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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Joe Perches](/assets/img/avatar_default.png)
Change additional instances that could use sysfs_emit and sysfs_emit_at that the coccinelle script could not convert. o macros creating show functions with ## concatenation o unbound sprintf uses with buf+len for start of output to sysfs_emit_at o returns with ?: tests and sprintf to sysfs_emit o sysfs output with struct class * not struct device * arguments Miscellanea: o remove unnecessary initializations around these changes o consistently use int len for return length of show functions o use octal permissions and not S_<FOO> o rename a few show function names so DEVICE_ATTR_<FOO> can be used o use DEVICE_ATTR_ADMIN_RO where appropriate o consistently use const char *output for strings o checkpatch/style neatening Signed-off-by: Joe Perches <joe@perches.com> Link: https://lore.kernel.org/r/8bc24444fe2049a9b2de6127389b57edfdfe324d.1600285923.git.joe@perches.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
838 lines
21 KiB
C
838 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* sysfs entries for device PM */
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#include <linux/device.h>
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#include <linux/kobject.h>
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#include <linux/string.h>
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#include <linux/export.h>
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#include <linux/pm_qos.h>
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#include <linux/pm_runtime.h>
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#include <linux/pm_wakeup.h>
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#include <linux/atomic.h>
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#include <linux/jiffies.h>
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#include "power.h"
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/*
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* control - Report/change current runtime PM setting of the device
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*
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* Runtime power management of a device can be blocked with the help of
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* this attribute. All devices have one of the following two values for
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* the power/control file:
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*
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* + "auto\n" to allow the device to be power managed at run time;
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* + "on\n" to prevent the device from being power managed at run time;
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*
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* The default for all devices is "auto", which means that devices may be
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* subject to automatic power management, depending on their drivers.
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* Changing this attribute to "on" prevents the driver from power managing
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* the device at run time. Doing that while the device is suspended causes
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* it to be woken up.
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*
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* wakeup - Report/change current wakeup option for device
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*
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* Some devices support "wakeup" events, which are hardware signals
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* used to activate devices from suspended or low power states. Such
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* devices have one of three values for the sysfs power/wakeup file:
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*
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* + "enabled\n" to issue the events;
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* + "disabled\n" not to do so; or
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* + "\n" for temporary or permanent inability to issue wakeup.
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*
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* (For example, unconfigured USB devices can't issue wakeups.)
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*
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* Familiar examples of devices that can issue wakeup events include
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* keyboards and mice (both PS2 and USB styles), power buttons, modems,
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* "Wake-On-LAN" Ethernet links, GPIO lines, and more. Some events
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* will wake the entire system from a suspend state; others may just
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* wake up the device (if the system as a whole is already active).
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* Some wakeup events use normal IRQ lines; other use special out
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* of band signaling.
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*
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* It is the responsibility of device drivers to enable (or disable)
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* wakeup signaling as part of changing device power states, respecting
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* the policy choices provided through the driver model.
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*
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* Devices may not be able to generate wakeup events from all power
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* states. Also, the events may be ignored in some configurations;
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* for example, they might need help from other devices that aren't
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* active, or which may have wakeup disabled. Some drivers rely on
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* wakeup events internally (unless they are disabled), keeping
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* their hardware in low power modes whenever they're unused. This
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* saves runtime power, without requiring system-wide sleep states.
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*
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* async - Report/change current async suspend setting for the device
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*
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* Asynchronous suspend and resume of the device during system-wide power
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* state transitions can be enabled by writing "enabled" to this file.
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* Analogously, if "disabled" is written to this file, the device will be
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* suspended and resumed synchronously.
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*
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* All devices have one of the following two values for power/async:
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*
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* + "enabled\n" to permit the asynchronous suspend/resume of the device;
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* + "disabled\n" to forbid it;
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*
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* NOTE: It generally is unsafe to permit the asynchronous suspend/resume
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* of a device unless it is certain that all of the PM dependencies of the
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* device are known to the PM core. However, for some devices this
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* attribute is set to "enabled" by bus type code or device drivers and in
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* that cases it should be safe to leave the default value.
