[PATCH V2 0/3] Add EPSS L3 provider support on QCS8300 SoC

[PATCH V2 0/3] Add EPSS L3 provider support on QCS8300 SoC

[Raviteja Laggyshetty]

Add Epoch subsystem (EPSS) L3 scaling support on QCS8300 SoC.

Changes since v1:
 - Removed SoC specific compatible "qcom,qcs8300-epss-l3"
   from driver and used SA8775P SoC compatible as fallback in devicetree.
 - As the EPSS hardware in QCS8300 and SA8775P SoCs are same, a 
   family-specific compatible string for the SA8775P has been added to the
   bindings. This avoids the need to explicitly listing each SoC in the
   match table and the family-specific fallback compatible can be used 
   for SoCs sharing the same hardware.
 - As suggested by konrad, added EPSS path handles for CPU nodes.

Imran Shaik (1):
  arm64: dts: qcom: qcs8300: Add CPU OPP tables to scale DDR/L3

Raviteja Laggyshetty (2):
  dt-bindings: interconnect: Add EPSS L3 compatible for QCS8300 SoC
  arm64: dts: qcom: qcs8300: Add EPSS l3 interconnect provider node

 .../bindings/interconnect/qcom,osm-l3.yaml    |   5 +
 arch/arm64/boot/dts/qcom/qcs8300.dtsi         | 301 ++++++++++++++++++
 2 files changed, 306 insertions(+)

-- 
2.43.0

[PATCH V2 1/3] dt-bindings: interconnect: Add EPSS L3 compatible for QCS8300 SoC

[Raviteja Laggyshetty]

Add Epoch Subsystem (EPSS) L3 interconnect provider binding for
QCS8300 SoC. As the EPSS hardware in QCS8300 and SA8775P are same,
added a family-level compatible for SA877P SoC. This shared fallback
compatible allows grouping of SoCs with similar hardware, reducing
the need to explicitly list each variant in the driver match table.

Signed-off-by: Raviteja Laggyshetty <raviteja.laggyshetty@oss.qualcomm.com>
---
 .../devicetree/bindings/interconnect/qcom,osm-l3.yaml        | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/interconnect/qcom,osm-l3.yaml b/Documentation/devicetree/bindings/interconnect/qcom,osm-l3.yaml
index cd4bb912e0dc..ab5a921c3495 100644
--- a/Documentation/devicetree/bindings/interconnect/qcom,osm-l3.yaml
+++ b/Documentation/devicetree/bindings/interconnect/qcom,osm-l3.yaml
@@ -36,6 +36,11 @@ properties:
               - qcom,sm8350-epss-l3
               - qcom,sm8650-epss-l3
           - const: qcom,epss-l3
+      - items:
+          - enum:
+              - qcom,qcs8300-epss-l3
+          - const: qcom,sa8775p-epss-l3
+          - const: qcom,epss-l3
 
   reg:
     maxItems: 1
-- 
2.43.0

[PATCH V2 2/3] arm64: dts: qcom: qcs8300: Add EPSS l3 interconnect provider node

[Raviteja Laggyshetty]

Add Epoch Subsystem (EPSS) L3 interconnect provider node for QCS8300 SoC.
As QCS8300 and SA8775P SoCs have same EPSS hardware, added SA8775P
compatible as fallback for QCS8300 EPSS device node.

Signed-off-by: Raviteja Laggyshetty <raviteja.laggyshetty@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/qcs8300.dtsi | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcs8300.dtsi b/arch/arm64/boot/dts/qcom/qcs8300.dtsi
index 7ada029c32c1..d6a58e228091 100644
--- a/arch/arm64/boot/dts/qcom/qcs8300.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcs8300.dtsi
@@ -12,6 +12,7 @@
 #include <dt-bindings/dma/qcom-gpi.h>
 #include <dt-bindings/firmware/qcom,scm.h>
 #include <dt-bindings/interconnect/qcom,icc.h>
+#include <dt-bindings/interconnect/qcom,osm-l3.h>
 #include <dt-bindings/interconnect/qcom,qcs8300-rpmh.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/mailbox/qcom-ipcc.h>
@@ -5433,6 +5434,15 @@ rpmhpd_opp_turbo_l1: opp-9 {
 			};
 		};
 
