ARM: davinci/common: Convert edma driver to handle one eDMA instance per driver

Currently we have one device created to handle all (maximum 2) eDMAs in the
system.
With this change all eDMA instance will have it's own device/driver.
This change is needed for further cleanups in the eDMA driver stack since
the one device/driver to handle all eDMAs in the system was not flexible
enough and prevents the upcoming work.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

6 files changed, 234 insertions, 326 deletions

diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
index e9c4cb16a47e..7c2fe527e53b 100644
--- a/arch/arm/common/edma.c
+++ b/arch/arm/common/edma.c
@@ -235,6 +235,7 @@ static inline void clear_bits(int offset, int len, unsigned long *p)
 
 /* actual number of DMA channels and slots on this silicon */
 struct edma {
+	struct device	*dev;
 	/* how many dma resources of each type */
 	unsigned	num_channels;
 	unsigned	num_region;
@@ -246,6 +247,7 @@ struct edma {
 	const s8	*noevent;
 
 	struct edma_soc_info *info;
+	int		id;
 
 	/* The edma_inuse bit for each PaRAM slot is clear unless the
 	 * channel is in use ... by ARM or DSP, for QDMA, or whatever.
@@ -258,9 +260,6 @@ struct edma {
 	 */
 	DECLARE_BITMAP(edma_unused, EDMA_MAX_DMACH);
 
-	unsigned	irq_res_start;
-	unsigned	irq_res_end;
-
 	struct dma_interrupt_data {
 		void (*callback)(unsigned channel, unsigned short ch_status,
 				void *data);
@@ -349,17 +348,6 @@ setup_dma_interrupt(unsigned lch,
 	}
 }
 
-static int irq2ctlr(int irq)
-{
-	if (irq >= edma_cc[0]->irq_res_start && irq <= edma_cc[0]->irq_res_end)
-		return 0;
-	else if (irq >= edma_cc[1]->irq_res_start &&
-		irq <= edma_cc[1]->irq_res_end)
-		return 1;
-
-	return -1;
-}
-
 /******************************************************************************
  *
  * DMA interrupt handler
@@ -367,16 +355,17 @@ static int irq2ctlr(int irq)
  *****************************************************************************/
 static irqreturn_t dma_irq_handler(int irq, void *data)
 {
+	struct edma *cc = data;
 	int ctlr;
 	u32 sh_ier;
 	u32 sh_ipr;
 	u32 bank;
 
-	ctlr = irq2ctlr(irq);
+	ctlr = cc->id;
 	if (ctlr < 0)
 		return IRQ_NONE;
 
-	dev_dbg(data, "dma_irq_handler\n");
+	dev_dbg(cc->dev, "dma_irq_handler\n");
 
 	sh_ipr = edma_shadow0_read_array(ctlr, SH_IPR, 0);
 	if (!sh_ipr) {
@@ -394,7 +383,7 @@ static irqreturn_t dma_irq_handler(int irq, void *data)
 		u32 slot;
 		u32 channel;
 
-		dev_dbg(data, "IPR%d %08x\n", bank, sh_ipr);
+		dev_dbg(cc->dev, "IPR%d %08x\n", bank, sh_ipr);
 
 		slot = __ffs(sh_ipr);
 		sh_ipr &= ~(BIT(slot));
@@ -404,11 +393,11 @@ static irqreturn_t dma_irq_handler(int irq, void *data)
 			/* Clear the corresponding IPR bits */
 			edma_shadow0_write_array(ctlr, SH_ICR, bank,
 					BIT(slot));
-			if (edma_cc[ctlr]->intr_data[channel].callback)
-				edma_cc[ctlr]->intr_data[channel].callback(
+			if (cc->intr_data[channel].callback)
+				cc->intr_data[channel].callback(
 					EDMA_CTLR_CHAN(ctlr, channel),
 					EDMA_DMA_COMPLETE,
-					edma_cc[ctlr]->intr_data[channel].data);
+					cc->intr_data[channel].data);
 		}
 	} while (sh_ipr);
 
@@ -423,15 +412,16 @@ static irqreturn_t dma_irq_handler(int irq, void *data)
  *****************************************************************************/
 static irqreturn_t dma_ccerr_handler(int irq, void *data)
 {
+	struct edma *cc = data;
 	int i;
 	int ctlr;
 	unsigned int cnt = 0;
 
-	ctlr = irq2ctlr(irq);
+	ctlr = cc->id;
 	if (ctlr < 0)
 		return IRQ_NONE;
 
