dmaengine: omap-dma: Take DMA request number from DT if it is available (de506089) · Commits · 戴 / test

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>

drivers/dma/omap-dma.c

+11 −1

Original line number	Diff line number	Diff line
		@@ -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);

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