linux-kernel - [PATCH v2 0/5] Introduce PRU remoteproc consumer API

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Message-Id: <20201216165239.2744-1-grzegorz.jaszczyk@linaro.org>
Date:   Wed, 16 Dec 2020 17:52:34 +0100
From:   Grzegorz Jaszczyk <grzegorz.jaszczyk@...aro.org>
To:     ohad@...ery.com, bjorn.andersson@...aro.org,
        mathieu.poirier@...aro.org, robh+dt@...nel.org, s-anna@...com,
        ssantosh@...nel.org
Cc:     grzegorz.jaszczyk@...aro.org, linux-remoteproc@...r.kernel.org,
        lee.jones@...aro.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, praneeth@...com,
        rogerq@...com, t-kristo@...com
Subject: [PATCH v2 0/5] Introduce PRU remoteproc consumer API

Hi All,

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.

Patch #3 of this series depends on one not merged remteproc related patch [1].

Please see the individual patches for exact changes in each patch, following is
the only change from v1:
 - Change the 'prus' property name to 'ti,prus' as suggested by Rob Herring,
 which influences patch #1 and patch #2

[1] https://patchwork.kernel.org/project/linux-remoteproc/patch/20201121030156.22857-3-s-anna@ti.com/

Best regards,
Grzegorz

Roger Quadros (1):
  remoteproc: pru: Add pru_rproc_set_ctable() function

Suman Anna (2):
  dt-bindings: remoteproc: Add PRU consumer bindings
  remoteproc: pru: Deny rproc sysfs ops 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  |  64 +++++
 drivers/remoteproc/pru_rproc.c                | 221 +++++++++++++++++-
 include/linux/pruss.h                         |  78 +++++++
 3 files changed, 360 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/remoteproc/ti,pru-consumer.yaml
 create mode 100644 include/linux/pruss.h

-- 
2.29.0