linux-kernel - [PATCH 10/10] arm64: dts: qcom: sdm845: add LLCC BWMON

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Message-Id: <20220720192807.130098-11-krzysztof.kozlowski@linaro.org>
Date:   Wed, 20 Jul 2022 21:28:07 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Georgi Djakov <djakov@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Rajendra Nayak <quic_rjendra@...cinc.com>
Subject: [PATCH 10/10] arm64: dts: qcom: sdm845: add LLCC BWMON

The SDM845 comes with few instances of Bandwidth Monitor.  The already
supported one monitors traffic between CPU and Last Level Cache
Controller (LLCC) and in downstream sources is called BWMON v4 (or v4 of
register layout).

SDM845 also has also BWMON instance measuring traffic between LLCC and
memory with different register layout: called v5.

Cc: Rajendra Nayak <quic_rjendra@...cinc.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 arch/arm64/boot/dts/qcom/sdm845.dtsi | 37 ++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index fe14f7e7523b..4aab464e2bd6 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -2053,6 +2053,43 @@ llcc: system-cache-controller@...0000 {
 			interrupts = <GIC_SPI 582 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
+		pmu@...a000 {
+			compatible = "qcom,sdm845-llcc-bwmon";
+			reg = <0 0x0114a000 0 0x1000>;
+			interrupts = <GIC_SPI 580 IRQ_TYPE_LEVEL_HIGH>;
+			interconnects = <&mem_noc MASTER_LLCC 3 &mem_noc SLAVE_EBI1 3>;
+
+			operating-points-v2 = <&llcc_bwmon_opp_table>;
+
+			llcc_bwmon_opp_table: opp-table {
+				compatible = "operating-points-v2";
+
+				/*
+				 * The interconnect path bandwidth taken from
+				 * cpu4_opp_table bandwidth for gladiator_noc-mem_noc
+				 * interconnect.  This also matches the
+				 * bandwidth table of qcom,llccbw (qcom,bw-tbl,
+				 * bus width: 4 bytes) from msm-4.9 downstream
+				 * kernel.
+				 */
+				opp-0 {
+					opp-peak-kBps = <800000>;
+				};
+				opp-1 {
+					opp-peak-kBps = <1804000>;
+				};
+				opp-2 {
+					opp-peak-kBps = <3072000>;
+				};
+				opp-3 {
+					opp-peak-kBps = <5412000>;
+				};
+				opp-4 {
+					opp-peak-kBps = <7216000>;
+				};
+			};
+		};
+
 		pmu@...6400 {
 			compatible = "qcom,sdm845-bwmon", "qcom,msm8998-bwmon";
 			reg = <0 0x01436400 0 0x600>;
-- 
2.34.1