-	dev_dbg(data, "dma_ccerr_handler\n");
+	dev_dbg(cc->dev, "dma_ccerr_handler\n");
 
 	if ((edma_read_array(ctlr, EDMA_EMR, 0) == 0) &&
 	    (edma_read_array(ctlr, EDMA_EMR, 1) == 0) &&
@@ -446,8 +436,8 @@ static irqreturn_t dma_ccerr_handler(int irq, void *data)
 		else if (edma_read_array(ctlr, EDMA_EMR, 1))
 			j = 1;
 		if (j >= 0) {
-			dev_dbg(data, "EMR%d %08x\n", j,
-					edma_read_array(ctlr, EDMA_EMR, j));
+			dev_dbg(cc->dev, "EMR%d %08x\n", j,
+				edma_read_array(ctlr, EDMA_EMR, j));
 			for (i = 0; i < 32; i++) {
 				int k = (j << 5) + i;
 				if (edma_read_array(ctlr, EDMA_EMR, j) &
@@ -458,19 +448,16 @@ static irqreturn_t dma_ccerr_handler(int irq, void *data)
 					/* Clear any SER */
 					edma_shadow0_write_array(ctlr, SH_SECR,
 								j, BIT(i));
-					if (edma_cc[ctlr]->intr_data[k].
-								callback) {
-						edma_cc[ctlr]->intr_data[k].
-						callback(
-						EDMA_CTLR_CHAN(ctlr, k),
-						EDMA_DMA_CC_ERROR,
-						edma_cc[ctlr]->intr_data
-						[k].data);
+					if (cc->intr_data[k].callback) {
+						cc->intr_data[k].callback(
+							EDMA_CTLR_CHAN(ctlr, k),
+							EDMA_DMA_CC_ERROR,
+							cc->intr_data[k].data);
 					}
 				}
 			}
 		} else if (edma_read(ctlr, EDMA_QEMR)) {
-			dev_dbg(data, "QEMR %02x\n",
+			dev_dbg(cc->dev, "QEMR %02x\n",
 				edma_read(ctlr, EDMA_QEMR));
 			for (i = 0; i < 8; i++) {
 				if (edma_read(ctlr, EDMA_QEMR) & BIT(i)) {
@@ -483,7 +470,7 @@ static irqreturn_t dma_ccerr_handler(int irq, void *data)
 				}
 			}
 		} else if (edma_read(ctlr, EDMA_CCERR)) {
-			dev_dbg(data, "CCERR %08x\n",
+			dev_dbg(cc->dev, "CCERR %08x\n",
 				edma_read(ctlr, EDMA_CCERR));
 			/* FIXME:  CCERR.BIT(16) ignored!  much better
 			 * to just write CCERRCLR with CCERR value...
@@ -1239,21 +1226,19 @@ static struct edma_soc_info *edma_setup_info_from_dt(struct device *dev,
 
 static int edma_probe(struct platform_device *pdev)
 {
-	struct edma_soc_info	**info = pdev->dev.platform_data;
-	struct edma_soc_info    *ninfo[EDMA_MAX_CC] = {NULL};
+	struct edma_soc_info	*info = pdev->dev.platform_data;
 	s8		(*queue_priority_mapping)[2];
-	int			i, j, off, ln, found = 0;
-	int			status = -1;
+	int			i, off, ln;
 	const s16		(*rsv_chans)[2];
 	const s16		(*rsv_slots)[2];
 	const s16		(*xbar_chans)[2];
-	int			irq[EDMA_MAX_CC] = {0, 0};
-	int			err_irq[EDMA_MAX_CC] = {0, 0};
-	struct resource		*r[EDMA_MAX_CC] = {NULL};
-	struct resource		res[EDMA_MAX_CC];
-	char			res_name[10];
+	int			irq;
+	char			*irq_name;
+	struct resource		*mem;
 	struct device_node	*node = pdev->dev.of_node;
 	struct device		*dev = &pdev->dev;
+	int			dev_id = pdev->id;
+	struct edma		*cc;
 	int			ret;
 	struct platform_device_info edma_dev_info = {
 		.name = "edma-dma-engine",
@@ -1261,6 +1246,17 @@ 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) {
@@ -1268,13 +1264,11 @@ static int edma_probe(struct platform_device *pdev)
 			return -ENODEV;
 		}
 
-		ninfo[0] = edma_setup_info_from_dt(dev, node);
-		if (IS_ERR(ninfo[0])) {
+		info = edma_setup_info_from_dt(dev, node);
+		if (IS_ERR(info)) {
 			dev_err(dev, "failed to get DT data\n");
-			return PTR_ERR(ninfo[0]);
+			return PTR_ERR(info);
 		}
-
-		info = ninfo;
 	}
 
 	if (!info)
@@ -1287,154 +1281,132 @@ static int edma_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	for (j = 0; j < EDMA_MAX_CC; j++) {
-		if (!info[j]) {
-			if (!found)
-				return -ENODEV;
-			break;
-		}
-		if (node) {
-			ret = of_address_to_resource(node, j, &res[j]);
-			if (!ret)
-				r[j] = &res[j];
-		} else {
-			sprintf(res_name, "edma_cc%d", j);
-			r[j] = platform_get_resource_byname(pdev,
-						IORESOURCE_MEM,
-						res_name);
-		}
-		if (!r[j]) {
-			if (found)
-				break;
-			else
-				return -ENODEV;
-		} else {
-			found = 1;
+	mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "edma3_cc");
+	if (!mem) {
+		dev_dbg(dev, "mem resource not found, using index 0\n");
+		mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		if (!mem) {
+			dev_err(dev, "no mem resource?\n");
+			return -ENODEV;
 		}
+	}
 
