linux-kernel - [PATCHv3 1/1] mmc: core: export emmc revision

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Message-Id: <20171012174703.44680-1-jinqian@android.com>
Date:   Thu, 12 Oct 2017 10:46:59 -0700
From:   Jin Qian <jinqian@...roid.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Jin Qian <jinqian@...gle.com>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Uri Yanai <uri.yanai@...disk.com>,
        Chanho Min <chanho.min@....com>,
        Jungseung Lee <js07.lee@...sung.com>,
        linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org
Cc:     Jin Qian <jinqian@...roid.com>
Subject: [PATCHv3 1/1] mmc: core: export emmc revision

From: Jin Qian <jinqian@...gle.com>

Expose emmc revision as part of device attributes.

Signed-off-by: Jin Qian <jinqian@...roid.com>
---
 Documentation/ABI/testing/sysfs-bus-mmc | 4 ++++
 drivers/mmc/core/mmc.c                  | 2 ++
 2 files changed, 6 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-mmc

diff --git a/Documentation/ABI/testing/sysfs-bus-mmc b/Documentation/ABI/testing/sysfs-bus-mmc
new file mode 100644
index 000000000000..519f028d19cc
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-mmc
@@ -0,0 +1,4 @@
+What:		/sys/bus/mmc/devices/.../rev
+Date:		October 2017
+Contact:	Jin Qian <jinqian@...roid.com>
+Description:	Extended CSD revision number
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 36217ad5e9b1..4aa4cfb2c9e1 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -780,6 +780,7 @@ MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
+MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev);
 MMC_DEV_ATTR(pre_eol_info, "%02x\n", card->ext_csd.pre_eol_info);
 MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n",
 	card->ext_csd.device_life_time_est_typ_a,
@@ -838,6 +839,7 @@ static struct attribute *mmc_std_attrs[] = {
 	&dev_attr_name.attr,
 	&dev_attr_oemid.attr,
 	&dev_attr_prv.attr,
+	&dev_attr_rev.attr,
 	&dev_attr_pre_eol_info.attr,
 	&dev_attr_life_time.attr,
 	&dev_attr_serial.attr,
-- 
2.15.0.rc0.271.g36b669edcc-goog