From 14e7dc76f24577694f1c121e6ce1fd2f3d46c726 Mon Sep 17 00:00:00 2001 From: Ohad Ben-Cohen Date: Tue, 5 Apr 2011 18:02:26 +0300 Subject: [PATCH] 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 Signed-off-by: Chris Ball --- drivers/mmc/core/quirks.c | 2 ++ 1 file changed, 2 insertions(+) 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 } };