-		edmacc_regs_base[j] = devm_ioremap_resource(&pdev->dev, r[j]);
-		if (IS_ERR(edmacc_regs_base[j]))
-			return PTR_ERR(edmacc_regs_base[j]);
+	edmacc_regs_base[dev_id] = devm_ioremap_resource(dev, mem);
+	if (IS_ERR(edmacc_regs_base[dev_id]))
+		return PTR_ERR(edmacc_regs_base[dev_id]);
 
-		edma_cc[j] = devm_kzalloc(&pdev->dev, sizeof(struct edma),
-					  GFP_KERNEL);
-		if (!edma_cc[j])
-			return -ENOMEM;
+	edma_cc[dev_id] = devm_kzalloc(dev, sizeof(struct edma), GFP_KERNEL);
+	if (!edma_cc[dev_id])
+		return -ENOMEM;
 
-		/* Get eDMA3 configuration from IP */
-		ret = edma_setup_from_hw(dev, info[j], edma_cc[j], j);
-		if (ret)
-			return ret;
+	cc = edma_cc[dev_id];
+	cc->dev = dev;
+	cc->id = dev_id;
+	dev_set_drvdata(dev, cc);
 
-		edma_cc[j]->default_queue = info[j]->default_queue;
+	/* Get eDMA3 configuration from IP */
+	ret = edma_setup_from_hw(dev, info, cc, dev_id);
+	if (ret)
+		return ret;
 
-		dev_dbg(&pdev->dev, "DMA REG BASE ADDR=%p\n",
-			edmacc_regs_base[j]);
+	cc->default_queue = info->default_queue;
 
-		for (i = 0; i < edma_cc[j]->num_slots; i++)
-			memcpy_toio(edmacc_regs_base[j] + PARM_OFFSET(i),
-					&dummy_paramset, PARM_SIZE);
+	dev_dbg(dev, "DMA REG BASE ADDR=%p\n", edmacc_regs_base[dev_id]);
 
-		/* Mark all channels as unused */
-		memset(edma_cc[j]->edma_unused, 0xff,
-			sizeof(edma_cc[j]->edma_unused));
+	for (i = 0; i < cc->num_slots; i++)
+		memcpy_toio(edmacc_regs_base[dev_id] + PARM_OFFSET(i),
+			    &dummy_paramset, PARM_SIZE);
 
-		if (info[j]->rsv) {
+	/* Mark all channels as unused */
+	memset(cc->edma_unused, 0xff, sizeof(cc->edma_unused));
 
-			/* Clear the reserved channels in unused list */
-			rsv_chans = info[j]->rsv->rsv_chans;
-			if (rsv_chans) {
-				for (i = 0; rsv_chans[i][0] != -1; i++) {
-					off = rsv_chans[i][0];
-					ln = rsv_chans[i][1];
-					clear_bits(off, ln,
-						  edma_cc[j]->edma_unused);
-				}
-			}
+	if (info->rsv) {
 
-			/* Set the reserved slots in inuse list */
-			rsv_slots = info[j]->rsv->rsv_slots;
-			if (rsv_slots) {
-				for (i = 0; rsv_slots[i][0] != -1; i++) {
-					off = rsv_slots[i][0];
-					ln = rsv_slots[i][1];
-					set_bits(off, ln,
-						edma_cc[j]->edma_inuse);
-				}
+		/* Clear the reserved channels in unused list */
+		rsv_chans = info->rsv->rsv_chans;
+		if (rsv_chans) {
+			for (i = 0; rsv_chans[i][0] != -1; i++) {
+				off = rsv_chans[i][0];
+				ln = rsv_chans[i][1];
+				clear_bits(off, ln, cc->edma_unused);
 			}
 		}
 
-		/* Clear the xbar mapped channels in unused list */
-		xbar_chans = info[j]->xbar_chans;
-		if (xbar_chans) {
-			for (i = 0; xbar_chans[i][1] != -1; i++) {
-				off = xbar_chans[i][1];
-				clear_bits(off, 1,
-					   edma_cc[j]->edma_unused);
+		/* Set the reserved slots in inuse list */
+		rsv_slots = info->rsv->rsv_slots;
+		if (rsv_slots) {
+			for (i = 0; rsv_slots[i][0] != -1; i++) {
+				off = rsv_slots[i][0];
+				ln = rsv_slots[i][1];
+				set_bits(off, ln, cc->edma_inuse);
 			}
 		}
+	}
 