+		epss_l3_cl0: interconnect@18590000 {
+			compatible = "qcom,qcs8300-epss-l3", "qcom,sa8775p-epss-l3",
+				     "qcom,epss-l3";
+			reg = <0x0 0x18590000 0x0 0x1000>;
+			clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GCC_GPLL0>;
+			clock-names = "xo", "alternate";
+			#interconnect-cells = <1>;
+		};
+
 		cpufreq_hw: cpufreq@18591000 {
 			compatible = "qcom,qcs8300-cpufreq-epss", "qcom,cpufreq-epss";
 			reg = <0x0 0x18591000 0x0 0x1000>,
@@ -5455,6 +5465,15 @@ cpufreq_hw: cpufreq@18591000 {
 			#freq-domain-cells = <1>;
 		};
 
+		epss_l3_cl1: interconnect@18592000 {
+			compatible = "qcom,qcs8300-epss-l3", "qcom,sa8775p-epss-l3",
+				     "qcom,epss-l3";
+			reg = <0x0 0x18592000 0x0 0x1000>;
+			clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GCC_GPLL0>;
+			clock-names = "xo", "alternate";
+			#interconnect-cells = <1>;
+		};
+
 		remoteproc_gpdsp: remoteproc@20c00000 {
 			compatible = "qcom,qcs8300-gpdsp-pas", "qcom,sa8775p-gpdsp0-pas";
 			reg = <0x0 0x20c00000 0x0 0x10000>;
-- 
2.43.0

[PATCH V2 3/3] arm64: dts: qcom: qcs8300: Add CPU OPP tables to scale DDR/L3

[Raviteja Laggyshetty]

From: Imran Shaik <quic_imrashai@quicinc.com>

Add OPP tables required to scale DDR and L3 per freq-domain on QCS8300
platform.

Signed-off-by: Imran Shaik <quic_imrashai@quicinc.com>
Signed-off-by: Raviteja Laggyshetty <raviteja.laggyshetty@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/qcs8300.dtsi | 282 ++++++++++++++++++++++++++
 1 file changed, 282 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcs8300.dtsi b/arch/arm64/boot/dts/qcom/qcs8300.dtsi
index d6a58e228091..7d38ddd2cc9e 100644
--- a/arch/arm64/boot/dts/qcom/qcs8300.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcs8300.dtsi
@@ -54,6 +54,11 @@ cpu0: cpu@0 {
 			capacity-dmips-mhz = <1946>;
 			dynamic-power-coefficient = <472>;
 			qcom,freq-domain = <&cpufreq_hw 0>;
+			operating-points-v2 = <&cpu0_opp_table>;
+			interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+					<&epss_l3_cl0 MASTER_EPSS_L3_APPS
+					 &epss_l3_cl0 SLAVE_EPSS_L3_SHARED>;
 
 			l2_0: l2-cache {
 				compatible = "cache";
@@ -74,6 +79,11 @@ cpu1: cpu@100 {
 			capacity-dmips-mhz = <1946>;
 			dynamic-power-coefficient = <472>;
 			qcom,freq-domain = <&cpufreq_hw 0>;
+			operating-points-v2 = <&cpu0_opp_table>;
+			interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+					<&epss_l3_cl0 MASTER_EPSS_L3_APPS
+					 &epss_l3_cl0 SLAVE_EPSS_L3_SHARED>;
 
 			l2_1: l2-cache {
 				compatible = "cache";
@@ -94,6 +104,11 @@ cpu2: cpu@200 {
 			capacity-dmips-mhz = <1946>;
 			dynamic-power-coefficient = <507>;
 			qcom,freq-domain = <&cpufreq_hw 2>;
+			operating-points-v2 = <&cpu2_opp_table>;
+			interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+					<&epss_l3_cl0 MASTER_EPSS_L3_APPS
+					 &epss_l3_cl0 SLAVE_EPSS_L3_SHARED>;
 
 			l2_2: l2-cache {
 				compatible = "cache";
@@ -114,6 +129,11 @@ cpu3: cpu@300 {
 			capacity-dmips-mhz = <1946>;
 			dynamic-power-coefficient = <507>;
 			qcom,freq-domain = <&cpufreq_hw 2>;
+			operating-points-v2 = <&cpu2_opp_table>;
+			interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+					<&epss_l3_cl0 MASTER_EPSS_L3_APPS
+					 &epss_l3_cl0 SLAVE_EPSS_L3_SHARED>;
 
 			l2_3: l2-cache {
 				compatible = "cache";
@@ -134,6 +154,11 @@ cpu4: cpu@10000 {
 			capacity-dmips-mhz = <1024>;
 			dynamic-power-coefficient = <100>;
 			qcom,freq-domain = <&cpufreq_hw 1>;
+			operating-points-v2 = <&cpu4_opp_table>;
+			interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+					<&epss_l3_cl1 MASTER_EPSS_L3_APPS
+					 &epss_l3_cl1 SLAVE_EPSS_L3_SHARED>;
 
