linux-kernel - [PATCH V2 0/2] mailbox: Introduce Texas Instrument's message manager driver

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Message-ID: <1456525452-30638-1-git-send-email-nm@ti.com>
Date:	Fri, 26 Feb 2016 16:24:10 -0600
From:	Nishanth Menon <nm@...com>
To:	Jassi Brar <jassisinghbrar@...il.com>,
	Rob Herring <robh+dt@...nel.org>
CC:	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	Santosh Shilimkar <ssantosh@...nel.org>, <fcooper@...com>,
	<s-anna@...com>, Nishanth Menon <nm@...com>
Subject: [PATCH V2 0/2] mailbox: Introduce Texas Instrument's message manager driver

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 around
March '16).

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/15209436/

baseline: v4.5-rc1

Changes since v1:
	- dt binding has been majorly upgraded
	- driver updates for the bindings
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                        | 657 +++++++++++++++++++++
 include/linux/ti-msgmgr.h                          |  35 ++
 5 files changed, 755 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