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*
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* autosuspend_delay_ms - Report/change a device's autosuspend_delay value
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*
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* Some drivers don't want to carry out a runtime suspend as soon as a
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* device becomes idle; they want it always to remain idle for some period
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* of time before suspending it. This period is the autosuspend_delay
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* value (expressed in milliseconds) and it can be controlled by the user.
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* If the value is negative then the device will never be runtime
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* suspended.
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*
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* NOTE: The autosuspend_delay_ms attribute and the autosuspend_delay
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* value are used only if the driver calls pm_runtime_use_autosuspend().
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*
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* wakeup_count - Report the number of wakeup events related to the device
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*/
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const char power_group_name[] = "power";
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EXPORT_SYMBOL_GPL(power_group_name);
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static const char ctrl_auto[] = "auto";
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static const char ctrl_on[] = "on";
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static ssize_t control_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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return sysfs_emit(buf, "%s\n",
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dev->power.runtime_auto ? ctrl_auto : ctrl_on);
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}
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static ssize_t control_store(struct device * dev, struct device_attribute *attr,
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const char * buf, size_t n)
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{
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device_lock(dev);
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if (sysfs_streq(buf, ctrl_auto))
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pm_runtime_allow(dev);
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else if (sysfs_streq(buf, ctrl_on))
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pm_runtime_forbid(dev);
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else
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n = -EINVAL;
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device_unlock(dev);
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return n;
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}
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static DEVICE_ATTR_RW(control);
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static ssize_t runtime_active_time_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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u64 tmp = pm_runtime_active_time(dev);
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do_div(tmp, NSEC_PER_MSEC);
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return sysfs_emit(buf, "%llu\n", tmp);
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}
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static DEVICE_ATTR_RO(runtime_active_time);
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static ssize_t runtime_suspended_time_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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u64 tmp = pm_runtime_suspended_time(dev);
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do_div(tmp, NSEC_PER_MSEC);
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return sysfs_emit(buf, "%llu\n", tmp);
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}
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static DEVICE_ATTR_RO(runtime_suspended_time);
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static ssize_t runtime_status_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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const char *output;
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if (dev->power.runtime_error) {
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output = "error";
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} else if (dev->power.disable_depth) {
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output = "unsupported";
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} else {
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switch (dev->power.runtime_status) {
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case RPM_SUSPENDED:
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output = "suspended";
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break;
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case RPM_SUSPENDING:
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output = "suspending";
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break;
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case RPM_RESUMING:
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output = "resuming";
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break;
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case RPM_ACTIVE:
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output = "active";
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break;
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default:
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return -EIO;
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}
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}
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return sysfs_emit(buf, "%s\n", output);
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}
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static DEVICE_ATTR_RO(runtime_status);
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static ssize_t autosuspend_delay_ms_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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if (!dev->power.use_autosuspend)
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return -EIO;
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return sysfs_emit(buf, "%d\n", dev->power.autosuspend_delay);
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}
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static ssize_t autosuspend_delay_ms_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t n)
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{
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long delay;
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if (!dev->power.use_autosuspend)
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return -EIO;
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if (kstrtol(buf, 10, &delay) != 0 || delay != (int) delay)
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return -EINVAL;
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device_lock(dev);
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pm_runtime_set_autosuspend_delay(dev, delay);
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device_unlock(dev);
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return n;
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}
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static DEVICE_ATTR_RW(autosuspend_delay_ms);
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static ssize_t pm_qos_resume_latency_us_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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s32 value = dev_pm_qos_requested_resume_latency(dev);
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if (value == 0)
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return sysfs_emit(buf, "n/a\n");
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if (value == PM_QOS_RESUME_LATENCY_NO_CONSTRAINT)
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value = 0;
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return sysfs_emit(buf, "%d\n", value);
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}
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static ssize_t pm_qos_resume_latency_us_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t n)
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{
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s32 value;
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int ret;
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if (!kstrtos32(buf, 0, &value)) {
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/*
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* Prevent users from writing negative or "no constraint" values
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* directly.
