Hello,

the objective of this series is to make tee driver stop using callbacks
in struct device_driver. These were superseded by bus methods in 2006
(commit 594c8281f905 ("[PATCH] Add bus_type probe, remove, shutdown
methods.")) but nobody cared to convert all subsystems accordingly.

Here the tee drivers are converted. The first commit is somewhat
unrelated, but simplifies the conversion (and the drivers). It
introduces driver registration helpers that care about setting the bus
and owner. (The latter is missing in all drivers, so by using these
helpers the drivers become more correct.)

v1 of this series is available at
https://lore.kernel.org/all/cover.1765472125.git.u.kleine-koenig@baylibre.com

Changes since v1:

 - rebase to v6.19-rc1 (no conflicts)
 - add tags received so far
 - fix whitespace issues pointed out by Sumit Garg
 - fix shutdown callback to shutdown and not remove

As already noted in v1's cover letter, this series should go in during a
single merge window as there are runtime warnings when the series is
only applied partially. Sumit Garg suggested to apply the whole series
via Jens Wiklander's tree.
If this is done the dependencies in this series are honored, in case the
plan changes: Patches #4 - #17 depend on the first two.

Note this series is only build tested.

Uwe Kleine-König (17):
  tee: Add some helpers to reduce boilerplate for tee client drivers
  tee: Add probe, remove and shutdown bus callbacks to tee_client_driver
  tee: Adapt documentation to cover recent additions
  hwrng: optee - Make use of module_tee_client_driver()
  hwrng: optee - Make use of tee bus methods
  rtc: optee: Migrate to use tee specific driver registration function
  rtc: optee: Make use of tee bus methods
  efi: stmm: Make use of module_tee_client_driver()
  efi: stmm: Make use of tee bus methods
  firmware: arm_scmi: optee: Make use of module_tee_client_driver()
  firmware: arm_scmi: Make use of tee bus methods
  firmware: tee_bnxt: Make use of module_tee_client_driver()
  firmware: tee_bnxt: Make use of tee bus methods
  KEYS: trusted: Migrate to use tee specific driver registration
    function
  KEYS: trusted: Make use of tee bus methods
  tpm/tpm_ftpm_tee: Make use of tee specific driver registration
  tpm/tpm_ftpm_tee: Make use of tee bus methods

 Documentation/driver-api/tee.rst             | 18 +----
 drivers/char/hw_random/optee-rng.c           | 26 ++----
 drivers/char/tpm/tpm_ftpm_tee.c              | 31 +++++---
 drivers/firmware/arm_scmi/transports/optee.c | 32 +++-----
 drivers/firmware/broadcom/tee_bnxt_fw.c      | 30 ++-----
 drivers/firmware/efi/stmm/tee_stmm_efi.c     | 25 ++----
 drivers/rtc/rtc-optee.c                      | 27 ++-----
 drivers/tee/tee_core.c                       | 84 ++++++++++++++++++++
 include/linux/tee_drv.h                      | 12 +++
 security/keys/trusted-keys/trusted_tee.c     | 17 ++--
 10 files changed, 164 insertions(+), 138 deletions(-)

base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
-- 
2.47.3

Hi Uwe,

On 15/12/2025 14:16, Uwe Kleine-König wrote:
> Hello,
> 
> the objective of this series is to make tee driver stop using callbacks
> in struct device_driver. These were superseded by bus methods in 2006
> (commit 594c8281f905 ("[PATCH] Add bus_type probe, remove, shutdown
> methods.")) but nobody cared to convert all subsystems accordingly.
> 
> Here the tee drivers are converted. The first commit is somewhat
> unrelated, but simplifies the conversion (and the drivers). It
> introduces driver registration helpers that care about setting the bus
> and owner. (The latter is missing in all drivers, so by using these
> helpers the drivers become more correct.)
> 
> v1 of this series is available at
> https://lore.kernel.org/all/cover.1765472125.git.u.kleine-koenig@baylibre.com
> 
> Changes since v1:
> 
>   - rebase to v6.19-rc1 (no conflicts)
>   - add tags received so far
>   - fix whitespace issues pointed out by Sumit Garg
>   - fix shutdown callback to shutdown and not remove
> 
> As already noted in v1's cover letter, this series should go in during a
> single merge window as there are runtime warnings when the series is
> only applied partially. Sumit Garg suggested to apply the whole series
> via Jens Wiklander's tree.
> If this is done the dependencies in this series are honored, in case the
> plan changes: Patches #4 - #17 depend on the first two.
> 
> Note this series is only build tested.
> 
> Uwe Kleine-König (17):
>    tee: Add some helpers to reduce boilerplate for tee client drivers
>    tee: Add probe, remove and shutdown bus callbacks to tee_client_driver
>    tee: Adapt documentation to cover recent additions
>    hwrng: optee - Make use of module_tee_client_driver()
>    hwrng: optee - Make use of tee bus methods
>    rtc: optee: Migrate to use tee specific driver registration function
>    rtc: optee: Make use of tee bus methods
>    efi: stmm: Make use of module_tee_client_driver()
>    efi: stmm: Make use of tee bus methods
>    firmware: arm_scmi: optee: Make use of module_tee_client_driver()
>    firmware: arm_scmi: Make use of tee bus methods
>    firmware: tee_bnxt: Make use of module_tee_client_driver()
>    firmware: tee_bnxt: Make use of tee bus methods
>    KEYS: trusted: Migrate to use tee specific driver registration
>      function
>    KEYS: trusted: Make use of tee bus methods
>    tpm/tpm_ftpm_tee: Make use of tee specific driver registration
>    tpm/tpm_ftpm_tee: Make use of tee bus methods


On the next-20260105 I am seeing the following warnings ...

  WARNING KERN Driver 'optee-rng' needs updating - please use bus_type methods
  WARNING KERN Driver 'scmi-optee' needs updating - please use bus_type methods
  WARNING KERN Driver 'tee_bnxt_fw' needs updating - please use bus_type methods

I bisected the first warning and this point to the following
commit ...

