Hi,
I got the same problem.
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 782c0ee..a0991ad 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1849,7 +1849,7 @@ int sdhci_add_host(struct sdhci_host *host)
mmc->caps |= MMC_CAP_SDIO_IRQ;
if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA))
- mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA;
+ mmc->caps |= MMC_CAP_4_BIT_DATA;
if (caps & SDHCI_CAN_DO_HISPD)
mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
In case of MMC, host->caps & MMC_CAP_8_BIT_DATA is always true. so
can't use the MMC_CAP_4_BIT_DATA.
/*
* Activate wide bus and DDR (if supported).
*/
if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
unsigned ext_csd_bit, bus_width;
if (host->caps & MMC_CAP_8_BIT_DATA) {
if (ddr)
ext_csd_bit = EXT_CSD_DDR_BUS_WIDTH_8;
else
ext_csd_bit = EXT_CSD_BUS_WIDTH_8;
bus_width = MMC_BUS_WIDTH_8;
} else {
if (ddr)
ext_csd_bit = EXT_CSD_DDR_BUS_WIDTH_4;
else
ext_csd_bit = EXT_CSD_BUS_WIDTH_4;
bus_width = MMC_BUS_WIDTH_4;
}
Thank you,
Kyungmin Park
On Wed, Nov 3, 2010 at 3:24 PM, Wolfram Sang <w.sang@xxxxxxxxxxxxxx> wrote:
> On Wed, Nov 03, 2010 at 06:57:35AM +0100, Wolfram Sang wrote:
>> On Sat, Oct 30, 2010 at 05:53:46AM +0200, Maxim Levitsky wrote:
>> > Hi,
>> >
>> > I just bisected and reverted this commit.
>>
>> Commit-ID would have been useful, too: b08caed8659ab27199db51c63a35c5ee067fc7ef
>> Also, adding the author to cc, done now.
>
> Sorry, just saw that the threading got somehow broken and the thread was
> continued. Sorry for the noise!
>
> --
> Pengutronix e.K. | Wolfram Sang |
> Industrial Linux Solutions | http://www.pengutronix.de/ |
>
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