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From:   Arnd Bergmann <arnd@arndb.de>
Date:   Mon, 2 May 2022 21:21:05 +0200
Message-ID: <CAK8P3a0ogn1wgPBDHkT=Fb8ufA+y8Ax1Qov2-vRXfC08QqnrQA@mail.gmail.com>
Subject: Re: [PATCH v2 00/48] ARM: PXA multiplatform support
To:     Guenter Roeck <linux@roeck-us.net>
Cc:     Arnd Bergmann <arnd@arndb.de>,
        Robert Jarzmik <robert.jarzmik@free.fr>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Daniel Mack <daniel@zonque.org>,
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On Mon, May 2, 2022 at 6:26 PM Guenter Roeck <linux@roeck-us.net> wrote:
>
> With v5.18-rc1-49-gcb813018b5c1, I still get:
>
> [    0.797668] RAMDISK: Couldn't find valid RAM disk image starting at 0.
> [    0.805262] /dev/root: Can't open blockdev
> [    0.805487] VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6
> [    0.805674] Please append a correct "root=" boot option; here are the available partitions:
>
> when trying to boot z2 from initrd.
>
> The other problems are gone.

Ok, progress!

What is your qemu command line? I see that z2 has no pcmcia device, so
I tried booting
from MMC, but this already fails with 5.18-rc1 without any of my
patches, giving me

[    0.697481] Creating 3 MTD partitions on "physmap-flash":
[    0.698161] 0x000000000000-0x000000040000 : "U-Boot Bootloader"
[    0.702815] 0x000000040000-0x000000060000 : "U-Boot Environment"
[    0.706541] 0x000000060000-0x000000800000 : "Flash"
[    0.718066] pxa2xx-mci pxa2xx-mci.0: incomplete constraints, dummy
supplies not allowed
[    0.718501] pxa2xx-mci pxa2xx-mci.0: incomplete constraints, dummy
supplies not allowed

Do  you have MMC or some other rootfs working without my patch series?

     Arnd