target/linux/gemini/patches-5.10/0003-ARM-dts-gemini-NAS4220-B-fis-index-block-with-128-Ki.patch

   1 From 447fd4347f06af3a369045149ba74f9b914cd99e Mon Sep 17 00:00:00 2001
   2 From: Christian Lamparter <chunkeey@gmail.com>
   3 Date: Tue, 23 Nov 2021 21:42:21 +0100
   4 Subject: [PATCH] ARM: dts: gemini: NAS4220-B: fis-index-block with 128 KiB
   5  sectors
   6
   7 Steven Maddox reported in the OpenWrt bugzilla, that his
   8 RaidSonic IB-NAS4220-B was no longer booting with the new
   9 OpenWrt 21.02 (uses linux 5.10's device-tree). However, it was
  10 working with the previous OpenWrt 19.07 series (uses 4.14).
  11
  12 |[    5.548038] No RedBoot partition table detected in 30000000.flash
  13 |[    5.618553] Searching for RedBoot partition table in 30000000.flash at offset 0x0
  14 |[    5.739093] No RedBoot partition table detected in 30000000.flash
  15 |...
  16 |[    7.039504] Waiting for root device /dev/mtdblock3...
  17
  18 The provided bootlog shows that the RedBoot partition parser was
  19 looking for the partition table "at offset 0x0". Which is strange
  20 since the comment in the device-tree says it should be at 0xfe0000.
  21
  22 Further digging on the internet led to a review site that took
  23 some useful PCB pictures of their review unit back in February 2009.
  24 Their picture shows a Spansion S29GL128N11TFI01 flash chip.
  25
  26 From Spansion's Datasheet:
  27 "S29GL128N: One hundred twenty-eight 64 Kword (128 Kbyte) sectors"
  28 The reported also provided a "cat /sys/class/mtd/mtd0/erasesize",
  29 which returned "131072".
  30
  31 With the 128 KiB Sector/Erasesize in mind. This patch changes the
  32 fis-index-block property to (0xfe0000 / 0x20000) = 0x7f.
  33
  34 Note:
  35 Let's hope the vendor stuck to the 128 KiB sector size flash chip
  36 for all units still out there.
  37
  38 Fixes: b5a923f8c739 ("ARM: dts: gemini: Switch to redboot partition parsing")
  39 Bugzilla: https://bugs.openwrt.org/index.php?do=details&task_id=4137
  40 Reported-by: Steven Maddox <s.maddox@lantizia.me.uk>
  41 Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
  42 --- a/arch/arm/boot/dts/gemini-nas4220b.dts
  43 +++ b/arch/arm/boot/dts/gemini-nas4220b.dts
  44 @@ -84,7 +84,7 @@
  45                         partitions {
  46                                 compatible = "redboot-fis";
  47                                 /* Eraseblock at 0xfe0000 */
  48 -                               fis-index-block = <0x1fc>;
  49 +                               fis-index-block = <0x7f>;
  50                         };
  51                 };
  52