-		if (node) {
-			irq[j] = irq_of_parse_and_map(node, 0);
-			err_irq[j] = irq_of_parse_and_map(node, 2);
-		} else {
-			char irq_name[10];
-
-			sprintf(irq_name, "edma%d", j);
-			irq[j] = platform_get_irq_byname(pdev, irq_name);
-
-			sprintf(irq_name, "edma%d_err", j);
-			err_irq[j] = platform_get_irq_byname(pdev, irq_name);
-		}
-		edma_cc[j]->irq_res_start = irq[j];
-		edma_cc[j]->irq_res_end = err_irq[j];
-
-		status = devm_request_irq(dev, irq[j], dma_irq_handler, 0,
-					  "edma", dev);
-		if (status < 0) {
-			dev_dbg(&pdev->dev,
-				"devm_request_irq %d failed --> %d\n",
-				irq[j], status);
-			return status;
+	/* Clear the xbar mapped channels in unused list */
+	xbar_chans = info->xbar_chans;
+	if (xbar_chans) {
+		for (i = 0; xbar_chans[i][1] != -1; i++) {
+			off = xbar_chans[i][1];
+			clear_bits(off, 1, cc->edma_unused);
 		}
+	}
 
-		status = devm_request_irq(dev, err_irq[j], dma_ccerr_handler, 0,
-					  "edma_error", dev);
-		if (status < 0) {
-			dev_dbg(&pdev->dev,
-				"devm_request_irq %d failed --> %d\n",
-				err_irq[j], status);
-			return status;
+	irq = platform_get_irq_byname(pdev, "edma3_ccint");
+	if (irq < 0 && node)
+		irq = irq_of_parse_and_map(node, 0);
+
+	if (irq >= 0) {
+		irq_name = devm_kasprintf(dev, GFP_KERNEL, "%s_ccint",
+					  dev_name(dev));
+		ret = devm_request_irq(dev, irq, dma_irq_handler, 0, irq_name,
+				       cc);
+		if (ret) {
+			dev_err(dev, "CCINT (%d) failed --> %d\n", irq, ret);
+			return ret;
 		}
+	}
 
-		for (i = 0; i < edma_cc[j]->num_channels; i++)
-			map_dmach_queue(j, i, info[j]->default_queue);
+	irq = platform_get_irq_byname(pdev, "edma3_ccerrint");
+	if (irq < 0 && node)
+		irq = irq_of_parse_and_map(node, 2);
+
+	if (irq >= 0) {
+		irq_name = devm_kasprintf(dev, GFP_KERNEL, "%s_ccerrint",
+					  dev_name(dev));
+		ret = devm_request_irq(dev, irq, dma_ccerr_handler, 0, irq_name,
+				       cc);
+		if (ret) {
+			dev_err(dev, "CCERRINT (%d) failed --> %d\n", irq, ret);
+			return ret;
+		}
+	}
 
-		queue_priority_mapping = info[j]->queue_priority_mapping;
+	for (i = 0; i < cc->num_channels; i++)
+		map_dmach_queue(dev_id, i, info->default_queue);
 
-		/* Event queue priority mapping */
-		for (i = 0; queue_priority_mapping[i][0] != -1; i++)
-			assign_priority_to_queue(j,
-						queue_priority_mapping[i][0],
-						queue_priority_mapping[i][1]);
+	queue_priority_mapping = info->queue_priority_mapping;
 
-		/* Map the channel to param entry if channel mapping logic
-		 * exist
-		 */
-		if (edma_read(j, EDMA_CCCFG) & CHMAP_EXIST)
-			map_dmach_param(j);
+	/* Event queue priority mapping */
+	for (i = 0; queue_priority_mapping[i][0] != -1; i++)
+		assign_priority_to_queue(dev_id, queue_priority_mapping[i][0],
+					 queue_priority_mapping[i][1]);
 
-		for (i = 0; i < edma_cc[j]->num_region; i++) {
-			edma_write_array2(j, EDMA_DRAE, i, 0, 0x0);
-			edma_write_array2(j, EDMA_DRAE, i, 1, 0x0);
-			edma_write_array(j, EDMA_QRAE, i, 0x0);
-		}
-		edma_cc[j]->info = info[j];
-		arch_num_cc++;
+	/* Map the channel to param entry if channel mapping logic exist */
+	if (edma_read(dev_id, EDMA_CCCFG) & CHMAP_EXIST)
+		map_dmach_param(dev_id);
 
-		edma_dev_info.id = j;
-		platform_device_register_full(&edma_dev_info);
+	for (i = 0; i < cc->num_region; i++) {
+		edma_write_array2(dev_id, EDMA_DRAE, i, 0, 0x0);
+		edma_write_array2(dev_id, EDMA_DRAE, i, 1, 0x0);
+		edma_write_array(dev_id, EDMA_QRAE, i, 0x0);
 	}
+	cc->info = info;
+	arch_num_cc++;
+
+	edma_dev_info.id = dev_id;
+
+	platform_device_register_full(&edma_dev_info);
 
 	return 0;
 }
@@ -1442,38 +1414,30 @@ static int edma_probe(struct platform_device *pdev)
 #ifdef CONFIG_PM_SLEEP
 static int edma_pm_resume(struct device *dev)
 {
-	int i, j;
+	struct edma *cc = dev_get_drvdata(dev);
+	int i;
+	s8 (*queue_priority_mapping)[2];
 
