[PATCH 0/2] ufs: Add support for setting bRefClkFreq attribute

[Bryan Brattlof]

On August 27, 2025 thus sayeth Jared McArthur:
> Currently, U-Boot doesn't set the bRefClkFreq attribute before
> changing power mode of the UFS device. If there is a difference
> between the UFS device and the host controller, all commands will fail
> after switching to high speed.
> 
> This behavior is rarely observed, because Linux sets the bRefClkFreq
> attribute on probe, and the bRefClkFreq is a persistent attribute. In
> other words, once Linux has booted once, the issue will never be seen.
> 
> If trying to provision and boot from an unprovisioned UFS device,
> U-Boot will fail. Fix this by adding support for setting the
> bRefClkFreq attribute.
> 
> Jared McArthur (2):
>   ufs: Add support for sending UFS attribute requests
>   ufs: Add bRefClkFreq attribute setting
> 
>  drivers/ufs/ufs.c | 184 ++++++++++++++++++++++++++++++++++++++++++++++
>  drivers/ufs/ufs.h |  10 +++
>  2 files changed, 194 insertions(+)

Reviewed-by: Bryan Brattlof <bb at ti.com>

~Bryan