A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 03:27:44 -04:00
Code Issues Projects Releases Packages Wiki Activity

mtd: part: Add sysfs variable for offset of partition

Browse source 
This patch makes a sysfs variable called 'offset' on each partition
which contains the offset in bytes from the beginning of the master
device that the partition starts.

Signed-off-by: Dan Ehrenberg <[email protected]>
Signed-off-by: Brian Norris <[email protected]>
This commit is contained in:
Dan Ehrenberg 2015-04-02 15:15:11 -07:00 • committed by Brian Norris
commit a62c24d755
2 changed files with 39 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

29
drivers/mtd/mtdpart.c
View file

@ -554,6 +554,30 @@ out_register:
return slave;
}
static ssize_t mtd_partition_offset_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mtd_info *mtd = dev_get_drvdata(dev);
struct mtd_part *part = PART(mtd);
return snprintf(buf, PAGE_SIZE, "%lld\n", part->offset);
}
static DEVICE_ATTR(offset, S_IRUGO, mtd_partition_offset_show, NULL);
static const struct attribute *mtd_partition_attrs[] = {
&dev_attr_offset.attr,
NULL
};
static int mtd_add_partition_attrs(struct mtd_part *new)
{
int ret = sysfs_create_files(&new->mtd.dev.kobj, mtd_partition_attrs);
if (ret)
printk(KERN_WARNING
"mtd: failed to create partition attrs, err=%d\n", ret);
return ret;
}
int mtd_add_partition(struct mtd_info *master, const char *name,
long long offset, long long length)
{
@ -603,6 +627,8 @@ int mtd_add_partition(struct mtd_info *master, const char *name,
add_mtd_device(&new->mtd);
mtd_add_partition_attrs(new);
return ret;
err_inv:
mutex_unlock(&mtd_partitions_mutex);
@ -620,6 +646,8 @@ int mtd_del_partition(struct mtd_info *master, int partno)
list_for_each_entry_safe(slave, next, &mtd_partitions, list)
if ((slave->master == master) &&
(slave->mtd.index == partno)) {
sysfs_remove_files(&slave->mtd.dev.kobj,
mtd_partition_attrs);
ret = del_mtd_device(&slave->mtd);
if (ret < 0)
break;
@ -663,6 +691,7 @@ int add_mtd_partitions(struct mtd_info *master,
mutex_unlock(&mtd_partitions_mutex);
add_mtd_device(&slave->mtd);
mtd_add_partition_attrs(slave);
cur_offset = slave->offset + slave->mtd.size;
}