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authorSascha Hauer <s.hauer@pengutronix.de>2021-08-09 21:17:51 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2021-08-09 21:17:51 +0200
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dts: update to v5.14-rc1
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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-Texas Instruments System Control Interface (TI-SCI) Message Protocol
---------------------------------------------------------------------
-
-Texas Instrument's processors including those belonging to Keystone generation
-of processors have separate hardware entity which is now responsible for the
-management of the System on Chip (SoC) system. These include various system
-level functions as well.
-
-An example of such an SoC is K2G, which contains the system control hardware
-block called Power Management Micro Controller (PMMC). This hardware block is
-initialized early into boot process and provides services to Operating Systems
-on multiple processors including ones running Linux.
-
-See http://processors.wiki.ti.com/index.php/TISCI for protocol definition.
-
-TI-SCI controller Device Node:
-=============================
-
-The TI-SCI node describes the Texas Instrument's System Controller entity node.
-This parent node may optionally have additional children nodes which describe
-specific functionality such as clocks, power domain, reset or additional
-functionality as may be required for the SoC. This hierarchy also describes the
-relationship between the TI-SCI parent node to the child node.
-
-Required properties:
--------------------
-- compatible: should be "ti,k2g-sci" for TI 66AK2G SoC
- should be "ti,am654-sci" for for TI AM654 SoC
-- mbox-names:
- "rx" - Mailbox corresponding to receive path
- "tx" - Mailbox corresponding to transmit path
-
-- mboxes: Mailboxes corresponding to the mbox-names. Each value of the mboxes
- property should contain a phandle to the mailbox controller device
- node and an args specifier that will be the phandle to the intended
- sub-mailbox child node to be used for communication.
-
-See Documentation/devicetree/bindings/mailbox/mailbox.txt for more details
-about the generic mailbox controller and client driver bindings. Also see
-Documentation/devicetree/bindings/mailbox/ti,message-manager.txt for typical
-controller that is used to communicate with this System controllers.
-
-Optional Properties:
--------------------
-- reg-names:
- debug_messages - Map the Debug message region
-- reg: register space corresponding to the debug_messages
-- ti,system-reboot-controller: If system reboot can be triggered by SoC reboot
-- ti,host-id: Integer value corresponding to the host ID assigned by Firmware
- for identification of host processing entities such as virtual
- machines
-
-Example (K2G):
--------------
- pmmc: pmmc {
- compatible = "ti,k2g-sci";
- ti,host-id = <2>;
- mbox-names = "rx", "tx";
- mboxes= <&msgmgr &msgmgr_proxy_pmmc_rx>,
- <&msgmgr &msgmgr_proxy_pmmc_tx>;
- reg-names = "debug_messages";
- reg = <0x02921800 0x800>;
- };
-
-
-TI-SCI Client Device Node:
-=========================
-
-Client nodes are maintained as children of the relevant TI-SCI device node.
-
-Example (K2G):
--------------
- pmmc: pmmc {
- compatible = "ti,k2g-sci";
- ...
-
- my_clk_node: clk_node {
- ...
- ...
- };
-
- my_pd_node: pd_node {
- ...
- ...
- };
- };