 			l2_4: l2-cache {
 				compatible = "cache";
@@ -154,6 +179,11 @@ cpu5: cpu@10100 {
 			capacity-dmips-mhz = <1024>;
 			dynamic-power-coefficient = <100>;
 			qcom,freq-domain = <&cpufreq_hw 1>;
+			operating-points-v2 = <&cpu4_opp_table>;
+			interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+					<&epss_l3_cl1 MASTER_EPSS_L3_APPS
+					 &epss_l3_cl1 SLAVE_EPSS_L3_SHARED>;
 
 			l2_5: l2-cache {
 				compatible = "cache";
@@ -174,6 +204,11 @@ cpu6: cpu@10200 {
 			capacity-dmips-mhz = <1024>;
 			dynamic-power-coefficient = <100>;
 			qcom,freq-domain = <&cpufreq_hw 1>;
+			operating-points-v2 = <&cpu4_opp_table>;
+			interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+					<&epss_l3_cl1 MASTER_EPSS_L3_APPS
+					 &epss_l3_cl1 SLAVE_EPSS_L3_SHARED>;
 
 			l2_6: l2-cache {
 				compatible = "cache";
@@ -194,6 +229,11 @@ cpu7: cpu@10300 {
 			capacity-dmips-mhz = <1024>;
 			dynamic-power-coefficient = <100>;
 			qcom,freq-domain = <&cpufreq_hw 1>;
+			operating-points-v2 = <&cpu4_opp_table>;
+			interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
+					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+					<&epss_l3_cl1 MASTER_EPSS_L3_APPS
+					 &epss_l3_cl1 SLAVE_EPSS_L3_SHARED>;
 
 			l2_7: l2-cache {
 				compatible = "cache";
@@ -324,6 +364,248 @@ system_sleep: domain-sleep {
 		};
 	};
 
