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[ALSA] PATCH] Add PM support to PnP drivers

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Add suspend/resume callback to pnp_driver and pnp_card_driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2005-11-29 09:09:32 +01:00 committed by Jaroslav Kysela
parent 0ba656d0b2
commit 4c98cfef2e
3 changed files with 50 additions and 0 deletions
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25
drivers/pnp/card.c
View file

@ -69,6 +69,7 @@ static int card_probe(struct pnp_card * card, struct pnp_card_driver * drv)
return 0;
clink->card = card;
clink->driver = drv;
clink->pm_state = PMSG_ON;
if (drv->probe) {
if (drv->probe(clink, id)>=0)
return 1;
@ -333,6 +334,28 @@ void pnp_release_card_device(struct pnp_dev * dev)
up_write(&dev->dev.bus->subsys.rwsem);
}
/*
* suspend/resume callbacks
*/
static int card_suspend(struct pnp_dev *dev, pm_message_t state)
{
struct pnp_card_link *link = dev->card_link;
if (link->pm_state.event == state.event)
return 0;
link->pm_state = state;
return link->driver->suspend(link, state);
}
static int card_resume(struct pnp_dev *dev)
{
struct pnp_card_link *link = dev->card_link;
if (link->pm_state.event == PM_EVENT_ON)
return 0;
link->pm_state = PMSG_ON;
link->driver->resume(link);
return 0;
}
/**
* pnp_register_card_driver - registers a PnP card driver with the PnP Layer
* @drv: pointer to the driver to register
@ -348,6 +371,8 @@ int pnp_register_card_driver(struct pnp_card_driver * drv)
drv->link.flags = drv->flags;
drv->link.probe = NULL;
drv->link.remove = &card_remove_first;
drv->link.suspend = drv->suspend ? card_suspend : NULL;
drv->link.resume = drv->resume ? card_resume : NULL;
spin_lock(&pnp_lock);
list_add_tail(&drv->global_list, &pnp_card_drivers);

20
drivers/pnp/driver.c
View file

@ -146,10 +146,30 @@ static int pnp_bus_match(struct device *dev, struct device_driver *drv)
return 1;
}
static int pnp_bus_suspend(struct device *dev, pm_message_t state)
{
struct pnp_dev * pnp_dev = to_pnp_dev(dev);
struct pnp_driver * pnp_drv = pnp_dev->driver;
if (pnp_drv && pnp_drv->suspend)
return pnp_drv->suspend(pnp_dev, state);
return 0;
}
static void pnp_bus_resume(struct device *dev)
{
struct pnp_dev * pnp_dev = to_pnp_dev(dev);
struct pnp_driver * pnp_drv = pnp_dev->driver;
if (pnp_drv && pnp_drv->resume)
pnp_drv->resume(pnp_dev);
}
struct bus_type pnp_bus_type = {
.name = "pnp",
.match = pnp_bus_match,
.suspend = pnp_bus_suspend,
.resume = pnp_bus_resume,
};

5
include/linux/pnp.h
View file

@ -162,6 +162,7 @@ struct pnp_card_link {
struct pnp_card * card;
struct pnp_card_driver * driver;
void * driver_data;
pm_message_t pm_state;
};
static inline void *pnp_get_card_drvdata (struct pnp_card_link *pcard)
@ -294,6 +295,8 @@ struct pnp_driver {
unsigned int flags;
int (*probe) (struct pnp_dev *dev, const struct pnp_device_id *dev_id);
void (*remove) (struct pnp_dev *dev);
int (*suspend) (struct pnp_dev *dev, pm_message_t state);
int (*resume) (struct pnp_dev *dev);
struct device_driver driver;
};
@ -306,6 +309,8 @@ struct pnp_card_driver {
unsigned int flags;
int (*probe) (struct pnp_card_link *card, const struct pnp_card_device_id *card_id);
void (*remove) (struct pnp_card_link *card);
int (*suspend) (struct pnp_card_link *card, pm_message_t state);
int (*resume) (struct pnp_card_link *card);
struct pnp_driver link;
};