staging: vchiq_arm: Set up dma ranges on child devices

The VCHIQ driver now loads the audio, camera, codec, and vc-sm
drivers as platform drivers. However they were not being given
the correct DMA configuration.

Call of_dma_configure with the parent (VCHIQ) parameters to be
inherited by the child.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
index 40e8e04..b955fe7 100644 (file)
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -3585,6 +3585,7 @@ static struct platform_device *
 vchiq_register_child(struct platform_device *pdev, const char *name)
 {
        struct platform_device_info pdevinfo;
+       struct platform_device *new_dev;
 
        memset(&pdevinfo, 0, sizeof(pdevinfo));
 
@@ -3593,7 +3594,17 @@ vchiq_register_child(struct platform_device *pdev, const char *name)
        pdevinfo.id = PLATFORM_DEVID_NONE;
        pdevinfo.dma_mask = DMA_BIT_MASK(32);
 
-       return platform_device_register_full(&pdevinfo);
+       new_dev = platform_device_register_full(&pdevinfo);
+       if (!new_dev)
+               return NULL;
+
+       /*
+        * We want the dma-ranges etc to be copied from the parent VCHIQ device
+        * to be passed on to the children too.
+        */
+       of_dma_configure(&new_dev->dev, pdev->dev.of_node, true);
+
+       return new_dev;
 }
 
 static int vchiq_probe(struct platform_device *pdev)