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Diffstat (limited to 'target/linux/ipq806x/patches-5.4/098-2-Documentation-cpufreq-add-qcom-krait-cpufreq-binding.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-5.4/098-2-Documentation-cpufreq-add-qcom-krait-cpufreq-binding.patch | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-5.4/098-2-Documentation-cpufreq-add-qcom-krait-cpufreq-binding.patch b/target/linux/ipq806x/patches-5.4/098-2-Documentation-cpufreq-add-qcom-krait-cpufreq-binding.patch new file mode 100644 index 0000000000..316e18b790 --- /dev/null +++ b/target/linux/ipq806x/patches-5.4/098-2-Documentation-cpufreq-add-qcom-krait-cpufreq-binding.patch @@ -0,0 +1,237 @@ +From c9ecd920324a647bf1f2b47f771c8f599cc7b551 Mon Sep 17 00:00:00 2001 +From: Ansuel Smith <ansuelsmth@gmail.com> +Date: Sat, 22 Feb 2020 18:02:17 +0100 +Subject: [PATCH 2/8] Documentation: cpufreq: add qcom,krait-cache bindings + +Document dedicated cpufreq for Krait CPUs. + +Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> +--- + .../bindings/cpufreq/qcom-cpufreq-krait.yaml | 221 ++++++++++++++++++ + 1 file changed, 221 insertions(+) + create mode 100644 Documentation/devicetree/bindings/cpufreq/qcom-cpufreq-krait.yaml + +--- /dev/null ++++ b/Documentation/devicetree/bindings/cpufreq/qcom-cpufreq-krait.yaml +@@ -0,0 +1,221 @@ ++# SPDX-License-Identifier: GPL-2.0 ++%YAML 1.2 ++--- ++$id: http://devicetree.org/schemas/cpufreq/qcom-cpufreq-krait.yaml# ++$schema: http://devicetree.org/meta-schemas/core.yaml# ++ ++title: CPU Frequency scaling driver for Krait SoCs ++ ++maintainers: ++ - Ansuel Smith <ansuelsmth@gmail.com> ++ ++description: | ++ The krait cpufreq driver is a dedicated frequency scaling driver ++ based on cpufreq-dt generic driver that scale L2 cache and the ++ cores. TEST ++ ++ The L2 cache is scaled based on the max clk across all cores and ++ the clock is decided based on the opp-level set in the device tree. ++ ++ Different core freq can be linked to a specific l2 freq and the driver ++ on frequency change will scale the core and the l2 clk based of the ++ linked freq. ++ ++ On Krait SoC is present a bug and on every L2 clk change the driver ++ needs to set the clk to the idle freq before changing it to the new value. ++ ++ This requires the qcom cpufreq nvmem driver to parse the different opp ++ core clk and an additional opp table for the l2 scaling. ++ ++ If the driver detect broken config (for example missing opp-level) the ++ cpufreq driver skips the l2 scaling ++ ++ Referring to this example opp-level can be used to link a range of cpu freq ++ to a specific l2 freq: ++ cpu opp freq 384000000 has opp-level 0 ++ l2 opp freq 384000000 has opp-level 0 ++ The driver will scale l2 to 384000000 ++ ++ cpu opp freq 600000000-1000000000 has opp-level 1 ++ l2 opp freq 1000000000 has opp-level 1 ++ The driver will scale l2 to 1000000000 ++ ++allOf: ++ - $ref: /schemas/cache-controller.yaml# ++ ++select: ++ properties: ++ compatible: ++ items: ++ - enum: ++ - qcom,krait-cache ++ ++ required: ++ - compatible ++ ++properties: ++ compatible: ++ items: ++ - const: qcom,krait-cache ++ - const: cache ++ ++ cache-level: ++ const: 2 ++ ++ clocks: ++ maxItems: 1 ++ ++ clock-names: ++ const: l2 ++ ++ l2-supply: true ++ ++ operating-points-v2: true ++ ++required: ++ - compatible ++ - cache-level ++ - clocks ++ - clock-names ++ - l2-supply ++ - operating-points-v2 ++ ++additionalProperties: