Commit 78b8d647 authored Jul 16, 2012 by Asutosh Das Committed by Stephen Boyd Jul 08, 2013

mmc: core: power-cycle sd card on error



Hardware reset is not implemented in SD card. To circumvent this,
a power-cycle is issued to the card & it is reinitialized.
This would help recovering from 'card stuck in programming state'
situations.

mmc_can_reset:	Added check for SD card.

CRs-fixed: 375869
Change-Id: I8bd7dc071f3569898371d5becca06ec2fe937d4a
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>

parent 347109c9

drivers/mmc/core/core.c

+8 −4

Original line number	Diff line number	Diff line
		@@ -2165,11 +2165,15 @@ int mmc_can_reset(struct mmc_card *card)
		{
		u8 rst_n_function;

		if (!mmc_card_mmc(card))
		if (mmc_card_sdio(card))
		return 0;

		if (mmc_card_mmc(card)) {
		rst_n_function = card->ext_csd.rst_n_function;
		if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
		if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) !=
		EXT_CSD_RST_N_ENABLED)
		return 0;
		}
		return 1;
		}
		EXPORT_SYMBOL(mmc_can_reset);