[PATCH 0/3] Add UFS Host driver support for SpacemiT K3 SoC

[Anirudh Srinivasan]

Hi Yixun,

On Thu, Jul 02, 2026 at 02:31:34AM +0000, Yixun Lan wrote:
> This series try to add UFS support for SpacemiT K3 SoC, the controller
> components consists of System Bus Interface Unit, UFS Host Controller
> Interface, UFS Transport Protocol Layer, UFS Host Registers, Device
> Management Entity (DME), Transport Layer, Network Layer, Data Link
> Layer, PHY Adapter Layer, and M-PHY Interface. A more detail functional
> block diagram can be found in SpacemiT website, chapter 9.7.3 [1]
> 
> Please note, in order to test this driver, the UFS clock driver[2] here
> should be applied first as a prerequisite patch.
> 
> One known issue is that the device will occasionally raise BKOPS interrupt
> when doing some high load test, log from dmesg shows
> 
> [  806.710763] ufshcd-spacemit c0e00000.ufshc: ufshcd_bkops_exception_event_handler: device raised urgent BKOPS exception for bkops status 1
> 
> Link: https://spacemit.com/community/document/info?nodepath=hardware/key_stone/k3/k3_docs/k3_usermanual/09_memory_storage.md&lang=en [1]
> Link: https://lore.kernel.org/all/20260630-06-clk-ufs-support-v1-0-cf7521d1d0fe@kernel.org/ [2]
> Signed-off-by: Yixun Lan <dlan at kernel.org>

I see this during probe on a k3-pico-itx. Does the UFS chip on board
have an RPMB block on it? Is this error of any concern.

[    5.957864] ufshcd-spacemit c0e00000.ufshc: ufshcd_scsi_add_wlus: BOOT WLUN not found
[    5.963319] bus_add_device: cannot add device 'ufs_rpmb0' to unregistered bus 'ufs_rpmb'
[    5.971155] ufshcd-spacemit c0e00000.ufshc: Failed to register UFS RPMB device 0

Regards
Anirudh Srinivasan

> ---
> Yixun Lan (3):
>       scsi: ufs: spacemit: dt-bindings: Add UFS controller for K3 SoC
>       scsi: ufs: spacemit: k3: Add UFS Host Controller driver
>       riscv: dts: spacemit: k3: Add UFS support
> 
>  .../devicetree/bindings/ufs/spacemit,k3-ufshc.yaml |  54 ++
>  arch/riscv/boot/dts/spacemit/k3-com260-ifx.dts     |   4 +
>  arch/riscv/boot/dts/spacemit/k3-pico-itx.dts       |   4 +
>  arch/riscv/boot/dts/spacemit/k3.dtsi               |  13 +
>  drivers/ufs/host/Kconfig                           |  12 +
>  drivers/ufs/host/Makefile                          |   1 +
>  drivers/ufs/host/ufs-spacemit.c                    | 931 +++++++++++++++++++++
>  drivers/ufs/host/ufs-spacemit.h                    |  90 ++
>  8 files changed, 1109 insertions(+)
> ---
> base-commit: dc59e4fea9d83f03bad6bddf3fa2e52491777482
> change-id: 20260605-08-k3-ufs-support-c8b308e415e2
> 
> Best regards,
> --  
> Yixun Lan <dlan at kernel.org>
>