false ++ ++examples: ++ - | ++ cpus { ++ #address-cells = <1>; ++ #size-cells = <0>; ++ ++ cpu0: cpu@0 { ++ compatible = "qcom,krait"; ++ enable-method = "qcom,kpss-acc-v1"; ++ device_type = "cpu"; ++ reg = <0>; ++ next-level-cache = <&L2>; ++ qcom,acc = <&acc0>; ++ qcom,saw = <&saw0>; ++ clocks = <&kraitcc 0>, <&kraitcc 4>; ++ clock-names = "cpu", "l2"; ++ clock-latency = <100000>; ++ cpu-supply = <&smb208_s2a>; ++ operating-points-v2 = <&opp_table0>; ++ voltage-tolerance = <5>; ++ cooling-min-state = <0>; ++ cooling-max-state = <10>; ++ #cooling-cells = <2>; ++ cpu-idle-states = <&CPU_SPC>; ++ }; ++ ++ /* ... */ ++ ++ }; ++ ++ opp_table0: opp_table0 { ++ compatible = "operating-points-v2-kryo-cpu"; ++ nvmem-cells = <&speedbin_efuse>; ++ ++ opp-384000000 { ++ opp-hz = /bits/ 64 <384000000>; ++ opp-microvolt-speed0-pvs0-v0 = <1000000>; ++ opp-microvolt-speed0-pvs1-v0 = <925000>; ++ opp-microvolt-speed0-pvs2-v0 = <875000>; ++ opp-microvolt-speed0-pvs3-v0 = <800000>; ++ opp-supported-hw = <0x1>; ++ clock-latency-ns = <100000>; ++ opp-level = <0>; ++ }; ++ ++ opp-600000000 { ++ opp-hz = /bits/ 64 <600000000>; ++ opp-microvolt-speed0-pvs0-v0 = <1050000>; ++ opp-microvolt-speed0-pvs1-v0 = <975000>; ++ opp-microvolt-speed0-pvs2-v0 = <925000>; ++ opp-microvolt-speed0-pvs3-v0 = <850000>; ++ opp-supported-hw = <0x1>; ++ clock-latency-ns = <100000>; ++ opp-level = <1>; ++ }; ++ ++ opp-800000000 { ++ opp-hz = /bits/ 64 <800000000>; ++ opp-microvolt-speed0-pvs0-v0 = <1100000>; ++ opp-microvolt-speed0-pvs1-v0 = <1025000>; ++ opp-microvolt-speed0-pvs2-v0 = <995000>; ++ opp-microvolt-speed0-pvs3-v0 = <900000>; ++ opp-supported-hw = <0x1>; ++ clock-latency-ns = <100000>; ++ opp-level = <1>; ++ }; ++ ++ opp-1000000000 { ++ opp-hz = /bits/ 64 <1000000000>; ++ opp-microvolt-speed0-pvs0-v0 = <1150000>; ++ opp-microvolt-speed0-pvs1-v0 = <1075000>; ++ opp-microvolt-speed0-pvs2-v0 = <1025000>; ++ opp-microvolt-speed0-pvs3-v0 = <950000>; ++ opp-supported-hw = <0x1>; ++ clock-latency-ns = <100000>; ++ opp-level = <1>; ++ }; ++ ++ opp-1200000000 { ++ opp-hz = /bits/ 64 <1200000000>; ++ opp-microvolt-speed0-pvs0-v0 = <1200000>; ++ opp-microvolt-speed0-pvs1-v0 = <1125000>; ++ opp-microvolt-speed0-pvs2-v0 = <1075000>; ++ opp-microvolt-speed0-pvs3-v0 = <1000000>; ++ opp-supported-hw = <0x1>; ++ clock-latency-ns = <100000>; ++ opp-level = <2>; ++ }; ++ ++ opp-1400000000 { ++ opp-hz = /bits/ 64 <1400000000>; ++ opp-microvolt-speed0-pvs0-v0 = <1250000>; ++ opp-microvolt-speed0-pvs1-v0 = <1175000>; ++ opp-microvolt-speed0-pvs2-v0 = <1125000>; ++ opp-microvolt-speed0-pvs3-v0 = <1050000>; ++ opp-supported-hw = <0x1>; ++ clock-latency-ns = <100000>; ++ opp-level = <2>; ++ }; ++ }; ++ ++ opp_table_l2: opp_table_l2 { ++ compatible = "operating-points-v2"; ++ ++ opp-384000000 { ++ opp-hz = /bits/ 64 <384000000>; ++ opp-microvolt = <1100000>; ++ clock-latency-ns = <100000>; ++ opp-level = <0>; ++ }; ++ opp-1000000000 { ++ opp-hz = /bits/ 64 <1000000000>; ++ opp-microvolt = <1100000>; ++ clock-latency-ns = <100000>; ++ opp-level = <1>; ++ }; ++ opp-1200000000 { ++ opp-hz = /bits/ 64 <1200000000>; ++ opp-microvolt = <1150000>; ++ clock-latency-ns = <100000>; ++ opp-level = <2>; ++ }; ++ }; ++ ++ soc { ++ L2: l2-cache { ++ compatible = "qcom,krait-cache", "cache"; ++ cache-level = <2>; ++ ++ clocks = <&kraitcc 4>; ++ clock-names = "l2"; ++ l2-supply = <&smb208_s1a>; ++ operating-points-v2 = <&opp_table_l2>; ++ }; ++ }; ++ ++... |