mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-22 00:40:03 +00:00
![Gustavo A. R. Silva](/assets/img/avatar_default.png)
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
658 lines
17 KiB
C
658 lines
17 KiB
C
/*
|
|
* dock.c - ACPI dock station driver
|
|
*
|
|
* Copyright (C) 2006, 2014, Intel Corp.
|
|
* Author: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
|
|
* Rafael J. Wysocki <rafael.j.wysocki@intel.com>
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/acpi.h>
|
|
|
|
#include "internal.h"
|
|
|
|
ACPI_MODULE_NAME("dock");
|
|
|
|
static bool immediate_undock = 1;
|
|
module_param(immediate_undock, bool, 0644);
|
|
MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to "
|
|
"undock immediately when the undock button is pressed, 0 will cause"
|
|
" the driver to wait for userspace to write the undock sysfs file "
|
|
" before undocking");
|
|
|
|
struct dock_station {
|
|
acpi_handle handle;
|
|
unsigned long last_dock_time;
|
|
u32 flags;
|
|
struct list_head dependent_devices;
|
|
|
|
struct list_head sibling;
|
|
struct platform_device *dock_device;
|
|
};
|
|
static LIST_HEAD(dock_stations);
|
|
static int dock_station_count;
|
|
|
|
struct dock_dependent_device {
|
|
struct list_head list;
|
|
struct acpi_device *adev;
|
|
};
|
|
|
|
#define DOCK_DOCKING 0x00000001
|
|
#define DOCK_UNDOCKING 0x00000002
|
|
#define DOCK_IS_DOCK 0x00000010
|
|
#define DOCK_IS_ATA 0x00000020
|
|
#define DOCK_IS_BAT 0x00000040
|
|
#define DOCK_EVENT 3
|
|
#define UNDOCK_EVENT 2
|
|
|
|
enum dock_callback_type {
|
|
DOCK_CALL_HANDLER,
|
|
DOCK_CALL_FIXUP,
|
|
DOCK_CALL_UEVENT,
|
|
};
|
|
|
|
/*****************************************************************************
|
|
* Dock Dependent device functions *
|
|
*****************************************************************************/
|
|
/**
|
|
* add_dock_dependent_device - associate a device with the dock station
|
|
* @ds: Dock station.
|
|
* @adev: Dependent ACPI device object.
|
|
*
|
|
* Add the dependent device to the dock's dependent device list.
|
|
*/
|
|
static int add_dock_dependent_device(struct dock_station *ds,
|
|
struct acpi_device *adev)
|
|
{
|
|
struct dock_dependent_device *dd;
|
|
|
|
dd = kzalloc(sizeof(*dd), GFP_KERNEL);
|
|
if (!dd)
|
|
return -ENOMEM;
|
|
|
|
dd->adev = adev;
|
|
INIT_LIST_HEAD(&dd->list);
|
|
list_add_tail(&dd->list, &ds->dependent_devices);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dock_hotplug_event(struct dock_dependent_device *dd, u32 event,
|
|
enum dock_callback_type cb_type)
|
|
{
|
|
struct acpi_device *adev = dd->adev;
|
|
|
|
acpi_lock_hp_context();
|
|
|
|
if (!adev->hp)
|
|
goto out;
|
|
|
|
if (cb_type == DOCK_CALL_FIXUP) {
|
|
void (*fixup)(struct acpi_device *);
|
|
|
|
fixup = adev->hp->fixup;
|
|
if (fixup) {
|
|
acpi_unlock_hp_context();
|
|
fixup(adev);
|
|
return;
|
|
}
|
|
} else if (cb_type == DOCK_CALL_UEVENT) {
|
|
void (*uevent)(struct acpi_device *, u32);
|
|
|
|
uevent = adev->hp->uevent;
|
|
if (uevent) {
|
|
acpi_unlock_hp_context();
|
|
uevent(adev, event);
|
|
return;
|
|
}
|
|
} else {
|
|
int (*notify)(struct acpi_device *, u32);
|
|
|
|
notify = adev->hp->notify;
|
|
if (notify) {
|
|
acpi_unlock_hp_context();
|
|
notify(adev, event);
|
|
return;
|
|
}
|
|
}
|
|
|
|
out:
|
|
acpi_unlock_hp_context();
|
|
}
|
|
|
|
static struct dock_station *find_dock_station(acpi_handle handle)
|
|
{
|
|
struct dock_station *ds;
|
|
|
|
list_for_each_entry(ds, &dock_stations, sibling)
|
|
if (ds->handle == handle)
|
|
return ds;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* find_dock_dependent_device - get a device dependent on this dock
|
|
* @ds: the dock station
|
|
* @adev: ACPI device object to find.
