Hi, Anton, Could you have any comment about this serial patch? Thanks Jerry Huang > -----Original Message----- > From: Huang Changming-R66093 > Sent: Friday, January 06, 2012 1:33 PM > To: linux-mmc@vger.kernel.org > Cc: Huang Changming-R66093; Gao Guanhua-B22826; Chris Ball > Subject: [PATCH 1/5 v2] ESDHC: add PIO mode support > > From: Jerry Huang <chang-ming.hu...@freescale.com> > > For some FSL ESDHC controller(e.g. P2020E, Rev1.0), the SDHC can not work > on DMA mode because of the hardware bug, so we set a broken dma flag and > use PIO mode. > > Signed-off-by: Gao Guanhua <b22...@freescale.com> > Signed-off-by: Jerry Huang <chang-ming.hu...@freescale.com> > CC: Chris Ball <c...@laptop.org> > --- > changes for v2: > - change the property to compatible for quirks > > drivers/mmc/host/sdhci-pltfm.c | 5 ++++- > 1 files changed, 4 insertions(+), 1 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci- > pltfm.c index a9e12ea..ba36c36 100644 > --- a/drivers/mmc/host/sdhci-pltfm.c > +++ b/drivers/mmc/host/sdhci-pltfm.c > @@ -2,7 +2,7 @@ > * sdhci-pltfm.c Support for SDHCI platform devices > * Copyright (c) 2009 Intel Corporation > * > - * Copyright (c) 2007 Freescale Semiconductor, Inc. > + * Copyright (c) 2007, 2011 Freescale Semiconductor, Inc. > * Copyright (c) 2009 MontaVista Software, Inc. > * > * Authors: Xiaobo Xie <x....@freescale.com> @@ -71,6 +71,9 @@ void > sdhci_get_of_property(struct platform_device *pdev) > if (sdhci_of_wp_inverted(np)) > host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT; > > + if (of_device_is_compatible(np, "fsl,p2020-rev1-esdhc")) > + host->quirks |= SDHCI_QUIRK_BROKEN_DMA; > + > clk = of_get_property(np, "clock-frequency", &size); > if (clk && size == sizeof(*clk) && *clk) > pltfm_host->clock = be32_to_cpup(clk); > -- > 1.7.5.4
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