# first bad commit: [a707eda330b932bcf698be9460e54e2f389e24b7] tee: Add some helpers to reduce boilerplate for tee client drivers

I have not bisected the others, but guess they are related
to this series. Do you observe the same?

Thanks
Jon

-- 
nvpublic

Hi Jon,

On Tue, Jan 6, 2026 at 10:40 AM Jon Hunter <jonathanh@nvidia.com> wrote:
>
> Hi Uwe,
>
> On 15/12/2025 14:16, Uwe Kleine-König wrote:
> > Hello,
> >
> > the objective of this series is to make tee driver stop using callbacks
> > in struct device_driver. These were superseded by bus methods in 2006
> > (commit 594c8281f905 ("[PATCH] Add bus_type probe, remove, shutdown
> > methods.")) but nobody cared to convert all subsystems accordingly.
> >
> > Here the tee drivers are converted. The first commit is somewhat
> > unrelated, but simplifies the conversion (and the drivers). It
> > introduces driver registration helpers that care about setting the bus
> > and owner. (The latter is missing in all drivers, so by using these
> > helpers the drivers become more correct.)
> >
> > v1 of this series is available at
> > https://lore.kernel.org/all/cover.1765472125.git.u.kleine-koenig@baylibre.com
> >
> > Changes since v1:
> >
> >   - rebase to v6.19-rc1 (no conflicts)
> >   - add tags received so far
> >   - fix whitespace issues pointed out by Sumit Garg
> >   - fix shutdown callback to shutdown and not remove
> >
> > As already noted in v1's cover letter, this series should go in during a
> > single merge window as there are runtime warnings when the series is
> > only applied partially. Sumit Garg suggested to apply the whole series
> > via Jens Wiklander's tree.
> > If this is done the dependencies in this series are honored, in case the
> > plan changes: Patches #4 - #17 depend on the first two.
> >
> > Note this series is only build tested.
> >
> > Uwe Kleine-König (17):
> >    tee: Add some helpers to reduce boilerplate for tee client drivers
> >    tee: Add probe, remove and shutdown bus callbacks to tee_client_driver
> >    tee: Adapt documentation to cover recent additions
> >    hwrng: optee - Make use of module_tee_client_driver()
> >    hwrng: optee - Make use of tee bus methods
> >    rtc: optee: Migrate to use tee specific driver registration function
> >    rtc: optee: Make use of tee bus methods
> >    efi: stmm: Make use of module_tee_client_driver()
> >    efi: stmm: Make use of tee bus methods
> >    firmware: arm_scmi: optee: Make use of module_tee_client_driver()
> >    firmware: arm_scmi: Make use of tee bus methods
> >    firmware: tee_bnxt: Make use of module_tee_client_driver()
> >    firmware: tee_bnxt: Make use of tee bus methods
> >    KEYS: trusted: Migrate to use tee specific driver registration
> >      function
> >    KEYS: trusted: Make use of tee bus methods
> >    tpm/tpm_ftpm_tee: Make use of tee specific driver registration
> >    tpm/tpm_ftpm_tee: Make use of tee bus methods
>
>
> On the next-20260105 I am seeing the following warnings ...
>
>   WARNING KERN Driver 'optee-rng' needs updating - please use bus_type methods
>   WARNING KERN Driver 'scmi-optee' needs updating - please use bus_type methods
>   WARNING KERN Driver 'tee_bnxt_fw' needs updating - please use bus_type methods
>
> I bisected the first warning and this point to the following
> commit ...
>
> # first bad commit: [a707eda330b932bcf698be9460e54e2f389e24b7] tee: Add some helpers to reduce boilerplate for tee client drivers
>
> I have not bisected the others, but guess they are related
> to this series. Do you observe the same?

Yes, I see the same.

I'm sorry, I didn't realize that someone might bisect this when I took
only a few of the patches into next. I've applied all the patches in
this series now.

Thanks,
Jens

Hi,

On Mon, Dec 15, 2025 at 3:17 PM Uwe Kleine-König
<u.kleine-koenig@baylibre.com> wrote:
>
> Hello,
>
> the objective of this series is to make tee driver stop using callbacks
> in struct device_driver. These were superseded by bus methods in 2006
> (commit 594c8281f905 ("[PATCH] Add bus_type probe, remove, shutdown
> methods.")) but nobody cared to convert all subsystems accordingly.
>
> Here the tee drivers are converted. The first commit is somewhat
> unrelated, but simplifies the conversion (and the drivers). It
> introduces driver registration helpers that care about setting the bus
> and owner. (The latter is missing in all drivers, so by using these
> helpers the drivers become more correct.)
>
> v1 of this series is available at
> https://lore.kernel.org/all/cover.1765472125.git.u.kleine-koenig@baylibre.com
>
> Changes since v1:
>
>  - rebase to v6.19-rc1 (no conflicts)
>  - add tags received so far
>  - fix whitespace issues pointed out by Sumit Garg
>  - fix shutdown callback to shutdown and not remove
>
> As already noted in v1's cover letter, this series should go in during a
> single merge window as there are runtime warnings when the series is
> only applied partially. Sumit Garg suggested to apply the whole series
> via Jens Wiklander's tree.
> If this is done the dependencies in this series are honored, in case the
> plan changes: Patches #4 - #17 depend on the first two.
>
> Note this series is only build tested.
>
> Uwe Kleine-König (17):
>   tee: Add some helpers to reduce boilerplate for tee client drivers
>   tee: Add probe, remove and shutdown bus callbacks to tee_client_driver
>   tee: Adapt documentation to cover recent additions
>   hwrng: optee - Make use of module_tee_client_driver()
>   hwrng: optee - Make use of tee bus methods
>   rtc: optee: Migrate to use tee specific driver registration function
>   rtc: optee: Make use of tee bus methods
>   efi: stmm: Make use of module_tee_client_driver()
>   efi: stmm: Make use of tee bus methods
>   firmware: arm_scmi: optee: Make use of module_tee_client_driver()
>   firmware: arm_scmi: Make use of tee bus methods
>   firmware: tee_bnxt: Make use of module_tee_client_driver()
>   firmware: tee_bnxt: Make use of tee bus methods
>   KEYS: trusted: Migrate to use tee specific driver registration
>     function
>   KEYS: trusted: Make use of tee bus methods
>   tpm/tpm_ftpm_tee: Make use of tee specific driver registration
>   tpm/tpm_ftpm_tee: Make use of tee bus methods
>
>  Documentation/driver-api/tee.rst             | 18 +----
>  drivers/char/hw_random/optee-rng.c           | 26 ++----
>  drivers/char/tpm/tpm_ftpm_tee.c              | 31 +++++---
>  drivers/firmware/arm_scmi/transports/optee.c | 32 +++-----
>  drivers/firmware/broadcom/tee_bnxt_fw.c      | 30 ++-----
>  drivers/firmware/efi/stmm/tee_stmm_efi.c     | 25 ++----
>  drivers/rtc/rtc-optee.c                      | 27 ++-----
>  drivers/tee/tee_core.c                       | 84 ++++++++++++++++++++
>  include/linux/tee_drv.h                      | 12 +++
>  security/keys/trusted-keys/trusted_tee.c     | 17 ++--
>  10 files changed, 164 insertions(+), 138 deletions(-)
>
> base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
> --
> 2.47.3
>

