That regulator definitions haven't changed since the 19.07.0 days (2018-07-29).
No idea what broke with the regulator driver or the regulator devicetree since then.
Anyway, the DTB #1 I just posted contained an error (it's regulator-boot-on and not regulators-boot-on )
https://paste.debian.net/1212408
this should now should "do" something in the regulator driver. (though there was a patch for boot-on property in 5.8. So this might or might not work... and could behave differently with 5.10)
Downloaded and applied new/fixed DTB #1, didn't help, doesn't boot:
U-Boot 2009.08-svn54115 (Nov 15 2011 - 10:54:56), Build: 0.0.12
CPU: AMCC PowerPC APM82181 Rev. E at 800 MHz (PLB=200, OPB=100, EBC=100 MHz)
Security support
Bootstrap Option E - Boot ROM Location NOR/SRAM (8 bits)
32 kB I-Cache 32 kB D-Cache
Board: Apollo-3G - APM82181 Board, 2*SATA, 1*USB
U-Boot 2009.08-svn54115 (Nov 15 2011 - 10:54:56), Build: 0.0.12
CPU: AMCC PowerPC APM82181 Rev. E at 800 MHz (PLB=200, OPB=100, EBC=100 MHz)
Security support
Bootstrap Option E - Boot ROM Location NOR/SRAM (8 bits)
32 kB I-Cache 32 kB D-Cache
Board: Apollo-3G - APM82181 Board, 2*SATA, 1*USB
I2C: ready
DRAM: Auto calibration 256 MB
FLASH: 512 kB
DTT: 1 FAILED INIT
Net: PHY EC1 Register: 0x2c8c
ppc_4xx_eth0
Type run flash_nfs to mount root filesystem over NFS
p=============================================================================q
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::WWWWWWWWW::::WWWWWWW::::::::WWWWWWW::DDDDDDDDDDDDDDDDD::::::::::::|
|:::::::::::WWWWWWWW::::WWWWWWWW:::::::WWWWWWW::DDDDDDDDDDDDDDDDDDDD::::::::::|
|:::::::::::WWWWWWWW:::WWWWWWWWW::::::WWWWWWW::DDDDDDDDDDDDDDDDDDDDDD:::::::::|
|::::::::::::::::::::::::::::::::::::::::::::::::::::::::::DDDDDDDDDDD::::::::|
|:::::::::::WWWWWWW:::WWWWWWWWWW::::WWWWWWW::DDDDDDDDD:::::::DDDDDDDDD::::::::|
|:::::::::::WWWWWWW::WWWWWWWWWWW:::WWWWWWW::DDDDDDDDD::::::::DDDDDDDDD::::::::|
|:::::::::::WWWWWW::WWWWWW::WWWWW:WWWWWWW::DDDDDDDDDD:::::::DDDDDDDDDD::::::::|
|:::::::::::WWWWWWWWWWWWW:::WWWWWWWWWWWW::DDDDDDDDDD::::::DDDDDDDDDDD:::::::::|
|:::::::::::WWWWWWWWWWWW::::WWWWWWWWWWW::DDDDDDDDDDD:::DDDDDDDDDDDDD::::::::::|
|:::::::::::WWWWWWWWWWW:::::WWWWWWWWWW::DDDDDDDDDDDDDDDDDDDDDDDDDD::::::::::::|
|:::::::::::WWWWWWWWWW::::::WWWWWWWWW::DDDDDDDDDDDDDDDDDDDDDDDDD::::::::::::::|
|:::::::::::WWWWWWWWW:::::::WWWWWWWW::DDDDDDDDDDDDDDDDDDDDDDDD::::::::::::::::|
|:::::::::::WWWWWWWW::::::::WWWWWWW::DDDDDDDDDDDDDDDDDDDD:::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
b=============================================================================d
Hit any key to stop autoboot: 0
USB: OTG-Controller ID(0x4F54) Version(0x290A)
Err detect usb time out hostport.d32 0x00001000
0 USB Device(s) found
scanning bus for storage devices...
0 Storage Device(s) found
** Block device usb 0 not supported
Board is not configured for test. Do normal boot.
----- Checking Boot Partitions -----
SATA DWC initialization 0
init: Waiting for device...
sata_dwc: Device found
scan: Waiting for device...
SATA DWC initialization 1
sata_dwc: Hard Disk not found. Status = 0x7f
** Bad partition 1 **
SATA DWC initialization 0
init: Waiting for device...
sata_dwc: Device found
scan: Waiting for device...
SATA DWC initialization 1
sata_dwc: Hard Disk not found. Status = 0x7f
Loading file "/boot/boot.scr" from sata device 0:1 (hda1)
622 bytes read
0:1
## Executing script at 00100000
SATA DWC initialization 0
init: Waiting for device...
sata_dwc: Device found
scan: Waiting for device...
SATA DWC initialization 1
sata_dwc: Hard Disk not found. Status = 0x7f
Loading file "/boot/uImage" from sata device 0:1 (hda1)
3726701 bytes read
Loading file "/boot/apollo3g.dtb" from sata device 0:1 (hda1)
