Re: [PATCH] mmc : export hw reset function info to user

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On 18/09/11 18:20, Namjae Jeon wrote:
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.

This conflicts with my patches:

http://marc.info/?l=linux-mmc&m=131462534514277&w=2
http://marc.info/?l=linux-mmc&m=131462534614281&w=2
http://marc.info/?l=linux-mmc&m=131462534714284&w=2
http://marc.info/?l=linux-mmc&m=131462534814287&w=2
http://marc.info/?l=linux-mmc&m=131462535014290&w=2
http://marc.info/?l=linux-mmc&m=131462535214297&w=2


Signed-off-by: Namjae Jeon<linkinjeon@xxxxxxxxx>
---
  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 */

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