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ARM/dmaengine: edma: Remove limitation on the number of eDMA controllers 

Since the driver stack no longer depends on lookup with id number in a
global array of pointers, the limitation for the number of eDMAs are no
longer needed. We can handle as many eDMAs in legacy and DT boot as we have
memory for them to allocate the needed structures.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Peter Ujfalusi 2015-10-14 14:42:50 +03:00 committed by Vinod Koul
parent ca304fa9bb
commit b2c843a196
2 changed files with 13 additions and 26 deletions
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22
arch/arm/common/edma.c
View File

@ -1227,24 +1227,7 @@ static int edma_probe(struct platform_device *pdev)
.parent = &pdev->dev,
};
/* When booting with DT the pdev->id is -1 */
if (dev_id < 0)
dev_id = arch_num_cc;
if (dev_id >= EDMA_MAX_CC) {
dev_err(dev,
"eDMA3 with device id 0 and 1 is supported (id: %d)\n",
dev_id);
return -EINVAL;
}
if (node) {
/* Check if this is a second instance registered */
if (arch_num_cc) {
dev_err(dev, "only one EDMA instance is supported via DT\n");
return -ENODEV;
}
info = edma_setup_info_from_dt(dev, node);
if (IS_ERR(info)) {
dev_err(dev, "failed to get DT data\n");
@ -1278,6 +1261,11 @@ static int edma_probe(struct platform_device *pdev)
cc->dev = dev;
cc->id = dev_id;
/* When booting with DT the pdev->id is -1 */
if (dev_id < 0) {
cc->id = 0;
dev_id = arch_num_cc;
}
dev_set_drvdata(dev, cc);
cc->base = devm_ioremap_resource(dev, mem);

17
drivers/dma/edma.c
View File

@ -991,14 +991,12 @@ static void edma_dma_init(struct edma_cc *ecc, struct dma_device *dma,
INIT_LIST_HEAD(&dma->channels);
}
static struct of_dma_filter_info edma_filter_info = {
.filter_fn = edma_filter_fn,
};
static int edma_probe(struct platform_device *pdev)
{
struct edma_cc *ecc;
struct device_node *parent_node = pdev->dev.parent->of_node;
struct platform_device *parent_pdev =
to_platform_device(pdev->dev.parent);
int ret;
ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
@ -1015,7 +1013,10 @@ static int edma_probe(struct platform_device *pdev)
if (!ecc->cc)
return -ENODEV;
ecc->ctlr = pdev->id;
ecc->ctlr = parent_pdev->id;
if (ecc->ctlr < 0)
ecc->ctlr = 0;
ecc->dummy_slot = edma_alloc_slot(ecc->cc, EDMA_SLOT_ANY);
if (ecc->dummy_slot < 0) {
dev_err(&pdev->dev, "Can't allocate PaRAM dummy slot\n");
@ -1038,10 +1039,8 @@ static int edma_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, ecc);
if (parent_node) {
dma_cap_set(DMA_SLAVE, edma_filter_info.dma_cap);
dma_cap_set(DMA_CYCLIC, edma_filter_info.dma_cap);
of_dma_controller_register(parent_node, of_dma_simple_xlate,
&edma_filter_info);
of_dma_controller_register(parent_node, of_dma_xlate_by_chan_id,
&ecc->dma_slave);
}
dev_info(&pdev->dev, "TI EDMA DMA engine driver\n");