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authorZhangfei Gao <zhangfei.gao@marvell.com>2012-09-03 07:03:46 +0400
committerVinod Koul <vinod.koul@linux.intel.com>2012-09-14 06:44:08 +0400
commitf1a7757008b810217b2380d01b740244f21c09bd (patch)
treead9a9bcfab0590f83dbef05e5f2bb4f4fce9002b /drivers/dma
parentc8acd6aa6bed3c0fd7898202f4ebc534db9085f2 (diff)
downloadlinux-f1a7757008b810217b2380d01b740244f21c09bd.tar.xz
dmaengine: mmp_tdma: add dt support
Signed-off-by: Zhangfei Gao <zhangfei.gao@marvell.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/mmp_tdma.c51
1 files changed, 31 insertions, 20 deletions
diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c
index 8a15cf2163dc..b93d73ca84ff 100644
--- a/drivers/dma/mmp_tdma.c
+++ b/drivers/dma/mmp_tdma.c
@@ -20,6 +20,7 @@
#include <linux/device.h>
#include <mach/regs-icu.h>
#include <mach/sram.h>
+#include <linux/of_device.h>
#include "dmaengine.h"
@@ -127,7 +128,6 @@ struct mmp_tdma_device {
void __iomem *base;
struct dma_device device;
struct mmp_tdma_chan *tdmac[TDMA_CHANNEL_NUM];
- int irq;
};
#define to_mmp_tdma_chan(dchan) container_of(dchan, struct mmp_tdma_chan, chan)
@@ -492,7 +492,7 @@ static int __devinit mmp_tdma_chan_init(struct mmp_tdma_device *tdev,
return -ENOMEM;
}
if (irq)
- tdmac->irq = irq + idx;
+ tdmac->irq = irq;
tdmac->dev = tdev->dev;
tdmac->chan.device = &tdev->device;
tdmac->idx = idx;
@@ -505,34 +505,43 @@ static int __devinit mmp_tdma_chan_init(struct mmp_tdma_device *tdev,
/* add the channel to tdma_chan list */
list_add_tail(&tdmac->chan.device_node,
&tdev->device.channels);
-
return 0;
}
+static struct of_device_id mmp_tdma_dt_ids[] = {
+ { .compatible = "marvell,adma-1.0", .data = (void *)MMP_AUD_TDMA},
+ { .compatible = "marvell,pxa910-squ", .data = (void *)PXA910_SQU},
+ {}
+};
+MODULE_DEVICE_TABLE(of, mmp_tdma_dt_ids);
+
static int __devinit mmp_tdma_probe(struct platform_device *pdev)
{
- const struct platform_device_id *id = platform_get_device_id(pdev);
- enum mmp_tdma_type type = id->driver_data;
+ enum mmp_tdma_type type;
+ const struct of_device_id *of_id;
struct mmp_tdma_device *tdev;
struct resource *iores;
int i, ret;
- int irq = 0;
+ int irq = 0, irq_num = 0;
int chan_num = TDMA_CHANNEL_NUM;
+ of_id = of_match_device(mmp_tdma_dt_ids, &pdev->dev);
+ if (of_id)
+ type = (enum mmp_tdma_type) of_id->data;
+ else
+ type = platform_get_device_id(pdev)->driver_data;
+
/* always have couple channels */
tdev = devm_kzalloc(&pdev->dev, sizeof(*tdev), GFP_KERNEL);
if (!tdev)
return -ENOMEM;
tdev->dev = &pdev->dev;
- iores = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!iores)
- return -EINVAL;
- if (resource_size(iores) != chan_num)
- tdev->irq = iores->start;
- else
- irq = iores->start;
+ for (i = 0; i < chan_num; i++) {
+ if (platform_get_irq(pdev, i) > 0)
+ irq_num++;
+ }
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!iores)
@@ -542,25 +551,26 @@ static int __devinit mmp_tdma_probe(struct platform_device *pdev)
if (!tdev->base)
return -EADDRNOTAVAIL;
- if (tdev->irq) {
- ret = devm_request_irq(&pdev->dev, tdev->irq,
+ INIT_LIST_HEAD(&tdev->device.channels);
+
+ if (irq_num != chan_num) {
+ irq = platform_get_irq(pdev, 0);
+ ret = devm_request_irq(&pdev->dev, irq,
mmp_tdma_int_handler, IRQF_DISABLED, "tdma", tdev);
if (ret)
return ret;
}
- dma_cap_set(DMA_SLAVE, tdev->device.cap_mask);
- dma_cap_set(DMA_CYCLIC, tdev->device.cap_mask);
-
- INIT_LIST_HEAD(&tdev->device.channels);
-
/* initialize channel parameters */
for (i = 0; i < chan_num; i++) {
+ irq = (irq_num != chan_num) ? 0 : platform_get_irq(pdev, i);
ret = mmp_tdma_chan_init(tdev, i, irq, type);
if (ret)
return ret;
}
+ dma_cap_set(DMA_SLAVE, tdev->device.cap_mask);
+ dma_cap_set(DMA_CYCLIC, tdev->device.cap_mask);
tdev->device.dev = &pdev->dev;
tdev->device.device_alloc_chan_resources =
mmp_tdma_alloc_chan_resources;
@@ -595,6 +605,7 @@ static struct platform_driver mmp_tdma_driver = {
.driver = {
.name = "mmp-tdma",
.owner = THIS_MODULE,
+ .of_match_table = mmp_tdma_dt_ids,
},
.id_table = mmp_tdma_id_table,
.probe = mmp_tdma_probe,