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>
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c
index 4065963..211c9c1 100644
--- a/drivers/dma/omap-dma.c
+++ b/drivers/dma/omap-dma.c
@@ -34,6 +34,7 @@
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 @@
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);