forked from luck/tmp_suning_uos_patched
dma: mxs-dma: add device tree probe support
Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Rob Landley <rob@landley.net> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Huang Shijie <b32955@freescale.com> Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org> Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Marek Vasut <marex@denx.de> Acked-by: Vinod Koul <vinod.koul@intel.com>
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19
Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt
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19
Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt
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@ -0,0 +1,19 @@
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* Freescale MXS DMA
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Required properties:
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- compatible : Should be "fsl,<chip>-dma-apbh" or "fsl,<chip>-dma-apbx"
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- reg : Should contain registers location and length
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Supported chips:
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imx23, imx28.
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Examples:
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dma-apbh@80004000 {
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compatible = "fsl,imx28-dma-apbh";
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reg = <0x80004000 2000>;
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};
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dma-apbx@80024000 {
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compatible = "fsl,imx28-dma-apbx";
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reg = <0x80024000 2000>;
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};
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@ -22,8 +22,11 @@
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#include <linux/platform_device.h>
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#include <linux/dmaengine.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/fsl/mxs-dma.h>
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#include <linux/stmp_device.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <asm/irq.h>
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#include <mach/mxs.h>
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@ -177,6 +180,15 @@ static struct platform_device_id mxs_dma_ids[] = {
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}
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};
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static const struct of_device_id mxs_dma_dt_ids[] = {
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{ .compatible = "fsl,imx23-dma-apbh", .data = &mxs_dma_ids[0], },
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{ .compatible = "fsl,imx23-dma-apbx", .data = &mxs_dma_ids[1], },
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{ .compatible = "fsl,imx28-dma-apbh", .data = &mxs_dma_ids[2], },
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{ .compatible = "fsl,imx28-dma-apbx", .data = &mxs_dma_ids[3], },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, mxs_dma_dt_ids);
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static struct mxs_dma_chan *to_mxs_dma_chan(struct dma_chan *chan)
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{
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return container_of(chan, struct mxs_dma_chan, chan);
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@ -652,10 +664,9 @@ static int __init mxs_dma_init(struct mxs_dma_engine *mxs_dma)
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static int __init mxs_dma_probe(struct platform_device *pdev)
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{
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const struct platform_device_id *id_entry =
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platform_get_device_id(pdev);
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const struct mxs_dma_type *dma_type =
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(struct mxs_dma_type *)id_entry->driver_data;
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const struct platform_device_id *id_entry;
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const struct of_device_id *of_id;
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const struct mxs_dma_type *dma_type;
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struct mxs_dma_engine *mxs_dma;
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struct resource *iores;
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int ret, i;
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@ -664,8 +675,15 @@ static int __init mxs_dma_probe(struct platform_device *pdev)
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if (!mxs_dma)
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return -ENOMEM;
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mxs_dma->dev_id = dma_type->id;
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of_id = of_match_device(mxs_dma_dt_ids, &pdev->dev);
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if (of_id)
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id_entry = of_id->data;
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else
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id_entry = platform_get_device_id(pdev);
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dma_type = (struct mxs_dma_type *)id_entry->driver_data;
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mxs_dma->type = dma_type->type;
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mxs_dma->dev_id = dma_type->id;
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iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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@ -751,6 +769,7 @@ static int __init mxs_dma_probe(struct platform_device *pdev)
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static struct platform_driver mxs_dma_driver = {
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.driver = {
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.name = "mxs-dma",
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.of_match_table = mxs_dma_dt_ids,
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},
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.id_table = mxs_dma_ids,
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};
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