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*/
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if (value < 0 || value == PM_QOS_RESUME_LATENCY_NO_CONSTRAINT)
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return -EINVAL;
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if (value == 0)
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value = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
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} else if (sysfs_streq(buf, "n/a")) {
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value = 0;
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} else {
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return -EINVAL;
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}
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ret = dev_pm_qos_update_request(dev->power.qos->resume_latency_req,
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value);
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return ret < 0 ? ret : n;
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}
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static DEVICE_ATTR_RW(pm_qos_resume_latency_us);
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static ssize_t pm_qos_latency_tolerance_us_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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s32 value = dev_pm_qos_get_user_latency_tolerance(dev);
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if (value < 0)
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return sysfs_emit(buf, "%s\n", "auto");
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if (value == PM_QOS_LATENCY_ANY)
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return sysfs_emit(buf, "%s\n", "any");
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return sysfs_emit(buf, "%d\n", value);
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}
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static ssize_t pm_qos_latency_tolerance_us_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t n)
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{
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s32 value;
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int ret;
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if (kstrtos32(buf, 0, &value) == 0) {
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/* Users can't write negative values directly */
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if (value < 0)
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return -EINVAL;
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} else {
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if (sysfs_streq(buf, "auto"))
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value = PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT;
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else if (sysfs_streq(buf, "any"))
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value = PM_QOS_LATENCY_ANY;
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else
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return -EINVAL;
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}
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ret = dev_pm_qos_update_user_latency_tolerance(dev, value);
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return ret < 0 ? ret : n;
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}
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static DEVICE_ATTR_RW(pm_qos_latency_tolerance_us);
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static ssize_t pm_qos_no_power_off_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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return sysfs_emit(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev)
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& PM_QOS_FLAG_NO_POWER_OFF));
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}
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static ssize_t pm_qos_no_power_off_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t n)
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{
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int ret;
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if (kstrtoint(buf, 0, &ret))
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return -EINVAL;
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if (ret != 0 && ret != 1)
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return -EINVAL;
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ret = dev_pm_qos_update_flags(dev, PM_QOS_FLAG_NO_POWER_OFF, ret);
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return ret < 0 ? ret : n;
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}
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static DEVICE_ATTR_RW(pm_qos_no_power_off);
