Re: [PATCH v7 0/2] Add UFS Host driver support for SpacemiT K3 SoC

[Trevor Gamblin]

On Thu Oct 1, 2026 at 11:10 PM EDT, 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]
>
> The DTS patch has been dropped in this series [2], and will send
> in separate series once this patch accepted. For people who want to
> test UFS driver, please grab the DT patch from version v5 [3].

Hi,

I've been testing this series (and the DT patch from v5) successfully using a
v7.3 kernel in Yocto's meta-riscv layer. It's been working well with fastboot
flash in our nightly CI. An example:

https://forgejo.baylibre.com/tgamblin/boardgarden/actions/runs/827/jobs/9/attempt/1

For both patches:

Tested-by: Trevor Gamblin <tgamblin@xxxxxxxxxxxx>
>
> 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/20260918-belligerent-succinct-kraken-7fa592@quoll/ [2]
> Link: https://lore.kernel.org/all/20260916-08-k3-ufs-support-v5-3-1f5d71f1027d@xxxxxxxxxx/ [3]
> Signed-off-by: Yixun Lan <dlan@xxxxxxxxxx>
> ---
> Changes in v7:
> - check err return value of ufs_spacemit_quirk_host_pa_saveconfigtime()
> - Link to v6: https://patch.msgid.link/20260921-08-k3-ufs-support-v6-0-3479768a2299@xxxxxxxxxx
>
> Changes in v6:
> - drop unused macro and dev_req_params
> - use global PX_xx macros
> - fix axi clock name
> - drop dts patch
> - collect tags
> - Link to v5: https://patch.msgid.link/20260916-08-k3-ufs-support-v5-0-1f5d71f1027d@xxxxxxxxxx
>
> Changes in v5:
> - adjust clock names
> - add runtime power support
> - collect tags
> - Link to v4: https://patch.msgid.link/20260908-08-k3-ufs-support-v4-0-22aa2bd97d3b@xxxxxxxxxx
>
> Changes in v4:
> - fix clock and reset settings
> - drop function which retrieve value of tx_lanes
> - propagate return error of ufs_spacemit_dme_set()
> - check return value ufs_spacemit_check_hibern8()
> - drop call to ufshcd_vops_phy_initialization()
> - handle compiling warning if CONFIG_OF not enabled
>  add __maybe_unused to ufs_spacemit_of_match
> - Link to v3: https://patch.msgid.link/20260806-08-k3-ufs-support-v3-0-037fb322acdb@xxxxxxxxxx
>
> Changes in v3:
> - collect tags
> - fix dt-binding warning reported-by sashiko
> - fix low freq in opp-2 table
> - fix err checking in check_hibern8()
> - propagate err code in link_startup_notify()
> - update documents for event_notify()
> - ufs clock driver is merged into v7.3-rc1, update cover letter
> - Link to v2: https://patch.msgid.link/20260725-08-k3-ufs-support-v2-0-45036a2a2418@xxxxxxxxxx
>
> Changes in v2:
> - fix missing interrupts property
> - move ufs node to k3-com260.dtsi
> - convert freq-table-hz to operating-points-v2
> - rework reset_control, fix header and drop global variable
> - drop dump_host_regs() debug interface
> - converge and refactor dme_set() operations
> - massive reduce of busy delay() loops
> - drop vendor specific hce_enable_notify(), fallback to default
> - drop unused member from struct ufs_spacemit_host
> - add COMPILE_TEST support to Kconfig
> - comment style fix
> - Link to v1: https://patch.msgid.link/20260702-08-k3-ufs-support-v1-0-1a64a3ab128f@xxxxxxxxxx
>
> ---
> Yixun Lan (2):
>       scsi: ufs: spacemit: dt-bindings: Add UFS controller for K3 SoC
>       scsi: ufs: spacemit: k3: Add UFS Host Controller driver
>
>  .../devicetree/bindings/ufs/spacemit,k3-ufshc.yaml |  56 ++
>  drivers/ufs/host/Kconfig                           |  12 +
>  drivers/ufs/host/Makefile                          |   1 +
>  drivers/ufs/host/ufs-spacemit.c                    | 652 +++++++++++++++++++++
>  drivers/ufs/host/ufs-spacemit.h                    |  77 +++
>  5 files changed, 798 insertions(+)
> ---
> base-commit: cee9395acd8043be0644b25c34bfa86623f2b935
> change-id: 20260605-08-k3-ufs-support-c8b308e415e2
>
> Best regards,
> --  
> Yixun Lan <dlan@xxxxxxxxxx>
>
>
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