[PATCH 0/2] mailbox: Introduce Texas Instrument's message manager driver

[Nishanth Menon]

Hi,

The following 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).

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 patch:
http://pastebin.ubuntu.com/14872857/
Boot log: http://pastebin.ubuntu.com/14872879/

baseline: v4.5-rc1

This could potentially be a targetted for v4.6-rc1 kernel.

Nishanth Menon (2):
  Documentation: dt: mailbox: Add TI Message Manager
  mailbox: Introduce TI message manager driver

 .../bindings/mailbox/ti,message-manager.txt        |  72 +++
 drivers/mailbox/Kconfig                            |  11 +
 drivers/mailbox/Makefile                           |   2 +
 drivers/mailbox/ti-msgmgr.c                        | 603 +++++++++++++++++++++
 include/linux/ti-msgmgr.h                          |  35 ++
 5 files changed, 723 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/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..

-- 
2.7.0