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#ifdef CONFIG_PM_SLEEP
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static const char _enabled[] = "enabled";
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static const char _disabled[] = "disabled";
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static ssize_t wakeup_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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return sysfs_emit(buf, "%s\n", device_can_wakeup(dev)
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? (device_may_wakeup(dev) ? _enabled : _disabled)
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: "");
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}
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static ssize_t wakeup_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t n)
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{
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if (!device_can_wakeup(dev))
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return -EINVAL;
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if (sysfs_streq(buf, _enabled))
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device_set_wakeup_enable(dev, 1);
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else if (sysfs_streq(buf, _disabled))
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device_set_wakeup_enable(dev, 0);
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else
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return -EINVAL;
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return n;
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}
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static DEVICE_ATTR_RW(wakeup);
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static ssize_t wakeup_count_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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unsigned long count;
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bool enabled = false;
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spin_lock_irq(&dev->power.lock);
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if (dev->power.wakeup) {
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count = dev->power.wakeup->wakeup_count;
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enabled = true;
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}
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spin_unlock_irq(&dev->power.lock);
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if (!enabled)
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return sysfs_emit(buf, "\n");
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return sysfs_emit(buf, "%lu\n", count);
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}
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static DEVICE_ATTR_RO(wakeup_count);
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static ssize_t wakeup_active_count_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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unsigned long count;
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bool enabled = false;
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spin_lock_irq(&dev->power.lock);
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if (dev->power.wakeup) {
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count = dev->power.wakeup->active_count;
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enabled = true;
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}
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spin_unlock_irq(&dev->power.lock);
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if (!enabled)
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return sysfs_emit(buf, "\n");
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return sysfs_emit(buf, "%lu\n", count);
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}
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static DEVICE_ATTR_RO(wakeup_active_count);
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static ssize_t wakeup_abort_count_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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unsigned long count;
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bool enabled = false;
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spin_lock_irq(&dev->power.lock);
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if (dev->power.wakeup) {
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count = dev->power.wakeup->wakeup_count;
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enabled = true;
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}
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spin_unlock_irq(&dev->power.lock);
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if (!enabled)
