[openwrt/openwrt] ramips: add NMBM support for ipTIME AX2004M

[LEDE Commits]

mans0n pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/7e04a611bc798c27a0dc584959d2c2bdf64da05f

commit 7e04a611bc798c27a0dc584959d2c2bdf64da05f
Author: Sungbo Eo <mans0n at gorani.run>
AuthorDate: Mon Dec 18 01:06:21 2023 +0900

    ramips: add NMBM support for ipTIME AX2004M
    
    AX2004M uses NMBM on its NAND flash, but it was not enabled in DTS as the
    device support [1] had been added before NMBM feature in mtk_bmt driver [2].
    Let's enable it now.
    
    With this change, there is a low possibility of boot failure after
    sysupgrade from older versions. As AX2004M already has gone through
    two stable releases in the meantime, it would be safe to warn users
    by bumping DEVICE_COMPAT_VERSION.
    
    [1] 37753f34ac68 ("ramips: add support for ipTIME AX2004M")
    [2] 06382d1af7b2 ("kernel: add support for mediatek NMBM flash mapping support")
    
    Signed-off-by: Sungbo Eo <mans0n at gorani.run>
---
 target/linux/ramips/dts/mt7621_iptime_ax2004m.dts                  | 7 +++++++
 target/linux/ramips/image/mt7621.mk                                | 4 ++++
 .../linux/ramips/mt7621/base-files/etc/board.d/05_compat-version   | 3 +++
 3 files changed, 14 insertions(+)

diff --git a/target/linux/ramips/dts/mt7621_iptime_ax2004m.dts b/target/linux/ramips/dts/mt7621_iptime_ax2004m.dts
index 51be0d4939..7237bf822f 100644
--- a/target/linux/ramips/dts/mt7621_iptime_ax2004m.dts
+++ b/target/linux/ramips/dts/mt7621_iptime_ax2004m.dts
@@ -57,6 +57,11 @@
 &nand {
 	status = "okay";
 
+	mediatek,nmbm;
+	mediatek,bmt-max-ratio = <1>;
+	mediatek,bmt-max-reserved-blocks = <64>;
+	mediatek,bmt-remap-range = <0x000000 0x580000>;
+
 	partitions {
 		compatible = "fixed-partitions";
 		#address-cells = <1>;
@@ -118,6 +123,8 @@
 				reg = <0x400000 0x7280000>;
 			};
 		};
+
+		/* last 8 MiB is reserved for NMBM bad block table */
 	};
 };
 
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index ab1b829ba0..7b7266b73e 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -1461,6 +1461,10 @@ define Device/iptime_ax2004m
   DEVICE_VENDOR := ipTIME
   DEVICE_MODEL := AX2004M
   DEVICE_PACKAGES := kmod-mt7915-firmware kmod-usb3 -uboot-envtools
+  DEVICE_COMPAT_VERSION := 2.0
+  DEVICE_COMPAT_MESSAGE := NMBM has been newly enabled, and its flash block \
+	mapping might be incompatible with existing installation. \
+	New installation via recovery mode is recommended.
 endef
 TARGET_DEVICES += iptime_ax2004m
 
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/05_compat-version b/target/linux/ramips/mt7621/base-files/etc/board.d/05_compat-version
index 45bef9385b..c510dfd81a 100644
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/05_compat-version
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/05_compat-version
@@ -8,6 +8,9 @@
 board_config_update
 
 case "$(board_name)" in
+	iptime,ax2004m)
+		ucidef_set_compat_version "2.0"
+		;;
 	*)
 		ucidef_set_compat_version "1.1"
 		;;