Commit 8d30662a authored by Jon Hunter's avatar Jon Hunter Committed by Vinod Koul
Browse files

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: default avatarJon Hunter <jon-hunter@ti.com>
Reviewed-by: default avatarFelipe Balbi <balbi@ti.com>
Acked-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent f5b9b77e
......@@ -28,6 +28,7 @@
#include <linux/init.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/of.h>
#include <linux/omap-dma.h>
#include "soc.h"
......@@ -304,6 +305,9 @@ static int __init omap2_system_dma_init(void)
if (res)
return res;
if (of_have_populated_dt())
return res;
pdev = platform_device_register_full(&omap_dma_dev_info);
if (IS_ERR(pdev))
return PTR_ERR(pdev);
......
......@@ -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 @@ static const unsigned es_bytes[] = {
[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 @@ static int omap_dma_probe(struct platform_device *pdev)
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 @@ static int omap_dma_remove(struct platform_device *pdev)
{
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),
},
};
......
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