Commit 18a00620 authored by Andrew F. Davis's avatar Andrew F. Davis Committed by Philipp Zabel

dt-bindings: reset: Add TI SCI reset binding

Add TI SCI reset controller binding. This describes the DT binding
details for a reset controller node providing reset management services
to hardware blocks (reset consumers) using the Texas Instrument's System
Control Interface (TI SCI) protocol to communicate to a system controller
block present on the SoC.
Signed-off-by: default avatarAndrew F. Davis <afd@ti.com>
[s-anna@ti.com: revise the binding format]
Signed-off-by: default avatarSuman Anna <s-anna@ti.com>
Signed-off-by: default avatarNishanth Menon <nm@ti.com>
Acked-by: default avatarSantosh Shilimkar <ssantosh@kernel.org>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent d25e4334
Texas Instruments System Control Interface (TI-SCI) Reset Controller
=====================================================================
Some TI SoCs contain a system controller (like the Power Management Micro
Controller (PMMC) on Keystone 66AK2G SoC) that are responsible for controlling
the state of the various hardware modules present on the SoC. Communication
between the host processor running an OS and the system controller happens
through a protocol called TI System Control Interface (TI-SCI protocol).
For TI SCI details, please refer to the document,
Documentation/devicetree/bindings/arm/keystone/ti,sci.txt
TI-SCI Reset Controller Node
============================
This reset controller node uses the TI SCI protocol to perform the reset
management of various hardware modules present on the SoC. Must be a child
node of the associated TI-SCI system controller node.
Required properties:
--------------------
- compatible : Should be "ti,sci-reset"
- #reset-cells : Should be 2. Please see the reset consumer node below for
usage details.
TI-SCI Reset Consumer Nodes
===========================
Each of the reset consumer nodes should have the following properties,
in addition to their own properties.
Required properties:
--------------------
- resets : A phandle and reset specifier pair, one pair for each reset
signal that affects the device, or that the device manages.
The phandle should point to the TI-SCI reset controller node,
and the reset specifier should have 2 cell-values. The first
cell should contain the device ID. The second cell should
contain the reset mask value used by system controller.
Please refer to the protocol documentation for these values
to be used for different devices,
http://processors.wiki.ti.com/index.php/TISCI#66AK2G02_Data
Please also refer to Documentation/devicetree/bindings/reset/reset.txt for
common reset controller usage by consumers.
Example:
--------
The following example demonstrates both a TI-SCI reset controller node and a
consumer (a DSP device) on the 66AK2G SoC.
pmmc: pmmc {
compatible = "ti,k2g-sci";
k2g_reset: reset-controller {
compatible = "ti,sci-reset";
#reset-cells = <2>;
};
};
dsp0: dsp@10800000 {
...
resets = <&k2g_reset 0x0046 0x1>;
...
};
......@@ -12630,6 +12630,7 @@ F: include/linux/soc/ti/ti_sci_protocol.h
F: Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
F: include/dt-bindings/genpd/k2g.h
F: drivers/soc/ti/ti_sci_pm_domains.c
F: Documentation/devicetree/bindings/reset/ti,sci-reset.txt
THANKO'S RAREMONO AM/FM/SW RADIO RECEIVER USB DRIVER
M: Hans Verkuil <hverkuil@xs4all.nl>
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment