device);
		if (acpi_device_dir(device)) {
		if (button->type == ACPI_BUTTON_TYPE_LID)
		remove_proc_entry(ACPI_BUTTON_FILE_STATE,
		acpi_device_dir(device));
		remove_proc_entry(ACPI_BUTTON_FILE_INFO,
		acpi_device_dir(device));

		remove_proc_entry(acpi_device_bid(device),
		acpi_device_dir(device)->parent);
		acpi_device_dir(device) = NULL;
		}

		return_VALUE(0);
		}


		/* --------------------------------------------------------------------------
		Driver Interface
		-------------------------------------------------------------------------- */
		@@ -121,7 +302,8 @@ acpi_button_notify_fixed (

		ACPI_FUNCTION_TRACE("acpi_button_notify_fixed");

		BUG_ON(!button);
		if (!button)
		return_ACPI_STATUS(AE_BAD_PARAMETER);

		acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button);

		@@ -197,6 +379,10 @@ acpi_button_add (
		goto end;
		}

		result = acpi_button_add_fs(device);
		if (result)
		goto end;

		switch (button->type) {
		case ACPI_BUTTON_TYPE_POWERF:
		status = acpi_install_fixed_event_handler (
		@@ -240,6 +426,7 @@ acpi_button_add (

		end:
		if (result) {
		acpi_button_remove_fs(device);
		kfree(button);
		}

		@@ -280,6 +467,8 @@ acpi_button_remove (struct acpi_device *device, int type)
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
		"Error removing notify handler\n"));

		acpi_button_remove_fs(device);

		kfree(button);

		return_VALUE(0);
		@@ -293,14 +482,20 @@ acpi_button_init (void)

		ACPI_FUNCTION_TRACE("acpi_button_init");

		acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
		if (!acpi_button_dir)
		return_VALUE(-ENODEV);
		acpi_button_dir->owner = THIS_MODULE;
		result = acpi_bus_register_driver(&acpi_button_driver);
		if (result < 0) {
		remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
		return_VALUE(-ENODEV);
		}

		return_VALUE(0);
		}


		static void __exit
		acpi_button_exit (void)
		{
		@@ -308,8 +503,17 @@ acpi_button_exit (void)

		acpi_bus_unregister_driver(&acpi_button_driver);

		if (acpi_power_dir)
		remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
		if (acpi_sleep_dir)
		remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
		if (acpi_lid_dir)
		remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
		remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);

		return_VOID;
		}


		module_init(acpi_button_init);
		module_exit(acpi_button_exit);