-	for (j = 0; j < arch_num_cc; j++) {
-		struct edma *cc = edma_cc[j];
+	queue_priority_mapping = cc->info->queue_priority_mapping;
 
-		s8 (*queue_priority_mapping)[2];
+	/* Event queue priority mapping */
+	for (i = 0; queue_priority_mapping[i][0] != -1; i++)
+		assign_priority_to_queue(cc->id, queue_priority_mapping[i][0],
+					 queue_priority_mapping[i][1]);
 
-		queue_priority_mapping = cc->info->queue_priority_mapping;
+	/* Map the channel to param entry if channel mapping logic */
+	if (edma_read(cc->id, EDMA_CCCFG) & CHMAP_EXIST)
+		map_dmach_param(cc->id);
 
-		/* Event queue priority mapping */
-		for (i = 0; queue_priority_mapping[i][0] != -1; i++)
-			assign_priority_to_queue(j,
-						 queue_priority_mapping[i][0],
-						 queue_priority_mapping[i][1]);
+	for (i = 0; i < cc->num_channels; i++) {
+		if (test_bit(i, cc->edma_inuse)) {
+			/* ensure access through shadow region 0 */
+			edma_or_array2(cc->id, EDMA_DRAE, 0, i >> 5,
+				       BIT(i & 0x1f));
 
-		/*
-		 * Map the channel to param entry if channel mapping logic
-		 * exist
-		 */
-		if (edma_read(j, EDMA_CCCFG) & CHMAP_EXIST)
-			map_dmach_param(j);
-
-		for (i = 0; i < cc->num_channels; i++) {
-			if (test_bit(i, cc->edma_inuse)) {
-				/* ensure access through shadow region 0 */
-				edma_or_array2(j, EDMA_DRAE, 0, i >> 5,
-					       BIT(i & 0x1f));
-
-				setup_dma_interrupt(i,
-						    cc->intr_data[i].callback,
-						    cc->intr_data[i].data);
-			}
+			setup_dma_interrupt(EDMA_CTLR_CHAN(cc->id, i),
+					    cc->intr_data[i].callback,
+					    cc->intr_data[i].data);
 		}
 	}
 
diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index 29e08aac8294..9ae049ae816a 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -147,150 +147,114 @@ static s8 da850_queue_priority_mapping[][2] = {
 	{-1, -1}
 };
 
-static struct edma_soc_info da830_edma_cc0_info = {
+static struct edma_soc_info da8xx_edma0_pdata = {
 	.queue_priority_mapping	= da8xx_queue_priority_mapping,
 	.default_queue		= EVENTQ_1,
 };
 
-static struct edma_soc_info *da830_edma_info[EDMA_MAX_CC] = {
-	&da830_edma_cc0_info,
+static struct edma_soc_info da850_edma1_pdata = {
+	.queue_priority_mapping	= da850_queue_priority_mapping,
+	.default_queue		= EVENTQ_0,
 };
 
-static struct edma_soc_info da850_edma_cc_info[] = {
+static struct resource da8xx_edma0_resources[] = {
 	{
-		.queue_priority_mapping	= da8xx_queue_priority_mapping,
-		.default_queue		= EVENTQ_1,
-	},
-	{
-		.queue_priority_mapping	= da850_queue_priority_mapping,
-		.default_queue		= EVENTQ_0,
-	},
-};
-
-static struct edma_soc_info *da850_edma_info[EDMA_MAX_CC] = {
-	&da850_edma_cc_info[0],
-	&da850_edma_cc_info[1],
-};
-
-static struct resource da830_edma_resources[] = {
-	{
-		.name	= "edma_cc0",
+		.name	= "edma3_cc",
 		.start	= DA8XX_TPCC_BASE,
 		.end	= DA8XX_TPCC_BASE + SZ_32K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc0",
+		.name	= "edma3_tc0",
 		.start	= DA8XX_TPTC0_BASE,
 		.end	= DA8XX_TPTC0_BASE + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc1",
+		.name	= "edma3_tc1",
 		.start	= DA8XX_TPTC1_BASE,
 		.end	= DA8XX_TPTC1_BASE + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma0",
+		.name	= "edma3_ccint",
 		.start	= IRQ_DA8XX_CCINT0,
 		.flags	= IORESOURCE_IRQ,
 	},
 	{
-		.name	= "edma0_err",
+		.name	= "edma3_ccerrint",
 		.start	= IRQ_DA8XX_CCERRINT,
 		.flags	= IORESOURCE_IRQ,
 	},
 };
 
