[PATCH v3 2/2] arm64: dts: qcom: sm8550: add cpu OPP table with DDR, LLCC & L3 bandwidths

Aaron Kling via B4 Relay
2026-02-20T04:07:50Z

From: Aaron Kling <webgeek1234@gmail.com>

Add the OPP tables for each CPU clusters (cpu0-1-2, cpu3-4-5-6 & cpu7)
to permit scaling the Last Level Cache Controller (LLCC), DDR and L3 cache
frequency by aggregating bandwidth requests of all CPU core with referenc
to the current OPP they are configured in by the LMH/EPSS hardware.

The effect is a proper caches & DDR frequency scaling when CPU cores
changes frequency.

The OPP tables were built using the downstream memlat ddr, llcc & l3
tables for each cluster types with the actual EPSS cpufreq LUT tables
from running a QCS8550 device.

Also add the OSC L3 Cache controller node.

Also add the interconnect entry for each cpu, with 3 different paths:
- CPU to Last Level Cache Controller (LLCC)
- Last Level Cache Controller (LLCC) to DDR
- L3 Cache from CPU to DDR interface

Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-HDK
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
arch/arm64/boot/dts/qcom/sm8550.dtsi | 367 +++++++++++++++++++++++++++++++++++
1 file changed, 367 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
index e3f93f4f412ded9583a6bc9215185a0daf5f1b57..de4d43f7b8d2416997db70c98b0fc36d25f3c2a6 100644
--- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
@@ -17,6 +17,7 @@
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/interconnect/qcom,icc.h>
#include <dt-bindings/interconnect/qcom,sm8550-rpmh.h>
+#include <dt-bindings/interconnect/qcom,osm-l3.h>
#include <dt-bindings/mailbox/qcom-ipcc.h>
#include <dt-bindings/power/qcom-rpmpd.h>
#include <dt-bindings/power/qcom,rpmhpd.h>
@@ -78,6 +79,13 @@ cpu0: cpu@0 {
qcom,freq-domain = <&cpufreq_hw 0>;
capacity-dmips-mhz = <1024>;
dynamic-power-coefficient = <100>;
+ operating-points-v2 = <&cpu0_opp_table>;
+ interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+ &gem_noc SLAVE_LLCC QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&mc_virt MASTER_LLCC QCOM_ICC_TAG_ACTIVE_ONLY
+ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&epss_l3 MASTER_EPSS_L3_APPS
+ &epss_l3 SLAVE_EPSS_L3_SHARED>;
#cooling-cells = <2>;
l2_0: l2-cache {
compatible = "cache";
@@ -104,6 +112,13 @@ cpu1: cpu@100 {
qcom,freq-domain = <&cpufreq_hw 0>;
capacity-dmips-mhz = <1024>;
dynamic-power-coefficient = <100>;
+ operating-points-v2 = <&cpu0_opp_table>;
+ interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+ &gem_noc SLAVE_LLCC QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&mc_virt MASTER_LLCC QCOM_ICC_TAG_ACTIVE_ONLY
+ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&epss_l3 MASTER_EPSS_L3_APPS
+ &epss_l3 SLAVE_EPSS_L3_SHARED>;
#cooling-cells = <2>;
l2_100: l2-cache {
compatible = "cache";
@@ -125,6 +140,13 @@ cpu2: cpu@200 {
qcom,freq-domain = <&cpufreq_hw 0>;
capacity-dmips-mhz = <1024>;
dynamic-power-coefficient = <100>;
+ operating-points-v2 = <&cpu0_opp_table>;
+ interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+ &gem_noc SLAVE_LLCC QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&mc_virt MASTER_LLCC QCOM_ICC_TAG_ACTIVE_ONLY
+ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&epss_l3 MASTER_EPSS_L3_APPS
+ &epss_l3 SLAVE_EPSS_L3_SHARED>;
#cooling-cells = <2>;
l2_200: l2-cache {
compatible = "cache";
@@ -146,6 +168,13 @@ cpu3: cpu@300 {
qcom,freq-domain = <&cpufreq_hw 1>;
capacity-dmips-mhz = <1792>;
dynamic-power-coefficient = <270>;
+ operating-points-v2 = <&cpu3_opp_table>;
+ interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+ &gem_noc SLAVE_LLCC QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&mc_virt MASTER_LLCC QCOM_ICC_TAG_ACTIVE_ONLY
+ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&epss_l3 MASTER_EPSS_L3_APPS
+ &epss_l3 SLAVE_EPSS_L3_SHARED>;
#cooling-cells = <2>;
l2_300: l2-cache {
compatible = "cache";
@@ -167,6 +196,13 @@ cpu4: cpu@400 {
qcom,freq-domain = <&cpufreq_hw 1>;
capacity-dmips-mhz = <1792>;
dynamic-power-coefficient = <270>;
+ operating-points-v2 = <&cpu3_opp_table>;
+ interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+ &gem_noc SLAVE_LLCC QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&mc_virt MASTER_LLCC QCOM_ICC_TAG_ACTIVE_ONLY
+ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&epss_l3 MASTER_EPSS_L3_APPS
+ &epss_l3 SLAVE_EPSS_L3_SHARED>;
#cooling-cells = <2>;
l2_400: l2-cache {
compatible = "cache";
@@ -188,6 +224,13 @@ cpu5: cpu@500 {
qcom,freq-domain = <&cpufreq_hw 1>;
capacity-dmips-mhz = <1792>;
dynamic-power-coefficient = <270>;
+ operating-points-v2 = <&cpu3_opp_table>;
+ interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+ &gem_noc SLAVE_LLCC QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&mc_virt MASTER_LLCC QCOM_ICC_TAG_ACTIVE_ONLY
+ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&epss_l3 MASTER_EPSS_L3_APPS
+ &epss_l3 SLAVE_EPSS_L3_SHARED>;
#cooling-cells = <2>;
l2_500: l2-cache {
compatible = "cache";
@@ -209,6 +252,13 @@ cpu6: cpu@600 {
qcom,freq-domain = <&cpufreq_hw 1>;
capacity-dmips-mhz = <1792>;
dynamic-power-coefficient = <270>;
+ operating-points-v2 = <&cpu3_opp_table>;
+ interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+ &gem_noc SLAVE_LLCC QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&mc_virt MASTER_LLCC QCOM_ICC_TAG_ACTIVE_ONLY
+ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&epss_l3 MASTER_EPSS_L3_APPS
+ &epss_l3 SLAVE_EPSS_L3_SHARED>;
#cooling-cells = <2>;
l2_600: l2-cache {
compatible = "cache";
@@ -230,6 +280,13 @@ cpu7: cpu@700 {
qcom,freq-domain = <&cpufreq_hw 2>;
capacity-dmips-mhz = <1894>;
dynamic-power-coefficient = <588>;
+ operating-points-v2 = <&cpu7_opp_table>;
+ interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+ &gem_noc SLAVE_LLCC QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&mc_virt MASTER_LLCC QCOM_ICC_TAG_ACTIVE_ONLY
+ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+ <&epss_l3 MASTER_EPSS_L3_APPS
+ &epss_l3 SLAVE_EPSS_L3_SHARED>;
#cooling-cells = <2>;
l2_700: l2-cache {
compatible = "cache";
@@ -397,6 +454,306 @@ memory@a0000000 {
reg = <0 0xa0000000 0 0>;
};