16384 bytes read
Loaded part 1
## Booting kernel from Legacy Image at 01000000 ...
Image Name: POWERPC OpenWrt Linux-5.4.143
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 3726637 Bytes = 3.6 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Flattened Device Tree blob at 01800000
Booting using the fdt blob at 0x1800000
Uncompressing Kernel Image ... OK
Loading Device Tree to 00ff9000, end 00ffffff ... OK
[ 0.000000] printk: bootconsole [udbg0] enabled
[ 0.000000] Linux version 5.4.143 (builder@buildhost) (gcc version 8.4.0 (OpenWrt GCC 8.4.0 r16279-5cc0535800)) #0 Tue Aug 31 22:20:08 2021
[ 0.000000] Using PowerPC 44x Platform machine description
[ 0.000000] -----------------------------------------------------
[ 0.000000] phys_mem_size = 0x10000000
[ 0.000000] dcache_bsize = 0x20
[ 0.000000] icache_bsize = 0x20
[ 0.000000] cpu_features = 0x0000000000000120
[ 0.000000] possible = 0x0000000040000120
[ 0.000000] always = 0x0000000000000120
[ 0.000000] cpu_user_features = 0x8c008000 0x00000000
[ 0.000000] mmu_features = 0x00000008
[ 0.000000] -----------------------------------------------------
[ 0.000000] Top of RAM: 0x10000000, Total RAM: 0x10000000
[ 0.000000] Memory hole size: 0MB
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] On node 0 totalpages: 65536
[ 0.000000] Normal zone: 576 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 65536 pages, LIFO batch:15
[ 0.000000] MMU: Allocated 1088 bytes of context maps for 255 contexts
[ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[ 0.000000] pcpu-alloc: [0] 0
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 64960
[ 0.000000] Kernel command line: root=/dev/sda2 rw rootfstype=squashfs,ext4 console=ttyS0,115200
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes, linear)
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] Memory: 251692K/262144K available (6436K kernel code, 236K rwdata, 744K rodata, 180K init, 229K bss, 10452K reserved, 0K cma-reserved)
[ 0.000000] Kernel virtual memory layout:
[ 0.000000] * 0xfffdf000..0xfffff000 : fixmap
[ 0.000000] * 0xd1000000..0xfffdf000 : vmalloc & ioremap
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS: 512, nr_irqs: 512, preallocated irqs: 16
[ 0.000000] UIC0 (32 IRQ sources) at DCR 0xc0
[ 0.000000] UIC1 (32 IRQ sources) at DCR 0xd0
[ 0.000000] UIC2 (32 IRQ sources) at DCR 0xe0
[ 0.000000] UIC3 (32 IRQ sources) at DCR 0xf0
[ 0.000000] random: get_random_u32 called from 0xc07059e4 with crng_init=0
[ 0.000000] time_init: decrementer frequency = 800.000008 MHz
[ 0.000000] time_init: processor frequency = 800.000008 MHz
[ 0.000019] clocksource: timebase: mask: 0xffffffffffffffff max_cycles: 0xb881274fa3, max_idle_ns: 440795210636 ns
[ 0.010285] clocksource: timebase mult[1400000] shift[24] registered
[ 0.016603] clockevent: decrementer mult[ccccccef] shift[32] cpu[0]
[ 0.022897] pid_max: default: 32768 minimum: 301
[ 0.027565] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.034801] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.046927] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[ 0.056602] futex hash table entries: 256 (order: -1, 3072 bytes, linear)
[ 0.066036] NET: Registered protocol family 16
[ 0.070991] DMA: preallocated 256 KiB pool for atomic allocations
[ 0.079066] 256k L2-cache enabled
[ 0.082410] PCIE0: Port disabled via device-tree
[ 0.087627] PCI: Probing PCI hardware
[ 0.105407] SCSI subsystem initialized
[ 0.109848] libata version 3.00 loaded.
[ 0.114778] workqueue: max_active 576 requested for napi_workq is out of range, clamping between 1 and 512
[ 0.125564] clocksource: Switched to clocksource timebase
[ 0.131611] thermal_sys: Registered thermal governor 'step_wise'
[ 0.131821] NET: Registered protocol family 2
[ 0.142153] IP idents hash table entries: 4096 (order: 3, 32768 bytes, linear)
[ 0.149828] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 4096 bytes, linear)
[ 0.158106] TCP established hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.165700] TCP bind hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.172689] TCP: Hash tables configured (established 2048 bind 2048)
[ 0.179064] UDP hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.185519] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.192554] NET: Registered protocol family 1
[ 0.196863] PCI: CLS 0 bytes, default 32
[ 0.204882] dw_dmac 4bffd0800.dma: DesignWare DMA Controller, 2 channels
[ 0.216670] workingset: timestamp_bits=14 max_order=16 bucket_order=2
[ 0.228400] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.299419] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
[ 0.307688] GPIO line 473 (Enable Reset Button, disable NOR) hogged as output/low
[ 0.315930] Serial: 8250/16550 driver, 16 ports, IRQ sharing enabled
[ 0.324344] printk: console [ttyS0] disabled
[ 0.328601] 4ef600300.serial: ttyS0 at MMIO 0x4ef600300 (irq = 33, base_baud = 462962) is a TI16750
[ 0.337573] printk: console [ttyS0] enabled
[ 0.337573] printk: console [ttyS0] enabled
[ 0.345841] printk: bootconsole [udbg0] disabled
[ 0.345841] printk: bootconsole [udbg0] disabled
[ 0.359157] loop: module loaded
[ 0.362325] Loading iSCSI transport class v2.0-870.
[ 0.373502] sata-dwc 4bffd1000.sata: id 0, controller version 1.91
[ 0.380910] scsi host0: sata-dwc
[ 0.384476] ata1: SATA max UDMA/133 irq 40
[ 0.388722] sata-dwc 4bffd1800.sata: id 0, controller version 1.91
[ 0.396189] scsi host1: sata-dwc
[ 0.399666] ata2: SATA max UDMA/133 irq 41
[ 0.404546] libphy: Fixed MDIO Bus: probed
[ 0.408651] PPC 4xx OCP EMAC driver, version 3.54
[ 0.413786] MAL v2 /plb/mcmal, 1 TX channels, 1 RX channels
[ 0.419567] RGMII /plb/opb/emac-rgmii@ef601500 initialized with MDIO support
[ 0.426783] TAH /plb/opb/emac-tah@ef601350 initialized
[ 0.432232] /plb/opb/emac-rgmii@ef601500: input 0 in rgmii mode
[ 0.438296] libphy: emac_mdio: probed
[ 0.446584] eth0: EMAC-0 /plb/opb/ethernet@ef600c00, MAC 00:90:a9:36:57:dc
[ 0.453474] eth0: found Broadcom BCM50610 PHY (0x01)
[ 0.458534] i2c /dev entries driver
[ 0.462127] booke_wdt: powerpc book-e watchdog driver loaded
[ 0.482692] NET: Registered protocol family 10
[ 0.488885] Segment Routing with IPv6
[ 0.492655] NET: Registered protocol family 17
[ 0.497140] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 0.510054] 8021q: 802.1Q VLAN Support v1.8
[ 0.514300] drmem: No dynamic reconfiguration memory found
[ 0.520234] usb-regulator GPIO handle specifies active low - ignored
[ 0.526882] sata1-regulator GPIO handle specifies active low - ignored
[ 0.533703] sata0-regulator GPIO handle specifies active low - ignored
[ 0.755816] ata2: SATA link down (SStatus 0 SControl 300)
[ 0.761278] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 5.909584] ata1.00: qc timeout (cmd 0xec)
[ 5.913682] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
[ 6.231783] ata1: SATA link down (SStatus 0 SControl 300)
[ 6.237246] md: Waiting for all devices to be available before autodetect
[ 6.244021] md: If you don't use raid, use raid=noautodetect
[ 6.250151] md: Autodetecting RAID arrays.
