linux-kernel - [PATCH] mmc: core: Extend sysfs with OCR register

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Message-Id: <20160704115818.35614-1-prtvar.b@gmail.com>
Date:	Mon,  4 Jul 2016 13:56:55 +0200
From:	Bojan Prtvar <prtvar.b@...il.com>
To:	linux-mmc@...r.kernel.org
Cc:	Jonathan Corbet <corbet@....net>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Dong Aisheng <aisheng.dong@....com>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Gwendal Grignou <gwendal@...omium.org>,
	Chaotian Jing <chaotian.jing@...iatek.com>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] mmc: core: Extend sysfs with OCR register

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

Signed-off-by: Bojan Prtvar <prtvar.b@...il.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