[openwrt/openwrt] qualcommax: ipq50xx: upgrade SMEM dualboot Linksys devices

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/7d685825794a613f67543d0e00f31dca5d8163ba

commit 7d685825794a613f67543d0e00f31dca5d8163ba
Author: George Moussalem <george.moussalem at outlook.com>
AuthorDate: Thu Dec 4 09:20:00 2025 +0400

    qualcommax: ipq50xx: upgrade SMEM dualboot Linksys devices
    
    Add support for upgrades on dual firmware Linksys devices with the
    partition table stored in SMEM and that store both the kernel and rootfs
    in a single partition. Switching the active boot partition requires
    updating the partition info table in SMEM in addition to setting
    the active boot partition in a U-boot variable as U-boot will keep them
    in sync upon reboot if they're not.
    
    U-boot always sets the name of the active partition to rootfs and that
    of the inactive partition to rootfs_1 in SMEM. when Linux loads the
    partition table from SMEM it will load the right partition based on the
    offset set in the SMEM partition table. For upgrades, flashing to the
    alternate partition will always be to rootfs_1, while flashing the
    current partition will be on rootfs.
    
    Signed-off-by: George Moussalem <george.moussalem at outlook.com>
    Link: https://github.com/openwrt/openwrt/pull/21038
    Signed-off-by: Robert Marko <robimarko at gmail.com>
---
 .../ipq50xx/base-files/lib/upgrade/platform.sh     | 77 ++++++++++++++++++++++
 1 file changed, 77 insertions(+)

diff --git a/target/linux/qualcommax/ipq50xx/base-files/lib/upgrade/platform.sh b/target/linux/qualcommax/ipq50xx/base-files/lib/upgrade/platform.sh
index 9d921f73b6..bbc6d8eb7f 100644
--- a/target/linux/qualcommax/ipq50xx/base-files/lib/upgrade/platform.sh
+++ b/target/linux/qualcommax/ipq50xx/base-files/lib/upgrade/platform.sh
@@ -1,3 +1,5 @@
+. /lib/functions/bootconfig.sh
+
 PART_NAME=firmware
 REQUIRE_IMAGE_METADATA=1
 
@@ -50,6 +52,81 @@ remove_oem_ubi_volume() {
 	fi
 }
 
+linksys_bootconfig_set_primaryboot() {
+	local partname=$1
+	local tempfile
+	local mtdidx
+
+	mtdidx=$(find_mtd_index "$partname")
+	[ ! "$mtdidx" ] && {
+		echo "cannot find mtd index for $partname"
+		return 1
+	}
+
+	# No need to cleanup as files in /tmp will be removed upon reboot
+	tempfile=/tmp/mtd"$mtdidx".bin
+	dd if=/dev/mtd"$mtdidx" of="$tempfile" bs=1 count=336 2>/dev/null
+	[ $? -ne 0 ] || [ ! -f "$tempfile" ]&& {
+		echo "failed to create a temp copy of /dev/mtd$mtdidx"
+		return 1
+	}
+
+	set_bootconfig_primaryboot "$tempfile" "0:HLOS" $2
+	[ $? -ne 0 ] && {
+		echo "failed to toggle primaryboot on 0:HLOS part"
+		return 1
+	}
+	
+	set_bootconfig_primaryboot "$tempfile" "rootfs" $2
+	[ $? -ne 0 ] && {
+		echo "failed to toggle primaryboot for rootfs part"
+		return 1
+	}
+
+	mtd write "$tempfile" /dev/mtd"$mtdidx" 2>/dev/null
+	[ $? -ne 0 ] && {
+		echo "failed to write temp copy back to /dev/mtd$mtdidx"
+		return 1
+	}
+}
+
+linksys_bootconfig_pre_upgrade() {
+	local setenv_script="/tmp/fw_env_upgrade"
+
+	CI_UBIPART="rootfs_1"
+	boot_part="$(fw_printenv -n boot_part)"
+	if [ -n "$UPGRADE_OPT_USE_CURR_PART" ]; then
+		CI_UBIPART="rootfs"
+	else
+		if [ "$boot_part" -eq "1" ]; then
+			echo "boot_part 2" >> $setenv_script
+			linksys_bootconfig_set_primaryboot "0:bootconfig" 1
+			linksys_bootconfig_set_primaryboot "0:bootconfig1" 1
+		else
+			echo "boot_part 1" >> $setenv_script
+			linksys_bootconfig_set_primaryboot "0:bootconfig" 0
+			linksys_bootconfig_set_primaryboot "0:bootconfig1" 0
+		fi
+	fi
+
+	boot_part_ready="$(fw_printenv -n boot_part_ready)"
+	if [ "$boot_part_ready" -ne "3" ]; then
+		echo "boot_part_ready 3" >> $setenv_script
+	fi
+
+	auto_recovery="$(fw_printenv -n auto_recovery)"
+	if [ "$auto_recovery" != "yes" ]; then
+		echo "auto_recovery yes" >> $setenv_script
+	fi
+
+	if [ -f "$setenv_script" ]; then
+		fw_setenv -s $setenv_script || {
+			echo "failed to update U-Boot environment"
+			return 1
+		}
+	fi
+}
+
 linksys_mx_pre_upgrade() {
 	local setenv_script="/tmp/fw_env_upgrade"