[openwrt/openwrt] lantiq: xrx200: add env-size for P-2812HNU-F1 u-boot-env

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/695284443668020ee161cb06836781a725d3dde5

commit 695284443668020ee161cb06836781a725d3dde5
Author: Burak Aydos <byhexadecimal at gmail.com>
AuthorDate: Thu Jan 29 22:25:04 2026 +0300

    lantiq: xrx200: add env-size for P-2812HNU-F1 u-boot-env
    
    The u-boot-env partition on the Zyxel P-2812HNU-F1 is 128 KiB but
    the actual environment data is only 8 KiB (0x2000 bytes). Without
    the env-size property, the u-boot,env nvmem layout driver assumes
    env-size equals the full partition size and computes an incorrect
    CRC32 over the entire 128 KiB, causing all nvmem cell reads to fail
    silently.
    
    Add env-size = <0x2000> so the CRC32 is computed over the correct
    8 KiB region, allowing nvmem-cells (such as ethaddr) to be read
    properly by the kernel.
    
    Signed-off-by: Burak Aydos <byhexadecimal at gmail.com>
    Link: https://github.com/openwrt/openwrt/pull/21780
    Signed-off-by: Robert Marko <robimarko at gmail.com>
---
 .../lantiq/files/arch/mips/boot/dts/lantiq/vr9_zyxel_p-2812hnu-f1.dts    | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/lantiq/files/arch/mips/boot/dts/lantiq/vr9_zyxel_p-2812hnu-f1.dts b/target/linux/lantiq/files/arch/mips/boot/dts/lantiq/vr9_zyxel_p-2812hnu-f1.dts
index 74858ec118..8657e8b81d 100644
--- a/target/linux/lantiq/files/arch/mips/boot/dts/lantiq/vr9_zyxel_p-2812hnu-f1.dts
+++ b/target/linux/lantiq/files/arch/mips/boot/dts/lantiq/vr9_zyxel_p-2812hnu-f1.dts
@@ -47,6 +47,7 @@
 
 				nvmem-layout {
 					compatible = "u-boot,env";
+					env-size = <0x2000>;
 
 					macaddr_uboot_ethaddr: ethaddr {
 						#nvmem-cell-cells = <1>;