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mmc: davinci_mmc: allow driver to work without DMA resource 

Do not return probe failure with missing DMA resources, allow driver
to work in PIO mode.  Tested on da850-evm by mounting partition
followed by file creation and deletion.

Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
hifive-unleashed-5.1
Manjunathappa, Prakash 2013-02-05 17:52:24 +05:30 committed by Chris Ball
parent c69042a51e
commit e3e020f8ac
1 changed files with 6 additions and 4 deletions
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10
drivers/mmc/host/davinci_mmc.c
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@ -1190,13 +1190,15 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!r)
goto out;
host->rxdma = r->start;
dev_warn(&pdev->dev, "RX DMA resource not specified\n");
else
host->rxdma = r->start;
r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
if (!r)
goto out;
host->txdma = r->start;
dev_warn(&pdev->dev, "TX DMA resource not specified\n");
else
host->txdma = r->start;
host->mem_res = mem;
host->base = ioremap(mem->start, mem_size);