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authorPeter Ujfalusi <peter.ujfalusi@ti.com>2015-04-09 12:35:51 +0300
committerVinod Koul <vinod.koul@intel.com>2015-05-09 17:11:25 +0530
commitde506089e78bc7cea77c64a836f6cfc7fa592219 (patch)
tree2ed28ee84c819a073a13db317ac133d5e5f78feb /drivers
parent341ce712868d90fd68cc4635b7c9963a026f9207 (diff)
dmaengine: omap-dma: Take DMA request number from DT if it is available
Use the dma-requests property from DT to get the number of DMA requests. In case of legacy boot or failure to find the property, use the default 127 as number of requests. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/dma/omap-dma.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c
index 4065963fbffb..211c9c1edf08 100644
--- a/drivers/dma/omap-dma.c
+++ b/drivers/dma/omap-dma.c
@@ -34,6 +34,7 @@ struct omap_dmadev {
const struct omap_dma_reg *reg_map;
struct omap_system_dma_plat_info *plat;
bool legacy;
+ unsigned dma_requests;
spinlock_t irq_lock;
uint32_t irq_enable_mask;
struct omap_chan *lch_map[OMAP_SDMA_CHANNELS];
@@ -1119,7 +1120,16 @@ static int omap_dma_probe(struct platform_device *pdev)
tasklet_init(&od->task, omap_dma_sched, (unsigned long)od);
- for (i = 0; i < OMAP_SDMA_REQUESTS; i++) {
+ od->dma_requests = OMAP_SDMA_REQUESTS;
+ if (pdev->dev.of_node && of_property_read_u32(pdev->dev.of_node,
+ "dma-requests",
+ &od->dma_requests)) {
+ dev_info(&pdev->dev,
+ "Missing dma-requests property, using %u.\n",
+ OMAP_SDMA_REQUESTS);
+ }
+
+ for (i = 0; i < od->dma_requests; i++) {
rc = omap_dma_chan_init(od, i);
if (rc) {
omap_dma_free(od);