2 files changed, 60 insertions, 12 deletions

diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 6132972aff37..5857b9cd6eb9 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -615,6 +615,7 @@ int omap_hwmod_softreset(struct omap_hwmod *oh);
 
 int omap_hwmod_count_resources(struct omap_hwmod *oh);
 int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res);
+int omap_hwmod_fill_dma_resources(struct omap_hwmod *oh, struct resource *res);
 int omap_hwmod_get_resource_byname(struct omap_hwmod *oh, unsigned int type,
                                    const char *name, struct resource *res);
 
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index ff57b5aeba4e..6f5c58096819 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -494,6 +494,33 @@ static int omap_device_fill_resources(struct omap_device *od,
 }
 
 /**
+ * _od_fill_dma_resources - fill in array of struct resource with dma resources
+ * @od: struct omap_device *
+ * @res: pointer to an array of struct resource to be filled in
+ *
+ * Populate one or more empty struct resource pointed to by @res with
+ * the dma resource data for this omap_device @od.  Used by
+ * omap_device_alloc() after calling omap_device_count_resources().
+ *
+ * Ideally this function would not be needed at all.  If we have
+ * mechanism to get dma resources from DT.
+ *
+ * Returns 0.
+ */
+static int _od_fill_dma_resources(struct omap_device *od,
+                                      struct resource *res)
+{
+        int i, r;
+
+        for (i = 0; i < od->hwmods_cnt; i++) {
+                r = omap_hwmod_fill_dma_resources(od->hwmods[i], res);
+                res += r;
+        }
+
+        return 0;
+}
+
+/**
  * omap_device_alloc - allocate an omap_device
  * @pdev: platform_device that will be included in this omap_device
  * @oh: ptr to the single omap_hwmod that backs this omap_device
@@ -532,24 +559,44 @@ struct omap_device *omap_device_alloc(struct platform_device *pdev,
         od->hwmods = hwmods;
         od->pdev = pdev;
 
+        res_count = omap_device_count_resources(od);
         /*
-         * HACK: Ideally the resources from DT should match, and hwmod
-         * should just add the missing ones. Since the name is not
-         * properly populated by DT, stick to hwmod resources only.
+         * DT Boot:
+         *   OF framework will construct the resource structure (currently
+         *   does for MEM & IRQ resource) and we should respect/use these
+         *   resources, killing hwmod dependency.
+         *   If pdev->num_resources > 0, we assume that MEM & IRQ resources
+         *   have been allocated by OF layer already (through DTB).
+         *
+         * Non-DT Boot:
+         *   Here, pdev->num_resources = 0, and we should get all the
+         *   resources from hwmod.
+         *
+         * TODO: Once DMA resource is available from OF layer, we should
+         *   kill filling any resources from hwmod.
          */
-        if (pdev->num_resources && pdev->resource)
-                dev_warn(&pdev->dev, "%s(): resources already allocated %d\n",
-                        __func__, pdev->num_resources);
-
-        res_count = omap_device_count_resources(od);
-        if (res_count > 0) {
-                dev_dbg(&pdev->dev, "%s(): resources allocated from hwmod %d\n",
-                        __func__, res_count);
+        if (res_count > pdev->num_resources) {
+                /* Allocate resources memory to account for new resources */
                 res = kzalloc(sizeof(struct resource) * res_count, GFP_KERNEL);
                 if (!res)
                         goto oda_exit3;
 
-                omap_device_fill_resources(od, res);
+                /*
+                 * If pdev->num_resources > 0, then assume that,
+                 * MEM and IRQ resources will only come from DT and only
+                 * fill DMA resource from hwmod layer.
+                 */
+                if (pdev->num_resources && pdev->resource) {
+                        dev_dbg(&pdev->dev, "%s(): resources already allocated %d\n",
+                                __func__, res_count);
+                        memcpy(res, pdev->resource,
+                               sizeof(struct resource) * pdev->num_resources);
+                        _od_fill_dma_resources(od, &res[pdev->num_resources]);
+                } else {
+                        dev_dbg(&pdev->dev, "%s(): using resources from hwmod %d\n",
+                                __func__, res_count);
+                        omap_device_fill_resources(od, res);
+                }
 
                 ret = platform_device_add_resources(pdev, res, res_count);
                 kfree(res);