[ 6.254258] md: autorun ...
[ 6.257040] md: ... autorun DONE.
[ 6.260865] /dev/root: Can't open blockdev
[ 6.264979] VFS: Cannot open root device "sda2" or unknown-block(0,0): error -6
[ 6.272268] Please append a correct "root=" boot option; here are the available partitions:
[ 6.280597] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 6.288826] Rebooting in 1 seconds..
Re-applied DTB #2, boots:
U-Boot 2009.08-svn54115 (Nov 15 2011 - 10:54:56), Build: 0.0.12
CPU: AMCC PowerPC APM82181 Rev. E at 800 MHz (PLB=200, OPB=100, EBC=100 MHz)
Security support
Bootstrap Option E - Boot ROM Location NOR/SRAM (8 bits)
32 kB I-Cache 32 kB D-Cache
Board: Apollo-3G - APM82181 Board, 2*SATA, 1*USB
I2C: ready
DRAM: Auto calibration 256 MB
FLASH: 512 kB
DTT: 1 FAILED INIT
Net: PHY EC1 Register: 0x2c8c
ppc_4xx_eth0
Type run flash_nfs to mount root filesystem over NFS
p=============================================================================q
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::WWWWWWWWW::::WWWWWWW::::::::WWWWWWW::DDDDDDDDDDDDDDDDD::::::::::::|
|:::::::::::WWWWWWWW::::WWWWWWWW:::::::WWWWWWW::DDDDDDDDDDDDDDDDDDDD::::::::::|
|:::::::::::WWWWWWWW:::WWWWWWWWW::::::WWWWWWW::DDDDDDDDDDDDDDDDDDDDDD:::::::::|
|::::::::::::::::::::::::::::::::::::::::::::::::::::::::::DDDDDDDDDDD::::::::|
|:::::::::::WWWWWWW:::WWWWWWWWWW::::WWWWWWW::DDDDDDDDD:::::::DDDDDDDDD::::::::|
|:::::::::::WWWWWWW::WWWWWWWWWWW:::WWWWWWW::DDDDDDDDD::::::::DDDDDDDDD::::::::|
|:::::::::::WWWWWW::WWWWWW::WWWWW:WWWWWWW::DDDDDDDDDD:::::::DDDDDDDDDD::::::::|
|:::::::::::WWWWWWWWWWWWW:::WWWWWWWWWWWW::DDDDDDDDDD::::::DDDDDDDDDDD:::::::::|
|:::::::::::WWWWWWWWWWWW::::WWWWWWWWWWW::DDDDDDDDDDD:::DDDDDDDDDDDDD::::::::::|
|:::::::::::WWWWWWWWWWW:::::WWWWWWWWWW::DDDDDDDDDDDDDDDDDDDDDDDDDD::::::::::::|
|:::::::::::WWWWWWWWWW::::::WWWWWWWWW::DDDDDDDDDDDDDDDDDDDDDDDDD::::::::::::::|
|:::::::::::WWWWWWWWW:::::::WWWWWWWW::DDDDDDDDDDDDDDDDDDDDDDDD::::::::::::::::|
|:::::::::::WWWWWWWW::::::::WWWWWWW::DDDDDDDDDDDDDDDDDDDD:::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
b=============================================================================d
Hit any key to stop autoboot: 0
USB: OTG-Controller ID(0x4F54) Version(0x290A)
Err detect usb time out hostport.d32 0x00001000
0 USB Device(s) found
scanning bus for storage devices...
0 Storage Device(s) found
** Block device usb 0 not supported
Board is not configured for test. Do normal boot.
----- Checking Boot Partitions -----
SATA DWC initialization 0
init: Waiting for device...
sata_dwc: Device found
scan: Waiting for device...
SATA DWC initialization 1
sata_dwc: Hard Disk not found. Status = 0x7f
** Bad partition 1 **
SATA DWC initialization 0
init: Waiting for device...
sata_dwc: Device found
scan: Waiting for device...
SATA DWC initialization 1
sata_dwc: Hard Disk not found. Status = 0x7f
Loading file "/boot/boot.scr" from sata device 0:1 (hda1)
622 bytes read
0:1
## Executing script at 00100000
SATA DWC initialization 0
init: Waiting for device...
sata_dwc: Device found
scan: Waiting for device...
SATA DWC initialization 1
sata_dwc: Hard Disk not found. Status = 0x7f
Loading file "/boot/uImage" from sata device 0:1 (hda1)
3726701 bytes read
Loading file "/boot/apollo3g.dtb" from sata device 0:1 (hda1)