+	cpu0_opp_table: opp-table-cpu0 {
+		compatible = "operating-points-v2";
+		opp-shared;
+
+		opp-902400000 {
+			opp-hz = /bits/ 64 <902400000>;
+			opp-peak-kBps = <(681600 * 4) (921600 * 32)>;
+		};
+
+		opp-1017600000 {
+			opp-hz = /bits/ 64 <1017600000>;
+			opp-peak-kBps = <(1017600 * 4) (921600 * 32)>;
+		};
+
+		opp-1190400000 {
+			opp-hz = /bits/ 64 <1190400000>;
+			opp-peak-kBps = <(1708800 * 4) (921600 * 32)>;
+		};
+
+		opp-1267200000 {
+			opp-hz = /bits/ 64 <1267200000>;
+			opp-peak-kBps = <(2092800 * 4) (998400 * 32)>;
+		};
+
+		opp-1344000000 {
+			opp-hz = /bits/ 64 <1344000000>;
+			opp-peak-kBps = <(2092800 * 4) (1075200 * 32)>;
+		};
+
+		opp-1420800000 {
+			opp-hz = /bits/ 64 <1420800000>;
+			opp-peak-kBps = <(2092800 * 4) (1152000 * 32)>;
+		};
+
+		opp-1497600000 {
+			opp-hz = /bits/ 64 <1497600000>;
+			opp-peak-kBps = <(2092800 * 4) (1228800 * 32)>;
+		};
+
+		opp-1574400000 {
+			opp-hz = /bits/ 64 <1574400000>;
+			opp-peak-kBps = <(2736000 * 4) (1324800 * 32)>;
+		};
+
+		opp-1670400000 {
+			opp-hz = /bits/ 64 <1670400000>;
+			opp-peak-kBps = <(2736000 * 4) (1401600 * 32)>;
+		};
+
+		opp-1747200000 {
+			opp-hz = /bits/ 64 <1747200000>;
+			opp-peak-kBps = <(2736000 * 4) (1401600 * 32)>;
+		};
+
+		opp-1824000000 {
+			opp-hz = /bits/ 64 <1824000000>;
+			opp-peak-kBps = <(2736000 * 4) (1478400 * 32)>;
+		};
+
+		opp-1900800000 {
+			opp-hz = /bits/ 64 <1900800000>;
+			opp-peak-kBps = <(2736000 * 4) (1478400 * 32)>;
+		};
+
+		opp-1977600000 {
+			opp-hz = /bits/ 64 <1977600000>;
+			opp-peak-kBps = <(3196800 * 4) (1555200 * 32)>;
+		};
+
+		opp-2054400000 {
+			opp-hz = /bits/ 64 <2054400000>;
+			opp-peak-kBps = <(3196800 * 4) (1555200 * 32)>;
+		};
+
+		opp-2112000000 {
+			opp-hz = /bits/ 64 <2112000000>;
+			opp-peak-kBps = <(3196800 * 4) (1612800 * 32)>;
+		};
+
+	};
+
+	cpu2_opp_table: opp-table-cpu2 {
+		compatible = "operating-points-v2";
+		opp-shared;
+
+		opp-940800000 {
+			opp-hz = /bits/ 64 <940800000>;
+			opp-peak-kBps = <(681600 * 4) (921600 * 32)>;
+		};
+
+		opp-1094400000 {
+			opp-hz = /bits/ 64 <1094400000>;
+			opp-peak-kBps = <(1017600 * 4) (921600 * 32)>;
+		};
+
+		opp-1267200000 {
+			opp-hz = /bits/ 64 <1267200000>;
+			opp-peak-kBps = <(1708800 * 4) (921600 * 32)>;
+		};
+
+		opp-1344000000 {
+			opp-hz = /bits/ 64 <1344000000>;
+			opp-peak-kBps = <(2092800 * 4) (998400 * 32)>;
+		};
+
+		opp-1420800000 {
+			opp-hz = /bits/ 64 <1420800000>;
+			opp-peak-kBps = <(2092800 * 4) (998400 * 32)>;
+		};
+
+		opp-1497600000 {
+			opp-hz = /bits/ 64 <1497600000>;
+			opp-peak-kBps = <(2092800 * 4) (1075200 * 32)>;
+		};
+
+		opp-1574400000 {
+			opp-hz = /bits/ 64 <1574400000>;
+			opp-peak-kBps = <(2092800 * 4) (1152000 * 32)>;
+		};
+
+		opp-1632000000 {
+			opp-hz = /bits/ 64 <1632000000>;
+			opp-peak-kBps = <(2092800 * 4) (1228800 * 32)>;
+		};
+
+		opp-1708800000 {
+			opp-hz = /bits/ 64 <1708800000>;
+			opp-peak-kBps = <(2736000 * 4) (1324800 * 32)>;
+		};
+
+		opp-1804800000 {
+			opp-hz = /bits/ 64 <1804800000>;
+			opp-peak-kBps = <(2736000 * 4) (1324800 * 32)>;
+		};
+
+		opp-1900800000 {
+			opp-hz = /bits/ 64 <1900800000>;
+			opp-peak-kBps = <(2736000 * 4) (1324800 * 32)>;
+		};
+
+		opp-1977600000 {
+			opp-hz = /bits/ 64 <1977600000>;
+			opp-peak-kBps = <(2736000 * 4) (1401600 * 32)>;
+		};
+
+		opp-2054400000 {
+			opp-hz = /bits/ 64 <2054400000>;
+			opp-peak-kBps = <(2736000 * 4) (1478400 * 32)>;
+		};
+
+		opp-2131200000 {
+			opp-hz = /bits/ 64 <2131200000>;
+			opp-peak-kBps = <(3196800 * 4) (1555200 * 32)>;
+		};
+
+		opp-2208000000 {
+			opp-hz = /bits/ 64 <2208000000>;
+			opp-peak-kBps = <(3196800 * 4) (1555200 * 32)>;
+		};
+
+		opp-2284800000 {
+			opp-hz = /bits/ 64 <2284800000>;
+			opp-peak-kBps = <(3196800 * 4) (1612800 * 32)>;
+		};
+
+		opp-2361600000 {
+			opp-hz = /bits/ 64 <2361600000>;
+			opp-peak-kBps = <(3196800 * 4) (1612800 * 32)>;
+		};
+
+	};
+
+	cpu4_opp_table: opp-table-cpu4 {
+		compatible = "operating-points-v2";
+		opp-shared;
+
+		opp-844800000 {
+			opp-hz = /bits/ 64 <844800000>;
+			opp-peak-kBps = <(681600 * 4) (921600 * 32)>;
+		};
+
+		opp-1113600000 {
+			opp-hz = /bits/ 64 <1113600000>;
+			opp-peak-kBps = <(1708800 * 4) (921600 * 32)>;
+		};
+
+		opp-1209600000 {
+			opp-hz = /bits/ 64 <1209600000>;
+			opp-peak-kBps = <(2092800 * 4) (998400 * 32)>;
+		};
+
+		opp-1305600000 {
+			opp-hz = /bits/ 64 <1305600000>;
+			opp-peak-kBps = <(2092800 * 4) (1075200 * 32)>;
+		};
+
+		opp-1382400000 {
+			opp-hz = /bits/ 64 <1382400000>;
+			opp-peak-kBps = <(2092800 * 4) (1152000 * 32)>;
+		};
+
+		opp-1459200000 {
+			opp-hz = /bits/ 64 <1459200000>;
+			opp-peak-kBps = <(2092800 * 4) (1228800 * 32)>;
+		};
+
+		opp-1497600000 {
+			opp-hz = /bits/ 64 <1497600000>;
+			opp-peak-kBps = <(2736000 * 4) (1324800 * 32)>;
+		};
+
+		opp-1574400000 {
+			opp-hz = /bits/ 64 <1574400000>;
+			opp-peak-kBps = <(2736000 * 4) (1324800 * 32)>;
+		};
+
+		opp-1651200000 {
+			opp-hz = /bits/ 64 <1651200000>;
+			opp-peak-kBps = <(2736000 * 4) (1324800 * 32)>;
+		};
+
+		opp-1728000000 {
+			opp-hz = /bits/ 64 <1728000000>;
+			opp-peak-kBps = <(2736000 * 4) (1401600 * 32)>;
+		};
+
+		opp-1804800000 {
+			opp-hz = /bits/ 64 <1804800000>;
+			opp-peak-kBps = <(2736000 * 4) (1478400 * 32)>;
+		};
+
+		opp-1881600000 {
+			opp-hz = /bits/ 64 <1881600000>;
+			opp-peak-kBps = <(3196800 * 4) (1555200 * 32)>;
+		};
+
+		opp-1958400000 {
+			opp-hz = /bits/ 64 <1958400000>;
+			opp-peak-kBps = <(3196800 * 4) (1612800 * 32)>;
+		};
+	};
+
 	dummy_eud: dummy-sink {
 		compatible = "arm,coresight-dummy-sink";
 
