From: Ryan QIAN Date: Thu, 22 Nov 2012 07:38:46 +0000 (+0800) Subject: ENGR00234519 mmc: support eMMC v4.5 memory cards X-Git-Tag: v3.0.35-fsl~224 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5c955ab8b5eb5591a074ee9a0a6b192078e9c227;p=karo-tx-linux.git ENGR00234519 mmc: support eMMC v4.5 memory cards Bypass eMMC version checking, so that eMMC v4.5 can work on current kernel as eMMC v4.4 cards, no specific v4.5 feature supported. Only basic read/write operations are supported, also ddr mode is supported. Acked-by: Dong Aisheng Signed-off-by: Ryan QIAN --- diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index f8ffabd187cf..ce5e63c61b51 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -259,7 +259,8 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) } card->ext_csd.rev = ext_csd[EXT_CSD_REV]; - if (card->ext_csd.rev > 5) { + /* workaround: support emmc 4.5 cards to work at emmc 4.4 mode */ + if (card->ext_csd.rev > 6) { printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n", mmc_hostname(card->host), card->ext_csd.rev); err = -EINVAL;