[PATCH v3] dt-bindings: arm: Convert PMU binding to json-schema
From: Rob Herring
Date: Thu Jan 10 2019 - 17:16:45 EST
Convert ARM PMU binding to DT schema format using json-schema.
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: devicetree@xxxxxxxxxxxxxxx
Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
---
v3:
- Don't allow arm,cortex-a15-pmu to be a fallback for arm,cortex-a7-pmu
- Update MAINTAINERS
Will, you can take this.
Documentation/devicetree/bindings/arm/pmu.txt | 70 ---------------
.../devicetree/bindings/arm/pmu.yaml | 87 +++++++++++++++++++
MAINTAINERS | 2 +-
3 files changed, 88 insertions(+), 71 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/arm/pmu.txt
create mode 100644 Documentation/devicetree/bindings/arm/pmu.yaml
diff --git a/Documentation/devicetree/bindings/arm/pmu.txt b/Documentation/devicetree/bindings/arm/pmu.txt
deleted file mode 100644
index 13611a8199bb..000000000000
--- a/Documentation/devicetree/bindings/arm/pmu.txt
+++ /dev/null
@@ -1,70 +0,0 @@
-* ARM Performance Monitor Units
-
-ARM cores often have a PMU for counting cpu and cache events like cache misses
-and hits. The interface to the PMU is part of the ARM ARM. The ARM PMU
-representation in the device tree should be done as under:-
-
-Required properties:
-
-- compatible : should be one of
- "apm,potenza-pmu"
- "arm,armv8-pmuv3"
- "arm,cortex-a73-pmu"
- "arm,cortex-a72-pmu"
- "arm,cortex-a57-pmu"
- "arm,cortex-a53-pmu"
- "arm,cortex-a35-pmu"
- "arm,cortex-a17-pmu"
- "arm,cortex-a15-pmu"
- "arm,cortex-a12-pmu"
- "arm,cortex-a9-pmu"
- "arm,cortex-a8-pmu"
- "arm,cortex-a7-pmu"
- "arm,cortex-a5-pmu"
- "arm,arm11mpcore-pmu"
- "arm,arm1176-pmu"
- "arm,arm1136-pmu"
- "brcm,vulcan-pmu"
- "cavium,thunder-pmu"
- "qcom,scorpion-pmu"
- "qcom,scorpion-mp-pmu"
- "qcom,krait-pmu"
-- interrupts : 1 combined interrupt or 1 per core. If the interrupt is a per-cpu
- interrupt (PPI) then 1 interrupt should be specified.
-
-Optional properties:
-
-- interrupt-affinity : When using SPIs, specifies a list of phandles to CPU
- nodes corresponding directly to the affinity of
- the SPIs listed in the interrupts property.
-
- When using a PPI, specifies a list of phandles to CPU
- nodes corresponding to the set of CPUs which have
- a PMU of this type signalling the PPI listed in the
- interrupts property, unless this is already specified
- by the PPI interrupt specifier itself (in which case
- the interrupt-affinity property shouldn't be present).
-
- This property should be present when there is more than
- a single SPI.
-
-
-- qcom,no-pc-write : Indicates that this PMU doesn't support the 0xc and 0xd
- events.
-
-- secure-reg-access : Indicates that the ARMv7 Secure Debug Enable Register
- (SDER) is accessible. This will cause the driver to do
- any setup required that is only possible in ARMv7 secure
- state. If not present the ARMv7 SDER will not be touched,
- which means the PMU may fail to operate unless external
- code (bootloader or security monitor) has performed the
- appropriate initialisation. Note that this property is
- not valid for non-ARMv7 CPUs or ARMv7 CPUs booting Linux
- in Non-secure state.
-
-Example:
-
-pmu {
- compatible = "arm,cortex-a9-pmu";
- interrupts = <100 101>;
-};
diff --git a/Documentation/devicetree/bindings/arm/pmu.yaml b/Documentation/devicetree/bindings/arm/pmu.yaml
new file mode 100644
index 000000000000..52ae094ce330
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/pmu.yaml
@@ -0,0 +1,87 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/pmu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM Performance Monitor Units
+
+maintainers:
+ - Mark Rutland <mark.rutland@xxxxxxx>
+ - Will Deacon <will.deacon@xxxxxxx>
+
+description: |+
+ ARM cores often have a PMU for counting cpu and cache events like cache misses
+ and hits. The interface to the PMU is part of the ARM ARM. The ARM PMU
+ representation in the device tree should be done as under:-
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - apm,potenza-pmu
+ - arm,armv8-pmuv3
+ - arm,cortex-a73-pmu
+ - arm,cortex-a72-pmu
+ - arm,cortex-a57-pmu
+ - arm,cortex-a53-pmu
+ - arm,cortex-a35-pmu
+ - arm,cortex-a17-pmu
+ - arm,cortex-a15-pmu
+ - arm,cortex-a12-pmu
+ - arm,cortex-a9-pmu
+ - arm,cortex-a8-pmu
+ - arm,cortex-a7-pmu
+ - arm,cortex-a5-pmu
+ - arm,arm11mpcore-pmu
+ - arm,arm1176-pmu
+ - arm,arm1136-pmu
+ - brcm,vulcan-pmu
+ - cavium,thunder-pmu
+ - qcom,scorpion-pmu
+ - qcom,scorpion-mp-pmu
+ - qcom,krait-pmu
+
+ interrupts:
+ # Don't know how many CPUs, so no constraints to specify
+ description: 1 per-cpu interrupt (PPI) or 1 interrupt per core.
+
+ interrupt-affinity:
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+ description:
+ When using SPIs, specifies a list of phandles to CPU
+ nodes corresponding directly to the affinity of
+ the SPIs listed in the interrupts property.
+
+ When using a PPI, specifies a list of phandles to CPU
+ nodes corresponding to the set of CPUs which have
+ a PMU of this type signalling the PPI listed in the
+ interrupts property, unless this is already specified
+ by the PPI interrupt specifier itself (in which case
+ the interrupt-affinity property shouldn't be present).
+
+ This property should be present when there is more than
+ a single SPI.
+
+ qcom,no-pc-write:
+ type: boolean
+ description:
+ Indicates that this PMU doesn't support the 0xc and 0xd events.
+
+ secure-reg-access:
+ type: boolean
+ description:
+ Indicates that the ARMv7 Secure Debug Enable Register
+ (SDER) is accessible. This will cause the driver to do
+ any setup required that is only possible in ARMv7 secure
+ state. If not present the ARMv7 SDER will not be touched,
+ which means the PMU may fail to operate unless external
+ code (bootloader or security monitor) has performed the
+ appropriate initialisation. Note that this property is
+ not valid for non-ARMv7 CPUs or ARMv7 CPUs booting Linux
+ in Non-secure state.
+
+required:
+ - compatible
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 39fcdbf38969..3f15010e5883 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1159,7 +1159,7 @@ F: arch/arm*/include/asm/hw_breakpoint.h
F: arch/arm*/include/asm/perf_event.h
F: drivers/perf/*
F: include/linux/perf/arm_pmu.h
-F: Documentation/devicetree/bindings/arm/pmu.txt
+F: Documentation/devicetree/bindings/arm/pmu.yaml
F: Documentation/devicetree/bindings/perf/
ARM PORT
--
2.19.1