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 TI PRUSS subsystem: the PRUSS platform driver, the PRUSS INTC driver and the PRUSS remoteproc driver. Two first 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 The third one [1] was accepted and applied to andersson/remoteproc.git (refs/heads/for-next): [2] but is not merged yet. 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 patch set depends on "Introduce PRU remoteproc consumer API" set [3], which is complementary to this one but goes for different, remoteproc sub-system. [1] https://patchwork.kernel.org/project/linux-arm-kernel/cover/20201208141002.17777-1-grzegorz.jaszczyk@xxxxxxxxxx/ [2] https://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc.git/commit/?h=for-next&id=b44786c9bdc46eac8388843f0a6116369cb18bca [3] https://patchwork.kernel.org/project/linux-arm-kernel/cover/20201211142933.25784-1-grzegorz.jaszczyk@xxxxxxxxxx/ Best regards, Grzegorz Andrew F. Davis (1): soc: ti: pruss: Add pruss_{request,release}_mem_region() API Suman Anna (3): soc: ti: pruss: Add pruss_cfg_read()/update() API soc: ti: pruss: Add helper functions to set GPI mode, MII_RT_event and XFR soc: ti: pruss: Add helper function to enable OCP master ports Tero Kristo (2): soc: ti: pruss: Add pruss_get()/put() API soc: ti: pruss: Add helper functions to get/set PRUSS_CFG_GPMUX drivers/soc/ti/pruss.c | 257 ++++++++++++++++++++++++++++++++++- include/linux/pruss.h | 221 ++++++++++++++++++++++++++++++ include/linux/pruss_driver.h | 72 +++++++--- 3 files changed, 526 insertions(+), 24 deletions(-) -- 2.29.0