Thank you for the nice cleanup, Uwe.

I've applied patch 1-3 to the branch tee_bus_callback_for_6.20 in my
tree at https://git.kernel.org/pub/scm/linux/kernel/git/jenswi/linux-tee.git/

The branch is based on v6.19-rc1, and I'll try to keep it stable for
others to depend on, if needed. Let's see if we can agree on taking
the remaining patches via that branch.

Cheers,
Jens

On 18/12/2025 08:21:27+0100, Jens Wiklander wrote:
> Hi,
> 
> On Mon, Dec 15, 2025 at 3:17 PM Uwe Kleine-König
> <u.kleine-koenig@baylibre.com> wrote:
> >
> > Hello,
> >
> > the objective of this series is to make tee driver stop using callbacks
> > in struct device_driver. These were superseded by bus methods in 2006
> > (commit 594c8281f905 ("[PATCH] Add bus_type probe, remove, shutdown
> > methods.")) but nobody cared to convert all subsystems accordingly.
> >
> > Here the tee drivers are converted. The first commit is somewhat
> > unrelated, but simplifies the conversion (and the drivers). It
> > introduces driver registration helpers that care about setting the bus
> > and owner. (The latter is missing in all drivers, so by using these
> > helpers the drivers become more correct.)
> >
> > v1 of this series is available at
> > https://lore.kernel.org/all/cover.1765472125.git.u.kleine-koenig@baylibre.com
> >
> > Changes since v1:
> >
> >  - rebase to v6.19-rc1 (no conflicts)
> >  - add tags received so far
> >  - fix whitespace issues pointed out by Sumit Garg
> >  - fix shutdown callback to shutdown and not remove
> >
> > As already noted in v1's cover letter, this series should go in during a
> > single merge window as there are runtime warnings when the series is
> > only applied partially. Sumit Garg suggested to apply the whole series
> > via Jens Wiklander's tree.
> > If this is done the dependencies in this series are honored, in case the
> > plan changes: Patches #4 - #17 depend on the first two.
> >
> > Note this series is only build tested.
> >
> > Uwe Kleine-König (17):
> >   tee: Add some helpers to reduce boilerplate for tee client drivers
> >   tee: Add probe, remove and shutdown bus callbacks to tee_client_driver
> >   tee: Adapt documentation to cover recent additions
> >   hwrng: optee - Make use of module_tee_client_driver()
> >   hwrng: optee - Make use of tee bus methods
> >   rtc: optee: Migrate to use tee specific driver registration function
> >   rtc: optee: Make use of tee bus methods
> >   efi: stmm: Make use of module_tee_client_driver()
> >   efi: stmm: Make use of tee bus methods
> >   firmware: arm_scmi: optee: Make use of module_tee_client_driver()
> >   firmware: arm_scmi: Make use of tee bus methods
> >   firmware: tee_bnxt: Make use of module_tee_client_driver()
> >   firmware: tee_bnxt: Make use of tee bus methods
> >   KEYS: trusted: Migrate to use tee specific driver registration
> >     function
> >   KEYS: trusted: Make use of tee bus methods
> >   tpm/tpm_ftpm_tee: Make use of tee specific driver registration
> >   tpm/tpm_ftpm_tee: Make use of tee bus methods
> >
> >  Documentation/driver-api/tee.rst             | 18 +----
> >  drivers/char/hw_random/optee-rng.c           | 26 ++----
> >  drivers/char/tpm/tpm_ftpm_tee.c              | 31 +++++---
> >  drivers/firmware/arm_scmi/transports/optee.c | 32 +++-----
> >  drivers/firmware/broadcom/tee_bnxt_fw.c      | 30 ++-----
> >  drivers/firmware/efi/stmm/tee_stmm_efi.c     | 25 ++----
> >  drivers/rtc/rtc-optee.c                      | 27 ++-----
> >  drivers/tee/tee_core.c                       | 84 ++++++++++++++++++++
> >  include/linux/tee_drv.h                      | 12 +++
> >  security/keys/trusted-keys/trusted_tee.c     | 17 ++--
> >  10 files changed, 164 insertions(+), 138 deletions(-)
> >
> > base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
> > --
> > 2.47.3
> >
> 
> Thank you for the nice cleanup, Uwe.
> 
> I've applied patch 1-3 to the branch tee_bus_callback_for_6.20 in my
> tree at https://git.kernel.org/pub/scm/linux/kernel/git/jenswi/linux-tee.git/
> 
> The branch is based on v6.19-rc1, and I'll try to keep it stable for
> others to depend on, if needed. Let's see if we can agree on taking
> the remaining patches via that branch.

6 and 7 can go through your branch.

