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[media] em28xx-input: implement em28xx_ops: suspend/resume hooks

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Implement em28xx_ops: suspend/resume hooks. em28xx usb driver will
invoke em28xx_ops: suspend and resume hooks for all its extensions
from its suspend() and resume() interfaces.

[m.chehab@samsung.com: Fix a breakage caused by calling a non-existing
 function call: schedule_delayed_work_sync(), and test if IR was defined
 at suspend/resume]

Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Shuah Khan 2014-02-21 21:50:16 -03:00 • committed by Mauro Carvalho Chehab
commit 5025076aad
1 changed files with 37 additions and 0 deletions
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37
drivers/media/usb/em28xx/em28xx-input.c
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@ -827,11 +827,48 @@ static int em28xx_ir_fini(struct em28xx *dev)
return 0; return 0;
} }
static int em28xx_ir_suspend(struct em28xx *dev)
{
struct em28xx_IR *ir = dev->ir;
if (dev->is_audio_only)
return 0;
em28xx_info("Suspending input extension");
if (ir)
cancel_delayed_work_sync(&ir->work);
cancel_delayed_work_sync(&dev->buttons_query_work);
/* is canceling delayed work sufficient or does the rc event
kthread needs stopping? kthread is stopped in
ir_raw_event_unregister() */
return 0;
}
static int em28xx_ir_resume(struct em28xx *dev)
{
struct em28xx_IR *ir = dev->ir;
if (dev->is_audio_only)
return 0;
em28xx_info("Resuming input extension");
/* if suspend calls ir_raw_event_unregister(), the should call
ir_raw_event_register() */
if (ir)
schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
if (dev->num_button_polling_addresses)
schedule_delayed_work(&dev->buttons_query_work,
msecs_to_jiffies(dev->button_polling_interval));
return 0;
}
static struct em28xx_ops rc_ops = { static struct em28xx_ops rc_ops = {
.id = EM28XX_RC, .id = EM28XX_RC,
.name = "Em28xx Input Extension", .name = "Em28xx Input Extension",
.init = em28xx_ir_init, .init = em28xx_ir_init,
.fini = em28xx_ir_fini, .fini = em28xx_ir_fini,
.suspend = em28xx_ir_suspend,
.resume = em28xx_ir_resume,
}; };
static int __init em28xx_rc_register(void) static int __init em28xx_rc_register(void)