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Date:   Mon, 6 Jun 2022 09:56:12 -0600
From:   Mathieu Poirier <mathieu.poirier@linaro.org>
To:     Puranjay Mohan <p-mohan@ti.com>
Cc:     linux-kernel@vger.kernel.org, bjorn.andersson@linaro.org,
        krzysztof.kozlowski+dt@linaro.org,
        linux-remoteproc@vger.kernel.org, devicetree@vger.kernel.org,
        nm@ti.com, ssantosh@kernel.org, s-anna@ti.com,
        linux-arm-kernel@lists.infradead.org, rogerq@kernel.org,
        grygorii.strashko@ti.com, vigneshr@ti.com, kishon@ti.com,
        robh@kernel.org
Subject: Re: [PATCH v4 0/6] Introduce PRU remoteproc consumer API
Message-ID: <20220606155612.GA809345@p14s>
References: <20220603121520.13730-1-p-mohan@ti.com>
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I have started to review this set, comments will come over the next few days.  I
will clearly inform you when I am done reviewing.

Thanks,
Mathieu

On Fri, Jun 03, 2022 at 05:45:14PM +0530, Puranjay Mohan wrote:
> This is the v4 of the patch series [1]. The v3 had some comments
> on the DT patch that have been addressed here. The 6th patch in this
> series was missed in the previous versions, so, it has been added now.
> 
> I have posted two more patch series that depend on this series, one to
> the soc tree and another to the networking tree. I had sent all the 3
> series, including this one as RFC [2] to get comments and to explain the
> dependencies.
> 
> The Programmable Real-Time Unit and Industrial Communication Subsystem
> (PRU-ICSS or simply PRUSS) on various TI SoCs consists of dual 32-bit
> RISC cores (Programmable Real-Time Units, or PRUs) for program execution.
> 
> There are 3 foundation components for PRUSS subsystem: the PRUSS platform
> driver, the PRUSS INTC driver and the PRUSS remoteproc driver. All were
> already merged and can be found under:
> 1) drivers/soc/ti/pruss.c
>    Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml
> 2) drivers/irqchip/irq-pruss-intc.c
>    Documentation/devicetree/bindings/interrupt-controller/ti,pruss-intc.yaml
> 3) drivers/remoteproc/pru_rproc.c
>    Documentation/devicetree/bindings/remoteproc/ti,pru-rproc.yaml
> 
> The programmable nature of the PRUs provide flexibility to implement custom
> peripheral interfaces, fast real-time responses, or specialized data handling.
> Example of a PRU consumer drivers will be:
>   - Software UART over PRUSS
>   - PRU-ICSS Ethernet EMAC
> 
> In order to make usage of common PRU resources and allow the consumer drivers to
> configure the PRU hardware for specific usage the PRU API is introduced.
> 
> [1] https://patchwork.kernel.org/project/linux-remoteproc/cover/20220418104118.12878-1-p-mohan@ti.com/
> [2] https://patchwork.kernel.org/project/linux-remoteproc/cover/20220406094358.7895-1-p-mohan@ti.com/
> 
> Thanks and Regards,
> Puranjay Mohan
> 
> Roger Quadros (1):
>   remoteproc: pru: Add pru_rproc_set_ctable() function
> 
> Suman Anna (2):
>   dt-bindings: remoteproc: Add PRU consumer bindings
>   remoteproc: pru: Make sysfs entries read-only for PRU client driven
>     boots
> 
> Tero Kristo (3):
>   remoteproc: pru: Add APIs to get and put the PRU cores
>   remoteproc: pru: Configure firmware based on client setup
>   remoteproc: pru: add support for configuring GPMUX based on client
>     setup
> 
>  .../bindings/remoteproc/ti,pru-consumer.yaml  |  69 +++++
>  drivers/remoteproc/pru_rproc.c                | 254 +++++++++++++++++-
>  include/linux/pruss.h                         |  78 ++++++
>  3 files changed, 396 insertions(+), 5 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/remoteproc/ti,pru-consumer.yaml
>  create mode 100644 include/linux/pruss.h
> 
> -- 
> 2.17.1
>