diff options
| author | Philip Rakity <prakity@marvell.com> | 2010-11-19 16:48:39 -0500 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2010-11-22 15:12:04 -0500 |
| commit | 15ec44611904be0dcc97b84c29fbf964e5e2b36f (patch) | |
| tree | d64384c6bf47beee40172419a29b09c2943e964e /drivers/mmc/host/sdhci-pxa.c | |
| parent | ed919b0125b26dcc052e44836f66e7e1f5c49c7e (diff) | |
mmc: sdhci: 8-bit bus width changes
We now:
* check for a v3 controller before setting 8-bit bus width
* offer a callback for platform code to switch to 8-bit mode, which
allows non-v3 controllers to support it
* rely on mmc->caps |= MMC_CAP_8_BIT_DATA; in platform code to specify
that the board designers have indeed brought out all the pins for
8-bit to the slot.
We were previously relying only on whether the *controller* supported
8-bit, which doesn't tell us anything about the pin configuration in
the board design.
This fixes the MMC card regression reported by Maxim Levitsky here:
http://thread.gmane.org/gmane.linux.kernel.mmc/4336
by no longer assuming that 8-bit works by default.
Signed-off-by: Philip Rakity <prakity@marvell.com>
Tested-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/sdhci-pxa.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-pxa.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-pxa.c b/drivers/mmc/host/sdhci-pxa.c index fc406ac5d193..5a61208cbc66 100644 --- a/drivers/mmc/host/sdhci-pxa.c +++ b/drivers/mmc/host/sdhci-pxa.c @@ -141,6 +141,10 @@ static int __devinit sdhci_pxa_probe(struct platform_device *pdev) if (pdata->quirks) host->quirks |= pdata->quirks; + /* If slot design supports 8 bit data, indicate this to MMC. */ + if (pdata->flags & PXA_FLAG_SD_8_BIT_CAPABLE_SLOT) + host->mmc->caps |= MMC_CAP_8_BIT_DATA; + ret = sdhci_add_host(host); if (ret) { dev_err(&pdev->dev, "failed to add host\n"); |