From: Ivan Khoronzhuk Date: Tue, 17 Dec 2013 13:38:31 +0000 (+0200) Subject: mtd: nand: davinci: don't request AEMIF address range X-Git-Tag: firefly_0821_release~176^2~4541^2~75 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0966a416d22bb5d4a5444e5a8eb0e0ae671826e6;p=firefly-linux-kernel-4.4.55.git mtd: nand: davinci: don't request AEMIF address range The TI AEMIF driver registers are used to setup timings for each chip select. The same registers range is used to setup NAND settings. The AEMIF and NAND drivers not use the same registers in this range. In case with TI AEMIF driver, the memory address range is requested already by AEMIF, so we cannot request it twice, just ioremap. Acked-by: Santosh Shilimkar Reviewed-by: Grygorii Strashko Reviewed-by: Taras Kondratiuk Signed-off-by: Ivan Khoronzhuk Signed-off-by: Brian Norris --- diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c index 8a61a40f2ca9..0104d262dc89 100644 --- a/drivers/mtd/nand/davinci_nand.c +++ b/drivers/mtd/nand/davinci_nand.c @@ -637,9 +637,17 @@ static int nand_davinci_probe(struct platform_device *pdev) if (IS_ERR(vaddr)) return PTR_ERR(vaddr); - base = devm_ioremap_resource(&pdev->dev, res2); - if (IS_ERR(base)) - return PTR_ERR(base); + /* + * This registers range is used to setup NAND settings. In case with + * TI AEMIF driver, the same memory address range is requested already + * by AEMIF, so we cannot request it twice, just ioremap. + * The AEMIF and NAND drivers not use the same registers in this range. + */ + base = devm_ioremap(&pdev->dev, res2->start, resource_size(res2)); + if (!base) { + dev_err(&pdev->dev, "ioremap failed for resource %pR\n", res2); + return -EADDRNOTAVAIL; + } info->dev = &pdev->dev; info->base = base;