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return sysfs_emit(buf, "\n");
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return sysfs_emit(buf, "%lu\n", count);
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}
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static DEVICE_ATTR_RO(wakeup_abort_count);
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static ssize_t wakeup_expire_count_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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unsigned long count;
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bool enabled = false;
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spin_lock_irq(&dev->power.lock);
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if (dev->power.wakeup) {
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count = dev->power.wakeup->expire_count;
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enabled = true;
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}
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spin_unlock_irq(&dev->power.lock);
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if (!enabled)
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return sysfs_emit(buf, "\n");
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return sysfs_emit(buf, "%lu\n", count);
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}
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static DEVICE_ATTR_RO(wakeup_expire_count);
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static ssize_t wakeup_active_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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unsigned int active;
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bool enabled = false;
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spin_lock_irq(&dev->power.lock);
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if (dev->power.wakeup) {
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active = dev->power.wakeup->active;
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enabled = true;
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}
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spin_unlock_irq(&dev->power.lock);
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if (!enabled)
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return sysfs_emit(buf, "\n");
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return sysfs_emit(buf, "%u\n", active);
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}
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static DEVICE_ATTR_RO(wakeup_active);
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static ssize_t wakeup_total_time_ms_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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s64 msec;
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bool enabled = false;
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spin_lock_irq(&dev->power.lock);
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if (dev->power.wakeup) {
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msec = ktime_to_ms(dev->power.wakeup->total_time);
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enabled = true;
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}
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spin_unlock_irq(&dev->power.lock);
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if (!enabled)
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return sysfs_emit(buf, "\n");
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return sysfs_emit(buf, "%lld\n", msec);
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}
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static DEVICE_ATTR_RO(wakeup_total_time_ms);
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static ssize_t wakeup_max_time_ms_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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s64 msec;
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bool enabled = false;
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spin_lock_irq(&dev->power.lock);
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if (dev->power.wakeup) {
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msec = ktime_to_ms(dev->power.wakeup->max_time);
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enabled = true;
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}
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spin_unlock_irq(&dev->power.lock);
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if (!enabled)
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return sysfs_emit(buf, "\n");
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return sysfs_emit(buf, "%lld\n", msec);
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}