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

On Thu, Dec 18, 2025 at 2:53 PM Alexandre Belloni
<alexandre.belloni@bootlin.com> wrote:
>
> On 18/12/2025 08:21:27+0100, Jens Wiklander wrote:
> > Hi,
> >
> > On Mon, Dec 15, 2025 at 3:17 PM Uwe Kleine-König
> > <u.kleine-koenig@baylibre.com> wrote:
> > >
> > > Hello,
> > >
> > > the objective of this series is to make tee driver stop using callbacks
> > > in struct device_driver. These were superseded by bus methods in 2006
> > > (commit 594c8281f905 ("[PATCH] Add bus_type probe, remove, shutdown
> > > methods.")) but nobody cared to convert all subsystems accordingly.
> > >
> > > Here the tee drivers are converted. The first commit is somewhat
> > > unrelated, but simplifies the conversion (and the drivers). It
> > > introduces driver registration helpers that care about setting the bus
> > > and owner. (The latter is missing in all drivers, so by using these
> > > helpers the drivers become more correct.)
> > >
> > > v1 of this series is available at
> > > https://lore.kernel.org/all/cover.1765472125.git.u.kleine-koenig@baylibre.com
> > >
> > > Changes since v1:
> > >
> > >  - rebase to v6.19-rc1 (no conflicts)
> > >  - add tags received so far
> > >  - fix whitespace issues pointed out by Sumit Garg
> > >  - fix shutdown callback to shutdown and not remove
> > >
> > > As already noted in v1's cover letter, this series should go in during a
> > > single merge window as there are runtime warnings when the series is
> > > only applied partially. Sumit Garg suggested to apply the whole series
> > > via Jens Wiklander's tree.
> > > If this is done the dependencies in this series are honored, in case the
> > > plan changes: Patches #4 - #17 depend on the first two.
> > >
> > > Note this series is only build tested.
> > >
> > > Uwe Kleine-König (17):
> > >   tee: Add some helpers to reduce boilerplate for tee client drivers
> > >   tee: Add probe, remove and shutdown bus callbacks to tee_client_driver
> > >   tee: Adapt documentation to cover recent additions
> > >   hwrng: optee - Make use of module_tee_client_driver()
> > >   hwrng: optee - Make use of tee bus methods
> > >   rtc: optee: Migrate to use tee specific driver registration function
> > >   rtc: optee: Make use of tee bus methods
> > >   efi: stmm: Make use of module_tee_client_driver()
> > >   efi: stmm: Make use of tee bus methods
> > >   firmware: arm_scmi: optee: Make use of module_tee_client_driver()
> > >   firmware: arm_scmi: Make use of tee bus methods
> > >   firmware: tee_bnxt: Make use of module_tee_client_driver()
> > >   firmware: tee_bnxt: Make use of tee bus methods
> > >   KEYS: trusted: Migrate to use tee specific driver registration
> > >     function
> > >   KEYS: trusted: Make use of tee bus methods
> > >   tpm/tpm_ftpm_tee: Make use of tee specific driver registration
> > >   tpm/tpm_ftpm_tee: Make use of tee bus methods
> > >
> > >  Documentation/driver-api/tee.rst             | 18 +----
> > >  drivers/char/hw_random/optee-rng.c           | 26 ++----
> > >  drivers/char/tpm/tpm_ftpm_tee.c              | 31 +++++---
> > >  drivers/firmware/arm_scmi/transports/optee.c | 32 +++-----
> > >  drivers/firmware/broadcom/tee_bnxt_fw.c      | 30 ++-----
> > >  drivers/firmware/efi/stmm/tee_stmm_efi.c     | 25 ++----
> > >  drivers/rtc/rtc-optee.c                      | 27 ++-----
> > >  drivers/tee/tee_core.c                       | 84 ++++++++++++++++++++
> > >  include/linux/tee_drv.h                      | 12 +++
> > >  security/keys/trusted-keys/trusted_tee.c     | 17 ++--
> > >  10 files changed, 164 insertions(+), 138 deletions(-)
> > >
> > > base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
> > > --
> > > 2.47.3
> > >
> >
> > Thank you for the nice cleanup, Uwe.
> >
> > I've applied patch 1-3 to the branch tee_bus_callback_for_6.20 in my
> > tree at https://git.kernel.org/pub/scm/linux/kernel/git/jenswi/linux-tee.git/
> >
> > The branch is based on v6.19-rc1, and I'll try to keep it stable for
> > others to depend on, if needed. Let's see if we can agree on taking
> > the remaining patches via that branch.
>
> 6 and 7 can go through your branch.

Good, I've added them to my branch now.

