Hi, The following v2 of the series provides a base driver for the support of TI's message manager hardware block which facilitates communication between multiple compute engines(or processors) with a central system controller (called PMMC in K2G SoC). Keystone family of TI processors incorporate this solution starting with K2G[1]. The hardware specification is available here: http://www.ti.com/lit/ug/spruhy8/spruhy8.pdf Chapter 8.1 (Message Manager - NOTE: complete chapter update is estimated to be somewhere in March '16 - This does not seem done as of this writing). Starting with K2G SoC, TI Keystone architecture is moving towards an architecture similar to ARM Juno platform with a centralized system controller where all system control takes place - all power management and system control functions are now centralized in this system controller. A protocol called TI-SCI (TI System Control Interface) is built on top of this mailbox driver providing for communication protocol (similar to SCPI drivers/firmware/arm_scpi.c) Follow on patches (once the message manager is accepted) will enable the same. However, an 4.1 kernel based vendor kernel implementation is available at [2]. The following series is functional in TI vendor kernel, however, was tested on K2G EVM using the following test fragment: http://pastebin.ubuntu.com/15209502/ Boot log: http://pastebin.ubuntu.com/15405132/ baseline: next-20160316 Changes since v2: - driver update for review comments from Jassi. v2: http://marc.info/?l=linux-kernel&m=145652549004201&w=2 v1: http://marc.info/?l=devicetree&m=145469015018996&w=2 Nishanth Menon (2): Documentation: dt: mailbox: Add TI Message Manager mailbox: Introduce TI message manager driver .../bindings/mailbox/ti,message-manager.txt | 50 ++ drivers/mailbox/Kconfig | 11 + drivers/mailbox/Makefile | 2 + drivers/mailbox/ti-msgmgr.c | 639 +++++++++++++++++++++ include/linux/soc/ti/ti-msgmgr.h | 35 ++ 5 files changed, 737 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/ti,message-manager.txt create mode 100644 drivers/mailbox/ti-msgmgr.c create mode 100644 include/linux/soc/ti/ti-msgmgr.h [1] K2G support https://patchwork.kernel.org/patch/8196481/ https://patchwork.kernel.org/patch/8196491/ https://patchwork.kernel.org/patch/8196471/ [2] TISCI support(for reference): (mailbox client driver) http://git.ti.com/ti-linux-kernel/ti-linux-kernel/blobs/ti-lsk-linux-4.1.y/Documentation/devicetree/bindings/arm/keystone/ti,sci.txt http://git.ti.com/ti-linux-kernel/ti-linux-kernel/blobs/ti-lsk-linux-4.1.y/drivers/firmware/ti_sci.c http://git.ti.com/ti-linux-kernel/ti-linux-kernel/blobs/ti-lsk-linux-4.1.y/drivers/firmware/ti_sci.h http://git.ti.com/ti-linux-kernel/ti-linux-kernel/blobs/ti-lsk-linux-4.1.y/include/linux/ti_sci_protocol.h The above protocol is used for clock, generic powerdomain, reset etc.. -- 2.8.0.rc3 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
