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procd: document nand.sh a bit

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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 43372
This commit is contained in:
John Crispin 2014-11-24 19:14:17 +00:00
parent b994aca1e4
commit 19c18eba93
1 changed files with 16 additions and 0 deletions
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16
package/system/procd/files/nand.sh
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@ -201,6 +201,7 @@ nand_do_upgrade_success() {
reboot -f
}
# Flash the UBI image to MTD partition
nand_upgrade_ubinized() {
local ubi_file="$1"
local mtdnum="$(find_mtd_index "$CI_UBIPART")"
@ -223,6 +224,7 @@ nand_upgrade_ubinized() {
nand_do_upgrade_success
}
# Write the UBIFS image to UBI volume
nand_upgrade_ubifs() {
local rootfs_length=`(cat $1 | wc -c) 2> /dev/null`
@ -269,6 +271,7 @@ nand_upgrade_tar() {
nand_do_upgrade_success
}
# Recognize type of passed file and start the upgrade process
nand_do_upgrade_stage2() {
local file_type=$(identify $1)
@ -319,6 +322,19 @@ nand_upgrade_stage1() {
}
append sysupgrade_pre_upgrade nand_upgrade_stage1
# Check if passed file is a valid one for NAND sysupgrade. Currently it accepts
# 3 types of files:
# 1) UBI - should contain an ubinized image, header is checked for the proper
# MAGIC
# 2) UBIFS - should contain UBIFS partition that will replace "rootfs" volume,
# header is checked for the proper MAGIC
# 3) TRX - archive has to include "sysupgrade-BOARD" directory with a non-empty
# "CONTROL" file (at this point its content isn't verified)
#
# You usually want to call this function in platform_check_image.
#
# $(1): board name, used in case of passing TRX file
# $(2): file to be checked
nand_do_platform_check() {
local board_name="$1"
local tar_file="$2"