+ cpu0_opp_table: opp-table-cpu0 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-307200000 {
+ opp-hz = /bits/ 64 <307200000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (307200 * 32)>;
+ };
+
+ opp-441600000 {
+ opp-hz = /bits/ 64 <441600000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (384000 * 32)>;
+ };
+
+ opp-556800000 {
+ opp-hz = /bits/ 64 <556800000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (499200 * 32)>;
+ };
+
+ opp-672000000 {
+ opp-hz = /bits/ 64 <672000000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (499200 * 32)>;
+ };
+
+ opp-787200000 {
+ opp-hz = /bits/ 64 <787200000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (729600 * 32)>;
+ };
+
+ opp-902400000 {
+ opp-hz = /bits/ 64 <902400000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (844800 * 32)>;
+ };
+
+ opp-1017600000 {
+ opp-hz = /bits/ 64 <1017600000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (940800 * 32)>;
+ };
+
+ opp-1113600000 {
+ opp-hz = /bits/ 64 <1113600000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (1056000 * 32)>;
+ };
+
+ opp-1228800000 {
+ opp-hz = /bits/ 64 <1228800000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (1152000 * 32)>;
+ };
+
+ opp-1344000000 {
+ opp-hz = /bits/ 64 <1344000000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (1267200 * 32)>;
+ };
+
+ opp-1459200000 {
+ opp-hz = /bits/ 64 <1459200000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (1267200 * 32)>;
+ };
+
+ opp-1555200000 {
+ opp-hz = /bits/ 64 <1555200000>;
+ opp-peak-kBps = <(466000 * 16) (768000 * 4) (1478400 * 32)>;
+ };
+
+ opp-1670400000 {
+ opp-hz = /bits/ 64 <1670400000>;
+ opp-peak-kBps = <(466000 * 16) (768000 * 4) (1478400 * 32)>;
+ };
+
+ opp-1785600000 {
+ opp-hz = /bits/ 64 <1785600000>;
+ opp-peak-kBps = <(466000 * 16) (768000 * 4) (1478400 * 32)>;
+ };
+
+ opp-1900800000 {
+ opp-hz = /bits/ 64 <1900800000>;
+ opp-peak-kBps = <(466000 * 16) (768000 * 4) (1689600 * 32)>;
+ };
+
+ opp-2016000000 {
+ opp-hz = /bits/ 64 <2016000000>;
+ opp-peak-kBps = <(600000 * 16) (1555000 * 4) (1804800 * 32)>;
+ };
+ };
+
+ cpu3_opp_table: opp-table-cpu3 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-499200000 {
+ opp-hz = /bits/ 64 <499200000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (307200 * 32)>;
+ };
+
+ opp-614400000 {
+ opp-hz = /bits/ 64 <614400000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (499200 * 32)>;
+ };
+
+ opp-729600000 {
+ opp-hz = /bits/ 64 <729600000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (499200 * 32)>;
+ };
+
+ opp-844800000 {
+ opp-hz = /bits/ 64 <844800000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (499200 * 32)>;
+ };
+
+ opp-940800000 {
+ opp-hz = /bits/ 64 <940800000>;
+ opp-peak-kBps = <(300000 * 16) (768000 * 4) (729600 * 32)>;
+ };
+
+ opp-1056000000 {
+ opp-hz = /bits/ 64 <1056000000>;
+ opp-peak-kBps = <(300000 * 16) (768000 * 4) (729600 * 32)>;
+ };
+
+ opp-1171200000 {
+ opp-hz = /bits/ 64 <1171200000>;
+ opp-peak-kBps = <(466000 * 16) (1555000 * 4) (940800 * 32)>;
+ };
+
+ opp-1286400000 {
+ opp-hz = /bits/ 64 <1286400000>;
+ opp-peak-kBps = <(466000 * 16) (1555000 * 4) (940800 * 32)>;
+ };
+
+ opp-1401600000 {
+ opp-hz = /bits/ 64 <1401600000>;
+ opp-peak-kBps = <(600000 * 16) (1708000 * 4) (1056000 * 32)>;
+ };
+
+ opp-1536000000 {
+ opp-hz = /bits/ 64 <1536000000>;
+ opp-peak-kBps = <(600000 * 16) (1708000 * 4) (1056000 * 32)>;
+ };
+
+ opp-1651200000 {
+ opp-hz = /bits/ 64 <1651200000>;
+ opp-peak-kBps = <(600000 * 16) (1708000 * 4) (1267200 * 32)>;
+ };
+
+ opp-1785600000 {
+ opp-hz = /bits/ 64 <1785600000>;
+ opp-peak-kBps = <(600000 * 16) (1708000 * 4) (1267200 * 32)>;
+ };
+
+ opp-1920000000 {
+ opp-hz = /bits/ 64 <1920000000>;
+ opp-peak-kBps = <(806000 * 16) (2736000 * 4) (1267200 * 32)>;
+ };
+
+ opp-2054400000 {
+ opp-hz = /bits/ 64 <2054400000>;
+ opp-peak-kBps = <(806000 * 16) (2736000 * 4) (1478400 * 32)>;
+ };
+
+ opp-2188800000 {
+ opp-hz = /bits/ 64 <2188800000>;
