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authorKrishna Konda <kkonda@codeaurora.org>2020-05-01 19:23:01 +0530
committerUlf Hansson <ulf.hansson@linaro.org>2020-05-28 11:21:03 +0200
commit064f7e58ee42372be05ec87fdf57864c7475ba93 (patch)
treeae51df6a8d1d9167673a8d6d7b03f3686442b366 /drivers/mmc
parent1dc5a61559e73472cd84bc8aa5b297ec0deba4de (diff)
downloadlinux-064f7e58ee42372be05ec87fdf57864c7475ba93.tar.bz2
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 <kkonda@codeaurora.org> Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org> Link: https://lore.kernel.org/r/1588341189-4371-1-git-send-email-vbadigan@codeaurora.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/core/mmc.c6
1 files changed, 6 insertions, 0 deletions
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,