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    Subject[PATCH] mmc: core: Extend sysfs with OCR register
    Date
    Make operation conditions register (OCR) easily accessible from user space.

    Signed-off-by: Bojan Prtvar <prtvar.b@gmail.com>
    ---
    Documentation/mmc/mmc-dev-attrs.txt | 1 +
    drivers/mmc/core/mmc.c | 2 ++
    2 files changed, 3 insertions(+)

    diff --git a/Documentation/mmc/mmc-dev-attrs.txt b/Documentation/mmc/mmc-dev-attrs.txt
    index caa5557..8163eca 100644
    --- a/Documentation/mmc/mmc-dev-attrs.txt
    +++ b/Documentation/mmc/mmc-dev-attrs.txt
    @@ -28,6 +28,7 @@ All attributes are read-only.
    preferred_erase_size Preferred erase size
    raw_rpmb_size_mult RPMB partition size
    rel_sectors Reliable write sector count
    + ocr Operation Conditions Register

    Note on Erase Size and Preferred Erase Size:

    diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
    index 5d438ad..1848334 100644
    --- a/drivers/mmc/core/mmc.c
    +++ b/drivers/mmc/core/mmc.c
    @@ -727,6 +727,7 @@ MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
    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);
    +MMC_DEV_ATTR(ocr, "%08x\n", card->ocr);

    static ssize_t mmc_fwrev_show(struct device *dev,
    struct device_attribute *attr,
    @@ -762,6 +763,7 @@ static struct attribute *mmc_std_attrs[] = {
    &dev_attr_enhanced_area_size.attr,
    &dev_attr_raw_rpmb_size_mult.attr,
    &dev_attr_rel_sectors.attr,
    + &dev_attr_ocr.attr,
    NULL,
    };
    ATTRIBUTE_GROUPS(mmc_std);
    --
    2.8.0.GIT
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