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>
This commit is contained in:
parent
8c92013643
commit
90c9abc5b7
19
Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt
Normal file
19
Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt
Normal file
|
@ -0,0 +1,19 @@
|
|||
* Freescale MXS DMA
|
||||
|
||||
Required properties:
|
||||
- compatible : Should be "fsl,<chip>-dma-apbh" or "fsl,<chip>-dma-apbx"
|
||||
- reg : Should contain registers location and length
|
||||
|
||||
Supported chips:
|
||||
imx23, imx28.
|
||||
|
||||
Examples:
|
||||
dma-apbh@80004000 {
|
||||
compatible = "fsl,imx28-dma-apbh";
|
||||
reg = <0x80004000 2000>;
|
||||
};
|
||||
|
||||
dma-apbx@80024000 {
|
||||
compatible = "fsl,imx28-dma-apbx";
|
||||
reg = <0x80024000 2000>;
|
||||
};
|
|
@ -22,8 +22,11 @@
|
|||
#include <linux/platform_device.h>
|
||||
#include <linux/dmaengine.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/fsl/mxs-dma.h>
|
||||
#include <linux/stmp_device.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_device.h>
|
||||
|
||||
#include <asm/irq.h>
|
||||
#include <mach/mxs.h>
|
||||
|
@ -177,6 +180,15 @@ static struct platform_device_id mxs_dma_ids[] = {
|
|||
}
|
||||
};
|
||||
|
||||
static const struct of_device_id mxs_dma_dt_ids[] = {
|
||||
{ .compatible = "fsl,imx23-dma-apbh", .data = &mxs_dma_ids[0], },
|
||||
{ .compatible = "fsl,imx23-dma-apbx", .data = &mxs_dma_ids[1], },
|
||||
{ .compatible = "fsl,imx28-dma-apbh", .data = &mxs_dma_ids[2], },
|
||||
{ .compatible = "fsl,imx28-dma-apbx", .data = &mxs_dma_ids[3], },
|
||||
{ /* sentinel */ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, mxs_dma_dt_ids);
|
||||
|
||||
static struct mxs_dma_chan *to_mxs_dma_chan(struct dma_chan *chan)
|
||||
{
|
||||
return container_of(chan, struct mxs_dma_chan, chan);
|
||||
|
@ -652,10 +664,9 @@ err_out:
|
|||
|
||||
static int __init mxs_dma_probe(struct platform_device *pdev)
|
||||
{
|
||||
const struct platform_device_id *id_entry =
|
||||
platform_get_device_id(pdev);
|
||||
const struct mxs_dma_type *dma_type =
|
||||
(struct mxs_dma_type *)id_entry->driver_data;
|
||||
const struct platform_device_id *id_entry;
|
||||
const struct of_device_id *of_id;
|
||||
const struct mxs_dma_type *dma_type;
|
||||
struct mxs_dma_engine *mxs_dma;
|
||||
struct resource *iores;
|
||||
int ret, i;
|
||||
|
@ -664,8 +675,15 @@ static int __init mxs_dma_probe(struct platform_device *pdev)
|
|||
if (!mxs_dma)
|
||||
return -ENOMEM;
|
||||
|
||||
mxs_dma->dev_id = dma_type->id;
|
||||
of_id = of_match_device(mxs_dma_dt_ids, &pdev->dev);
|
||||
if (of_id)
|
||||
id_entry = of_id->data;
|
||||
else
|
||||
id_entry = platform_get_device_id(pdev);
|
||||
|
||||
dma_type = (struct mxs_dma_type *)id_entry->driver_data;
|
||||
mxs_dma->type = dma_type->type;
|
||||
mxs_dma->dev_id = dma_type->id;
|
||||
|
||||
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
|
||||
|
@ -751,6 +769,7 @@ err_request_region:
|
|||
static struct platform_driver mxs_dma_driver = {
|
||||
.driver = {
|
||||
.name = "mxs-dma",
|
||||
.of_match_table = mxs_dma_dt_ids,
|
||||
},
|
||||
.id_table = mxs_dma_ids,
|
||||
};
|
||||
|
|
Loading…
Reference in a new issue