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 -- 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