[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>

1 files changed, 20 insertions, 0 deletions

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,
 };