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Commit a9b672e8 authored by Mike Dunn's avatar Mike Dunn Committed by David Woodhouse
Browse files

mtd: expose ecc_strength through sysfs 



ecc_strength element of struct mtd_info is exposed as a read-only variable in
sysfs.

Signed-off-by: default avatarMike Dunn <mikedunn@newsguy.com>
Signed-off-by: default avatarArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 44df4d11

Documentation/ABI/testing/sysfs-class-mtd

+12 −0
Original line number Diff line number Diff line
@@ -123,3 +123,15 @@ Description: 
		half page, or a quarter page).



		In the case of ECC NOR, it is the ECC block size.



What:		/sys/class/mtd/mtdX/ecc_strength

Date:		April 2012

KernelVersion:	3.4

Contact:	linux-mtd@lists.infradead.org

Description:

		Maximum number of bit errors that the device is capable of

		correcting within each region covering an ecc step.  This will

		always be a non-negative integer.  Note that some devices will

		have multiple ecc steps within each writesize region.



		In the case of devices lacking any ECC capability, it is 0.

drivers/mtd/mtdcore.c

+10 −0
Original line number Diff line number Diff line
@@ -250,6 +250,15 @@ static ssize_t mtd_name_show(struct device *dev, 
}

static DEVICE_ATTR(name, S_IRUGO, mtd_name_show, NULL);



static ssize_t mtd_ecc_strength_show(struct device *dev,

				     struct device_attribute *attr, char *buf)

{

	struct mtd_info *mtd = dev_get_drvdata(dev);



	return snprintf(buf, PAGE_SIZE, "%u\n", mtd->ecc_strength);

}

static DEVICE_ATTR(ecc_strength, S_IRUGO, mtd_ecc_strength_show, NULL);



static struct attribute *mtd_attrs[] = {

	&dev_attr_type.attr,

	&dev_attr_flags.attr,
@@ -260,6 +269,7 @@ static struct attribute *mtd_attrs[] = { 
	&dev_attr_oobsize.attr,

	&dev_attr_numeraseregions.attr,

	&dev_attr_name.attr,

	&dev_attr_ecc_strength.attr,

	NULL,

};