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@xxxxxx/ [2] https://patchwork.kernel.org/project/linux-remoteproc/cover/20220406094358.7895-1-p-mohan@xxxxxx/ 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
