diff options
| author | Anton Vorontsov <avorontsov@ru.mvista.com> | 2009-06-18 00:14:08 +0400 |
|---|---|---|
| committer | Pierre Ossman <pierre@ossman.eu> | 2009-06-21 21:00:59 +0200 |
| commit | 5fe23c7f51def59f66bc6aeee988ef1a467a2c8c (patch) | |
| tree | 6d10aa3966cf105a8c6d6b758660fa6f00a49896 /drivers/mmc/host/sdhci-of.c | |
| parent | 04ac2f46d6ecb995f78c9ae4e2e4707d00b5339f (diff) | |
sdhci: Add support for hosts that are only capable of 1-bit transfers
Some hosts (hardware configurations, or particular SD/MMC slots) may
not support 4-bit bus. For example, on MPC8569E-MDS boards we can
switch between serial (1-bit only) and nibble (4-bit) modes, thought
we have to disable more peripherals to work in 4-bit mode.
Along with some small core changes, this patch modifies sdhci-of
driver, so that now it looks for "sdhci,1-bit-only" property in the
device-tree, and if specified we enable a proper quirk.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
Diffstat (limited to 'drivers/mmc/host/sdhci-of.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-of.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-of.c b/drivers/mmc/host/sdhci-of.c index 128c614d11a..d79fa55c3b8 100644 --- a/drivers/mmc/host/sdhci-of.c +++ b/drivers/mmc/host/sdhci-of.c @@ -250,6 +250,9 @@ static int __devinit sdhci_of_probe(struct of_device *ofdev, host->ops = &sdhci_of_data->ops; } + if (of_get_property(np, "sdhci,1-bit-only", NULL)) + host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA; + clk = of_get_property(np, "clock-frequency", &size); if (clk && size == sizeof(*clk) && *clk) of_host->clock = *clk; |