linux-kernel - [RFC PATCH 1/9] drivers: dma: omap-dma: Avoid hard-coding of the dma-request channels

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Message-ID: <1394194576-23741-2-git-send-email-r.sricharan@ti.com>
Date:	Fri, 7 Mar 2014 17:46:08 +0530
From:	Sricharan R <r.sricharan@...com>
To:	<r.sricharan@...com>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-omap@...r.kernel.org>, <dmaengine@...r.kernel.org>
CC:	<santosh.shilimkar@...com>, <rnayak@...com>, <nsekhar@...com>,
	<tony@...mide.com>, <linux@....linux.org.uk>,
	<vinod.koul@...el.com>, <dan.j.williams@...el.com>, <nm@...com>
Subject: [RFC PATCH 1/9] drivers: dma: omap-dma: Avoid hard-coding of the dma-request channels

The total number of dma-request channels is hard-coded. Instead read the
data from DT.

Signed-off-by: Sricharan R <r.sricharan@...com>
---
 drivers/dma/omap-dma.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c
index 64ceca2..a0d6639 100644
--- a/drivers/dma/omap-dma.c
+++ b/drivers/dma/omap-dma.c
@@ -1093,6 +1093,7 @@ static int omap_dma_probe(struct platform_device *pdev)
 	struct omap_dmadev *od;
 	struct resource *res;
 	int rc, i, irq;
+	u32 reqs;
 
 	od = devm_kzalloc(&pdev->dev, sizeof(*od), GFP_KERNEL);
 	if (!od)
@@ -1126,7 +1127,9 @@ static int omap_dma_probe(struct platform_device *pdev)
 
 	tasklet_init(&od->task, omap_dma_sched, (unsigned long)od);
 
-	for (i = 0; i < 127; i++) {
+	of_property_read_u32(pdev->dev.of_node, "#dma-requests", &reqs);
+
+	for (i = 0; i < reqs; i++) {
 		rc = omap_dma_chan_init(od, i);
 		if (rc) {
 			omap_dma_free(od);
-- 
1.7.9.5

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