diff options
author | Jiucheng Xu <jiucheng.xu@amlogic.com> | 2022-11-21 05:16:00 +0300 |
---|---|---|
committer | Will Deacon <will@kernel.org> | 2022-11-21 21:28:45 +0300 |
commit | fd9678d3beaa5c78dfd878f67bc543f1702cc9d9 (patch) | |
tree | a01882f98b53f337c09e82415205eabdda2b7181 /Documentation/devicetree/bindings/perf | |
parent | 537216e59f0c126670749f8dc09f5c4f03375234 (diff) | |
download | linux-fd9678d3beaa5c78dfd878f67bc543f1702cc9d9.tar.xz |
dt-binding: perf: Add Amlogic DDR PMU
Add binding documentation for the Amlogic G12 series DDR
performance monitor unit.
Signed-off-by: Jiucheng Xu <jiucheng.xu@amlogic.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221121021602.3306998-3-jiucheng.xu@amlogic.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/perf')
-rw-r--r-- | Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml b/Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml new file mode 100644 index 000000000000..50f46a6898b1 --- /dev/null +++ b/Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml @@ -0,0 +1,54 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/perf/amlogic,g12-ddr-pmu.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Amlogic G12 DDR performance monitor + +maintainers: + - Jiucheng Xu <jiucheng.xu@amlogic.com> + +description: | + Amlogic G12 series SoC integrate DDR bandwidth monitor. + A timer is inside and can generate interrupt when timeout. + The bandwidth is counted in the timer ISR. Different platform + has different subset of event format attribute. + +properties: + compatible: + enum: + - amlogic,g12a-ddr-pmu + - amlogic,g12b-ddr-pmu + - amlogic,sm1-ddr-pmu + + reg: + items: + - description: DMC bandwidth register space. + - description: DMC PLL register space. + + interrupts: + items: + - description: The IRQ of the inside timer timeout. + +required: + - compatible + - reg + - interrupts + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + pmu { + #address-cells=<2>; + #size-cells=<2>; + + pmu@ff638000 { + compatible = "amlogic,g12a-ddr-pmu"; + reg = <0x0 0xff638000 0x0 0x100>, + <0x0 0xff638c00 0x0 0x100>; + interrupts = <GIC_SPI 52 IRQ_TYPE_EDGE_RISING>; + }; + }; |