-static struct resource da850_edma_resources[] = {
-	{
-		.name	= "edma_cc0",
-		.start	= DA8XX_TPCC_BASE,
-		.end	= DA8XX_TPCC_BASE + SZ_32K - 1,
-		.flags	= IORESOURCE_MEM,
-	},
-	{
-		.name	= "edma_tc0",
-		.start	= DA8XX_TPTC0_BASE,
-		.end	= DA8XX_TPTC0_BASE + SZ_1K - 1,
-		.flags	= IORESOURCE_MEM,
-	},
+static struct resource da850_edma1_resources[] = {
 	{
-		.name	= "edma_tc1",
-		.start	= DA8XX_TPTC1_BASE,
-		.end	= DA8XX_TPTC1_BASE + SZ_1K - 1,
-		.flags	= IORESOURCE_MEM,
-	},
-	{
-		.name	= "edma_cc1",
+		.name	= "edma3_cc",
 		.start	= DA850_TPCC1_BASE,
 		.end	= DA850_TPCC1_BASE + SZ_32K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc2",
+		.name	= "edma3_tc0",
 		.start	= DA850_TPTC2_BASE,
 		.end	= DA850_TPTC2_BASE + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma0",
-		.start	= IRQ_DA8XX_CCINT0,
-		.flags	= IORESOURCE_IRQ,
-	},
-	{
-		.name	= "edma0_err",
-		.start	= IRQ_DA8XX_CCERRINT,
-		.flags	= IORESOURCE_IRQ,
-	},
-	{
-		.name	= "edma1",
+		.name	= "edma3_ccint",
 		.start	= IRQ_DA850_CCINT1,
 		.flags	= IORESOURCE_IRQ,
 	},
 	{
-		.name	= "edma1_err",
+		.name	= "edma3_ccerrint",
 		.start	= IRQ_DA850_CCERRINT1,
 		.flags	= IORESOURCE_IRQ,
 	},
 };
 
-static struct platform_device da830_edma_device = {
+static struct platform_device da8xx_edma0_device = {
 	.name		= "edma",
-	.id		= -1,
+	.id		= 0,
 	.dev = {
-		.platform_data = da830_edma_info,
+		.platform_data = &da8xx_edma0_pdata,
 	},
-	.num_resources	= ARRAY_SIZE(da830_edma_resources),
-	.resource	= da830_edma_resources,
+	.num_resources	= ARRAY_SIZE(da8xx_edma0_resources),
+	.resource	= da8xx_edma0_resources,
 };
 
-static struct platform_device da850_edma_device = {
+static struct platform_device da850_edma1_device = {
 	.name		= "edma",
-	.id		= -1,
+	.id		= 1,
 	.dev = {
-		.platform_data = da850_edma_info,
+		.platform_data = &da850_edma1_pdata,
 	},
-	.num_resources	= ARRAY_SIZE(da850_edma_resources),
-	.resource	= da850_edma_resources,
+	.num_resources	= ARRAY_SIZE(da850_edma1_resources),
+	.resource	= da850_edma1_resources,
 };
 
 int __init da830_register_edma(struct edma_rsv_info *rsv)
 {
-	da830_edma_cc0_info.rsv = rsv;
+	da8xx_edma0_pdata.rsv = rsv;
 
-	return platform_device_register(&da830_edma_device);
+	return platform_device_register(&da8xx_edma0_device);
 }
 
 int __init da850_register_edma(struct edma_rsv_info *rsv[2])
 {
+	int ret;
+
 	if (rsv) {
-		da850_edma_cc_info[0].rsv = rsv[0];
-		da850_edma_cc_info[1].rsv = rsv[1];
+		da8xx_edma0_pdata.rsv = rsv[0];
+		da850_edma1_pdata.rsv = rsv[1];
 	}
 
-	return platform_device_register(&da850_edma_device);
+	ret = platform_device_register(&da8xx_edma0_device);
+	if (ret) {
+		pr_warn("%s: Failed to register eDMA0\n", __func__);
+		return ret;
+	}
+	return platform_device_register(&da850_edma1_device);
 }
 
 static struct resource da8xx_i2c_resources0[] = {
diff --git a/arch/arm/mach-davinci/dm355.c b/arch/arm/mach-davinci/dm355.c
index 567dc56fe8cd..a50bb9c66952 100644
--- a/arch/arm/mach-davinci/dm355.c
+++ b/arch/arm/mach-davinci/dm355.c
@@ -569,49 +569,44 @@ static u8 dm355_default_priorities[DAVINCI_N_AINTC_IRQ] = {
 
 /*----------------------------------------------------------------------*/
 
-static s8
-queue_priority_mapping[][2] = {
+static s8 queue_priority_mapping[][2] = {
 	/* {event queue no, Priority} */
 	{0, 3},
 	{1, 7},
 	{-1, -1},
 };
 