Thanks,
Jens

Hi,

On Thu, Dec 18, 2025 at 5:29 PM Jens Wiklander
<jens.wiklander@linaro.org> wrote:
>
> On Thu, Dec 18, 2025 at 2:53 PM Alexandre Belloni
> <alexandre.belloni@bootlin.com> wrote:
> >
> > On 18/12/2025 08:21:27+0100, Jens Wiklander wrote:
> > > Hi,
> > >
> > > On Mon, Dec 15, 2025 at 3:17 PM Uwe Kleine-König
> > > <u.kleine-koenig@baylibre.com> wrote:
> > > >
> > > > Hello,
> > > >
> > > > the objective of this series is to make tee driver stop using callbacks
> > > > in struct device_driver. These were superseded by bus methods in 2006
> > > > (commit 594c8281f905 ("[PATCH] Add bus_type probe, remove, shutdown
> > > > methods.")) but nobody cared to convert all subsystems accordingly.
> > > >
> > > > Here the tee drivers are converted. The first commit is somewhat
> > > > unrelated, but simplifies the conversion (and the drivers). It
> > > > introduces driver registration helpers that care about setting the bus
> > > > and owner. (The latter is missing in all drivers, so by using these
> > > > helpers the drivers become more correct.)
> > > >
> > > > v1 of this series is available at
> > > > https://lore.kernel.org/all/cover.1765472125.git.u.kleine-koenig@baylibre.com
> > > >
> > > > Changes since v1:
> > > >
> > > >  - rebase to v6.19-rc1 (no conflicts)
> > > >  - add tags received so far
> > > >  - fix whitespace issues pointed out by Sumit Garg
> > > >  - fix shutdown callback to shutdown and not remove
> > > >
> > > > As already noted in v1's cover letter, this series should go in during a
> > > > single merge window as there are runtime warnings when the series is
> > > > only applied partially. Sumit Garg suggested to apply the whole series
> > > > via Jens Wiklander's tree.
> > > > If this is done the dependencies in this series are honored, in case the
> > > > plan changes: Patches #4 - #17 depend on the first two.
> > > >
> > > > Note this series is only build tested.
> > > >
> > > > Uwe Kleine-König (17):
> > > >   tee: Add some helpers to reduce boilerplate for tee client drivers
> > > >   tee: Add probe, remove and shutdown bus callbacks to tee_client_driver
> > > >   tee: Adapt documentation to cover recent additions
> > > >   hwrng: optee - Make use of module_tee_client_driver()
> > > >   hwrng: optee - Make use of tee bus methods
> > > >   rtc: optee: Migrate to use tee specific driver registration function
> > > >   rtc: optee: Make use of tee bus methods
> > > >   efi: stmm: Make use of module_tee_client_driver()
> > > >   efi: stmm: Make use of tee bus methods
> > > >   firmware: arm_scmi: optee: Make use of module_tee_client_driver()
> > > >   firmware: arm_scmi: Make use of tee bus methods
> > > >   firmware: tee_bnxt: Make use of module_tee_client_driver()
> > > >   firmware: tee_bnxt: Make use of tee bus methods
> > > >   KEYS: trusted: Migrate to use tee specific driver registration
> > > >     function
> > > >   KEYS: trusted: Make use of tee bus methods
> > > >   tpm/tpm_ftpm_tee: Make use of tee specific driver registration
> > > >   tpm/tpm_ftpm_tee: Make use of tee bus methods
> > > >
> > > >  Documentation/driver-api/tee.rst             | 18 +----
> > > >  drivers/char/hw_random/optee-rng.c           | 26 ++----
> > > >  drivers/char/tpm/tpm_ftpm_tee.c              | 31 +++++---
> > > >  drivers/firmware/arm_scmi/transports/optee.c | 32 +++-----
> > > >  drivers/firmware/broadcom/tee_bnxt_fw.c      | 30 ++-----
> > > >  drivers/firmware/efi/stmm/tee_stmm_efi.c     | 25 ++----
> > > >  drivers/rtc/rtc-optee.c                      | 27 ++-----
> > > >  drivers/tee/tee_core.c                       | 84 ++++++++++++++++++++
> > > >  include/linux/tee_drv.h                      | 12 +++
> > > >  security/keys/trusted-keys/trusted_tee.c     | 17 ++--
> > > >  10 files changed, 164 insertions(+), 138 deletions(-)
> > > >
> > > > base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
> > > > --
> > > > 2.47.3
> > > >
> > >
> > > Thank you for the nice cleanup, Uwe.
> > >
> > > I've applied patch 1-3 to the branch tee_bus_callback_for_6.20 in my
> > > tree at https://git.kernel.org/pub/scm/linux/kernel/git/jenswi/linux-tee.git/
> > >
> > > The branch is based on v6.19-rc1, and I'll try to keep it stable for
> > > others to depend on, if needed. Let's see if we can agree on taking
> > > the remaining patches via that branch.
> >
> > 6 and 7 can go through your branch.
>
> Good, I've added them to my branch now.

This entire patch set should go in during a single merge window. I
will not send any pull request until I'm sure all patches will be
merged.

So far (if I'm not mistaken), only the patches I've already added to
next have appeared next. I can take the rest of the patches, too, but
I need OK for the following:

Jarkko, you seem happy with the following patches
- KEYS: trusted: Migrate to use tee specific driver registration function
- KEYS: trusted: Make use of tee bus methods
- tpm/tpm_ftpm_tee: Make use of tee specific driver registration
- tpm/tpm_ftpm_tee: Make use of tee bus methods
OK if I take them via my tree, or would you rather take them yourself?

Herbert, you seem happy with the following patches
- hwrng: optee - Make use of module_tee_client_driver()
- hwrng: optee - Make use of tee bus methods
OK if I take them via my tree, or would you rather take them yourself?

Sudeep, you seem happy with the following patches
- firmware: arm_scmi: optee: Make use of module_tee_client_driver()
- firmware: arm_scmi: Make use of tee bus methods
OK if I take them via my tree, or would you rather take them yourself?

Michael, Pavan, are you OK with the following patches
- firmware: tee_bnxt: Make use of module_tee_client_driver()
- firmware: tee_bnxt: Make use of tee bus methods
OK if I take them via my tree, or would you rather take them yourself?

