user app should know whether hw reset function is enable to use it. so I try to add sysfs file of hw reset function like enhanced area.
Signed-off-by: Namjae Jeon <[email protected]> --- drivers/mmc/core/mmc.c | 6 ++++++ include/linux/mmc/card.h | 1 + include/linux/mmc/mmc.h | 1 + 3 files changed, 8 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 10f5a19..06c3ffc 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -355,6 +355,10 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) card->ext_csd.raw_trim_mult = ext_csd[EXT_CSD_TRIM_MULT]; if (card->ext_csd.rev >= 4) { + /* HW reset function feature support. + /* user can know it is enable through sysfs interface. + card->ext_csd.raw_hw_reset_function = + ext_csd[EXT_CSD_RST_FUNCTION]; /* * Enhanced area feature support -- check whether the eMMC * card has the Enhanced area enabled. If so, export enhanced @@ -499,6 +503,7 @@ 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_hw_reset_function, "0x%02x\n", card->ext_csd.raw_hw_reset_function); static struct attribute *mmc_std_attrs[] = { &dev_attr_cid.attr, @@ -514,6 +519,7 @@ 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_hw_reset_function.attr, NULL, }; diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index b460fc2..237bceb 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -65,6 +65,7 @@ struct mmc_ext_csd { unsigned int enhanced_area_size; /* Units: KB */ unsigned int boot_size; /* in bytes */ u8 raw_partition_support; /* 160 */ + u8 raw_hw_reset_function; /* 162 */ u8 raw_erased_mem_count; /* 181 */ u8 raw_ext_csd_structure; /* 194 */ u8 raw_card_type; /* 196 */ diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index 5a794cb..233c932 100644 --- a/include/linux/mmc/mmc.h +++ b/include/linux/mmc/mmc.h @@ -272,6 +272,7 @@ struct _mmc_csd { #define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */ #define EXT_CSD_PARTITION_SUPPORT 160 /* RO */ +#define EXT_CSD_RST_FUNCTION 162 /* R/W */ #define EXT_CSD_WR_REL_PARAM 166 /* RO */ #define EXT_CSD_ERASE_GROUP_DEF 175 /* R/W */ #define EXT_CSD_PART_CONFIG 179 /* R/W */ -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
