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>
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Коммит
8d30662aac
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@ -28,6 +28,7 @@
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/of.h>
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#include <linux/omap-dma.h>
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#include "soc.h"
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@ -304,6 +305,9 @@ static int __init omap2_system_dma_init(void)
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if (res)
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return res;
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if (of_have_populated_dt())
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return res;
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pdev = platform_device_register_full(&omap_dma_dev_info);
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if (IS_ERR(pdev))
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return PTR_ERR(pdev);
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@ -16,6 +16,8 @@
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/of_dma.h>
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#include <linux/of_device.h>
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#include "virt-dma.h"
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@ -67,6 +69,10 @@ static const unsigned es_bytes[] = {
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[OMAP_DMA_DATA_TYPE_S32] = 4,
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};
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static struct of_dma_filter_info omap_dma_info = {
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.filter_fn = omap_dma_filter_fn,
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};
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static inline struct omap_dmadev *to_omap_dma_dev(struct dma_device *d)
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{
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return container_of(d, struct omap_dmadev, ddev);
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@ -629,8 +635,22 @@ static int omap_dma_probe(struct platform_device *pdev)
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pr_warn("OMAP-DMA: failed to register slave DMA engine device: %d\n",
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rc);
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omap_dma_free(od);
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} else {
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return rc;
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}
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platform_set_drvdata(pdev, od);
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if (pdev->dev.of_node) {
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omap_dma_info.dma_cap = od->ddev.cap_mask;
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/* Device-tree DMA controller registration */
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rc = of_dma_controller_register(pdev->dev.of_node,
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of_dma_simple_xlate, &omap_dma_info);
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if (rc) {
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pr_warn("OMAP-DMA: failed to register DMA controller\n");
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dma_async_device_unregister(&od->ddev);
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omap_dma_free(od);
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}
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}
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dev_info(&pdev->dev, "OMAP DMA engine driver\n");
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@ -642,18 +662,32 @@ static int omap_dma_remove(struct platform_device *pdev)
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{
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struct omap_dmadev *od = platform_get_drvdata(pdev);
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if (pdev->dev.of_node)
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of_dma_controller_free(pdev->dev.of_node);
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dma_async_device_unregister(&od->ddev);
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omap_dma_free(od);
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return 0;
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}
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static const struct of_device_id omap_dma_match[] = {
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{ .compatible = "ti,omap2420-sdma", },
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{ .compatible = "ti,omap2430-sdma", },
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{ .compatible = "ti,omap3430-sdma", },
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{ .compatible = "ti,omap3630-sdma", },
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{ .compatible = "ti,omap4430-sdma", },
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{},
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};
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MODULE_DEVICE_TABLE(of, omap_dma_match);
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static struct platform_driver omap_dma_driver = {
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.probe = omap_dma_probe,
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.remove = omap_dma_remove,
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.driver = {
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.name = "omap-dma-engine",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(omap_dma_match),
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},
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};
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