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@gmx.de>
Signed-off-by: Felix Baumann <felix.bau@gmx.de>

diff --git a/target/linux/ramips/dts/mt7621_asus_rt-ax53u.dts b/target/linux/ramips/dts/mt7621_asus_rt-ax53u.dts
index cbd6a3ce07bf5a7b39d385e97246a482aecf5527..d740d00c6dffd72677e5f7913c367758bf08be1c 100644 (file)
--- 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@3e0000 {
-                       label = "kernel";
-                       reg = <0x3e0000 0x400000>;
-               };
+                       label = "firmware";
+                       reg = <0x3e0000 0x3200000>;
+
+                       compatible = "fixed-partitions";
+                       #address-cells = <1>;
+                       #size-cells = <1>;
 
-               partition@7e0000 {
-                       label = "ubi";
-                       reg = <0x7e0000 0x2e00000>;
+                       partition@0 {
+                               label = "kernel";
+                               reg = <0x0 0x400000>;
+                       };
+
+                       partition@400000 {
+                               label = "ubi";
+                               reg = <0x400000 0x2e00000>;
+                       };
                };
 
                partition@35e0000 {
@@ -124,7 +138,12 @@
                        reg = <0x35e0000 0x3200000>;
                };
 
-               /* Last 8M possibly store the bad block table */
+               partition@67e0000 {
+                       label = "jffs2";
+                       reg = <0x67e0000 0x1020000>;
+               };
+
+               /* Last 8M are reserved for NMBM management (bad blocks) */
        };
 };