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static DEVICE_ATTR_RO(wakeup_max_time_ms);
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static ssize_t wakeup_last_time_ms_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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s64 msec;
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bool enabled = false;
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|
|
spin_lock_irq(&dev->power.lock);
|
|
if (dev->power.wakeup) {
|
|
msec = ktime_to_ms(dev->power.wakeup->last_time);
|
|
enabled = true;
|
|
}
|
|
spin_unlock_irq(&dev->power.lock);
|
|
|
|
if (!enabled)
|
|
return sysfs_emit(buf, "\n");
|
|
return sysfs_emit(buf, "%lld\n", msec);
|
|
}
|
|
|
|
static inline int dpm_sysfs_wakeup_change_owner(struct device *dev, kuid_t kuid,
|
|
kgid_t kgid)
|
|
{
|
|
if (dev->power.wakeup && dev->power.wakeup->dev)
|
|
return device_change_owner(dev->power.wakeup->dev, kuid, kgid);
|
|
return 0;
|
|
}
|
|
|
|
static DEVICE_ATTR_RO(wakeup_last_time_ms);
|
|
|
|
#ifdef CONFIG_PM_AUTOSLEEP
|
|
static ssize_t wakeup_prevent_sleep_time_ms_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
s64 msec;
|
|
bool enabled = false;
|
|
|
|
spin_lock_irq(&dev->power.lock);
|
|
if (dev->power.wakeup) {
|
|
msec = ktime_to_ms(dev->power.wakeup->prevent_sleep_time);
|
|
enabled = true;
|
|
}
|
|
spin_unlock_irq(&dev->power.lock);
|
|
|
|
if (!enabled)
|
|
return sysfs_emit(buf, "\n");
|
|
return sysfs_emit(buf, "%lld\n", msec);
|
|
}
|
|
|
|
static DEVICE_ATTR_RO(wakeup_prevent_sleep_time_ms);
|
|
#endif /* CONFIG_PM_AUTOSLEEP */
|
|
#else /* CONFIG_PM_SLEEP */
|
|
static inline int dpm_sysfs_wakeup_change_owner(struct device *dev, kuid_t kuid,
|
|
kgid_t kgid)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_ADVANCED_DEBUG
|
|
static ssize_t runtime_usage_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return sysfs_emit(buf, "%d\n", atomic_read(&dev->power.usage_count));
|
|
}
|
|
static DEVICE_ATTR_RO(runtime_usage);
|
|
|
|
static ssize_t runtime_active_kids_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sysfs_emit(buf, "%d\n", dev->power.ignore_children ?
|
|
0 : atomic_read(&dev->power.child_count));
|
|
}
|
|
static DEVICE_ATTR_RO(runtime_active_kids);
|
|
|
|
static ssize_t runtime_enabled_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
const char *output;
|
|
|
|
if (dev->power.disable_depth && !dev->power.runtime_auto)
|
|
output = "disabled & forbidden";
|
|
else if (dev->power.disable_depth)
|
|
output = "disabled";
|
|
else if (!dev->power.runtime_auto)
|
|
output = "forbidden";
|
|
else
|
|
output = "enabled";
|
|
|
|
return sysfs_emit(buf, "%s\n", output);
|
|
}
|
|
static DEVICE_ATTR_RO(runtime_enabled);
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static ssize_t async_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sysfs_emit(buf, "%s\n",
|
|
device_async_suspend_enabled(dev) ?
|
|
_enabled : _disabled);
|
|
}
|
|
|
|
static ssize_t async_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t n)
|
|
{
|
|
if (sysfs_streq(buf, _enabled))
|
|
device_enable_async_suspend(dev);
|
|
else if (sysfs_streq(buf, _disabled))
|
|
device_disable_async_suspend(dev);
|
|
else
|
|
return -EINVAL;
|
|
return n;
|
|
}
|
|
|
|
static DEVICE_ATTR_RW(async);
|
|
|
|
#endif /* CONFIG_PM_SLEEP */
|
|
#endif /* CONFIG_PM_ADVANCED_DEBUG */
|
|
|
|
static struct attribute *power_attrs[] = {
|
|
#ifdef CONFIG_PM_ADVANCED_DEBUG
|
|
#ifdef CONFIG_PM_SLEEP
|
|
&dev_attr_async.attr,
|
|
#endif
|
|
&dev_attr_runtime_status.attr,
|
|
&dev_attr_runtime_usage.attr,
|
|
&dev_attr_runtime_active_kids.attr,
|
|
&dev_attr_runtime_enabled.attr,
|
|
#endif /* CONFIG_PM_ADVANCED_DEBUG */
|
|
NULL,
|
|
};
|
|
static const struct attribute_group pm_attr_group = {
|
|
.name = power_group_name,
|
|
.attrs = power_attrs,
|
|
};
|
|
|
|
static struct attribute *wakeup_attrs[] = {
|
|
#ifdef CONFIG_PM_SLEEP
|
|
&dev_attr_wakeup.attr,
|
|
&dev_attr_wakeup_count.attr,
|
|
&dev_attr_wakeup_active_count.attr,
|
|
&dev_attr_wakeup_abort_count.attr,
|
|
&dev_attr_wakeup_expire_count.attr,
|
|
&dev_attr_wakeup_active.attr,
|
|
&dev_attr_wakeup_total_time_ms.attr,
|
|
&dev_attr_wakeup_max_time_ms.attr,
|
|
&dev_attr_wakeup_last_time_ms.attr,
|
|
#ifdef CONFIG_PM_AUTOSLEEP
|
|
&dev_attr_wakeup_prevent_sleep_time_ms.attr,
|
|
#endif
|
|
#endif
|
|
NULL,
|
|
};
|
|
static const struct attribute_group pm_wakeup_attr_group = {
|
|
.name = power_group_name,
|
|
.attrs = wakeup_attrs,
|
|
};
|
|
|
|
static struct attribute *runtime_attrs[] = {
|
|
#ifndef CONFIG_PM_ADVANCED_DEBUG
|
|
&dev_attr_runtime_status.attr,
|
|
#endif
|
|
&dev_attr_control.attr,
|
|
&dev_attr_runtime_suspended_time.attr,
|
|
&dev_attr_runtime_active_time.attr,
|
|
&dev_attr_autosuspend_delay_ms.attr,
|
|
NULL,
|
|
};
|
|
static const struct attribute_group pm_runtime_attr_group = {
