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authorTakashi Iwai <tiwai@suse.de>2005-11-29 09:09:32 +0100
committerJaroslav Kysela <perex@suse.cz>2006-01-03 12:31:19 +0100
commit4c98cfef2efa6b6662ac28c4f0069964bbd9fdf9 (patch)
tree4ad45704bcf9e43085164d8d7ca6f07d6f1884dd
parent0ba656d0b2319b76fbebd01c1c9ba5ca8eb33fb1 (diff)
[ALSA] PATCH] Add PM support to PnP drivers
Add suspend/resume callback to pnp_driver and pnp_card_driver. Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--drivers/pnp/card.c25
-rw-r--r--drivers/pnp/driver.c20
-rw-r--r--include/linux/pnp.h5
3 files changed, 50 insertions, 0 deletions
diff --git a/drivers/pnp/card.c b/drivers/pnp/card.c
index bd7c966ea2d..0ecbe4edbec 100644
--- a/drivers/pnp/card.c
+++ b/drivers/pnp/card.c
@@ -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);
diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
index d3ccce706ab..ea2cb9a8b21 100644
--- a/drivers/pnp/driver.c
+++ b/drivers/pnp/driver.c
@@ -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,
};
diff --git a/include/linux/pnp.h b/include/linux/pnp.h
index 584d57cb393..472319fcf63 100644
--- a/include/linux/pnp.h
+++ b/include/linux/pnp.h
@@ -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;
};