Thanks,
Jens

On Mon, Jan 05, 2026 at 10:16:09AM +0100, Jens Wiklander wrote:
> Hi,
> 
> On Thu, Dec 18, 2025 at 5:29 PM Jens Wiklander
> <jens.wiklander@linaro.org> wrote:
> >
> > On Thu, Dec 18, 2025 at 2:53 PM Alexandre Belloni
> > <alexandre.belloni@bootlin.com> wrote:
> > >
> > > On 18/12/2025 08:21:27+0100, Jens Wiklander wrote:
> > > > Hi,
> > > >
> > > > On Mon, Dec 15, 2025 at 3:17 PM Uwe Kleine-König
> > > > <u.kleine-koenig@baylibre.com> wrote:
> > > > >
> > > > > Hello,
> > > > >
> > > > > the objective of this series is to make tee driver stop using callbacks
> > > > > in struct device_driver. These were superseded by bus methods in 2006
> > > > > (commit 594c8281f905 ("[PATCH] Add bus_type probe, remove, shutdown
> > > > > methods.")) but nobody cared to convert all subsystems accordingly.
> > > > >
> > > > > Here the tee drivers are converted. The first commit is somewhat
> > > > > unrelated, but simplifies the conversion (and the drivers). It
> > > > > introduces driver registration helpers that care about setting the bus
> > > > > and owner. (The latter is missing in all drivers, so by using these
> > > > > helpers the drivers become more correct.)
> > > > >
> > > > > v1 of this series is available at
> > > > > https://lore.kernel.org/all/cover.1765472125.git.u.kleine-koenig@baylibre.com
> > > > >
> > > > > Changes since v1:
> > > > >
> > > > >  - rebase to v6.19-rc1 (no conflicts)
> > > > >  - add tags received so far
> > > > >  - fix whitespace issues pointed out by Sumit Garg
> > > > >  - fix shutdown callback to shutdown and not remove
> > > > >
> > > > > As already noted in v1's cover letter, this series should go in during a
> > > > > single merge window as there are runtime warnings when the series is
> > > > > only applied partially. Sumit Garg suggested to apply the whole series
> > > > > via Jens Wiklander's tree.
> > > > > If this is done the dependencies in this series are honored, in case the
> > > > > plan changes: Patches #4 - #17 depend on the first two.
> > > > >
> > > > > Note this series is only build tested.
> > > > >
> > > > > Uwe Kleine-König (17):
> > > > >   tee: Add some helpers to reduce boilerplate for tee client drivers
> > > > >   tee: Add probe, remove and shutdown bus callbacks to tee_client_driver
> > > > >   tee: Adapt documentation to cover recent additions
> > > > >   hwrng: optee - Make use of module_tee_client_driver()
> > > > >   hwrng: optee - Make use of tee bus methods
> > > > >   rtc: optee: Migrate to use tee specific driver registration function
> > > > >   rtc: optee: Make use of tee bus methods
> > > > >   efi: stmm: Make use of module_tee_client_driver()
> > > > >   efi: stmm: Make use of tee bus methods
> > > > >   firmware: arm_scmi: optee: Make use of module_tee_client_driver()
> > > > >   firmware: arm_scmi: Make use of tee bus methods
> > > > >   firmware: tee_bnxt: Make use of module_tee_client_driver()
> > > > >   firmware: tee_bnxt: Make use of tee bus methods
> > > > >   KEYS: trusted: Migrate to use tee specific driver registration
> > > > >     function
> > > > >   KEYS: trusted: Make use of tee bus methods
> > > > >   tpm/tpm_ftpm_tee: Make use of tee specific driver registration
> > > > >   tpm/tpm_ftpm_tee: Make use of tee bus methods
> > > > >
> > > > >  Documentation/driver-api/tee.rst             | 18 +----
> > > > >  drivers/char/hw_random/optee-rng.c           | 26 ++----
> > > > >  drivers/char/tpm/tpm_ftpm_tee.c              | 31 +++++---
> > > > >  drivers/firmware/arm_scmi/transports/optee.c | 32 +++-----
> > > > >  drivers/firmware/broadcom/tee_bnxt_fw.c      | 30 ++-----
> > > > >  drivers/firmware/efi/stmm/tee_stmm_efi.c     | 25 ++----
> > > > >  drivers/rtc/rtc-optee.c                      | 27 ++-----
> > > > >  drivers/tee/tee_core.c                       | 84 ++++++++++++++++++++
> > > > >  include/linux/tee_drv.h                      | 12 +++
> > > > >  security/keys/trusted-keys/trusted_tee.c     | 17 ++--
> > > > >  10 files changed, 164 insertions(+), 138 deletions(-)
> > > > >
> > > > > base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
> > > > > --
> > > > > 2.47.3
> > > > >
> > > >
> > > > Thank you for the nice cleanup, Uwe.
> > > >
> > > > I've applied patch 1-3 to the branch tee_bus_callback_for_6.20 in my
> > > > tree at https://git.kernel.org/pub/scm/linux/kernel/git/jenswi/linux-tee.git/
> > > >
> > > > The branch is based on v6.19-rc1, and I'll try to keep it stable for
> > > > others to depend on, if needed. Let's see if we can agree on taking
> > > > the remaining patches via that branch.
> > >
> > > 6 and 7 can go through your branch.
> >
> > Good, I've added them to my branch now.
> 
> This entire patch set should go in during a single merge window. I
> will not send any pull request until I'm sure all patches will be
> merged.
> 
> So far (if I'm not mistaken), only the patches I've already added to
> next have appeared next. I can take the rest of the patches, too, but
> I need OK for the following:
> 
> Jarkko, you seem happy with the following patches
> - KEYS: trusted: Migrate to use tee specific driver registration function
> - KEYS: trusted: Make use of tee bus methods
> - tpm/tpm_ftpm_tee: Make use of tee specific driver registration
> - tpm/tpm_ftpm_tee: Make use of tee bus methods
> OK if I take them via my tree, or would you rather take them yourself?

I don't mind.

> 
> Herbert, you seem happy with the following patches
> - hwrng: optee - Make use of module_tee_client_driver()
> - hwrng: optee - Make use of tee bus methods
> OK if I take them via my tree, or would you rather take them yourself?
> 
> Sudeep, you seem happy with the following patches
> - firmware: arm_scmi: optee: Make use of module_tee_client_driver()
> - firmware: arm_scmi: Make use of tee bus methods
> OK if I take them via my tree, or would you rather take them yourself?
> 
> Michael, Pavan, are you OK with the following patches
> - firmware: tee_bnxt: Make use of module_tee_client_driver()
> - firmware: tee_bnxt: Make use of tee bus methods
> OK if I take them via my tree, or would you rather take them yourself?
> 
> Thanks,
> Jens

