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    SubjectRe: [PATCH 0/6] Add TI PRUSS platform driver
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    On 8/20/20 7:43 AM, Suman Anna wrote:
    > Hi Santosh, Tony,
    >
    > On 7/29/20 6:02 AM, Grzegorz Jaszczyk wrote:
    >> Hi,
    >>
    >> The Programmable Real-Time Unit and Industrial Communication Subsystem
    >> (PRU-ICSS) is present on various TI SoCs. The IP is present on multiple TI SoC
    >> architecture families including the OMAP architecture SoCs such as AM33xx,
    >> AM437x and AM57xx; and on a Keystone 2 architecture based 66AK2G SoC. It is also
    >> present on the Davinci based OMAPL138 SoCs and K3 architecture based AM65x and
    >> J721E SoCs as well.
    >>
    >> A PRUSS consists of dual 32-bit RISC cores (Programmable Real-Time Units, or
    >> PRUs), shared RAM, data and instruction RAMs, some internal peripheral modules
    >> to facilitate industrial communication, and an interrupt controller.
    >>
    >> The programmable nature of the PRUs provide flexibility to implement custom
    >> peripheral interfaces, fast real-time responses, or specialized data handling.
    >> The common peripheral modules include the following,
    >> - an Ethernet MII_RT module with two MII ports
    >> - an MDIO port to control external Ethernet PHYs
    >> - an Industrial Ethernet Peripheral (IEP) to manage/generate Industrial
    >> Ethernet functions
    >> - an Enhanced Capture Module (eCAP)
    >> - an Industrial Ethernet Timer with 7/9 capture and 16 compare events
    >> - a 16550-compatible UART to support PROFIBUS
    >> - Enhanced GPIO with async capture and serial support
    >>
    >>
    >> A typical usage scenario would be to load the application firmware into one or
    >> more of the PRU cores, initialize one or more of the peripherals and perform I/O
    >> through shared RAM from either a kernel driver or directly from userspace.
    >>
    >> This series contains the PRUSS platform driver. This is the parent driver for
    >> the entire PRUSS and is used for managing the subsystem level resources like
    >> various memories and the CFG module. It is responsible for the creation and
    >> deletion of the platform devices for the child PRU devices and other child
    >> devices (like Interrupt Controller, MDIO node and some syscon nodes) so that
    >> they can be managed by specific platform drivers.
    >>
    >> Grzegorz Jaszczyk (1):
    >> dt-bindings: soc: ti: Add TI PRUSS bindings
    >>
    >> Suman Anna (5):
    >> soc: ti: pruss: Add a platform driver for PRUSS in TI SoCs
    >> soc: ti: pruss: Add support for PRU-ICSSs on AM437x SoCs
    >> soc: ti: pruss: Add support for PRU-ICSS subsystems on AM57xx SoCs
    >> soc: ti: pruss: Add support for PRU-ICSS subsystems on 66AK2G SoC
    >> soc: ti: pruss: enable support for ICSSG subsystems on K3 AM65x SoCs
    >
    > Do you have any comments on the driver portions of this series before Greg posts
    > a v2 addressing the binding comments. This is one of the foundation series
    > towards enabling PRUSS, and is a dependency for the PRU remoteproc driver.
    >
    No just post V2 addressing Rob's comment. I will line it up once
    rob acks it.

    Regards,
    Santosh

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