From: Stefano Babic Date: Wed, 20 Jan 2010 17:20:39 +0000 (+0100) Subject: mmc: check correctness of the voltage mask in ocr X-Git-Tag: v2010.03-rc1~31 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=250de12bc2f7842807d25e16971c5bea59c3a4b1;p=u-boot mmc: check correctness of the voltage mask in ocr Most cards do not answer if some reserved bits in the ocr are set. However, some controllers can set bit 7 (reserved for low voltages), but how to manage low voltages SD card is not yet specified. Signed-off-by: Stefano Babic --- diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index b69ce152a8..d91b9b7f3a 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -273,7 +273,15 @@ sd_send_op_cond(struct mmc *mmc) cmd.cmdidx = SD_CMD_APP_SEND_OP_COND; cmd.resp_type = MMC_RSP_R3; - cmd.cmdarg = mmc->voltages; + + /* + * Most cards do not answer if some reserved bits + * in the ocr are set. However, Some controller + * can set bit 7 (reserved for low voltages), but + * how to manage low voltages SD card is not yet + * specified. + */ + cmd.cmdarg = mmc->voltages & 0xff8000; if (mmc->version == SD_VERSION_2) cmd.cmdarg |= OCR_HCS;