linux-kernel - Re: [PATCH v3 0/5] Introduce PRU remoteproc consumer API

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Date:   Thu, 28 Apr 2022 16:53:22 +0530
From:   Puranjay Mohan <p-mohan@...com>
To:     <linux-kernel@...r.kernel.org>
CC:     <bjorn.andersson@...aro.org>, <mathieu.poirier@...aro.org>,
        <krzysztof.kozlowski+dt@...aro.org>,
        <linux-remoteproc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <nm@...com>, <ssantosh@...nel.org>, <s-anna@...com>,
        <linux-arm-kernel@...ts.infradead.org>, <rogerq@...nel.org>,
        <grygorii.strashko@...com>, <vigneshr@...com>, <kishon@...com>
Subject: Re: [PATCH v3 0/5] Introduce PRU remoteproc consumer API

Hi Bjorn,
Hi Mathieu,

I am writing to follow up on this patch series.
This has been on the list for the last 10 days and I have not received
any comments on it. So, does this look good to everyone?

I had solved the minor checkpatch issues from v2 so I guess this series
should be good now?

Looking forward to your comments.

Thanks
Puranjay Mohan

On 18/04/22 16:11, Puranjay Mohan wrote:
> This is the v3 of the patch series [1]. The v2 had some minor comments
> which have been addressed here.
> 
> I will be posting two more patch series which 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/20201216165239.2744-1-grzegorz.jaszczyk@linaro.org/
> [2] https://patchwork.kernel.org/project/linux-remoteproc/cover/20220406094358.7895-1-p-mohan@ti.com/
> 
> Thanks,
> 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 (2):
>   remoteproc: pru: Add APIs to get and put the PRU cores
>   remoteproc: pru: Configure firmware based on client setup
> 
>  .../bindings/remoteproc/ti,pru-consumer.yaml  |  70 ++++++
>  drivers/remoteproc/pru_rproc.c                | 234 +++++++++++++++++-
>  include/linux/pruss.h                         |  78 ++++++
>  3 files changed, 377 insertions(+), 5 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/remoteproc/ti,pru-consumer.yaml
>  create mode 100644 include/linux/pruss.h
>