diff options
| author | Ohad Ben-Cohen <ohad@wizery.com> | 2011-04-05 15:02:26 (GMT) |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-05-25 01:00:05 (GMT) |
| commit | 14e7dc76f24577694f1c121e6ce1fd2f3d46c726 (patch) | |
| tree | b16d3dbc8f7d0858b9df6490863892f70dd21dcb | |
| parent | 2059a02dcb84236f9db9197fa9b00418d7b8465b (diff) | |
| download | linux-14e7dc76f24577694f1c121e6ce1fd2f3d46c726.tar.xz | |
mmc: quirks: wl1271 is MMC_QUIRK_DISABLE_CD
The wl12xx device supports disconnecting the pull-up resistor on
CD/DAT[3] (pin 1) of the card.
Tell SDIO core to disconnect that resistor during card init,
since we don't need it at that point (and anyway all
hosts shall provide pull-up resistors on all data lines DAT[3:0]
as described in section 6 of the SD physical specification).
As a result, this may save some power, but it's also generally healthy
since it prevents both ends from pulling up that pin, which
results in undesirable asymmetric physical bus.
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
| -rw-r--r-- | drivers/mmc/core/quirks.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/mmc/core/quirks.c b/drivers/mmc/core/quirks.c index 1957398..a4c42ed 100644 --- a/drivers/mmc/core/quirks.c +++ b/drivers/mmc/core/quirks.c @@ -66,6 +66,8 @@ static const struct mmc_fixup mmc_fixup_methods[] = { remove_quirk, MMC_QUIRK_BROKEN_CLK_GATING }, { SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271, add_quirk, MMC_QUIRK_NONSTD_FUNC_IF }, + { SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271, + add_quirk, MMC_QUIRK_DISABLE_CD }, { 0 } }; |