From 064f7e58ee42372be05ec87fdf57864c7475ba93 Mon Sep 17 00:00:00 2001 From: Krishna Konda Date: Fri, 1 May 2020 19:23:01 +0530 Subject: mmc: core: expose info about enhanced rpmb support Following eMMC JEDEC JESD84-B51 standard, an enhanced form of rpmb is supported. What this enhanced mode supports is in addition to be able to write one rpmb or two rpmb frames at a time, 32 frames can be written at a time. Expose this information present in ext csd field so that the user space application that wants to make use of this can do so. Signed-off-by: Krishna Konda Signed-off-by: Veerabhadrarao Badiganti Link: https://lore.kernel.org/r/1588341189-4371-1-git-send-email-vbadigan@codeaurora.org Signed-off-by: Ulf Hansson --- drivers/mmc/core/mmc.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/mmc') diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index de94fbe629bd..4203303f946a 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -647,6 +647,9 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) mmc_hostname(card->host), card->ext_csd.cmdq_depth); } + card->ext_csd.enhanced_rpmb_supported = + (card->ext_csd.rel_param & + EXT_CSD_WR_REL_PARAM_EN_RPMB_REL_WR); } out: return err; @@ -786,6 +789,8 @@ MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", card->ext_csd.enhanced_area_offset); MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult); +MMC_DEV_ATTR(enhanced_rpmb_supported, "%#x\n", + card->ext_csd.enhanced_rpmb_supported); MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors); MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr); MMC_DEV_ATTR(rca, "0x%04x\n", card->rca); @@ -843,6 +848,7 @@ static struct attribute *mmc_std_attrs[] = { &dev_attr_enhanced_area_offset.attr, &dev_attr_enhanced_area_size.attr, &dev_attr_raw_rpmb_size_mult.attr, + &dev_attr_enhanced_rpmb_supported.attr, &dev_attr_rel_sectors.attr, &dev_attr_ocr.attr, &dev_attr_rca.attr, -- cgit v1.2.3