-static struct edma_soc_info edma_cc0_info = {
+static struct edma_soc_info dm355_edma_pdata = {
 	.queue_priority_mapping	= queue_priority_mapping,
 	.default_queue		= EVENTQ_1,
 };
 
-static struct edma_soc_info *dm355_edma_info[EDMA_MAX_CC] = {
-       &edma_cc0_info,
-};
-
 static struct resource edma_resources[] = {
 	{
-		.name	= "edma_cc0",
+		.name	= "edma3_cc",
 		.start	= 0x01c00000,
 		.end	= 0x01c00000 + SZ_64K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc0",
+		.name	= "edma3_tc0",
 		.start	= 0x01c10000,
 		.end	= 0x01c10000 + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc1",
+		.name	= "edma3_tc1",
 		.start	= 0x01c10400,
 		.end	= 0x01c10400 + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma0",
+		.name	= "edma3_ccint",
 		.start	= IRQ_CCINT0,
 		.flags	= IORESOURCE_IRQ,
 	},
 	{
-		.name	= "edma0_err",
+		.name	= "edma3_ccerrint",
 		.start	= IRQ_CCERRINT,
 		.flags	= IORESOURCE_IRQ,
 	},
@@ -621,7 +616,7 @@ static struct resource edma_resources[] = {
 static struct platform_device dm355_edma_device = {
 	.name			= "edma",
 	.id			= 0,
-	.dev.platform_data	= dm355_edma_info,
+	.dev.platform_data	= &dm355_edma_pdata,
 	.num_resources		= ARRAY_SIZE(edma_resources),
 	.resource		= edma_resources,
 };
diff --git a/arch/arm/mach-davinci/dm365.c b/arch/arm/mach-davinci/dm365.c
index 6a890a8486d0..2068cbeaeb03 100644
--- a/arch/arm/mach-davinci/dm365.c
+++ b/arch/arm/mach-davinci/dm365.c
@@ -853,8 +853,7 @@ static u8 dm365_default_priorities[DAVINCI_N_AINTC_IRQ] = {
 };
 
 /* Four Transfer Controllers on DM365 */
-static s8
-dm365_queue_priority_mapping[][2] = {
+static s8 dm365_queue_priority_mapping[][2] = {
 	/* {event queue no, Priority} */
 	{0, 7},
 	{1, 7},
@@ -863,53 +862,49 @@ dm365_queue_priority_mapping[][2] = {
 	{-1, -1},
 };
 
-static struct edma_soc_info edma_cc0_info = {
+static struct edma_soc_info dm365_edma_pdata = {
 	.queue_priority_mapping	= dm365_queue_priority_mapping,
 	.default_queue		= EVENTQ_3,
 };
 
-static struct edma_soc_info *dm365_edma_info[EDMA_MAX_CC] = {
-	&edma_cc0_info,
-};
-
 static struct resource edma_resources[] = {
 	{
-		.name	= "edma_cc0",
+		.name	= "edma3_cc",
 		.start	= 0x01c00000,
 		.end	= 0x01c00000 + SZ_64K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc0",
+		.name	= "edma3_tc0",
 		.start	= 0x01c10000,
 		.end	= 0x01c10000 + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc1",
+		.name	= "edma3_tc1",
 		.start	= 0x01c10400,
 		.end	= 0x01c10400 + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc2",
+		.name	= "edma3_tc2",
 		.start	= 0x01c10800,
 		.end	= 0x01c10800 + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc3",
+		.name	= "edma3_tc3",
 		.start	= 0x01c10c00,
 		.end	= 0x01c10c00 + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma0",
+		.name	= "edma3_ccint",
 		.start	= IRQ_CCINT0,
 		.flags	= IORESOURCE_IRQ,
 	},
 	{
-		.name	= "edma0_err",
+		.name	= "edma3_ccerrint",
 		.start	= IRQ_CCERRINT,
 		.flags	= IORESOURCE_IRQ,
 	},
@@ -919,7 +914,7 @@ static struct resource edma_resources[] = {
 static struct platform_device dm365_edma_device = {
 	.name			= "edma",
 	.id			= 0,
-	.dev.platform_data	= dm365_edma_info,
+	.dev.platform_data	= &dm365_edma_pdata,
 	.num_resources		= ARRAY_SIZE(edma_resources),
 	.resource		= edma_resources,
 };
diff --git a/arch/arm/mach-davinci/dm644x.c b/arch/arm/mach-davinci/dm644x.c
index dc52657909c4..d759ca8e58e8 100644
--- a/arch/arm/mach-davinci/dm644x.c
+++ b/arch/arm/mach-davinci/dm644x.c
@@ -498,49 +498,44 @@ static u8 dm644x_default_priorities[DAVINCI_N_AINTC_IRQ] = {
 
 /*----------------------------------------------------------------------*/
 
-static s8
-queue_priority_mapping[][2] = {
+static s8 queue_priority_mapping[][2] = {
 	/* {event queue no, Priority} */
 	{0, 3},
 	{1, 7},
 	{-1, -1},
 };
 
