[openwrt/openwrt] bcm63xx: A4001N A-000-1A1-AX: remove PSI (nvram) partition

[LEDE Commits]

noltari pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/0efbfef4f68a796c2214b5222a1f044d2bcc158b

commit 0efbfef4f68a796c2214b5222a1f044d2bcc158b
Author: Daniele Castro <danielecastro at hotmail.it>
AuthorDate: Sat Sep 5 17:33:23 2020 +0200

    bcm63xx: A4001N A-000-1A1-AX: remove PSI (nvram) partition
    
    ADB P.DG A4001N A-000-1A1-AX a.k.a. Telecom Italia ADSL2+ Wi-Fi N (AGPWI)
    is a Telecom Italia braded router and it seems that there are no public
    available unbranded versions of this router.
    
    The stock Telecom Italia braded firmware has many partitions and the
    partition layout changes with every firmware relase.
    
    The PSI nvram partition is present in the stock firmware under the
    "UNKNOWN" name but it's empty, full of FFs. Since removing partitions
    does not cause problems with the stock firmware reflashing procedure,
    I removed from the dts the PSI nvram partition from OpenWrt, expanded
    the rootfs one and added the NVRAM partition contained in the
    cfe bootloader.
    
    Furthermore this router's flash needs to be entirely reprogrammed
    and a new generic bcm6328 cfe must be flashed to boot OpenWrt. The
    same process takes place when reflashing the stock firmware.
    
    Here follows the original flash layout for AGPWI_1.1.0_013, the last
    stock Telecom Italia braded firmware for which we have root
    credentials (admin/riattizzati).
    
    Flash layout:
    
    Section 00 Type BOOT       Range 0x00000000-0x00020000 MaxSize 0x00020000
            No more information.
    
    Section 01 Type IMAGE      Range 0x00020000-0x007C0000 MaxSize 0x0079FF6C
            Uninitialized.
    
    Section 02 Type IMAGE      Range 0x00800000-0x00FA0000 MaxSize 0x0079FF6C
            Uninitialized.
    
    Section 03 Type CONF       Range 0x00FA0000-0x00FC0000 MaxSize 0x0001FF6C
            Size 0x0000841E Name 'rg_conf'
            Checksum 0x0041E03B Counter 0x0000051F Start Offset 0x00000000
    
    Section 04 Type CONF       Range 0x00FC0000-0x00FE0000 MaxSize 0x0001FF6C
            Size 0x0000838E Name 'rg_conf'
            Checksum 0x00419A5A Counter 0x00000522 Start Offset 0x00000000
    
    Section 05 Type FACTORY    Range 0x00FE0000-0x00FF0000 MaxSize 0x0000FF6C
            Size 0x00000554 Name 'rg_factory'
            Checksum 0x0001255E Counter 0x000004D3 Start Offset 0x00000000
    
    Section 06 Type UNKNOWN    Range 0x00FF0000-0x01000000 MaxSize 0x00010000
            No more information.
    
    Total 7 sections found.
    
    The last AGPWI firmware relase should be AGPWI_4.0.6 and it has much more
    partitions than AGPWI_1.1.0_013.
    
    The cfe partition in the stock firmware is 0x00020000 bytes long unlike the
    OpenWrt dts in wich it's 0x00010000 bytes long because from 0x00010000 to
    0x00020000 in the stock cfe there are only 00s and also because the cfe must
    anyway be reflashed with a generic bcm6328 cfe 0x00010000 bytes long to
    run OpenWrt.
    
    Signed-off-by: Daniele Castro <danielecastro at hotmail.it>
    [Amend commit, remove unneeded cfe_nvram partition]
    Signed-off-by: Álvaro Fernández Rojas <noltari at gmail.com>
---
 target/linux/bcm63xx/dts/bcm6328-adb-pdg-a4001n-a-000-1a1-ax.dts | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/target/linux/bcm63xx/dts/bcm6328-adb-pdg-a4001n-a-000-1a1-ax.dts b/target/linux/bcm63xx/dts/bcm6328-adb-pdg-a4001n-a-000-1a1-ax.dts
index 7b8c03f890..f42b970c46 100644
--- a/target/linux/bcm63xx/dts/bcm6328-adb-pdg-a4001n-a-000-1a1-ax.dts
+++ b/target/linux/bcm63xx/dts/bcm6328-adb-pdg-a4001n-a-000-1a1-ax.dts
@@ -135,15 +135,10 @@
 			};
 
 			partition at 10000 {
-				reg = <0x010000 0xfe0000>;
+				reg = <0x010000 0xff0000>;
 				label = "linux";
 				compatible = "brcm,bcm963xx-imagetag";
 			};
-
-			partition at ff0000 {
-				reg = <0xff0000 0x010000>;
-				label = "nvram";
-			};
 		};
 	};
 };