Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1246597

[PATCH v5 08/24] ARM/dmaengine: edma: Remove limitation on the number of eDMA controllers

Show all headers | View raw

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>
---
 arch/arm/common/edma.c | 22 +++++-----------------
 drivers/dma/edma.c     | 17 ++++++++---------
 2 files changed, 13 insertions(+), 26 deletions(-)

diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
index 03692520812a..5b747f1bc8b5 100644
--- a/arch/arm/common/edma.c
+++ b/arch/arm/common/edma.c
@@ -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);
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index 53d48b2a700d..fc91ab9dd1bb 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -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");
-- 
2.6.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH v5 00/24] dmaengine/ARM: Merge the edma drivers into one Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-14 13:50 +0200
  [PATCH v5 22/24] dmaengine: edma: Read channel mapping support only once from HW Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-14 13:50 +0200
  [PATCH v5 19/24] dmaengine: edma: Simplify the interrupt handling Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-14 13:50 +0200
  [PATCH v5 05/24] ARM/dmaengine: edma: Move of_dma_controller_register to the dmaengine driver Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-14 13:50 +0200
  [PATCH v5 15/24] dmaengine: edma: Use dev_dbg instead pr_debug Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-14 13:50 +0200
  [PATCH v5 21/24] dmaengine: edma: Simplify and optimize ccerr interrupt handler Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-14 13:50 +0200
  [PATCH v5 13/24] dmaengine: edma: Use devm_kcalloc when possible Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-14 13:50 +0200
  [PATCH v5 24/24] dmaengine: edma: Dynamic paRAM slot handling if HW supports it Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-14 13:50 +0200
  [PATCH v5 10/24] ARM: davinci: Add dma_mask to eDMA devices Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-14 14:00 +0200
  [PATCH v5 08/24] ARM/dmaengine: edma: Remove limitation on the number of eDMA controllers Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-14 14:00 +0200
  [PATCH v5 07/24] ARM/dmaengine: edma: Public API to use private struct pointer Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-14 14:00 +0200
  [PATCH v5 02/24] ARM: common: edma: Remove unused functions Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-14 14:00 +0200
  [PATCH v5 12/24] dmaengine: edma: Allocate memory dynamically for bitmaps and structures Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-14 14:00 +0200
  Re: [PATCH v5 00/24] dmaengine/ARM: Merge the edma drivers into one Vinod Koul <vinod.koul@intel.com> - 2015-10-14 16:30 +0200
    Re: [PATCH v5 00/24] dmaengine/ARM: Merge the edma drivers into one Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-10-15 09:20 +0200

csiph-web