[PATCH v2 04/10] ubi: Expose mean erase counter for data in sysfs

[Rickard Andersson]

Expose mean erase counter for data area in sysfs. Data area includes
all blocks except for the fastmap area.

This value can be used in order to estimate life expectancy of the
flash.

Signed-off-by: Rickard Andersson <rickard.andersson at axis.com>
---
 drivers/mtd/ubi/build.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index f5a3a3f7d490..b253dcf849c7 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -138,6 +138,8 @@ static struct device_attribute dev_max_ec_fastmap =
 	__ATTR(max_ec_fastmap, S_IRUGO, dev_attribute_show, NULL);
 static struct device_attribute dev_mean_ec_fastmap =
 	__ATTR(mean_ec_fastmap, S_IRUGO, dev_attribute_show, NULL);
+static struct device_attribute dev_mean_ec_data =
+	__ATTR(mean_ec_data, S_IRUGO, dev_attribute_show, NULL);
 #endif
 static struct device_attribute dev_reserved_for_bad =
 	__ATTR(reserved_for_bad, S_IRUGO, dev_attribute_show, NULL);
@@ -463,6 +465,8 @@ static ssize_t dev_attribute_show(struct device *dev,
 		ret = sprintf(buf, "%d\n", ubi_calc_max_ec(ubi, 0, UBI_FM_MAX_START));
 	else if (attr == &dev_mean_ec_fastmap)
 		ret = sprintf(buf, "%d\n", ubi_calc_mean_ec(ubi, 0, UBI_FM_MAX_START));
+	else if (attr == &dev_mean_ec_data)
+		ret = sprintf(buf, "%d\n", ubi_calc_mean_ec(ubi, UBI_FM_MAX_START, ubi->peb_count));
 #endif
 	else if (attr == &dev_reserved_for_bad)
 		ret = sprintf(buf, "%d\n", ubi->beb_rsvd_pebs);
@@ -494,6 +498,7 @@ static struct attribute *ubi_dev_attrs[] = {
 #ifdef CONFIG_MTD_UBI_FASTMAP
 	&dev_max_ec_fastmap.attr,
 	&dev_mean_ec_fastmap.attr,
+	&dev_mean_ec_data.attr,
 #endif
 	&dev_reserved_for_bad.attr,
 	&dev_bad_peb_count.attr,
-- 
2.30.2