mmc: core: Extend sysfs to ext_csd parameters for RPMB support

Extend current sysfs access to ext_csd rpmb parameters (RPMB partition
size) and rel_sector information.

Signed-off-by: Loic Pallardy <loic.pallardy@stericsson.com>
Reviewed-by: Namjae Jeon <linkinjeon@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Johan Rudholm <johan.rudholm@stericsson.com>
Acked-by: Krishna Konda <kkonda@codeaurora.org>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/Documentation/mmc/mmc-dev-attrs.txt b/Documentation/mmc/mmc-dev-attrs.txt
index 22ae844..0d98fac 100644 (file)
--- a/Documentation/mmc/mmc-dev-attrs.txt
+++ b/Documentation/mmc/mmc-dev-attrs.txt
@@ -25,6 +25,8 @@ All attributes are read-only.
        serial                  Product Serial Number (from CID Register)
        erase_size              Erase group size
        preferred_erase_size    Preferred erase size
+       raw_rpmb_size_mult      RPMB partition size
+       rel_sectors             Reliable write sector count
 
 Note on Erase Size and Preferred Erase Size:
 
@@ -65,6 +67,11 @@ Note on Erase Size and Preferred Erase Size:
 
        "preferred_erase_size" is in bytes.
 
+Note on raw_rpmb_size_mult:
+       "raw_rpmb_size_mult" is a mutliple of 128kB block.
+       RPMB size in byte is calculated by using the following equation:
+       RPMB partition size = 128kB x raw_rpmb_size_mult
+
 SD/MMC/SDIO Clock Gating Attribute
 ==================================
 

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 6c55766..f605d6e 100644 (file)
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -626,6 +626,8 @@ MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
 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(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
 
 static struct attribute *mmc_std_attrs[] = {
        &dev_attr_cid.attr,
@@ -641,6 +643,8 @@ static struct attribute *mmc_std_attrs[] = {
        &dev_attr_serial.attr,
        &dev_attr_enhanced_area_offset.attr,
        &dev_attr_enhanced_area_size.attr,
+       &dev_attr_raw_rpmb_size_mult.attr,
+       &dev_attr_rel_sectors.attr,
        NULL,
 };