ARM: OMAP: omap_device: keep track of driver bound status

Use the bus notifier to keep track of driver bound status by adding a
new internal field to struct omap_device: _driver_status.

This will be useful for follow-up patches which need to know whether
or not a driver is bound in order to make intelligent omap_device
enable/idle decisions.

Reviewed-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

1 files changed, 9 insertions, 5 deletions

diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index c490240bb82..1d1b5ff7830 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -385,17 +385,21 @@ static int _omap_device_notifier_call(struct notifier_block *nb,
                                       unsigned long event, void *dev)
 {
         struct platform_device *pdev = to_platform_device(dev);
+        struct omap_device *od;
 
         switch (event) {
-        case BUS_NOTIFY_ADD_DEVICE:
-                if (pdev->dev.of_node)
-                        omap_device_build_from_dt(pdev);
-                break;
-
         case BUS_NOTIFY_DEL_DEVICE:
                 if (pdev->archdata.od)
                         omap_device_delete(pdev->archdata.od);
                 break;
+        case BUS_NOTIFY_ADD_DEVICE:
+                if (pdev->dev.of_node)
+                        omap_device_build_from_dt(pdev);
+                /* fall through */
+        default:
+                od = to_omap_device(pdev);
+                if (od)
+                        od->_driver_status = event;
         }
 
         return NOTIFY_DONE;