[openwrt/openwrt] ramips: mt7621: ASUS RT-AX53U add NMBM, nest firmware

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch openwrt-22.03:
https://git.openwrt.org/fc1750b305a991c7b263ea79ad921cb8952d8703

commit fc1750b305a991c7b263ea79ad921cb8952d8703
Author: Felix Baumann <felix.bau at gmx.de>
AuthorDate: Fri Mar 31 06:16:04 2023 +0200

    ramips: mt7621: ASUS RT-AX53U add NMBM, nest firmware
    
    Nests kernel and ubi into firmware partition in-order to be compatible
    with OEM firmware. This allows restoring oem firmware from a backup of
    firmware2. Add jffs2 partition which is present in the oem firmware.
    Add support for mediatek NMBM (wear leveling on newer mediatek devices).
    Exclude UBI partition from NMBM management.
    Continues PR #10685.
    
    Tested-by: Felix Baumann <felix.bau at gmx.de>
    Signed-off-by: Felix Baumann <felix.bau at gmx.de>
    (cherry picked from commit 787ecdf66de6798540fb8b756404566341b4733c)
---
 target/linux/ramips/dts/mt7621_asus_rt-ax53u.dts | 33 +++++++++++++++++++-----
 1 file changed, 26 insertions(+), 7 deletions(-)

diff --git a/target/linux/ramips/dts/mt7621_asus_rt-ax53u.dts b/target/linux/ramips/dts/mt7621_asus_rt-ax53u.dts
index a958d9909a..601a70078f 100644
--- a/target/linux/ramips/dts/mt7621_asus_rt-ax53u.dts
+++ b/target/linux/ramips/dts/mt7621_asus_rt-ax53u.dts
@@ -63,6 +63,11 @@
 &nand {
 	status = "okay";
 
+	mediatek,nmbm;
+	mediatek,bmt-remap-range =
+		<0x000000 0x7e0000>,
+		<0x35e0000 0x7800000>;
+
 	partitions {
 		compatible = "fixed-partitions";
 		#address-cells = <1>;
@@ -110,13 +115,22 @@
 		};
 
 		partition at 3e0000 {
-			label = "kernel";
-			reg = <0x3e0000 0x400000>;
-		};
+			label = "firmware";
+			reg = <0x3e0000 0x3200000>;
+
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
 
-		partition at 7e0000 {
-			label = "ubi";
-			reg = <0x7e0000 0x2e00000>;
+			partition at 0 {
+				label = "kernel";
+				reg = <0x0 0x400000>;
+			};
+
+			partition at 400000 {
+				label = "ubi";
+				reg = <0x400000 0x2e00000>;
+			};
 		};
 
 		partition at 35e0000 {
@@ -124,7 +138,12 @@
 			reg = <0x35e0000 0x3200000>;
 		};
 
-		/* Last 8M possibly store the bad block table */
+		partition at 67e0000 {
+			label = "jffs2";
+			reg = <0x67e0000 0x1020000>;
+		};
+
+		/* Last 8M are reserved for NMBM management (bad blocks) */
 	};
 };