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79 lines
2.5 KiB
Diff
79 lines
2.5 KiB
Diff
From c26369f5b9929e1187ccf716d6d1678196ec0b4f Mon Sep 17 00:00:00 2001
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From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
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Date: Mon, 12 Aug 2013 14:14:58 -0300
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Subject: [PATCH 125/203] mtd: nand: pxa3xx: Allow devices with no dma
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resources
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When use_dma=0 there's no point in requesting resources for dma,
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since they won't be used anyway. Therefore we remove that requirement,
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therefore allowing devices without dma to pass the driver probe.
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Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
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Tested-by: Daniel Mack <zonque@gmail.com>
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Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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---
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drivers/mtd/nand/pxa3xx_nand.c | 51 +++++++++++++++++++++++-------------------
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1 file changed, 28 insertions(+), 23 deletions(-)
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--- a/drivers/mtd/nand/pxa3xx_nand.c
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+++ b/drivers/mtd/nand/pxa3xx_nand.c
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@@ -1141,30 +1141,35 @@ static int alloc_nand_resource(struct pl
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if (ret < 0)
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return ret;
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- /*
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- * This is a dirty hack to make this driver work from devicetree
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- * bindings. It can be removed once we have a prober DMA controller
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- * framework for DT.
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- */
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- if (pdev->dev.of_node && of_machine_is_compatible("marvell,pxa3xx")) {
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- info->drcmr_dat = 97;
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- info->drcmr_cmd = 99;
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- } else {
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- r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
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- if (r == NULL) {
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- dev_err(&pdev->dev, "no resource defined for data DMA\n");
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- ret = -ENXIO;
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- goto fail_disable_clk;
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- }
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- info->drcmr_dat = r->start;
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+ if (use_dma) {
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+ /*
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+ * This is a dirty hack to make this driver work from
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+ * devicetree bindings. It can be removed once we have
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+ * a prober DMA controller framework for DT.
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+ */
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+ if (pdev->dev.of_node &&
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+ of_machine_is_compatible("marvell,pxa3xx")) {
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+ info->drcmr_dat = 97;
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+ info->drcmr_cmd = 99;
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+ } else {
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+ r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
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+ if (r == NULL) {
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+ dev_err(&pdev->dev,
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+ "no resource defined for data DMA\n");
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+ ret = -ENXIO;
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+ goto fail_disable_clk;
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+ }
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+ info->drcmr_dat = r->start;
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- r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
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- if (r == NULL) {
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- dev_err(&pdev->dev, "no resource defined for command DMA\n");
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- ret = -ENXIO;
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- goto fail_disable_clk;
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+ r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
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+ if (r == NULL) {
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+ dev_err(&pdev->dev,
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+ "no resource defined for cmd DMA\n");
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+ ret = -ENXIO;
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+ goto fail_disable_clk;
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+ }
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+ info->drcmr_cmd = r->start;
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}
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- info->drcmr_cmd = r->start;
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}
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irq = platform_get_irq(pdev, 0);
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