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mmc: msm_sdcc: Handle dma resource not present case
If DMA resource is not available then SDCC driver should atleast work in PIO data transfer mode. Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Sahitya Tummala <stummala@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org> Signed-off-by: Chris Ball <cjb@laptop.org>
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parent
19207f056d
commit
190657c9f4
1 changed files with 10 additions and 5 deletions
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@ -1242,9 +1242,13 @@ msmsdcc_probe(struct platform_device *pdev)
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/*
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* Setup DMA
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*/
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ret = msmsdcc_init_dma(host);
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if (ret)
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goto ioremap_free;
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if (host->dmares) {
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ret = msmsdcc_init_dma(host);
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if (ret)
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goto ioremap_free;
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} else {
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host->dma.channel = -1;
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}
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/* Get our clocks */
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host->pclk = clk_get(&pdev->dev, "sdc_pclk");
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@ -1388,8 +1392,9 @@ msmsdcc_probe(struct platform_device *pdev)
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pclk_put:
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clk_put(host->pclk);
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dma_free:
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dma_free_coherent(NULL, sizeof(struct msmsdcc_nc_dmadata),
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host->dma.nc, host->dma.nc_busaddr);
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if (host->dmares)
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dma_free_coherent(NULL, sizeof(struct msmsdcc_nc_dmadata),
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host->dma.nc, host->dma.nc_busaddr);
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ioremap_free:
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tasklet_kill(&host->dma_tlet);
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iounmap(host->base);
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