+ opp-peak-kBps = <(806000 * 16) (2736000 * 4) (1478400 * 32)>;
+ };
+
+ opp-2323200000 {
+ opp-hz = /bits/ 64 <2323200000>;
+ opp-peak-kBps = <(806000 * 16) (2736000 * 4) (1478400 * 32)>;
+ };
+
+ opp-2457600000 {
+ opp-hz = /bits/ 64 <2457600000>;
+ opp-peak-kBps = <(806000 * 16) (2736000 * 4) (1478400 * 32)>;
+ };
+
+ opp-2592000000 {
+ opp-hz = /bits/ 64 <2592000000>;
+ opp-peak-kBps = <(806000 * 16) (2736000 * 4) (1478400 * 32)>;
+ };
+
+ opp-2707200000 {
+ opp-hz = /bits/ 64 <2707200000>;
+ opp-peak-kBps = <(933000 * 16) (2736000 * 4) (1478400 * 32)>;
+ };
+
+ opp-2803200000 {
+ opp-hz = /bits/ 64 <2803200000>;
+ opp-peak-kBps = <(933000 * 16) (3686000 * 4) (1689600 * 32)>;
+ };
+ };
+
+ cpu7_opp_table: opp-table-cpu7 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-595200000 {
+ opp-hz = /bits/ 64 <595200000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (307200 * 32)>;
+ };
+
+ opp-729600000 {
+ opp-hz = /bits/ 64 <729600000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (499200 * 32)>;
+ };
+
+ opp-864000000 {
+ opp-hz = /bits/ 64 <864000000>;
+ opp-peak-kBps = <(300000 * 16) (547000 * 4) (499200 * 32)>;
+ };
+
+ opp-998400000 {
+ opp-hz = /bits/ 64 <998400000>;
+ opp-peak-kBps = <(300000 * 16) (768000 * 4) (729600 * 32)>;
+ };
+
+ opp-1132800000 {
+ opp-hz = /bits/ 64 <1132800000>;
+ opp-peak-kBps = <(300000 * 16) (768000 * 4) (729600 * 32)>;
+ };
+
+ opp-1248000000 {
+ opp-hz = /bits/ 64 <1248000000>;
+ opp-peak-kBps = <(466000 * 16) (1555000 * 4) (940800 * 32)>;
+ };
+
+ opp-1363200000 {
+ opp-hz = /bits/ 64 <1363200000>;
+ opp-peak-kBps = <(466000 * 16) (1555000 * 4) (940800 * 32)>;
+ };
+
+ opp-1478400000 {
+ opp-hz = /bits/ 64 <1478400000>;
+ opp-peak-kBps = <(600000 * 16) (1708000 * 4) (1056000 * 32)>;
+ };
+
+ opp-1593600000 {
+ opp-hz = /bits/ 64 <1593600000>;
+ opp-peak-kBps = <(600000 * 16) (1708000 * 4) (1056000 * 32)>;
+ };
+
+ opp-1708800000 {
+ opp-hz = /bits/ 64 <1708800000>;
+ opp-peak-kBps = <(600000 * 16) (1708000 * 4) (1267200 * 32)>;
+ };
+
+ opp-1843200000 {
+ opp-hz = /bits/ 64 <1843200000>;
+ opp-peak-kBps = <(600000 * 16) (1708000 * 4) (1267200 * 32)>;
+ };
+
+ opp-1977600000 {
+ opp-hz = /bits/ 64 <1977600000>;
+ opp-peak-kBps = <(806000 * 16) (2736000 * 4) (1267200 * 32)>;
+ };
+
+ opp-2092800000 {
+ opp-hz = /bits/ 64 <2092800000>;
+ opp-peak-kBps = <(806000 * 16) (2736000 * 4) (1478400 * 32)>;
+ };
+
+ opp-2227200000 {
+ opp-hz = /bits/ 64 <2227200000>;
+ opp-peak-kBps = <(806000 * 16) (2736000 * 4) (1478400 * 32)>;
+ };
+
+ opp-2342400000 {
+ opp-hz = /bits/ 64 <2342400000>;
+ opp-peak-kBps = <(806000 * 16) (2736000 * 4) (1478400 * 32)>;
+ };
+
+ opp-2476800000 {
+ opp-hz = /bits/ 64 <2476800000>;
+ opp-peak-kBps = <(806000 * 16) (2736000 * 4) (1478400 * 32)>;
+ };
+
+ opp-2592000000 {
+ opp-hz = /bits/ 64 <2592000000>;
+ opp-peak-kBps = <(806000 * 16) (2736000 * 4) (1478400 * 32)>;
+ };
+
+ opp-2726400000 {
+ opp-hz = /bits/ 64 <2726400000>;
+ opp-peak-kBps = <(933000 * 16) (3686000 * 4) (1478400 * 32)>;
+ };
+
+ opp-2841600000 {
+ opp-hz = /bits/ 64 <2841600000>;
+ opp-peak-kBps = <(933000 * 16) (3686000 * 4) (1689600 * 32)>;
+ };
+
+ opp-2956800000 {
+ opp-hz = /bits/ 64 <2956800000>;
+ opp-peak-kBps = <(933000 * 16) (3686000 * 4) (1689600 * 32)>;
+ };
+
+ opp-3187200000 {
+ opp-hz = /bits/ 64 <3187200000>;
+ opp-peak-kBps = <(933000 * 16) (3686000 * 4) (1689600 * 32)>;
+ };
+ };
+
pmu-a510 {
compatible = "arm,cortex-a510-pmu";
interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_LOW &ppi_cluster0>;
@@ -5437,6 +5794,16 @@ rpmhpd_opp_turbo_l1: opp-416 {
};
};

+ epss_l3: interconnect@17d90000 {
+ compatible = "qcom,sm8550-epss-l3", "qcom,epss-l3";
+ reg = <0 0x17d90000 0 0x1000>;
+
+ clocks = <&bi_tcxo_div2>, <&gcc GCC_GPLL0>;
+ clock-names = "xo", "alternate";
+
+ #interconnect-cells = <1>;
+ };
+
cpufreq_hw: cpufreq@17d91000 {
compatible = "qcom,sm8550-cpufreq-epss", "qcom,cpufreq-epss";
reg = <0 0x17d91000 0 0x1000>,

--
2.52.0