|
|
*
|
|
* iterate over the dependent device list for this dock. If the
|
|
* dependent device matches the handle, return.
|
|
*/
|
|
static struct dock_dependent_device *
|
|
find_dock_dependent_device(struct dock_station *ds, struct acpi_device *adev)
|
|
{
|
|
struct dock_dependent_device *dd;
|
|
|
|
list_for_each_entry(dd, &ds->dependent_devices, list)
|
|
if (adev == dd->adev)
|
|
return dd;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void register_dock_dependent_device(struct acpi_device *adev,
|
|
acpi_handle dshandle)
|
|
{
|
|
struct dock_station *ds = find_dock_station(dshandle);
|
|
|
|
if (ds && !find_dock_dependent_device(ds, adev))
|
|
add_dock_dependent_device(ds, adev);
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Dock functions *
|
|
*****************************************************************************/
|
|
|
|
/**
|
|
* is_dock_device - see if a device is on a dock station
|
|
* @adev: ACPI device object to check.
|
|
*
|
|
* If this device is either the dock station itself,
|
|
* or is a device dependent on the dock station, then it
|
|
* is a dock device
|
|
*/
|
|
int is_dock_device(struct acpi_device *adev)
|
|
{
|
|
struct dock_station *dock_station;
|
|
|
|
if (!dock_station_count)
|
|
return 0;
|
|
|
|
if (acpi_dock_match(adev->handle))
|
|
return 1;
|
|
|
|
list_for_each_entry(dock_station, &dock_stations, sibling)
|
|
if (find_dock_dependent_device(dock_station, adev))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(is_dock_device);
|
|
|
|
/**
|
|
* dock_present - see if the dock station is present.
|
|
* @ds: the dock station
|
|
*
|
|
* execute the _STA method. note that present does not
|
|
* imply that we are docked.
|
|
*/
|
|
static int dock_present(struct dock_station *ds)
|
|
{
|
|
unsigned long long sta;
|
|
acpi_status status;
|
|
|
|
if (ds) {
|
|
status = acpi_evaluate_integer(ds->handle, "_STA", NULL, &sta);
|
|
if (ACPI_SUCCESS(status) && sta)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* hot_remove_dock_devices - Remove dock station devices.
|
|
* @ds: Dock station.
|
|
*/
|
|
static void hot_remove_dock_devices(struct dock_station *ds)
|
|
{
|
|
struct dock_dependent_device *dd;
|
|
|
|
/*
|
|
* Walk the list in reverse order so that devices that have been added
|
|
* last are removed first (in case there are some indirect dependencies
|
|
* between them).
|
|
*/
|
|
list_for_each_entry_reverse(dd, &ds->dependent_devices, list)
|
|
dock_hotplug_event(dd, ACPI_NOTIFY_EJECT_REQUEST, false);
|
|
|
|
list_for_each_entry_reverse(dd, &ds->dependent_devices, list)
|
|
acpi_bus_trim(dd->adev);
|
|
}
|
|
|
|
/**
|
|
* hotplug_dock_devices - Insert devices on a dock station.
|
|
* @ds: the dock station
|
|
* @event: either bus check or device check request
|
|
*
|
|
* Some devices on the dock station need to have drivers called
|
|
* to perform hotplug operations after a dock event has occurred.
|
|
* Traverse the list of dock devices that have registered a
|
|
* hotplug handler, and call the handler.
|
|
*/
|
|
static void hotplug_dock_devices(struct dock_station *ds, u32 event)
|
|
{
|
|
struct dock_dependent_device *dd;
|
|
|
|
/* Call driver specific post-dock fixups. */
|
|
list_for_each_entry(dd, &ds->dependent_devices, list)
|
|
dock_hotplug_event(dd, event, DOCK_CALL_FIXUP);
|
|
|
|
/* Call driver specific hotplug functions. */
|
|
list_for_each_entry(dd, &ds->dependent_devices, list)
|
|
dock_hotplug_event(dd, event, DOCK_CALL_HANDLER);
|
|
|
|
/*
|
|
* Check if all devices have been enumerated already. If not, run
|
|
* acpi_bus_scan() for them and that will cause scan handlers to be
|
|
* attached to device objects or acpi_drivers to be stopped/started if
|
|
* they are present.
