[PATCH v4 5/6] mmc: bcmstb: Add support for bcm2712 SD controller

[Stefan Wahren]

Hi Ivan,

Am 10.01.24 um 13:29 schrieb Ivan T. Ivanov:
> Borrow SD quirks from vendor Linux driver.
>
> "BCM2712 unfortunately carries with it a perennial bug with the SD
> controller register interface present on previous chips (2711/2709/2708).
> Accesses must be dword-sized and a read-modify-write cycle to the 32-bit
> registers containing the COMMAND, TRANSFER_MODE, BLOCK_SIZE and
> BLOCK_COUNT registers tramples the upper/lower 16 bits of data written.
> BCM2712 does not seem to need the extreme delay between each write as on
> previous chips, just the serialisation of writes to these registers in a
> single 32-bit operation."
>
> Signed-off-by: Ivan T. Ivanov <iivanov at suse.de>
did you noticed this commit/pull request?

https://github.com/raspberrypi/linux/pull/5842/commits/3c9d840dc933cfb13a77fd3c03356ee4adacc30b