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 <[email protected]> --- 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 } }; -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
