linux-kernel - [PATCH v2 2/3] mmc: omap_hsmmc: Skip platform_get_resource

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Message-Id: <1362518004-7083-3-git-send-email-mporter@ti.com>
Date:	Tue,  5 Mar 2013 16:13:23 -0500
From:	Matt Porter <mporter@...com>
To:	Balaji T K <balajitk@...com>, Chris Ball <cjb@...top.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>
Cc:	Vinod Koul <vinod.koul@...el.com>,
	Tony Lindgren <tony@...mide.com>,
	Devicetree Discuss <devicetree-discuss@...ts.ozlabs.org>,
	Linux OMAP List <linux-omap@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux MMC List <linux-mmc@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>, Dan Williams <djbw@...com>,
	Jon Hunter <jon-hunter@...com>,
	Santosh Shilimkar <santosh.shilimkar@...com>
Subject: [PATCH v2 2/3] mmc: omap_hsmmc: Skip platform_get_resource_byname() for dt case

From: Santosh Shilimkar <santosh.shilimkar@...com>

MMC driver probe will abort for DT case because of failed
platform_get_resource_byname() lookup. Fix it by skipping resource
byname lookup for device tree build.

Issue is hidden because hwmod popullates the IO resources which
helps to succeed platform_get_resource_byname() and probe.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@...com>
---
 drivers/mmc/host/omap_hsmmc.c |   28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index e79b12d..8ae1225 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1896,21 +1896,23 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 
 	omap_hsmmc_conf_bus_power(host);
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
-	if (!res) {
-		dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n");
-		ret = -ENXIO;
-		goto err_irq;
-	}
-	tx_req = res->start;
+	if (!pdev->dev.of_node) {
+		res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
+		if (!res) {
+			dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n");
+			ret = -ENXIO;
+			goto err_irq;
+		}
+		tx_req = res->start;
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
-	if (!res) {
-		dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n");
-		ret = -ENXIO;
-		goto err_irq;
+		res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
+		if (!res) {
+			dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n");
+			ret = -ENXIO;
+			goto err_irq;
+		}
+		rx_req = res->start;
 	}
-	rx_req = res->start;
 
 	dma_cap_zero(mask);
 	dma_cap_set(DMA_SLAVE, mask);
-- 
1.7.9.5

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