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HID: add suspend/resume helpers 

There is a lot of duplication of code in the HID low level drivers.
Better have everything in one place so we can eventually extend it
in a generic way.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20211202095334.14399-4-benjamin.tissoires@redhat.com
This commit is contained in:
Benjamin Tissoires 2021-12-02 10:53:33 +01:00
parent 740bebf421
commit 9e35620809
5 changed files with 56 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/hid/hid-core.c
View File

@ -2126,6 +2126,35 @@ void hid_hw_close(struct hid_device *hdev)
}
EXPORT_SYMBOL_GPL(hid_hw_close);
#ifdef CONFIG_PM
int hid_driver_suspend(struct hid_device *hdev, pm_message_t state)
{
if (hdev->driver && hdev->driver->suspend)
return hdev->driver->suspend(hdev, state);
return 0;
}
EXPORT_SYMBOL_GPL(hid_driver_suspend);
int hid_driver_reset_resume(struct hid_device *hdev)
{
if (hdev->driver && hdev->driver->reset_resume)
return hdev->driver->reset_resume(hdev);
return 0;
}
EXPORT_SYMBOL_GPL(hid_driver_reset_resume);
int hid_driver_resume(struct hid_device *hdev)
{
if (hdev->driver && hdev->driver->resume)
return hdev->driver->resume(hdev);
return 0;
}
EXPORT_SYMBOL_GPL(hid_driver_resume);
#endif /* CONFIG_PM */
struct hid_dynid {
struct list_head list;
struct hid_device_id id;

15
drivers/hid/i2c-hid/i2c-hid-core.c
View File

@ -1063,11 +1063,9 @@ static int i2c_hid_core_suspend(struct device *dev)
int ret;
int wake_status;
if (hid->driver && hid->driver->suspend) {
ret = hid->driver->suspend(hid, PMSG_SUSPEND);
if (ret < 0)
return ret;
}
ret = hid_driver_suspend(hid, PMSG_SUSPEND);
if (ret < 0)
return ret;
/* Save some power */
i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
@ -1125,12 +1123,7 @@ static int i2c_hid_core_resume(struct device *dev)
if (ret)
return ret;
if (hid->driver && hid->driver->reset_resume) {
ret = hid->driver->reset_resume(hid);
return ret;
}
return 0;
return hid_driver_reset_resume(hid);
}
#endif

25
drivers/hid/surface-hid/surface_hid_core.c
View File

@ -204,50 +204,35 @@ static int surface_hid_suspend(struct device *dev)
{
struct surface_hid_device *d = dev_get_drvdata(dev);
if (d->hid->driver && d->hid->driver->suspend)
return d->hid->driver->suspend(d->hid, PMSG_SUSPEND);
return 0;
return hid_driver_suspend(d->hid, PMSG_SUSPEND);
}
static int surface_hid_resume(struct device *dev)
{
struct surface_hid_device *d = dev_get_drvdata(dev);
if (d->hid->driver && d->hid->driver->resume)
return d->hid->driver->resume(d->hid);
return 0;
return hid_driver_resume(d->hid);
}
static int surface_hid_freeze(struct device *dev)
{
struct surface_hid_device *d = dev_get_drvdata(dev);
if (d->hid->driver && d->hid->driver->suspend)
return d->hid->driver->suspend(d->hid, PMSG_FREEZE);
return 0;
return hid_driver_suspend(d->hid, PMSG_FREEZE);
}
static int surface_hid_poweroff(struct device *dev)
{
struct surface_hid_device *d = dev_get_drvdata(dev);
if (d->hid->driver && d->hid->driver->suspend)
return d->hid->driver->suspend(d->hid, PMSG_HIBERNATE);
return 0;
return hid_driver_suspend(d->hid, PMSG_HIBERNATE);
}
static int surface_hid_restore(struct device *dev)
{
struct surface_hid_device *d = dev_get_drvdata(dev);
if (d->hid->driver && d->hid->driver->reset_resume)
return d->hid->driver->reset_resume(d->hid);
return 0;
return hid_driver_reset_resume(d->hid);
}
const struct dev_pm_ops surface_hid_pm_ops = {

19
drivers/hid/usbhid/hid-core.c
View File

@ -1563,8 +1563,8 @@ static int hid_resume_common(struct hid_device *hid, bool driver_suspended)
int status = 0;
hid_restart_io(hid);
if (driver_suspended && hid->driver && hid->driver->resume)
status = hid->driver->resume(hid);
if (driver_suspended)
status = hid_driver_resume(hid);
return status;
}
@ -1588,11 +1588,9 @@ static int hid_suspend(struct usb_interface *intf, pm_message_t message)
{
set_bit(HID_SUSPENDED, &usbhid->iofl);
spin_unlock_irq(&usbhid->lock);
if (hid->driver && hid->driver->suspend) {
status = hid->driver->suspend(hid, message);
if (status < 0)
goto failed;
}
status = hid_driver_suspend(hid, message);
if (status < 0)
goto failed;
driver_suspended = true;
} else {
usbhid_mark_busy(usbhid);
@ -1602,8 +1600,7 @@ static int hid_suspend(struct usb_interface *intf, pm_message_t message)
} else {
/* TODO: resume() might need to handle suspend failure */
if (hid->driver && hid->driver->suspend)
status = hid->driver->suspend(hid, message);
status = hid_driver_suspend(hid, message);
driver_suspended = true;
spin_lock_irq(&usbhid->lock);
set_bit(HID_SUSPENDED, &usbhid->iofl);
@ -1644,8 +1641,8 @@ static int hid_reset_resume(struct usb_interface *intf)
int status;
status = hid_post_reset(intf);
if (status >= 0 && hid->driver && hid->driver->reset_resume) {
int ret = hid->driver->reset_resume(hid);
if (status >= 0) {
int ret = hid_driver_reset_resume(hid);
if (ret < 0)
status = ret;
}

10
include/linux/hid.h
View File

@ -923,6 +923,16 @@ s32 hid_snto32(__u32 value, unsigned n);
__u32 hid_field_extract(const struct hid_device *hid, __u8 *report,
unsigned offset, unsigned n);
#ifdef CONFIG_PM
int hid_driver_suspend(struct hid_device *hdev, pm_message_t state);
int hid_driver_reset_resume(struct hid_device *hdev);
int hid_driver_resume(struct hid_device *hdev);
#else
static inline int hid_driver_suspend(struct hid_device *hdev, pm_message_t state) { return 0; }
static inline int hid_driver_reset_resume(struct hid_device *hdev) { return 0; }
static inline int hid_driver_resume(struct hid_device *hdev) { return 0; }
#endif
/**
* hid_device_io_start - enable HID input during probe, remove
*