108 lines
2.8 KiB
YAML
108 lines
2.8 KiB
YAML
|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
|
||
|
|
%YAML 1.2
|
||
|
|
---
|
||
|
|
$id: http://devicetree.org/schemas/soc/qcom/qcom,aoss-qmp.yaml#
|
||
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
||
|
|
|
||
|
|
title: Qualcomm Always-On Subsystem side channel binding
|
||
|
|
|
||
|
|
maintainers:
|
||
|
|
- Bjorn Andersson <bjorn.andersson@linaro.org>
|
||
|
|
|
||
|
|
description:
|
||
|
|
This binding describes the hardware component responsible for side channel
|
||
|
|
requests to the always-on subsystem (AOSS), used for certain power management
|
||
|
|
requests that is not handled by the standard RPMh interface. Each client in the
|
||
|
|
SoC has its own block of message RAM and IRQ for communication with the AOSS.
|
||
|
|
The protocol used to communicate in the message RAM is known as Qualcomm
|
||
|
|
Messaging Protocol (QMP)
|
||
|
|
|
||
|
|
The AOSS side channel exposes control over a set of resources, used to control
|
||
|
|
a set of debug related clocks and to affect the low power state of resources
|
||
|
|
related to the secondary subsystems.
|
||
|
|
|
||
|
|
properties:
|
||
|
|
compatible:
|
||
|
|
items:
|
||
|
|
- enum:
|
||
|
|
- qcom,sc7180-aoss-qmp
|
||
|
|
- qcom,sc7280-aoss-qmp
|
||
|
|
- qcom,sc8180x-aoss-qmp
|
||
|
|
- qcom,sdm845-aoss-qmp
|
||
|
|
- qcom,sm6350-aoss-qmp
|
||
|
|
- qcom,sm8150-aoss-qmp
|
||
|
|
- qcom,sm8250-aoss-qmp
|
||
|
|
- qcom,sm8350-aoss-qmp
|
||
|
|
- qcom,sm8450-aoss-qmp
|
||
|
|
- const: qcom,aoss-qmp
|
||
|
|
|
||
|
|
reg:
|
||
|
|
maxItems: 1
|
||
|
|
description:
|
||
|
|
The base address and size of the message RAM for this client's
|
||
|
|
communication with the AOSS
|
||
|
|
|
||
|
|
interrupts:
|
||
|
|
maxItems: 1
|
||
|
|
description:
|
||
|
|
Should specify the AOSS message IRQ for this client
|
||
|
|
|
||
|
|
mboxes:
|
||
|
|
maxItems: 1
|
||
|
|
description:
|
||
|
|
Reference to the mailbox representing the outgoing doorbell in APCS for
|
||
|
|
this client, as described in mailbox/mailbox.txt
|
||
|
|
|
||
|
|
"#clock-cells":
|
||
|
|
const: 0
|
||
|
|
description:
|
||
|
|
The single clock represents the QDSS clock.
|
||
|
|
|
||
|
|
required:
|
||
|
|
- compatible
|
||
|
|
- reg
|
||
|
|
- interrupts
|
||
|
|
- mboxes
|
||
|
|
- "#clock-cells"
|
||
|
|
|
||
|
|
additionalProperties: false
|
||
|
|
|
||
|
|
patternProperties:
|
||
|
|
"^(cx|mx|ebi)$":
|
||
|
|
type: object
|
||
|
|
description:
|
||
|
|
The AOSS side channel also provides the controls for three cooling devices,
|
||
|
|
these are expressed as subnodes of the QMP node. The name of the node is
|
||
|
|
used to identify the resource and must therefor be "cx", "mx" or "ebi".
|
||
|
|
|
||
|
|
properties:
|
||
|
|
"#cooling-cells":
|
||
|
|
const: 2
|
||
|
|
|
||
|
|
required:
|
||
|
|
- "#cooling-cells"
|
||
|
|
|
||
|
|
additionalProperties: false
|
||
|
|
|
||
|
|
examples:
|
||
|
|
- |
|
||
|
|
#include <dt-bindings/interrupt-controller/arm-gic.h>
|
||
|
|
|
||
|
|
aoss_qmp: qmp@c300000 {
|
||
|
|
compatible = "qcom,sdm845-aoss-qmp", "qcom,aoss-qmp";
|
||
|
|
reg = <0x0c300000 0x100000>;
|
||
|
|
interrupts = <GIC_SPI 389 IRQ_TYPE_EDGE_RISING>;
|
||
|
|
mboxes = <&apss_shared 0>;
|
||
|
|
|
||
|
|
#clock-cells = <0>;
|
||
|
|
|
||
|
|
cx_cdev: cx {
|
||
|
|
#cooling-cells = <2>;
|
||
|
|
};
|
||
|
|
|
||
|
|
mx_cdev: mx {
|
||
|
|
#cooling-cells = <2>;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
...
|