Commit 6825a606 authored by Bojan Prtvar's avatar Bojan Prtvar Committed by Ulf Hansson
Browse files

mmc: core: Extend sysfs with DSR register 



Export DSR register through sysfs same as we did for the CID, CSD and
OCR registers.

Signed-off-by: default avatarBojan Prtvar <prtvar.b@gmail.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 2c4c7146

Documentation/mmc/mmc-dev-attrs.txt

+1 −0
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ All attributes are read-only. 
	raw_rpmb_size_mult	RPMB partition size

	rel_sectors		Reliable write sector count

	ocr 			Operation Conditions Register

	dsr			Driver Stage Register



Note on Erase Size and Preferred Erase Size:

drivers/mmc/core/mmc.c

+17 −0
Original line number Diff line number Diff line
@@ -767,6 +767,22 @@ static ssize_t mmc_fwrev_show(struct device *dev, 


static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);



static ssize_t mmc_dsr_show(struct device *dev,

			    struct device_attribute *attr,

			    char *buf)

{

	struct mmc_card *card = mmc_dev_to_card(dev);

	struct mmc_host *host = card->host;



	if (card->csd.dsr_imp && host->dsr_req)

		return sprintf(buf, "0x%x\n", host->dsr);

	else

		/* return default DSR value */

		return sprintf(buf, "0x%x\n", 0x404);

}



static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);



static struct attribute *mmc_std_attrs[] = {

	&dev_attr_cid.attr,

	&dev_attr_csd.attr,
@@ -786,6 +802,7 @@ static struct attribute *mmc_std_attrs[] = { 
	&dev_attr_raw_rpmb_size_mult.attr,

	&dev_attr_rel_sectors.attr,

	&dev_attr_ocr.attr,

	&dev_attr_dsr.attr,

	NULL,

};

ATTRIBUTE_GROUPS(mmc_std);

drivers/mmc/core/sd.c

+17 −0
Original line number Diff line number Diff line
@@ -678,6 +678,22 @@ MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 
MMC_DEV_ATTR(ocr, "%08x\n", card->ocr);





static ssize_t mmc_dsr_show(struct device *dev,

                           struct device_attribute *attr,

                           char *buf)

{

       struct mmc_card *card = mmc_dev_to_card(dev);

       struct mmc_host *host = card->host;



       if (card->csd.dsr_imp && host->dsr_req)

               return sprintf(buf, "0x%x\n", host->dsr);

       else

               /* return default DSR value */

               return sprintf(buf, "0x%x\n", 0x404);

}



static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);



static struct attribute *sd_std_attrs[] = {

	&dev_attr_cid.attr,

	&dev_attr_csd.attr,
@@ -692,6 +708,7 @@ static struct attribute *sd_std_attrs[] = { 
	&dev_attr_oemid.attr,

	&dev_attr_serial.attr,

	&dev_attr_ocr.attr,

	&dev_attr_dsr.attr,

	NULL,

};

ATTRIBUTE_GROUPS(sd_std);