linux-kernel - [PATCH 3/4] arm64: dts: qcom: sm8250: Add BWMONs

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Message-Id: <20230711-topic-sm638250_bwmon-v1-3-bd4bb96b0673@linaro.org>
Date:   Tue, 11 Jul 2023 16:35:15 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Georgi Djakov <djakov@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: [PATCH 3/4] arm64: dts: qcom: sm8250: Add BWMONs

Add the CPU and LLC BWMONs (skip the NPU ones for now) on sm8250.

LPDDR4X levels are skipped, as LPDDR5 seems more popular with SM8250 and
voting for inexistent levels doesn't uptick the bus frequency, which
results in no increased bandwidth, which results in bwmon deciding we
shouldn't go higher.. you see the point!

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 arch/arm64/boot/dts/qcom/sm8250.dtsi | 122 +++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8250.dtsi b/arch/arm64/boot/dts/qcom/sm8250.dtsi
index e03007e23e91..80abd0bdc526 100644
--- a/arch/arm64/boot/dts/qcom/sm8250.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8250.dtsi
@@ -3694,6 +3694,128 @@ opp-202000000 {
 			};
 		};
 
+		pmu@...1000 {
+			compatible = "qcom,sm8250-llcc-bwmon", "qcom,sc7280-llcc-bwmon";
+			reg = <0 0x09091000 0 0x1000>;
+
+			interrupts = <GIC_SPI 81 IRQ_TYPE_LEVEL_HIGH>;
+
+			interconnects = <&mc_virt MASTER_LLCC 3 &mc_virt SLAVE_EBI_CH0 3>;
+
+			operating-points-v2 = <&llcc_bwmon_opp_table>;
+
+			llcc_bwmon_opp_table: opp-table {
+				compatible = "operating-points-v2";
+
+				opp-800000 {
+					opp-peak-kBps = <(200 * 4 * 1000)>;
+				};
+
+				opp-1200000 {
+					opp-peak-kBps = <(300 * 4 * 1000)>;
+				};
+
+				opp-1804000 {
+					opp-peak-kBps = <(451 * 4 * 1000)>;
+				};
+
+				opp-2188000 {
+					opp-peak-kBps = <(547 * 4 * 1000)>;
+				};
+
+				opp-2724000 {
+					opp-peak-kBps = <(681 * 4 * 1000)>;
+				};
+
+				opp-3072000 {
+					opp-peak-kBps = <(768 * 4 * 1000)>;
+				};
+
+				opp-4068000 {
+					opp-peak-kBps = <(1017 * 4 * 1000)>;
+				};
+
+				/* 1353 MHz, LPDDR4X */
+
+				opp-6220000 {
+					opp-peak-kBps = <(1555 * 4 * 1000)>;
+				};
+
+				opp-7216000 {
+					opp-peak-kBps = <(1804 * 4 * 1000)>;
+				};
+
+				opp-8368000 {
+					opp-peak-kBps = <(2092 * 4 * 1000)>;
+				};
+
+				/* LPDDR5 */
+				opp-10944000 {
+					opp-peak-kBps = <(2736 * 4 * 1000)>;
+				};
+			};
+		};
+
+		pmu@...6400 {
+			compatible = "qcom,sm8250-cpu-bwmon", "qcom,sdm845-bwmon";
+			reg = <0 0x090b6400 0 0x600>;
+
+			interrupts = <GIC_SPI 581 IRQ_TYPE_LEVEL_HIGH>;
+
+			interconnects = <&gem_noc MASTER_AMPSS_M0 3 &gem_noc SLAVE_LLCC 3>;
+			operating-points-v2 = <&cpu_bwmon_opp_table>;
+
+			cpu_bwmon_opp_table: opp-table {
+				compatible = "operating-points-v2";
+
+				opp-800000 {
+					opp-peak-kBps = <(200 * 4 * 1000)>;
+				};
+
+				opp-1804000 {
+					opp-peak-kBps = <(451 * 4 * 1000)>;
+				};
+
+				opp-2188000 {
+					opp-peak-kBps = <(547 * 4 * 1000)>;
+				};
+
+				opp-2724000 {
+					opp-peak-kBps = <(681 * 4 * 1000)>;
+				};
+
+				opp-3072000 {
+					opp-peak-kBps = <(768 * 4 * 1000)>;
+				};
+
+				/* 1017MHz, 1353 MHz, LPDDR4X */
+
+				opp-6220000 {
+					opp-peak-kBps = <(1555 * 4 * 1000)>;
+				};
+
+				opp-6832000 {
+					opp-peak-kBps = <(1708 * 4 * 1000)>;
+				};
+
+				opp-8368000 {
+					opp-peak-kBps = <(2092 * 4 * 1000)>;
+				};
+
+				/* 2133MHz, LPDDR4X */
+
+				/* LPDDR5 */
+				opp-10944000 {
+					opp-peak-kBps = <(2736 * 4 * 1000)>;
+				};
+
+				/* LPDDR5 */
+				opp-12784000 {
+					opp-peak-kBps = <(3196 * 4 * 1000)>;
+				};
+			};
+		};
+
 		dc_noc: interconnect@...0000 {
 			compatible = "qcom,sm8250-dc-noc";
 			reg = <0 0x090c0000 0 0x4200>;

-- 
2.41.0