# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/firmware/qcom,scm.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: QCOM Secure Channel Manager (SCM)
description: |
Qualcomm processors include an interface to communicate to the secure firmware.
This interface allows for clients to request different types of actions.
These can include CPU power up/down, HDCP requests, loading of firmware,
and other assorted actions.
maintainers:
- Bjorn Andersson <[email protected]>
- Robert Marko <[email protected]>
- Guru Das Srinagesh <[email protected]>
properties:
compatible:
items:
- enum:
- qcom,scm-apq8064
- qcom,scm-apq8084
- qcom,scm-ipq4019
- qcom,scm-ipq5018
- qcom,scm-ipq5332
- qcom,scm-ipq6018
- qcom,scm-ipq806x
- qcom,scm-ipq8074
- qcom,scm-ipq9574
- qcom,scm-mdm9607
- qcom,scm-msm8226
- qcom,scm-msm8660
- qcom,scm-msm8916
- qcom,scm-msm8953
- qcom,scm-msm8960
- qcom,scm-msm8974
- qcom,scm-msm8976
- qcom,scm-msm8994
- qcom,scm-msm8996
- qcom,scm-msm8998
- qcom,scm-qcm2290
- qcom,scm-qdu1000
- qcom,scm-sa8775p
- qcom,scm-sc7180
- qcom,scm-sc7280
- qcom,scm-sc8180x
- qcom,scm-sc8280xp
- qcom,scm-sdm670
- qcom,scm-sdm845
- qcom,scm-sdx55
- qcom,scm-sdx65
- qcom,scm-sdx75
- qcom,scm-sm6115
- qcom,scm-sm6125
- qcom,scm-sm6350
- qcom,scm-sm6375
- qcom,scm-sm7150
- qcom,scm-sm8150
- qcom,scm-sm8250
- qcom,scm-sm8350
- qcom,scm-sm8450
- qcom,scm-sm8550
- qcom,scm-sm8650
- qcom,scm-qcs404
- qcom,scm-x1e80100
- const: qcom,scm
clocks:
minItems: 1
maxItems: 3
clock-names:
minItems: 1
maxItems: 3
dma-coherent: true
interconnects:
maxItems: 1
interconnect-names:
maxItems: 1
'#reset-cells':
const: 1
interrupts:
description:
The wait-queue interrupt that firmware raises as part of handshake
protocol to handle sleeping SCM calls.
maxItems: 1
memory-region:
description:
Phandle to the memory region reserved for the shared memory bridge to TZ.
maxItems: 1
qcom,sdi-enabled:
description:
Indicates that the SDI (Secure Debug Image) has been enabled by TZ
by default and it needs to be disabled.
If not disabled WDT assertion or reboot will cause the board to hang
in the debug mode.
type: boolean
qcom,dload-mode:
$ref: /schemas/types.yaml#/definitions/phandle-array
items:
- items:
- description: phandle to TCSR hardware block
- description: offset of the download mode control register
description: TCSR hardware block
allOf:
# Clocks
- if:
properties:
compatible:
contains:
enum:
- qcom,scm-apq8064
- qcom,scm-apq8084
- qcom,scm-mdm9607
- qcom,scm-msm8226
- qcom,scm-msm8660
- qcom,scm-msm8916
- qcom,scm-msm8953
- qcom,scm-msm8960
- qcom,scm-msm8974
- qcom,scm-msm8976
- qcom,scm-qcm2290
- qcom,scm-sm6375
then:
required:
- clocks
- clock-names
else:
properties:
clock-names: false
clocks: false
- if:
properties:
compatible:
contains:
enum:
- qcom,scm-apq8064
- qcom,scm-msm8660
- qcom,scm-msm8960
- qcom,scm-qcm2290
- qcom,scm-sm6375
then:
properties:
clock-names:
items:
- const: core
clocks:
maxItems: 1
- if:
properties:
compatible:
contains:
enum:
- qcom,scm-apq8084
- qcom,scm-mdm9607
- qcom,scm-msm8226
- qcom,scm-msm8916
- qcom,scm-msm8953
- qcom,scm-msm8974
- qcom,scm-msm8976
then:
properties:
clock-names:
items:
- const: core
- const: bus
- const: iface
clocks:
minItems: 3
maxItems: 3
# Interrupts
- if:
not:
properties:
compatible:
contains:
enum:
- qcom,scm-sm8450
- qcom,scm-sm8550
- qcom,scm-sm8650
then:
properties:
interrupts: false
- if:
not:
properties:
compatible:
contains:
enum:
- qcom,scm-sa8775p
then:
properties:
memory-region: false
required:
- compatible
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/qcom,gcc-msm8916.h>
firmware {
scm {
compatible = "qcom,scm-msm8916", "qcom,scm";
clocks = <&gcc GCC_CRYPTO_CLK>,
<&gcc GCC_CRYPTO_AXI_CLK>,
<&gcc GCC_CRYPTO_AHB_CLK>;
clock-names = "core", "bus", "iface";
};
};
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