[PATCH] mmc: core: Extend sysfs with OCR register

[Bojan Prtvar]

Make operation conditions register (OCR) easily accessible from user space.

Signed-off-by: Bojan Prtvar <prtva...@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