[PATCH v12 0/2] Add RP1 PWM controller support

[Andrea della Porta]

Hi Uwe,

since all of the patches have received at least one Reviewed/Tested-By
and Sashiko doesn't seem to complain anymore, could we go on with
this patchset?

Many thanks,
Andrea

On 15:02 Tue 29 Sep     , Andrea della Porta wrote:
> This patchset adds support for the PWM controller found on the
> Raspberry Pi RP1 southbridge. This is necessary to operate the
> cooling fan connected to one of the PWM channels.
> 
> The tachometer pin for the fan speed is managed by the firmware 
> running on the RP1's M-core. It uses the PHASE2 register
> to report the RPM, which will be exported by this driver via
> a function. A subsequent patch will add the function to read the
> speed to this driver and a new device and driver to read the RPM
> and export this value via hwmon.
>  
> Subsequent patches will also add the CPU thermal zone, which
> acts as a consumer of the PWM device.
> 
> Best regards,
> Andrea
> 
> 
> CHANGES in V12:
> 
> - added a comment to better explain why we don't need to save and
>   restore config registers upon suspend/resume, hopefully Sashiko
>   will stop complaining about that.
> - the RMW access to teh global control register is not synchronized
>   via spinlock.
> - patch 3 from previous release:
>   "arm64: dts: broadcom: rpi-5: Add RP1 PWM node"
>   has been dropped from this patchset since it's already applied
>   to Florian's devicetre-arm64/next branch.
> 
> Link to V11:
> https://lore.kernel.org/all/cover.1790606188.git.andrea.porta@suse.com/
> 
> 
> Naushir Patuck (2):
>   dt-bindings: pwm: Add Raspberry Pi RP1 PWM controller
>   pwm: rp1: Add RP1 PWM controller driver
> 
>  .../bindings/pwm/raspberrypi,rp1-pwm.yaml     |  66 +++
>  drivers/pwm/Kconfig                           |   7 +
>  drivers/pwm/Makefile                          |   1 +
>  drivers/pwm/pwm-rp1.c                         | 428 ++++++++++++++++++
>  4 files changed, 502 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pwm/raspberrypi,rp1-pwm.yaml
>  create mode 100644 drivers/pwm/pwm-rp1.c
> 
> -- 
> 2.35.3
>