[PATCH V3 0/2] mailbox: Introduce Texas Instrument's message manager driver
From: Nishanth Menon
Date: Wed Mar 16 2016 - 20:24:13 EST
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.
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
The following series is functional in TI vendor kernel, however, was
tested on K2G EVM using the following test fragment:
Boot log: http://pastebin.ubuntu.com/15405132/
Changes since v2:
- driver update for review comments from Jassi.
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
 K2G support
 TISCI support(for reference): (mailbox client driver)
The above protocol is used for clock, generic powerdomain, reset etc..