|
|
*/
|
|
list_for_each_entry(dd, &ds->dependent_devices, list) {
|
|
struct acpi_device *adev = dd->adev;
|
|
|
|
if (!acpi_device_enumerated(adev)) {
|
|
int ret = acpi_bus_scan(adev->handle);
|
|
if (ret)
|
|
dev_dbg(&adev->dev, "scan error %d\n", -ret);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void dock_event(struct dock_station *ds, u32 event, int num)
|
|
{
|
|
struct device *dev = &ds->dock_device->dev;
|
|
char event_string[13];
|
|
char *envp[] = { event_string, NULL };
|
|
struct dock_dependent_device *dd;
|
|
|
|
if (num == UNDOCK_EVENT)
|
|
sprintf(event_string, "EVENT=undock");
|
|
else
|
|
sprintf(event_string, "EVENT=dock");
|
|
|
|
/*
|
|
* Indicate that the status of the dock station has
|
|
* changed.
|
|
*/
|
|
if (num == DOCK_EVENT)
|
|
kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
|
|
|
|
list_for_each_entry(dd, &ds->dependent_devices, list)
|
|
dock_hotplug_event(dd, event, DOCK_CALL_UEVENT);
|
|
|
|
if (num != DOCK_EVENT)
|
|
kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
|
|
}
|
|
|
|
/**
|
|
* handle_dock - handle a dock event
|
|
* @ds: the dock station
|
|
* @dock: to dock, or undock - that is the question
|
|
*
|
|
* Execute the _DCK method in response to an acpi event
|
|
*/
|
|
static void handle_dock(struct dock_station *ds, int dock)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_object_list arg_list;
|
|
union acpi_object arg;
|
|
unsigned long long value;
|
|
|
|
acpi_handle_info(ds->handle, "%s\n", dock ? "docking" : "undocking");
|
|
|
|
/* _DCK method has one argument */
|
|
arg_list.count = 1;
|
|
arg_list.pointer = &arg;
|
|
arg.type = ACPI_TYPE_INTEGER;
|
|
arg.integer.value = dock;
|
|
status = acpi_evaluate_integer(ds->handle, "_DCK", &arg_list, &value);
|
|
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
|
|
acpi_handle_err(ds->handle, "Failed to execute _DCK (0x%x)\n",
|
|
status);
|
|
}
|
|
|
|
static inline void dock(struct dock_station *ds)
|
|
{
|
|
handle_dock(ds, 1);
|
|
}
|
|
|
|
static inline void undock(struct dock_station *ds)
|
|
{
|
|
handle_dock(ds, 0);
|
|
}
|
|
|
|
static inline void begin_dock(struct dock_station *ds)
|
|
{
|
|
ds->flags |= DOCK_DOCKING;
|
|
}
|
|
|
|
static inline void complete_dock(struct dock_station *ds)
|
|
{
|
|
ds->flags &= ~(DOCK_DOCKING);
|
|
ds->last_dock_time = jiffies;
|
|
}
|
|
|
|
static inline void begin_undock(struct dock_station *ds)
|
|
{
|
|
ds->flags |= DOCK_UNDOCKING;
|
|
}
|
|
|
|
static inline void complete_undock(struct dock_station *ds)
|
|
{
|
|
ds->flags &= ~(DOCK_UNDOCKING);
|
|
}
|
|
|
|
/**
|
|
* dock_in_progress - see if we are in the middle of handling a dock event
|
|
* @ds: the dock station
|
|
*
|
|
* Sometimes while docking, false dock events can be sent to the driver
|
|
* because good connections aren't made or some other reason. Ignore these
|
|
* if we are in the middle of doing something.
|
|
*/
|
|
static int dock_in_progress(struct dock_station *ds)
|
|
{
|
|
if ((ds->flags & DOCK_DOCKING) ||
|
|
time_before(jiffies, (ds->last_dock_time + HZ)))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* handle_eject_request - handle an undock request checking for error conditions
|
|
*
|
|
* Check to make sure the dock device is still present, then undock and
|
|
* hotremove all the devices that may need removing.
|
|
*/
|
|
static int handle_eject_request(struct dock_station *ds, u32 event)
|
|
{
|
|
if (dock_in_progress(ds))
|
|
return -EBUSY;
|
|
|
|
/*
|
|
* here we need to generate the undock
|
|
* event prior to actually doing the undock
|
|
* so that the device struct still exists.
