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[v3,0/5] Introduce PRU remoteproc consumer API

Message ID 20220418104118.12878-1-p-mohan@ti.com
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Series Introduce PRU remoteproc consumer API | expand

Message

Puranjay Mohan April 18, 2022, 10:41 a.m. UTC 
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