diff mbox series

[v3,05/10] ubi: Expose max erase counter for data in sysfs

Message ID 20241011125904.2915983-5-rickard.andersson@axis.com
State New
Headers show
Series [v3,01/10] ubi: Expose mean erase counter in sysfs | expand

Commit Message

Rickard Andersson Oct. 11, 2024, 12:58 p.m. UTC 
Expose max 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.

Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Rickard Andersson <rickard.andersson@axis.com>
---
 drivers/mtd/ubi/build.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 9cc7bc74f0d2..fa1ff0146572 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_max_ec_data =
+	__ATTR(max_ec_data, 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
@@ -462,6 +464,8 @@  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_max_ec_data)
+		ret = sprintf(buf, "%d\n", ubi_calc_max_ec(ubi, UBI_FM_MAX_START, ubi->peb_count));
 	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
@@ -495,6 +499,7 @@  static struct attribute *ubi_dev_attrs[] = {
 #ifdef CONFIG_MTD_UBI_FASTMAP
 	&dev_max_ec_fastmap.attr,
 	&dev_mean_ec_fastmap.attr,
+	&dev_max_ec_data.attr,
 	&dev_mean_ec_data.attr,
 #endif
 	&dev_reserved_for_bad.attr,