BR, Jarkko

On Mon, Jan 05, 2026 at 10:16:09AM +0100, Jens Wiklander wrote:
> Hi,
> 
> On Thu, Dec 18, 2025 at 5:29 PM Jens Wiklander
> <jens.wiklander@linaro.org> wrote:
> >
> > On Thu, Dec 18, 2025 at 2:53 PM Alexandre Belloni
> > <alexandre.belloni@bootlin.com> wrote:
> > >
> > > On 18/12/2025 08:21:27+0100, Jens Wiklander wrote:
> > > > Hi,
> > > >
> > > > On Mon, Dec 15, 2025 at 3:17 PM Uwe Kleine-König
> > > > <u.kleine-koenig@baylibre.com> wrote:
> > > > >
> > > > > Hello,
> > > > >
> > > > > the objective of this series is to make tee driver stop using callbacks
> > > > > in struct device_driver. These were superseded by bus methods in 2006
> > > > > (commit 594c8281f905 ("[PATCH] Add bus_type probe, remove, shutdown
> > > > > methods.")) but nobody cared to convert all subsystems accordingly.
> > > > >
> > > > > Here the tee drivers are converted. The first commit is somewhat
> > > > > unrelated, but simplifies the conversion (and the drivers). It
> > > > > introduces driver registration helpers that care about setting the bus
> > > > > and owner. (The latter is missing in all drivers, so by using these
> > > > > helpers the drivers become more correct.)
> > > > >
> > > > > v1 of this series is available at
> > > > > https://lore.kernel.org/all/cover.1765472125.git.u.kleine-koenig@baylibre.com
> > > > >
> > > > > Changes since v1:
> > > > >
> > > > >  - rebase to v6.19-rc1 (no conflicts)
> > > > >  - add tags received so far
> > > > >  - fix whitespace issues pointed out by Sumit Garg
> > > > >  - fix shutdown callback to shutdown and not remove
> > > > >
> > > > > As already noted in v1's cover letter, this series should go in during a
> > > > > single merge window as there are runtime warnings when the series is
> > > > > only applied partially. Sumit Garg suggested to apply the whole series
> > > > > via Jens Wiklander's tree.
> > > > > If this is done the dependencies in this series are honored, in case the
> > > > > plan changes: Patches #4 - #17 depend on the first two.
> > > > >
> > > > > Note this series is only build tested.
> > > > >
> > > > > Uwe Kleine-König (17):
> > > > >   tee: Add some helpers to reduce boilerplate for tee client drivers
> > > > >   tee: Add probe, remove and shutdown bus callbacks to tee_client_driver
> > > > >   tee: Adapt documentation to cover recent additions
> > > > >   hwrng: optee - Make use of module_tee_client_driver()
> > > > >   hwrng: optee - Make use of tee bus methods
> > > > >   rtc: optee: Migrate to use tee specific driver registration function
> > > > >   rtc: optee: Make use of tee bus methods
> > > > >   efi: stmm: Make use of module_tee_client_driver()
> > > > >   efi: stmm: Make use of tee bus methods
> > > > >   firmware: arm_scmi: optee: Make use of module_tee_client_driver()
> > > > >   firmware: arm_scmi: Make use of tee bus methods
> > > > >   firmware: tee_bnxt: Make use of module_tee_client_driver()
> > > > >   firmware: tee_bnxt: Make use of tee bus methods
> > > > >   KEYS: trusted: Migrate to use tee specific driver registration
> > > > >     function
> > > > >   KEYS: trusted: Make use of tee bus methods
> > > > >   tpm/tpm_ftpm_tee: Make use of tee specific driver registration
> > > > >   tpm/tpm_ftpm_tee: Make use of tee bus methods
> > > > >
> > > > >  Documentation/driver-api/tee.rst             | 18 +----
> > > > >  drivers/char/hw_random/optee-rng.c           | 26 ++----
> > > > >  drivers/char/tpm/tpm_ftpm_tee.c              | 31 +++++---
> > > > >  drivers/firmware/arm_scmi/transports/optee.c | 32 +++-----
> > > > >  drivers/firmware/broadcom/tee_bnxt_fw.c      | 30 ++-----
> > > > >  drivers/firmware/efi/stmm/tee_stmm_efi.c     | 25 ++----
> > > > >  drivers/rtc/rtc-optee.c                      | 27 ++-----
> > > > >  drivers/tee/tee_core.c                       | 84 ++++++++++++++++++++
> > > > >  include/linux/tee_drv.h                      | 12 +++
> > > > >  security/keys/trusted-keys/trusted_tee.c     | 17 ++--
> > > > >  10 files changed, 164 insertions(+), 138 deletions(-)
> > > > >
> > > > > base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
> > > > > --
> > > > > 2.47.3
> > > > >
> > > >
> > > > Thank you for the nice cleanup, Uwe.
> > > >
> > > > I've applied patch 1-3 to the branch tee_bus_callback_for_6.20 in my
> > > > tree at https://git.kernel.org/pub/scm/linux/kernel/git/jenswi/linux-tee.git/
> > > >
> > > > The branch is based on v6.19-rc1, and I'll try to keep it stable for
> > > > others to depend on, if needed. Let's see if we can agree on taking
> > > > the remaining patches via that branch.
> > >
> > > 6 and 7 can go through your branch.
> >
> > Good, I've added them to my branch now.
> 
> This entire patch set should go in during a single merge window. I
> will not send any pull request until I'm sure all patches will be
> merged.
> 
> So far (if I'm not mistaken), only the patches I've already added to
> next have appeared next. I can take the rest of the patches, too, but
> I need OK for the following:
> 

[...]

> 
> Sudeep, you seem happy with the following patches
> - firmware: arm_scmi: optee: Make use of module_tee_client_driver()
> - firmware: arm_scmi: Make use of tee bus methods
> OK if I take them via my tree, or would you rather take them yourself?
>

I am happy if you want to take all of them in one go. I think I have
already acked it. Please shout if you need anything else from me, happy to
help in anyway to make it easier to handle this change set.