|
|
.name = power_group_name,
|
|
.attrs = runtime_attrs,
|
|
};
|
|
|
|
static struct attribute *pm_qos_resume_latency_attrs[] = {
|
|
&dev_attr_pm_qos_resume_latency_us.attr,
|
|
NULL,
|
|
};
|
|
static const struct attribute_group pm_qos_resume_latency_attr_group = {
|
|
.name = power_group_name,
|
|
.attrs = pm_qos_resume_latency_attrs,
|
|
};
|
|
|
|
static struct attribute *pm_qos_latency_tolerance_attrs[] = {
|
|
&dev_attr_pm_qos_latency_tolerance_us.attr,
|
|
NULL,
|
|
};
|
|
static const struct attribute_group pm_qos_latency_tolerance_attr_group = {
|
|
.name = power_group_name,
|
|
.attrs = pm_qos_latency_tolerance_attrs,
|
|
};
|
|
|
|
static struct attribute *pm_qos_flags_attrs[] = {
|
|
&dev_attr_pm_qos_no_power_off.attr,
|
|
NULL,
|
|
};
|
|
static const struct attribute_group pm_qos_flags_attr_group = {
|
|
.name = power_group_name,
|
|
.attrs = pm_qos_flags_attrs,
|
|
};
|
|
|
|
int dpm_sysfs_add(struct device *dev)
|
|
{
|
|
int rc;
|
|
|
|
/* No need to create PM sysfs if explicitly disabled. */
|
|
if (device_pm_not_required(dev))
|
|
return 0;
|
|
|
|
rc = sysfs_create_group(&dev->kobj, &pm_attr_group);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (!pm_runtime_has_no_callbacks(dev)) {
|
|
rc = sysfs_merge_group(&dev->kobj, &pm_runtime_attr_group);
|
|
if (rc)
|
|
goto err_out;
|
|
}
|
|
if (device_can_wakeup(dev)) {
|
|
rc = sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group);
|
|
if (rc)
|
|
goto err_runtime;
|
|
}
|
|
if (dev->power.set_latency_tolerance) {
|
|
rc = sysfs_merge_group(&dev->kobj,
|
|
&pm_qos_latency_tolerance_attr_group);
|
|
if (rc)
|
|
goto err_wakeup;
|
|
}
|
|
rc = pm_wakeup_source_sysfs_add(dev);
|
|
if (rc)
|
|
goto err_latency;
|
|
return 0;
|
|
|
|
err_latency:
|
|
sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_tolerance_attr_group);
|
|
err_wakeup:
|
|
sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group);
|
|
err_runtime:
|
|
sysfs_unmerge_group(&dev->kobj, &pm_runtime_attr_group);
|
|
err_out:
|
|
sysfs_remove_group(&dev->kobj, &pm_attr_group);
|
|
return rc;
|
|
}
|
|
|
|
int dpm_sysfs_change_owner(struct device *dev, kuid_t kuid, kgid_t kgid)
|
|
{
|
|
int rc;
|
|
|
|
if (device_pm_not_required(dev))
|
|
return 0;
|
|
|
|
rc = sysfs_group_change_owner(&dev->kobj, &pm_attr_group, kuid, kgid);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (!pm_runtime_has_no_callbacks(dev)) {
|
|
rc = sysfs_group_change_owner(
|
|
&dev->kobj, &pm_runtime_attr_group, kuid, kgid);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
if (device_can_wakeup(dev)) {
|
|
rc = sysfs_group_change_owner(&dev->kobj, &pm_wakeup_attr_group,
|
|
kuid, kgid);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = dpm_sysfs_wakeup_change_owner(dev, kuid, kgid);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
if (dev->power.set_latency_tolerance) {
|
|
rc = sysfs_group_change_owner(
|
|
&dev->kobj, &pm_qos_latency_tolerance_attr_group, kuid,
|
|
kgid);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int wakeup_sysfs_add(struct device *dev)
|
|
{
|
|
int ret = sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group);
|
|
|
|
if (!ret)
|
|
kobject_uevent(&dev->kobj, KOBJ_CHANGE);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void wakeup_sysfs_remove(struct device *dev)
|
|
{
|
|
sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group);
|
|
kobject_uevent(&dev->kobj, KOBJ_CHANGE);
|
|
}
|
|
|
|
int pm_qos_sysfs_add_resume_latency(struct device *dev)
|
|
{
|
|
return sysfs_merge_group(&dev->kobj, &pm_qos_resume_latency_attr_group);
|
|
}
|
|
|
|
void pm_qos_sysfs_remove_resume_latency(struct device *dev)
|
|
{
|
|
sysfs_unmerge_group(&dev->kobj, &pm_qos_resume_latency_attr_group);
|
|
}
|
|
|
|
int pm_qos_sysfs_add_flags(struct device *dev)
|
|
{
|
|
return sysfs_merge_group(&dev->kobj, &pm_qos_flags_attr_group);
|
|
}
|
|
|
|
void pm_qos_sysfs_remove_flags(struct device *dev)
|
|
{
|
|
sysfs_unmerge_group(&dev->kobj, &pm_qos_flags_attr_group);
|
|
}
|
|
|
|
int pm_qos_sysfs_add_latency_tolerance(struct device *dev)
|
|
{
|
|
return sysfs_merge_group(&dev->kobj,
|
|
&pm_qos_latency_tolerance_attr_group);
|
|
}
|
|
|
|
void pm_qos_sysfs_remove_latency_tolerance(struct device *dev)
|
|
{
|
|
sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_tolerance_attr_group);
|
|
}
|
|
|
|
void rpm_sysfs_remove(struct device *dev)
|
|
{
|
|
sysfs_unmerge_group(&dev->kobj, &pm_runtime_attr_group);
|
|
}
|
|
|
|
void dpm_sysfs_remove(struct device *dev)
|
|
{
|
|
if (device_pm_not_required(dev))
|
|
return;
|
|
sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_tolerance_attr_group);
|
|
dev_pm_qos_constraints_destroy(dev);
|
|
rpm_sysfs_remove(dev);
|
|
sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group);
|
|
sysfs_remove_group(&dev->kobj, &pm_attr_group);
|
|
}
|