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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>
This commit is contained in:
Loic Pallardy 2012-08-06 17:12:29 +02:00 committed by Chris Ball
parent 53d8f97462
commit 188cc0424e
2 changed files with 11 additions and 0 deletions
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7
Documentation/mmc/mmc-dev-attrs.txt
View File

@ -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
==================================

4
drivers/mmc/core/mmc.c
View File

@ -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,
};