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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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