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authorOhad Ben-Cohen <ohad@wizery.com>2011-04-05 19:02:26 +0400
committerChris Ball <cjb@laptop.org>2011-05-25 05:00:05 +0400
commit14e7dc76f24577694f1c121e6ce1fd2f3d46c726 (patch)
treeb16d3dbc8f7d0858b9df6490863892f70dd21dcb /drivers/mmc/core/quirks.c
parent2059a02dcb84236f9db9197fa9b00418d7b8465b (diff)
downloadlinux-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>
Diffstat (limited to 'drivers/mmc/core/quirks.c')
-rw-r--r--drivers/mmc/core/quirks.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/mmc/core/quirks.c b/drivers/mmc/core/quirks.c
index 19573981d934..a4c42edc6cb3 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 }
};