-- 
Regards,
Sudeep

On Tue, Jan 6, 2026 at 2:40 PM Sudeep Holla <sudeep.holla@arm.com> wrote:
>
> On Mon, Jan 05, 2026 at 10:16:09AM +0100, Jens Wiklander wrote:
> > Hi,
> >
> > On Thu, Dec 18, 2025 at 5:29 PM Jens Wiklander
> > <jens.wiklander@linaro.org> wrote:
> > >
> > > On Thu, Dec 18, 2025 at 2:53 PM Alexandre Belloni
> > > <alexandre.belloni@bootlin.com> wrote:
> > > >
> > > > On 18/12/2025 08:21:27+0100, Jens Wiklander wrote:
> > > > > Hi,
> > > > >
> > > > > On Mon, Dec 15, 2025 at 3:17 PM Uwe Kleine-König
> > > > > <u.kleine-koenig@baylibre.com> wrote:
> > > > > >
> > > > > > Hello,
> > > > > >
> > > > > > the objective of this series is to make tee driver stop using callbacks
> > > > > > in struct device_driver. These were superseded by bus methods in 2006
> > > > > > (commit 594c8281f905 ("[PATCH] Add bus_type probe, remove, shutdown
> > > > > > methods.")) but nobody cared to convert all subsystems accordingly.
> > > > > >
> > > > > > Here the tee drivers are converted. The first commit is somewhat
> > > > > > unrelated, but simplifies the conversion (and the drivers). It
> > > > > > introduces driver registration helpers that care about setting the bus
> > > > > > and owner. (The latter is missing in all drivers, so by using these
> > > > > > helpers the drivers become more correct.)
> > > > > >
> > > > > > v1 of this series is available at
> > > > > > https://lore.kernel.org/all/cover.1765472125.git.u.kleine-koenig@baylibre.com
> > > > > >
> > > > > > Changes since v1:
> > > > > >
> > > > > >  - rebase to v6.19-rc1 (no conflicts)
> > > > > >  - add tags received so far
> > > > > >  - fix whitespace issues pointed out by Sumit Garg
> > > > > >  - fix shutdown callback to shutdown and not remove
> > > > > >
> > > > > > As already noted in v1's cover letter, this series should go in during a
> > > > > > single merge window as there are runtime warnings when the series is
> > > > > > only applied partially. Sumit Garg suggested to apply the whole series
> > > > > > via Jens Wiklander's tree.
> > > > > > If this is done the dependencies in this series are honored, in case the
> > > > > > plan changes: Patches #4 - #17 depend on the first two.
> > > > > >
> > > > > > Note this series is only build tested.
> > > > > >
> > > > > > Uwe Kleine-König (17):
> > > > > >   tee: Add some helpers to reduce boilerplate for tee client drivers
> > > > > >   tee: Add probe, remove and shutdown bus callbacks to tee_client_driver
> > > > > >   tee: Adapt documentation to cover recent additions
> > > > > >   hwrng: optee - Make use of module_tee_client_driver()
> > > > > >   hwrng: optee - Make use of tee bus methods
> > > > > >   rtc: optee: Migrate to use tee specific driver registration function
> > > > > >   rtc: optee: Make use of tee bus methods
> > > > > >   efi: stmm: Make use of module_tee_client_driver()
> > > > > >   efi: stmm: Make use of tee bus methods
> > > > > >   firmware: arm_scmi: optee: Make use of module_tee_client_driver()
> > > > > >   firmware: arm_scmi: Make use of tee bus methods
> > > > > >   firmware: tee_bnxt: Make use of module_tee_client_driver()
> > > > > >   firmware: tee_bnxt: Make use of tee bus methods
> > > > > >   KEYS: trusted: Migrate to use tee specific driver registration
> > > > > >     function
> > > > > >   KEYS: trusted: Make use of tee bus methods
> > > > > >   tpm/tpm_ftpm_tee: Make use of tee specific driver registration
> > > > > >   tpm/tpm_ftpm_tee: Make use of tee bus methods
> > > > > >
> > > > > >  Documentation/driver-api/tee.rst             | 18 +----
> > > > > >  drivers/char/hw_random/optee-rng.c           | 26 ++----
> > > > > >  drivers/char/tpm/tpm_ftpm_tee.c              | 31 +++++---
> > > > > >  drivers/firmware/arm_scmi/transports/optee.c | 32 +++-----
> > > > > >  drivers/firmware/broadcom/tee_bnxt_fw.c      | 30 ++-----
> > > > > >  drivers/firmware/efi/stmm/tee_stmm_efi.c     | 25 ++----
> > > > > >  drivers/rtc/rtc-optee.c                      | 27 ++-----
> > > > > >  drivers/tee/tee_core.c                       | 84 ++++++++++++++++++++
> > > > > >  include/linux/tee_drv.h                      | 12 +++
> > > > > >  security/keys/trusted-keys/trusted_tee.c     | 17 ++--
> > > > > >  10 files changed, 164 insertions(+), 138 deletions(-)
> > > > > >
> > > > > > base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
> > > > > > --
> > > > > > 2.47.3
> > > > > >
> > > > >
> > > > > Thank you for the nice cleanup, Uwe.
> > > > >
> > > > > I've applied patch 1-3 to the branch tee_bus_callback_for_6.20 in my
> > > > > tree at https://git.kernel.org/pub/scm/linux/kernel/git/jenswi/linux-tee.git/
> > > > >
> > > > > The branch is based on v6.19-rc1, and I'll try to keep it stable for
> > > > > others to depend on, if needed. Let's see if we can agree on taking
> > > > > the remaining patches via that branch.
> > > >
> > > > 6 and 7 can go through your branch.
> > >
> > > Good, I've added them to my branch now.
> >
> > This entire patch set should go in during a single merge window. I
> > will not send any pull request until I'm sure all patches will be
> > merged.
> >
> > So far (if I'm not mistaken), only the patches I've already added to
> > next have appeared next. I can take the rest of the patches, too, but
> > I need OK for the following:
> >
>
> [...]
>
> >
> > Sudeep, you seem happy with the following patches
> > - firmware: arm_scmi: optee: Make use of module_tee_client_driver()
> > - firmware: arm_scmi: Make use of tee bus methods
> > OK if I take them via my tree, or would you rather take them yourself?
> >
>
> I am happy if you want to take all of them in one go. I think I have
> already acked it. Please shout if you need anything else from me, happy to
> help in anyway to make it easier to handle this change set.

Thanks, I've applied all the patches in the series now, since it
otherwise causes warnings during boot.

/Jens

On Mon, Jan 05, 2026 at 10:16:09AM +0100, Jens Wiklander wrote:
>
> Herbert, you seem happy with the following patches
> - hwrng: optee - Make use of module_tee_client_driver()
> - hwrng: optee - Make use of tee bus methods
> OK if I take them via my tree, or would you rather take them yourself?

Feel free to take them through your tree.

Thanks,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt