dmaengine: OMAP: Register SDMA controller with Device Tree DMA driver
If the device-tree blob is present during boot, then register the SDMA
controller with the device-tree DMA driver so that we can use device-tree
to look-up DMA client information.
Signed-off-by: Jon Hunter <jon-hunter@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c
index 08b43bf..ec3fc4f 100644
--- a/drivers/dma/omap-dma.c
+++ b/drivers/dma/omap-dma.c
@@ -16,6 +16,8 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
+#include <linux/of_dma.h>
+#include <linux/of_device.h>
#include "virt-dma.h"
@@ -67,6 +69,10 @@
[OMAP_DMA_DATA_TYPE_S32] = 4,
};
+static struct of_dma_filter_info omap_dma_info = {
+ .filter_fn = omap_dma_filter_fn,
+};
+
static inline struct omap_dmadev *to_omap_dma_dev(struct dma_device *d)
{
return container_of(d, struct omap_dmadev, ddev);
@@ -629,8 +635,22 @@
pr_warn("OMAP-DMA: failed to register slave DMA engine device: %d\n",
rc);
omap_dma_free(od);
- } else {
- platform_set_drvdata(pdev, od);
+ return rc;
+ }
+
+ platform_set_drvdata(pdev, od);
+
+ if (pdev->dev.of_node) {
+ omap_dma_info.dma_cap = od->ddev.cap_mask;
+
+ /* Device-tree DMA controller registration */
+ rc = of_dma_controller_register(pdev->dev.of_node,
+ of_dma_simple_xlate, &omap_dma_info);
+ if (rc) {
+ pr_warn("OMAP-DMA: failed to register DMA controller\n");
+ dma_async_device_unregister(&od->ddev);
+ omap_dma_free(od);
+ }
}
dev_info(&pdev->dev, "OMAP DMA engine driver\n");
@@ -642,18 +662,32 @@
{
struct omap_dmadev *od = platform_get_drvdata(pdev);
+ if (pdev->dev.of_node)
+ of_dma_controller_free(pdev->dev.of_node);
+
dma_async_device_unregister(&od->ddev);
omap_dma_free(od);
return 0;
}
+static const struct of_device_id omap_dma_match[] = {
+ { .compatible = "ti,omap2420-sdma", },
+ { .compatible = "ti,omap2430-sdma", },
+ { .compatible = "ti,omap3430-sdma", },
+ { .compatible = "ti,omap3630-sdma", },
+ { .compatible = "ti,omap4430-sdma", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, omap_dma_match);
+
static struct platform_driver omap_dma_driver = {
.probe = omap_dma_probe,
.remove = omap_dma_remove,
.driver = {
.name = "omap-dma-engine",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(omap_dma_match),
},
};