|
|
* Also, even send the dock event if the
|
|
* device is not present anymore
|
|
*/
|
|
dock_event(ds, event, UNDOCK_EVENT);
|
|
|
|
hot_remove_dock_devices(ds);
|
|
undock(ds);
|
|
acpi_evaluate_lck(ds->handle, 0);
|
|
acpi_evaluate_ej0(ds->handle);
|
|
if (dock_present(ds)) {
|
|
acpi_handle_err(ds->handle, "Unable to undock!\n");
|
|
return -EBUSY;
|
|
}
|
|
complete_undock(ds);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* dock_notify - Handle ACPI dock notification.
|
|
* @adev: Dock station's ACPI device object.
|
|
* @event: Event code.
|
|
*
|
|
* If we are notified to dock, then check to see if the dock is
|
|
* present and then dock. Notify all drivers of the dock event,
|
|
* and then hotplug and devices that may need hotplugging.
|
|
*/
|
|
int dock_notify(struct acpi_device *adev, u32 event)
|
|
{
|
|
acpi_handle handle = adev->handle;
|
|
struct dock_station *ds = find_dock_station(handle);
|
|
int surprise_removal = 0;
|
|
|
|
if (!ds)
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* According to acpi spec 3.0a, if a DEVICE_CHECK notification
|
|
* is sent and _DCK is present, it is assumed to mean an undock
|
|
* request.
|
|
*/
|
|
if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK)
|
|
event = ACPI_NOTIFY_EJECT_REQUEST;
|
|
|
|
/*
|
|
* dock station: BUS_CHECK - docked or surprise removal
|
|
* DEVICE_CHECK - undocked
|
|
* other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal
|
|
*
|
|
* To simplify event handling, dock dependent device handler always
|
|
* get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and
|
|
* ACPI_NOTIFY_EJECT_REQUEST for removal
|
|
*/
|
|
switch (event) {
|
|
case ACPI_NOTIFY_BUS_CHECK:
|
|
case ACPI_NOTIFY_DEVICE_CHECK:
|
|
if (!dock_in_progress(ds) && !acpi_device_enumerated(adev)) {
|
|
begin_dock(ds);
|
|
dock(ds);
|
|
if (!dock_present(ds)) {
|
|
acpi_handle_err(handle, "Unable to dock!\n");
|
|
complete_dock(ds);
|
|
break;
|
|
}
|
|
hotplug_dock_devices(ds, event);
|
|
complete_dock(ds);
|
|
dock_event(ds, event, DOCK_EVENT);
|
|
acpi_evaluate_lck(ds->handle, 1);
|
|
acpi_update_all_gpes();
|
|
break;
|
|
}
|
|
if (dock_present(ds) || dock_in_progress(ds))
|
|
break;
|
|
/* This is a surprise removal */
|
|
surprise_removal = 1;
|
|
event = ACPI_NOTIFY_EJECT_REQUEST;
|
|
/* Fall back */
|
|
/* fall through */
|
|
case ACPI_NOTIFY_EJECT_REQUEST:
|
|
begin_undock(ds);
|
|
if ((immediate_undock && !(ds->flags & DOCK_IS_ATA))
|
|
|| surprise_removal)
|
|
handle_eject_request(ds, event);
|
|
else
|
|
dock_event(ds, event, UNDOCK_EVENT);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* show_docked - read method for "docked" file in sysfs
|
|
*/
|
|
static ssize_t show_docked(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct dock_station *dock_station = dev->platform_data;
|
|
struct acpi_device *adev = NULL;
|
|
|
|
acpi_bus_get_device(dock_station->handle, &adev);
|
|
return snprintf(buf, PAGE_SIZE, "%u\n", acpi_device_enumerated(adev));
|
|
}
|
|
static DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL);
|
|
|
|
/*
|
|
* show_flags - read method for flags file in sysfs
|
|
*/
|
|
static ssize_t show_flags(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct dock_station *dock_station = dev->platform_data;
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags);
|
|
|
|
}
|
|
static DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL);
|
|
|
|
/*
|
|
* write_undock - write method for "undock" file in sysfs
|
|
*/
|
|
static ssize_t write_undock(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int ret;
|
|
struct dock_station *dock_station = dev->platform_data;
|
|
|
|
if (!count)
|
|
return -EINVAL;
