diff options
| author |   Jerry Huang <Chang-Ming.Huang@freescale.com> | 2012-01-16 14:13:03 +0800 |
|---|---|---|
| committer |   Chris Ball <cjb@laptop.org> | 2012-02-13 20:38:59 -0500 |
| commit | 81e499224a7ef02e1889736ebb6b432da1735ab6 (patch) | |
| tree | ab93daf08770a47ce137cba476c0012ae241315a /drivers | |
| parent | mmc: core: Ensure clocks are always enabled before host interaction (diff) | |
| download | linux-dev-81e499224a7ef02e1889736ebb6b432da1735ab6.tar.xz linux-dev-81e499224a7ef02e1889736ebb6b432da1735ab6.zip | |
mmc: esdhc: add PIO mode support
For some FSL ESDHC controllers (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: Jerry Huang <Chang-Ming.Huang@freescale.com>
Signed-off-by: Gao Guanhua <B22826@freescale.com>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | 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 03970bcb3495..67b9ab075dee 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.Xie@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); |