16384 bytes read
Loaded part 1
## Booting kernel from Legacy Image at 01000000 ...
Image Name: POWERPC OpenWrt Linux-5.4.143
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 3726637 Bytes = 3.6 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Flattened Device Tree blob at 01800000
Booting using the fdt blob at 0x1800000
Uncompressing Kernel Image ... OK
Loading Device Tree to 00ff9000, end 00ffffff ... OK
[ 0.000000] printk: bootconsole [udbg0] enabled
[ 0.000000] Linux version 5.4.143 (builder@buildhost) (gcc version 8.4.0 (OpenWrt GCC 8.4.0 r16279-5cc0535800)) #0 Tue Aug 31 22:20:08 2021
[ 0.000000] Using PowerPC 44x Platform machine description
[ 0.000000] -----------------------------------------------------
[ 0.000000] phys_mem_size = 0x10000000
[ 0.000000] dcache_bsize = 0x20
[ 0.000000] icache_bsize = 0x20
[ 0.000000] cpu_features = 0x0000000000000120
[ 0.000000] possible = 0x0000000040000120
[ 0.000000] always = 0x0000000000000120
[ 0.000000] cpu_user_features = 0x8c008000 0x00000000
[ 0.000000] mmu_features = 0x00000008
[ 0.000000] -----------------------------------------------------
[ 0.000000] Top of RAM: 0x10000000, Total RAM: 0x10000000
[ 0.000000] Memory hole size: 0MB
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] On node 0 totalpages: 65536
[ 0.000000] Normal zone: 576 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 65536 pages, LIFO batch:15
[ 0.000000] MMU: Allocated 1088 bytes of context maps for 255 contexts
[ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[ 0.000000] pcpu-alloc: [0] 0
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 64960
[ 0.000000] Kernel command line: root=/dev/sda2 rw rootfstype=squashfs,ext4 console=ttyS0,115200
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes, linear)
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] Memory: 251696K/262144K available (6436K kernel code, 236K rwdata, 744K rodata, 180K init, 229K bss, 10448K reserved, 0K cma-reserved)
[ 0.000000] Kernel virtual memory layout:
[ 0.000000] * 0xfffdf000..0xfffff000 : fixmap
[ 0.000000] * 0xd1000000..0xfffdf000 : vmalloc & ioremap
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS: 512, nr_irqs: 512, preallocated irqs: 16
[ 0.000000] UIC0 (32 IRQ sources) at DCR 0xc0
[ 0.000000] UIC1 (32 IRQ sources) at DCR 0xd0
[ 0.000000] UIC2 (32 IRQ sources) at DCR 0xe0
[ 0.000000] UIC3 (32 IRQ sources) at DCR 0xf0
[ 0.000000] random: get_random_u32 called from 0xc07059e4 with crng_init=0
[ 0.000000] time_init: decrementer frequency = 800.000008 MHz
[ 0.000000] time_init: processor frequency = 800.000008 MHz
[ 0.000019] clocksource: timebase: mask: 0xffffffffffffffff max_cycles: 0xb881274fa3, max_idle_ns: 440795210636 ns
[ 0.010285] clocksource: timebase mult[1400000] shift[24] registered
[ 0.016604] clockevent: decrementer mult[ccccccef] shift[32] cpu[0]
[ 0.022897] pid_max: default: 32768 minimum: 301
[ 0.027564] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.034802] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.046862] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[ 0.056542] futex hash table entries: 256 (order: -1, 3072 bytes, linear)
[ 0.065963] NET: Registered protocol family 16
[ 0.070909] DMA: preallocated 256 KiB pool for atomic allocations
[ 0.078970] 256k L2-cache enabled
[ 0.082314] PCIE0: Port disabled via device-tree
[ 0.087519] PCI: Probing PCI hardware
[ 0.105316] SCSI subsystem initialized
[ 0.109751] libata version 3.00 loaded.
[ 0.114696] workqueue: max_active 576 requested for napi_workq is out of range, clamping between 1 and 512
[ 0.125467] clocksource: Switched to clocksource timebase
[ 0.131517] thermal_sys: Registered thermal governor 'step_wise'
[ 0.131733] NET: Registered protocol family 2
[ 0.142068] IP idents hash table entries: 4096 (order: 3, 32768 bytes, linear)
[ 0.149727] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 4096 bytes, linear)
[ 0.158001] TCP established hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.165597] TCP bind hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.172586] TCP: Hash tables configured (established 2048 bind 2048)
[ 0.178960] UDP hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.185414] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.192453] NET: Registered protocol family 1
[ 0.196759] PCI: CLS 0 bytes, default 32
[ 0.204471] dw_dmac 4bffd0800.dma: DesignWare DMA Controller, 2 channels
[ 0.216070] workingset: timestamp_bits=14 max_order=16 bucket_order=2
[ 0.227826] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.297428] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
[ 0.305846] GPIO line 473 (Enable Reset Button, disable NOR) hogged as output/low
[ 0.314079] Serial: 8250/16550 driver, 16 ports, IRQ sharing enabled
[ 0.322566] printk: console [ttyS0] disabled
[ 0.326819] 4ef600300.serial: ttyS0 at MMIO 0x4ef600300 (irq = 33, base_baud = 462962) is a TI16750
[ 0.335789] printk: console [ttyS0] enabled
[ 0.335789] printk: console [ttyS0] enabled
[ 0.344060] printk: bootconsole [udbg0] disabled
[ 0.344060] printk: bootconsole [udbg0] disabled
[ 0.357357] loop: module loaded
[ 0.360535] Loading iSCSI transport class v2.0-870.
[ 0.371750] sata-dwc 4bffd1000.sata: id 0, controller version 1.91
[ 0.379141] scsi host0: sata-dwc
[ 0.382719] ata1: SATA max UDMA/133 irq 40
[ 0.386971] sata-dwc 4bffd1800.sata: id 0, controller version 1.91
[ 0.394474] scsi host1: sata-dwc
[ 0.397948] ata2: SATA max UDMA/133 irq 41
[ 0.402830] libphy: Fixed MDIO Bus: probed
[ 0.406939] PPC 4xx OCP EMAC driver, version 3.54
[ 0.412056] MAL v2 /plb/mcmal, 1 TX channels, 1 RX channels
[ 0.417828] RGMII /plb/opb/emac-rgmii@ef601500 initialized with MDIO support
[ 0.425031] TAH /plb/opb/emac-tah@ef601350 initialized
[ 0.430471] /plb/opb/emac-rgmii@ef601500: input 0 in rgmii mode
[ 0.436531] libphy: emac_mdio: probed
[ 0.444855] eth0: EMAC-0 /plb/opb/ethernet@ef600c00, MAC 00:90:a9:36:57:dc
[ 0.451768] eth0: found Broadcom BCM50610 PHY (0x01)
[ 0.456818] i2c /dev entries driver
[ 0.460408] booke_wdt: powerpc book-e watchdog driver loaded
[ 0.480925] NET: Registered protocol family 10
[ 0.487121] Segment Routing with IPv6
[ 0.490884] NET: Registered protocol family 17
[ 0.495368] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 0.508282] 8021q: 802.1Q VLAN Support v1.8
[ 0.512529] drmem: No dynamic reconfiguration memory found
[ 0.518483] usb-regulator GPIO handle specifies active low - ignored
[ 0.751677] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 0.757948] ata2: SATA link down (SStatus 0 SControl 300)
[ 0.785693] ata1.00: ATA-8: SAMSUNG HD501LJ, CR100-12, max UDMA7
[ 0.791692] ata1.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 1/32)
[ 0.800772] ata1.00: configured for UDMA/133
[ 0.805431] scsi 0:0:0:0: Direct-Access ATA SAMSUNG HD501LJ 0-12 PQ: 0 ANSI: 5
[ 0.814719] sd 0:0:0:0: [sda] 976773168 512-byte logical blocks: (500 GB/466 GiB)
[ 0.822623] sd 0:0:0:0: [sda] Write Protect is off
[ 0.827424] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 0.832579] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 0.850021] sda: sda1 sda2
[ 0.853909] sd 0:0:0:0: [sda] Attached SCSI disk
[ 0.858718] md: Waiting for all devices to be available before autodetect
[ 0.865503] md: If you don't use raid, use raid=noautodetect
[ 0.871615] md: Autodetecting RAID arrays.
[ 0.875721] md: autorun ...
[ 0.878507] md: ... autorun DONE.
[ 0.890295] EXT4-fs (sda2): warning: mounting unchecked fs, running e2fsck is recommended
[ 0.908277] EXT4-fs (sda2): mounted filesystem without journal. Opts: (null)
[ 0.915380] VFS: Mounted root (ext4 filesystem) on device 8:2.
[ 0.921932] Freeing unused kernel memory: 180K
[ 0.926415] Run /sbin/init as init process
[ 1.022739] init: Console is alive
[ 1.026364] init: - watchdog -
[ 1.068541] random: fast init done
[ 1.076871] kmodloader: loading kernel modules from /etc/modules-boot.d/*
[ 1.102897] usbcore: registered new interface driver usbfs
[ 1.108473] usbcore: registered new interface driver hub
[ 1.113844] usbcore: registered new device driver usb
[ 1.127750] dwc2 4bff80000.usbotg: 4bff80000.usbotg supply vusb_d not found, using dummy regulator
[ 1.136833] dwc2 4bff80000.usbotg: 4bff80000.usbotg supply vusb_a not found, using dummy regulator
[ 1.246961] dwc2 4bff80000.usbotg: DWC OTG Controller
[ 1.252056] dwc2 4bff80000.usbotg: new USB bus registered, assigned bus number 1
[ 1.259483] dwc2 4bff80000.usbotg: irq 36, io mem 0x4bff80000
[ 1.266120] hub 1-0:1.0: USB hub found
[ 1.270114] hub 1-0:1.0: 1 port detected
[ 1.280976] usbcore: registered new interface driver usb-storage
[ 1.287738] kmodloader: done loading kernel modules from /etc/modules-boot.d/*
[ 1.297565] init: - preinit -
[ 1.457790] eth0: link is down
[ 1.470717] random: procd: uninitialized urandom read (4 bytes read)
Press the [f] key and hit [enter] to enter failsafe mode
Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level
[ 5.558632] mount_root: mounting /dev/root
[ 5.568909] EXT4-fs (sda2): re-mounted. Opts: (null)
[ 5.574099] mount_root: loading kmods from internal overlay
[ 5.589824] kmodloader: loading kernel modules from //etc/modules-boot.d/*
[ 5.597445] kmodloader: done loading kernel modules from //etc/modules-boot.d/*
[ 5.776499] block: attempting to load /etc/config/fstab
[ 5.782894] block: extroot: not configured
[ 5.810658] EXT4-fs (sda1): warning: mounting unchecked fs, running e2fsck is recommended
[ 5.843054] EXT4-fs (sda1): mounted filesystem without journal. Opts: (null)
[ 5.851752] urandom-seed: Seeding with /etc/urandom.seed
[ 5.907043] procd: - early -
[ 5.910705] procd: - watchdog -
[ 6.462534] procd: - watchdog -
[ 6.468283] procd: - ubus -
[ 6.485959] random: ubusd: uninitialized urandom read (4 bytes read)
[ 6.521744] random: ubusd: uninitialized urandom read (4 bytes read)
[ 6.528422] random: ubusd: uninitialized urandom read (4 bytes read)
[ 6.536442] procd: - init -
Please press Enter to activate this console.
[ 6.907256] kmodloader: loading kernel modules from /etc/modules.d/*
[ 6.949824] device-mapper: ioctl: 4.41.0-ioctl (2019-09-16) initialised: dm-devel@redhat.com
[ 7.022615] xt_time: kernel timezone is -0000
[ 7.063169] kmodloader: done loading kernel modules from /etc/modules.d/*
[ 7.120090] urngd: v1.0.2 started.
[ 7.229806] random: crng init done
[ 7.233200] random: 6 urandom warning(s) missed due to ratelimiting
[ 10.227611] eth0: link is down
[ 10.245090] br-lan: port 1(eth0) entered blocking state
[ 10.250354] br-lan: port 1(eth0) entered disabled state
[ 10.255822] device eth0 entered promiscuous mode
BusyBox v1.33.1 (2021-08-31 22:20:08 UTC) built-in shell (ash)
_______ ________ __
| |.-----.-----.-----.| | | |.----.| |_
| - || _ | -__| || | | || _|| _|
|_______|| __|_____|__|__||________||__| |____|
|__| W I R E L E S S F R E E D O M
-----------------------------------------------------
OpenWrt 21.02.0, r16279-5cc0535800
-----------------------------------------------------
=== WARNING! =====================================
There is no root password defined on this device!
Use the "passwd" command to set up a new password
in order to prevent unauthorized SSH logins.
--------------------------------------------------
root@OpenWrt:/#
(Check: With DTB #2 I can't find any file containing regulators. Can't boot DTB #1, so can't check there.)
I'm applying these to default-standard-unmodified 21.02.0, so kernel 5.6 5.4
By the way, what I struggle to comprehend is why this only happens on the Duo, not on the Single, as they are virtually the same board. Do their uboots or uboot-envs differ, would that even have any influence on the sata issue?
OpenWrt 19.07 had the same regulators definition in place. My guess is that something broke in the kernel, but I have no idea why the DUO and not the single.
Alright, so where do we go from here? I'm assuming this change to the DTB should go into 21.02 ASAP*, and tested with a 5.10 snapshot. Is there more testing to do, by more people, or will my single point of anecdotal evidence suffice?
In summary: Is there anything I can do to help?
*) Also, is it reasonable/possible/realistic to try to get this into 21.02.0 and have the images recompiled, given that 21.02.1 is nowhere in sight yet?
I'm supposing this was never fixed then 
:
Heads-up!
I've merged a "band-aid" patch to OpenWrt 21.02 that just removes the regulators (#2).
But from my understanding that doesn't help 21.02(.0) much anymore.
I left master/trunk/ "as is" for now. Thing is, there were some updates to the kernel's gpio-regulator code since 4.14 to 5.4 and 5.10. It could be that 4.14's gpio-regulator never worked, or that something needs updating. Anyway, I'll look at the on Saturday.
I posted to the end of that, showing that things are working again.
Not related, this here issue is with the SATA subtarget.
After shapshot switched to 5.10, I took another stab at it. Unfortunately I have to report that the same problem occurs with kernel 5.10:
U-Boot 2009.08-svn54115 (Nov 15 2011 - 10:54:56), Build: 0.0.12
CPU: AMCC PowerPC APM82181 Rev. D at 800 MHz (PLB=200, OPB=100, EBC=100 MHz)
Security support
Bootstrap Option E - Boot ROM Location NOR/SRAM (8 bits)
32 kB I-Cache 32 kB D-Cache
Board: Apollo-3G - APM82181 Board, 2*SATA, 1*USB
I2C: ready
DRAM: Auto calibration 256 MB
FLASH: 512 kB
DTT: 1 FAILED INIT
Net: PHY EC1 Register: 0x2c8c
ppc_4xx_eth0
Type run flash_nfs to mount root filesystem over NFS
p=============================================================================q
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::WWWWWWWWW::::WWWWWWW::::::::WWWWWWW::DDDDDDDDDDDDDDDDD::::::::::::|
|:::::::::::WWWWWWWW::::WWWWWWWW:::::::WWWWWWW::DDDDDDDDDDDDDDDDDDDD::::::::::|
|:::::::::::WWWWWWWW:::WWWWWWWWW::::::WWWWWWW::DDDDDDDDDDDDDDDDDDDDDD:::::::::|
|::::::::::::::::::::::::::::::::::::::::::::::::::::::::::DDDDDDDDDDD::::::::|
|:::::::::::WWWWWWW:::WWWWWWWWWW::::WWWWWWW::DDDDDDDDD:::::::DDDDDDDDD::::::::|
|:::::::::::WWWWWWW::WWWWWWWWWWW:::WWWWWWW::DDDDDDDDD::::::::DDDDDDDDD::::::::|
|:::::::::::WWWWWW::WWWWWW::WWWWW:WWWWWWW::DDDDDDDDDD:::::::DDDDDDDDDD::::::::|
|:::::::::::WWWWWWWWWWWWW:::WWWWWWWWWWWW::DDDDDDDDDD::::::DDDDDDDDDDD:::::::::|
|:::::::::::WWWWWWWWWWWW::::WWWWWWWWWWW::DDDDDDDDDDD:::DDDDDDDDDDDDD::::::::::|
|:::::::::::WWWWWWWWWWW:::::WWWWWWWWWW::DDDDDDDDDDDDDDDDDDDDDDDDDD::::::::::::|
|:::::::::::WWWWWWWWWW::::::WWWWWWWWW::DDDDDDDDDDDDDDDDDDDDDDDDD::::::::::::::|
|:::::::::::WWWWWWWWW:::::::WWWWWWWW::DDDDDDDDDDDDDDDDDDDDDDDD::::::::::::::::|
|:::::::::::WWWWWWWW::::::::WWWWWWW::DDDDDDDDDDDDDDDDDDDD:::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
|:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::|
b=============================================================================d
Hit any key to stop autoboot: 0
USB: OTG-Controller ID(0x4F54) Version(0x290A)
Err detect usb time out hostport.d32 0x00001000
0 USB Device(s) found
scanning bus for storage devices...
0 Storage Device(s) found
** Block device usb 0 not supported
Board is not configured for test. Do normal boot.
----- Checking Boot Partitions -----
SATA DWC initialization 0
init: Waiting for device...
sata_dwc: Device found
scan: Waiting for device...
SATA DWC initialization 1
sata_dwc: Hard Disk not found. Status = 0x7f
** Bad partition 1 **
SATA DWC initialization 0
init: Waiting for device...
sata_dwc: Device found
scan: Waiting for device...
SATA DWC initialization 1
sata_dwc: Hard Disk not found. Status = 0x7f
Loading file "/boot/boot.scr" from sata device 0:1 (hda1)
622 bytes read
0:1
## Executing script at 00100000
SATA DWC initialization 0
init: Waiting for device...
sata_dwc: Device found
scan: Waiting for device...
SATA DWC initialization 1
sata_dwc: Hard Disk not found. Status = 0x7f
Loading file "/boot/uImage" from sata device 0:1 (hda1)
4287817 bytes read
Loading file "/boot/apollo3g.dtb" from sata device 0:1 (hda1)
16384 bytes read
Loaded part 1
## Booting kernel from Legacy Image at 01000000 ...
Image Name: POWERPC OpenWrt Linux-5.10.72
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 4287753 Bytes = 4.1 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Flattened Device Tree blob at 01800000
Booting using the fdt blob at 0x1800000
Uncompressing Kernel Image ... OK
Loading Device Tree to 00ff9000, end 00ffffff ... OK
[ 0.000000] printk: bootconsole [udbg0] enabled
[ 0.000000] Linux version 5.10.72 (builder@buildhost) (powerpc-openwrt-linux-musl-gcc (OpenWrt GCC 11.2.0 r17742-977bf5e980) 11.2.0, GNU ld (GNU Binutils) 2.37) #0 Sun Oct 10 23:05:54 2021
[ 0.000000] Using PowerPC 44x Platform machine description
[ 0.000000] -----------------------------------------------------
[ 0.000000] phys_mem_size = 0x10000000
[ 0.000000] dcache_bsize = 0x20
[ 0.000000] icache_bsize = 0x20
[ 0.000000] cpu_features = 0x0000000000000120
[ 0.000000] possible = 0x0000000040000120
[ 0.000000] always = 0x0000000000000120
[ 0.000000] cpu_user_features = 0x8c008000 0x00000000
[ 0.000000] mmu_features = 0x00000008
[ 0.000000] -----------------------------------------------------
[ 0.000000] Top of RAM: 0x10000000, Total RAM: 0x10000000
[ 0.000000] Memory hole size: 0MB
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] On node 0 totalpages: 65536
[ 0.000000] Normal zone: 576 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 65536 pages, LIFO batch:15
[ 0.000000] MMU: Allocated 1088 bytes of context maps for 255 contexts
[ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[ 0.000000] pcpu-alloc: [0] 0
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 64960
[ 0.000000] Kernel command line: root=/dev/sda2 rw rootfstype=squashfs,ext4 console=ttyS0,115200
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes, linear)
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] Memory: 249952K/262144K available (7096K kernel code, 668K rwdata, 1408K rodata, 184K init, 223K bss, 12192K reserved, 0K cma-reserved)
[ 0.000000] Kernel virtual memory layout:
[ 0.000000] * 0xffbdf000..0xfffff000 : fixmap
[ 0.000000] * 0xd1000000..0xffbdf000 : vmalloc & ioremap
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS: 512, nr_irqs: 512, preallocated irqs: 16
[ 0.000000] UIC0 (32 IRQ sources) at DCR 0xc0
[ 0.000000] UIC1 (32 IRQ sources) at DCR 0xd0
[ 0.000000] UIC2 (32 IRQ sources) at DCR 0xe0
[ 0.000000] UIC3 (32 IRQ sources) at DCR 0xf0
[ 0.000000] random: get_random_u32 called from start_kernel+0x2e0/0x3f0 with crng_init=0
[ 0.000000] time_init: decrementer frequency = 800.000008 MHz
[ 0.000000] time_init: processor frequency = 800.000008 MHz
[ 0.000018] clocksource: timebase: mask: 0xffffffffffffffff max_cycles: 0xb881274fa3, max_idle_ns: 440795210636 ns
[ 0.010285] clocksource: timebase mult[1400000] shift[24] registered
[ 0.016603] clockevent: decrementer mult[ccccccef] shift[32] cpu[0]
[ 0.022925] pid_max: default: 32768 minimum: 301
[ 0.027616] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.034829] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.044443] dyndbg: Ignore empty _ddebug table in a CONFIG_DYNAMIC_DEBUG_CORE build
[ 0.054724] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.064487] futex hash table entries: 256 (order: -1, 3072 bytes, linear)
[ 0.074673] NET: Registered protocol family 16
[ 0.079591] DMA: preallocated 128 KiB GFP_KERNEL pool for atomic allocations
[ 0.087151] thermal_sys: Registered thermal governor 'step_wise'
[ 0.088769] 256k L2-cache enabled
[ 0.098074] PCIE0: Port disabled via device-tree
[ 0.103367] PCI: Probing PCI hardware
[ 0.125117] SCSI subsystem initialized
[ 0.129875] libata version 3.00 loaded.
[ 0.136389] clocksource: Switched to clocksource timebase
[ 0.142590] NET: Registered protocol family 2
[ 0.146994] IP idents hash table entries: 4096 (order: 3, 32768 bytes, linear)
[ 0.154588] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 4096 bytes, linear)
[ 0.162878] TCP established hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.170462] TCP bind hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.177447] TCP: Hash tables configured (established 2048 bind 2048)
[ 0.183827] UDP hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.190280] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.197311] NET: Registered protocol family 1
[ 0.201597] PCI: CLS 0 bytes, default 32
[ 0.230385] dw_dmac 4bffd0800.dma: DesignWare DMA Controller, 2 channels
[ 0.247275] workingset: timestamp_bits=14 max_order=16 bucket_order=2
[ 0.257647] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.432778] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
[ 0.440914] gpio-473 (Enable Reset Button, disable NOR): hogged as output/low
[ 0.448915] Serial: 8250/16550 driver, 16 ports, IRQ sharing enabled
[ 0.457560] printk: console [ttyS0] disabled
[ 0.461815] 4ef600300.serial: ttyS0 at MMIO 0x4ef600300 (irq = 33, base_baud = 462962) is a TI16750
[ 0.470792] printk: console [ttyS0] enabled
[ 0.470792] printk: console [ttyS0] enabled
[ 0.479052] printk: bootconsole [udbg0] disabled
[ 0.479052] printk: bootconsole [udbg0] disabled
[ 0.501379] loop: module loaded
[ 0.504534] Loading iSCSI transport class v2.0-870.
[ 0.513292] sata-dwc 4bffd1000.sata: id 0, controller version 1.91
[ 0.521060] scsi host0: sata-dwc
[ 0.524549] ata1: SATA max UDMA/133 irq 40
[ 0.528904] sata-dwc 4bffd1800.sata: id 0, controller version 1.91
[ 0.537322] scsi host1: sata-dwc
[ 0.540756] ata2: SATA max UDMA/133 irq 41
[ 0.545986] libphy: Fixed MDIO Bus: probed
[ 0.550120] PPC 4xx OCP EMAC driver, version 3.54
[ 0.555233] MAL v2 /plb/mcmal, 1 TX channels, 1 RX channels
[ 0.561018] RGMII /plb/opb/emac-rgmii@ef601500 initialized with MDIO support
[ 0.568217] TAH /plb/opb/emac-tah@ef601350 initialized
[ 0.573648] /plb/opb/emac-rgmii@ef601500: input 0 in rgmii-id mode
[ 0.581337] libphy: emac_mdio: probed
[ 0.593441] eth0: EMAC-0 /plb/opb/ethernet@ef600c00, MAC 00:90:a9:b6:0b:ca
[ 0.600365] eth0: found Broadcom BCM50610 PHY (0x01)
[ 0.605488] i2c /dev entries driver
[ 0.609084] booke_wdt: powerpc book-e watchdog driver loaded
[ 0.629648] NET: Registered protocol family 10
[ 0.635456] Segment Routing with IPv6
[ 0.639234] NET: Registered protocol family 17
[ 0.643707] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 0.656629] 8021q: 802.1Q VLAN Support v1.8
[ 0.660880] drmem: No dynamic reconfiguration memory found
[ 0.867648] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 0.919425] ata2: SATA link down (SStatus 0 SControl 300)
[ 5.876405] ata1.00: qc timeout (cmd 0xec)
[ 5.880490] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
[ 6.217635] ata1: SATA link down (SStatus 0 SControl 300)
[ 6.223052] md: Waiting for all devices to be available before autodetect
[ 6.229823] md: If you don't use raid, use raid=noautodetect
[ 6.235460] md: Autodetecting RAID arrays.
[ 6.239542] md: autorun ...
[ 6.242328] md: ... autorun DONE.
[ 6.246066] /dev/root: Can't open blockdev
[ 6.250184] VFS: Cannot open root device "sda2" or unknown-block(0,0): error -6
[ 6.257469] Please append a correct "root=" boot option; here are the available partitions:
[ 6.265794] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 6.274026] Rebooting in 1 seconds..
After shapshot switched to 5.10, I took another stab at it. Unfortunately I have to report that the same problem occurs with kernel 5.10:
thanks. I have the feeling that the MBL Single and Duo are indeed different designs.... and that I'm missing something in plain sight.
I am completely useless when it comes to deciphering DTS files
[Edit: original post removed to not add noise] ... and so I was barking up the wrong tree.
So, am I completely stupid in asking if it's correct that both sata ports have an identical
sata-port@0andreg = <0>?
That I can hopefully explain. Let's look at the bootlog (from your post above):
[ 0.513292] sata-dwc 4bffd1000.sata: id 0, controller version 1.91
[ 0.521060] scsi host0: sata-dwc
[ 0.524549] ata1: SATA max UDMA/133 irq 40
[ 0.528904] sata-dwc 4bffd1800.sata: id 0, controller version 1.91
[ 0.537322] scsi host1: sata-dwc
[ 0.540756] ata2: SATA max UDMA/133 irq 41
SATA0 and SATA1 are two independent SATA-controllers (each has its own memory window and IRQ). So each controller there has one port... and because developers start counting at 0, that's why there are two reg = <0>; for drive1: and drive0: (these are both just labels).
Note: these driveX: sata-port@0 nodes are mostly syntactic sugar and don't really have any influence about the problem here.
However, I think I found something in regards to the regulator. If it is indeed just a missing property... then it really was hidden in plain sight. I'll get around to this later
with a new .dtb.
Here's a .dtb (this time no uuencode foolery, you should be able to get the file through a github gist.
https://gist.github.com/chunkeey/a744b6e28b6c018f5fc1cea82d6380e8#file-openwrt-apm821xx-sata-wd_mybooklive-apollo3g-dtb
(Preview looks broken, but it should be the real file. sha256sum of openwrt-apm821xx-sata-wd_mybooklive-apollo3g.dtb is 720d787a4ac7ce51dc472abd87c4119d17dee5fa50feff2164ec136bbb75996d )
also: I found the reason why this worked with 19.07: CONFIG_REGULATOR was not
set, so the DTS entries were ignored. 
As for the fix, your logs hinted with the following messages what was wrong:
[ 0.531599] sata1-regulator GPIO handle specifies active low - ignored
[ 0.538391] sata0-regulator GPIO handle specifies active low - ignored
I changed the GPIO polarity and set the enable-active-high;property in my patch (which produced the .dtb above):
Cheers,
Christian
Bingo! With this DTB it boots up fine, you have been right on the money.
Honest to god, I was looking at GPIO_ACTIVE_LOW and I wondered if it could be related to the issue since the drives audibly powered down, suggesting (in my mind) that the SATA port was turned off. I just didn't dare to suggest it since, again, I'm patently useless when it comes to DTSsa and it worked with 19.07 (and now we know why.)
So, thank you! You can add me as tested-by if you like.
Edit/addendum: From your commit message
IMHO no. As far as I can see, the MBL Single just ignores the regulator setting it doesn't have. The same disk boots up fine on an MBL Single as well:
[ 0.867775] ata1: SATA link down (SStatus 0 SControl 300)
[ 0.918739] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 0.956740] ata2.00: ATA-8: SAMSUNG HD501LJ, CR100-12, max UDMA7
[ 0.962733] ata2.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 1/32)
[ 0.971825] ata2.00: configured for UDMA/133
[ 0.976462] scsi 1:0:0:0: Direct-Access ATA SAMSUNG HD501LJ 0-12 PQ: 0 ANSI: 5
[ 0.985724] sd 1:0:0:0: [sda] 976773168 512-byte logical blocks: (500 GB/466 GiB)
[ 0.993901] sd 1:0:0:0: [sda] Write Protect is off
[ 0.998704] sd 1:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 1.003832] sd 1:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 1.023103] sda: sda1 sda2
[ 1.027084] sd 1:0:0:0: [sda] Attached SCSI disk
(Also I would really miss to be able to just move a disk between an MBL Single and a Duo.)
Pinging @chunkeey because time sensitivity: It seems 21.02.1 may get tagged tomorrow, does it make sense to rush the fix in to "properly" handle the issue or can 21.02.1 remain on the "band-aid" fix for the time being?
After the long time that was required for this "simple and proper fix", I would say: "let's get some real experience with these (SATA) regulators first.". But then, I didn't see/hear complains until 21.02 got released. I hope that the issue is now addressed, but I can't say it for certain.
I suspect ppl are not eager to update their MBL Duos. Understandably so, once they run they run, and they are not edge routers after all and security updates are not as important.
But yes, I am a bit puzzled by the lack of feedback, too. One would imagine that, since 21.02.0 definitely doesn't work on MBL Duo, someone would speak up. But this thread is basically a conversation between the two of us, and I have to believe that I am not the only one using an MBL Duo. 
I guess the band-aid fix will (have to) do for 21.02.1.
The warning message at the device page has kept me from updating my MBL Duo. I've been checking this thread now and then. I wanted to let you know that there's at least one person out there waiting for a proper update.
21.02.1 has just been released and includes the "band aid" fix for MBL Duo. In the meantime, the "proper" fix has been merged to snapshot.