Export DSR register through sysfs same as we did for the CID, CSD and OCR registers.
Signed-off-by: Bojan Prtvar <prtva...@gmail.com> --- Documentation/mmc/mmc-dev-attrs.txt | 1 + drivers/mmc/core/mmc.c | 17 +++++++++++++++++ 2 files changed, 18 insertions(+) diff --git a/Documentation/mmc/mmc-dev-attrs.txt b/Documentation/mmc/mmc-dev-attrs.txt index 8163eca..404a0e9 100644 --- a/Documentation/mmc/mmc-dev-attrs.txt +++ b/Documentation/mmc/mmc-dev-attrs.txt @@ -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: diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 1848334..4363fdc 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -745,6 +745,22 @@ 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, @@ -764,6 +780,7 @@ 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); -- 2.8.0.GIT