-- 
2.43.0

Re: [PATCH V2 1/3] dt-bindings: interconnect: Add EPSS L3 compatible for QCS8300 SoC

[Krzysztof Kozlowski]

On 11/07/2025 12:25, Raviteja Laggyshetty wrote:
> Add Epoch Subsystem (EPSS) L3 interconnect provider binding for
> QCS8300 SoC. As the EPSS hardware in QCS8300 and SA8775P are same,
> added a family-level compatible for SA877P SoC. This shared fallback
> compatible allows grouping of SoCs with similar hardware, reducing
> the need to explicitly list each variant in the driver match table.
> 
> Signed-off-by: Raviteja Laggyshetty <raviteja.laggyshetty@oss.qualcomm.com>
> ---

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof

Re: [PATCH V2 2/3] arm64: dts: qcom: qcs8300: Add EPSS l3 interconnect provider node

[Konrad Dybcio]

On 7/11/25 12:25 PM, Raviteja Laggyshetty wrote:
> Add Epoch Subsystem (EPSS) L3 interconnect provider node for QCS8300 SoC.
> As QCS8300 and SA8775P SoCs have same EPSS hardware, added SA8775P
> compatible as fallback for QCS8300 EPSS device node.
> 
> Signed-off-by: Raviteja Laggyshetty <raviteja.laggyshetty@oss.qualcomm.com>
> ---

Squash patches 2 & 3 together (because otherwise you'll still be hitting
the issue I described the last time)

With that (modulo me trusting the numbers you put into the OPP table):

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

Re: [PATCH V2 2/3] arm64: dts: qcom: qcs8300: Add EPSS l3 interconnect provider node

[Raviteja Laggyshetty]

On 7/18/2025 2:36 AM, Konrad Dybcio wrote:
> On 7/11/25 12:25 PM, Raviteja Laggyshetty wrote:
>> Add Epoch Subsystem (EPSS) L3 interconnect provider node for QCS8300 SoC.
>> As QCS8300 and SA8775P SoCs have same EPSS hardware, added SA8775P
>> compatible as fallback for QCS8300 EPSS device node.
>>
>> Signed-off-by: Raviteja Laggyshetty <raviteja.laggyshetty@oss.qualcomm.com>
>> ---
> Squash patches 2 & 3 together (because otherwise you'll still be hitting
> the issue I described the last time)
> With that (modulo me trusting the numbers you put into the OPP table):
>
> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
>
> Konrad
Sure, will merge them as single patch. Thanks!