[PATCH 0/5] firmware: Add support for TI System Control Interface (TI-SCI) protocol driver

Nishanth Menon
2016-08-19T22:54:16Z

Hi,

Texas Instruments' Keystone generation System on Chips (SoC)
starting with 66AK2G02[1], now include a dedicated SoC System Control
entity called PMMC(Power Management Micro Controller) in line with
ARM architecture recommendations. The function of this module is
to integrate all system operations in a centralized location.
Communication with the SoC System Control entity from various
processing units like ARM/DSP occurs over Message Manager hardware
block.

This series adds the base support for TI System Control Interface
(TI-SCI) protocol[2]. The protocol is built on top of Texas
Instrument's Message Manager communication mechanism[3].

Overall architecture is very similar to SCPI[4] as follows:
+-------------+ +---------+ +------^-----+
| TI SCI GENPD| |TISCI Clk| |TISCI reset |
+------+------+ +----+----+ +------+-----+
| | |
| +----v--------------+ |
+----------> TISCI Protocol(*) <--+
+----+--------------+
|
+---v-----------+
| MAILBOX FWK |
+---+-----------+
|
+---v-----------+
| TI MSGMGR |-> TISCI hardware block
+---------------+

(*) This series.

NOTE: Given that this is fundamental to the Keystone generation of SoC
starting with K2G, I have taken the liberty of adding Santosh, Tero
and myself as maintainers to these driver. Do let me know if that is
not appropriate.

[1] http://www.ti.com/product/66ak2g02
[2] http://processors.wiki.ti.com/index.php/TISCI
[3] Documentation/devicetree/bindings/mailbox/ti,message-manager.txt
[4] Documentation/devicetree/bindings/arm/arm,scpi.txt

Baseline: v4.8-rc1
boot log: http://pastebin.ubuntu.com/23071570/ (with additional SoC specific dts patches)
Patches can also be found: https://github.com/nmenon/linux-2.6-playground/commits/upstream/v4.9/tisci-base-v1

PS: We believe the churn is done in the protocol over the last 2 TI
vendor kernel versions and minimal changes may be involved in the
future. Obviously, a lot of folks (especially Russ Dill) have been
involved in making this happen.. unfortunately, the list is a bit too
long to elaborate here :(

Nishanth Menon (5):
Documentation: Add support for TI System Control Interface (TI-SCI)
protocol
firmware: Add basic support for TI System Control Interface (TI-SCI)
protocol
firmware: ti_sci: Add support for Device control
firmware: ti_sci: Add support for Clock control
firmware: ti_sci: Add support for reboot core service

.../devicetree/bindings/arm/keystone/ti,sci.txt | 66 +
MAINTAINERS | 10 +
drivers/firmware/Kconfig | 15 +
drivers/firmware/Makefile | 1 +
drivers/firmware/ti_sci.c | 1993 ++++++++++++++++++++
drivers/firmware/ti_sci.h | 492 +++++
include/linux/soc/ti/ti_sci_protocol.h | 249 +++
7 files changed, 2826 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arm/keystone/ti,sci.txt
create mode 100644 drivers/firmware/ti_sci.c
create mode 100644 drivers/firmware/ti_sci.h
create mode 100644 include/linux/soc/ti/ti_sci_protocol.h

--
2.9.1.200.gb1ec08f