[PATCH v7 0/5] Introduce PRU remoteproc consumer API

[MD Danish Anwar]

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.

This is the v7 of the patch series [1]. This version of the patchset 
addresses the comments made on v6 [7] of the series. 

Two more patch series have been posted ([2] and [3]) that depends on this
series, one has been posted to the soc/ti/ tree and another  
to the networking tree. All the 3 series including this one, has been 
sent as RFC [4] to get comments and to explain the dependencies.

Changes from v6 to v7 :

*) Removed example section from ti,pru-consumer.yaml as the full example 
included compatible property as well which is not introduced in this series 
thus creating dt check binding error. Removing the example section fixes the
dt binding check error. The example section will be included in 
"ti,icssg-prueth.yaml" in the next version of series [3]
*) Updated the commit message for patch 1/5 of this series to address Krzysztof's 
comment.

Changes from v5 to v6 :

*) Added rproc_get_by_phandle() in pru_rproc_get() 
*) Provided background of Ctable in the commit messege.
*) Removed patch "" [6] (6th Patch of the previous version of this series)
   as it has dependency on series [2], thus creating a cyclic dependency.

The patch [6] will be sent along with the next version of series [2].

[1] https://patchwork.kernel.org/project/linux-remoteproc/cover/20220603121520.13730-1-p-mohan@ti.com/
[2] https://lore.kernel.org/all/20220418123004.9332-1-p-mohan@ti.com/
[3] https://lore.kernel.org/all/20220531095108.21757-1-p-mohan@ti.com/
[4] https://patchwork.kernel.org/project/linux-remoteproc/cover/20220406094358.7895-1-p-mohan@ti.com/
[5] https://lore.kernel.org/all/20220607045650.4999-1-p-mohan@ti.com/
[6] https://lore.kernel.org/all/20220607045650.4999-7-p-mohan@ti.com/
[7] https://lore.kernel.org/all/20221012114429.2341215-1-danishanwar@ti.com/

Thanks and Regards,
Md Danish Anwar

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  |  60 +++++
 drivers/remoteproc/pru_rproc.c                | 237 +++++++++++++++++-
 include/linux/pruss.h                         |  78 ++++++
 3 files changed, 370 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/remoteproc/ti,pru-consumer.yaml
 create mode 100644 include/linux/pruss.h

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2.25.1