staging: vchiq_arm: Set up dma ranges on child devices

raspberrypi inclusion
category: feature
bugzilla: 50432

--------------------------------

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: NDave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c

@@ -2708,6 +2708,12 @@ vchiq_register_child(struct platform_device *pdev, const char *name)
 		child = 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 child;
 }