bus/fsl-mc: support dma configure for devices on fsl-mc bus

This patch adds support of dma configuration for devices on fsl-mc
bus using 'dma_configure' callback for busses. Also, directly calling
arch_setup_dma_ops is removed from the fsl-mc bus.

Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
Reviewed-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c
index 5d8266c..fa43c7d 100644 (file)
--- a/drivers/bus/fsl-mc/fsl-mc-bus.c
+++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
@@ -127,6 +127,16 @@ static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
        return 0;
 }
 
+static int fsl_mc_dma_configure(struct device *dev)
+{
+       struct device *dma_dev = dev;
+
+       while (dev_is_fsl_mc(dma_dev))
+               dma_dev = dma_dev->parent;
+
+       return of_dma_configure(dev, dma_dev->of_node, 0);
+}
+
 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
                             char *buf)
 {
@@ -148,6 +158,7 @@ struct bus_type fsl_mc_bus_type = {
        .name = "fsl-mc",
        .match = fsl_mc_bus_match,
        .uevent = fsl_mc_bus_uevent,
+       .dma_configure  = fsl_mc_dma_configure,
        .dev_groups = fsl_mc_dev_groups,
 };
 EXPORT_SYMBOL_GPL(fsl_mc_bus_type);
@@ -633,10 +644,6 @@ int fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc,
                        goto error_cleanup_dev;
        }
 
-       /* Objects are coherent, unless 'no shareability' flag set. */
-       if (!(obj_desc->flags & FSL_MC_OBJ_FLAG_NO_MEM_SHAREABILITY))
-               arch_setup_dma_ops(&mc_dev->dev, 0, 0, NULL, true);
-
        /*
         * The device-specific probe callback will get invoked by device_add()
         */