linux-kernel - [PATCH 2/4] mtd: add a new sys node to show the ecc step size

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Date:	Fri, 3 May 2013 14:21:42 +0800
From:	Huang Shijie <b32955@...escale.com>
To:	<dwmw2@...radead.org>
CC:	<dedekind1@...il.com>, <computersforpeace@...il.com>,
	<linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	Huang Shijie <b32955@...escale.com>
Subject: [PATCH 2/4] mtd: add a new sys node to show the ecc step size

Add a new sys node to show the ecc step size.
The application then can uses this node to get the ecc step
size.

Signed-off-by: Huang Shijie <b32955@...escale.com>
---
 drivers/mtd/mtdcore.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index e513fc4..2ed2827 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -287,6 +287,16 @@ static DEVICE_ATTR(bitflip_threshold, S_IRUGO | S_IWUSR,
 		   mtd_bitflip_threshold_show,
 		   mtd_bitflip_threshold_store);
 
+static ssize_t mtd_ecc_size_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct mtd_info *mtd = dev_get_drvdata(dev);
+
+	return snprintf(buf, PAGE_SIZE, "%lu\n", (unsigned long)mtd->ecc_size);
+
+}
+static DEVICE_ATTR(ecc_size, S_IRUGO, mtd_ecc_size_show, NULL);
+
 static struct attribute *mtd_attrs[] = {
 	&dev_attr_type.attr,
 	&dev_attr_flags.attr,
@@ -298,6 +308,7 @@ static struct attribute *mtd_attrs[] = {
 	&dev_attr_numeraseregions.attr,
 	&dev_attr_name.attr,
 	&dev_attr_ecc_strength.attr,
+	&dev_attr_ecc_size.attr,
 	&dev_attr_bitflip_threshold.attr,
 	NULL,
 };
-- 
1.7.1


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