|
|
|
|
acpi_scan_lock_acquire();
|
|
begin_undock(dock_station);
|
|
ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST);
|
|
acpi_scan_lock_release();
|
|
return ret ? ret: count;
|
|
}
|
|
static DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock);
|
|
|
|
/*
|
|
* show_dock_uid - read method for "uid" file in sysfs
|
|
*/
|
|
static ssize_t show_dock_uid(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
unsigned long long lbuf;
|
|
struct dock_station *dock_station = dev->platform_data;
|
|
acpi_status status = acpi_evaluate_integer(dock_station->handle,
|
|
"_UID", NULL, &lbuf);
|
|
if (ACPI_FAILURE(status))
|
|
return 0;
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%llx\n", lbuf);
|
|
}
|
|
static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL);
|
|
|
|
static ssize_t show_dock_type(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct dock_station *dock_station = dev->platform_data;
|
|
char *type;
|
|
|
|
if (dock_station->flags & DOCK_IS_DOCK)
|
|
type = "dock_station";
|
|
else if (dock_station->flags & DOCK_IS_ATA)
|
|
type = "ata_bay";
|
|
else if (dock_station->flags & DOCK_IS_BAT)
|
|
type = "battery_bay";
|
|
else
|
|
type = "unknown";
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s\n", type);
|
|
}
|
|
static DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL);
|
|
|
|
static struct attribute *dock_attributes[] = {
|
|
&dev_attr_docked.attr,
|
|
&dev_attr_flags.attr,
|
|
&dev_attr_undock.attr,
|
|
&dev_attr_uid.attr,
|
|
&dev_attr_type.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group dock_attribute_group = {
|
|
.attrs = dock_attributes
|
|
};
|
|
|
|
/**
|
|
* acpi_dock_add - Add a new dock station
|
|
* @adev: Dock station ACPI device object.
|
|
*
|
|
* allocated and initialize a new dock station device.
|
|
*/
|
|
void acpi_dock_add(struct acpi_device *adev)
|
|
{
|
|
struct dock_station *dock_station, ds = { NULL, };
|
|
struct platform_device_info pdevinfo;
|
|
acpi_handle handle = adev->handle;
|
|
struct platform_device *dd;
|
|
int ret;
|
|
|
|
memset(&pdevinfo, 0, sizeof(pdevinfo));
|
|
pdevinfo.name = "dock";
|
|
pdevinfo.id = dock_station_count;
|
|
pdevinfo.fwnode = acpi_fwnode_handle(adev);
|
|
pdevinfo.data = &ds;
|
|
pdevinfo.size_data = sizeof(ds);
|
|
dd = platform_device_register_full(&pdevinfo);
|
|
if (IS_ERR(dd))
|
|
return;
|
|
|
|
dock_station = dd->dev.platform_data;
|
|
|
|
dock_station->handle = handle;
|
|
dock_station->dock_device = dd;
|
|
dock_station->last_dock_time = jiffies - HZ;
|
|
|
|
INIT_LIST_HEAD(&dock_station->sibling);
|
|
INIT_LIST_HEAD(&dock_station->dependent_devices);
|
|
|
|
/* we want the dock device to send uevents */
|
|
dev_set_uevent_suppress(&dd->dev, 0);
|
|
|
|
if (acpi_dock_match(handle))
|
|
dock_station->flags |= DOCK_IS_DOCK;
|
|
if (acpi_ata_match(handle))
|
|
dock_station->flags |= DOCK_IS_ATA;
|
|
if (acpi_device_is_battery(adev))
|
|
dock_station->flags |= DOCK_IS_BAT;
|
|
|
|
ret = sysfs_create_group(&dd->dev.kobj, &dock_attribute_group);
|
|
if (ret)
|
|
goto err_unregister;
|
|
|
|
/* add the dock station as a device dependent on itself */
|
|
ret = add_dock_dependent_device(dock_station, adev);
|
|
if (ret)
|
|
goto err_rmgroup;
|
|
|
|
dock_station_count++;
|
|
list_add(&dock_station->sibling, &dock_stations);
|
|
adev->flags.is_dock_station = true;
|
|
dev_info(&adev->dev, "ACPI dock station (docks/bays count: %d)\n",
|
|
dock_station_count);
|
|
return;
|
|
|
|
err_rmgroup:
|
|
sysfs_remove_group(&dd->dev.kobj, &dock_attribute_group);
|
|
|
|
err_unregister:
|
|
platform_device_unregister(dd);
|
|
acpi_handle_err(handle, "%s encountered error %d\n", __func__, ret);
|
|
}
|