-static struct edma_soc_info edma_cc0_info = {
+static struct edma_soc_info dm644x_edma_pdata = {
 	.queue_priority_mapping	= queue_priority_mapping,
 	.default_queue		= EVENTQ_1,
 };
 
-static struct edma_soc_info *dm644x_edma_info[EDMA_MAX_CC] = {
-	&edma_cc0_info,
-};
-
 static struct resource edma_resources[] = {
 	{
-		.name	= "edma_cc0",
+		.name	= "edma3_cc",
 		.start	= 0x01c00000,
 		.end	= 0x01c00000 + SZ_64K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc0",
+		.name	= "edma3_tc0",
 		.start	= 0x01c10000,
 		.end	= 0x01c10000 + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc1",
+		.name	= "edma3_tc1",
 		.start	= 0x01c10400,
 		.end	= 0x01c10400 + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma0",
+		.name	= "edma3_ccint",
 		.start	= IRQ_CCINT0,
 		.flags	= IORESOURCE_IRQ,
 	},
 	{
-		.name	= "edma0_err",
+		.name	= "edma3_ccerrint",
 		.start	= IRQ_CCERRINT,
 		.flags	= IORESOURCE_IRQ,
 	},
@@ -550,7 +545,7 @@ static struct resource edma_resources[] = {
 static struct platform_device dm644x_edma_device = {
 	.name			= "edma",
 	.id			= 0,
-	.dev.platform_data	= dm644x_edma_info,
+	.dev.platform_data	= &dm644x_edma_pdata,
 	.num_resources		= ARRAY_SIZE(edma_resources),
 	.resource		= edma_resources,
 };
diff --git a/arch/arm/mach-davinci/dm646x.c b/arch/arm/mach-davinci/dm646x.c
index 3f842bb266d6..219ebc8f674a 100644
--- a/arch/arm/mach-davinci/dm646x.c
+++ b/arch/arm/mach-davinci/dm646x.c
@@ -531,8 +531,7 @@ static u8 dm646x_default_priorities[DAVINCI_N_AINTC_IRQ] = {
 /*----------------------------------------------------------------------*/
 
 /* Four Transfer Controllers on DM646x */
-static s8
-dm646x_queue_priority_mapping[][2] = {
+static s8 dm646x_queue_priority_mapping[][2] = {
 	/* {event queue no, Priority} */
 	{0, 4},
 	{1, 0},
@@ -541,53 +540,49 @@ dm646x_queue_priority_mapping[][2] = {
 	{-1, -1},
 };
 
-static struct edma_soc_info edma_cc0_info = {
+static struct edma_soc_info dm646x_edma_pdata = {
 	.queue_priority_mapping	= dm646x_queue_priority_mapping,
 	.default_queue		= EVENTQ_1,
 };
 
-static struct edma_soc_info *dm646x_edma_info[EDMA_MAX_CC] = {
-	&edma_cc0_info,
-};
-
 static struct resource edma_resources[] = {
 	{
-		.name	= "edma_cc0",
+		.name	= "edma3_cc",
 		.start	= 0x01c00000,
 		.end	= 0x01c00000 + SZ_64K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc0",
+		.name	= "edma3_tc0",
 		.start	= 0x01c10000,
 		.end	= 0x01c10000 + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc1",
+		.name	= "edma3_tc1",
 		.start	= 0x01c10400,
 		.end	= 0x01c10400 + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc2",
+		.name	= "edma3_tc2",
 		.start	= 0x01c10800,
 		.end	= 0x01c10800 + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma_tc3",
+		.name	= "edma3_tc3",
 		.start	= 0x01c10c00,
 		.end	= 0x01c10c00 + SZ_1K - 1,
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.name	= "edma0",
+		.name	= "edma3_ccint",
 		.start	= IRQ_CCINT0,
 		.flags	= IORESOURCE_IRQ,
 	},
 	{
-		.name	= "edma0_err",
+		.name	= "edma3_ccerrint",
 		.start	= IRQ_CCERRINT,
 		.flags	= IORESOURCE_IRQ,
 	},
@@ -597,7 +592,7 @@ static struct resource edma_resources[] = {
 static struct platform_device dm646x_edma_device = {
 	.name			= "edma",
 	.id			= 0,
-	.dev.platform_data	= dm646x_edma_info,
+	.dev.platform_data	= &dm646x_edma_pdata,
 	.num_resources		= ARRAY_SIZE(edma_resources),
 	.resource		= edma_resources,
 };
@@ -936,7 +931,7 @@ void dm646x_setup_vpif(struct vpif_display_config *display_config,
 
 int __init dm646x_init_edma(struct edma_rsv_info *rsv)
 {
-	edma_cc0_info.rsv = rsv;
+	dm646x_edma_pdata.rsv = rsv;
 
 	return platform_device_register(&dm646x_edma_device);
 }