linux-kernel - [PATCH v2] arm64: dts: qcom: ipq6018: use CPUFreq NVMEM

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Message-ID: <20231021120048.231239-1-robimarko@gmail.com>
Date:   Sat, 21 Oct 2023 14:00:07 +0200
From:   Robert Marko <robimarko@...il.com>
To:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Robert Marko <robimarko@...il.com>
Subject: [PATCH v2] arm64: dts: qcom: ipq6018: use CPUFreq NVMEM

IPQ6018 comes in multiple SKU-s and some of them dont support all of the
OPP-s that are current set, so lets utilize CPUFreq NVMEM to allow only
supported OPP-s based on the SoC dynamically.

As an example, IPQ6018 is generaly rated at 1.8GHz but some silicon only
goes up to 1.5GHz and is marked as such via an eFuse.

Signed-off-by: Robert Marko <robimarko@...il.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
Changes in v2:
* Use minus instead of underscore for fuse node name
* Drop driver code as it was merged

 arch/arm64/boot/dts/qcom/ipq6018.dtsi | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/ipq6018.dtsi b/arch/arm64/boot/dts/qcom/ipq6018.dtsi
index 9aec89d5e095b..eebd8afe0efce 100644
--- a/arch/arm64/boot/dts/qcom/ipq6018.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq6018.dtsi
@@ -96,42 +96,49 @@ scm {
 	};
 
 	cpu_opp_table: opp-table-cpu {
-		compatible = "operating-points-v2";
+		compatible = "operating-points-v2-kryo-cpu";
+		nvmem-cells = <&cpu_speed_bin>;
 		opp-shared;
 
 		opp-864000000 {
 			opp-hz = /bits/ 64 <864000000>;
 			opp-microvolt = <725000>;
+			opp-supported-hw = <0xf>;
 			clock-latency-ns = <200000>;
 		};
 
 		opp-1056000000 {
 			opp-hz = /bits/ 64 <1056000000>;
 			opp-microvolt = <787500>;
+			opp-supported-hw = <0xf>;
 			clock-latency-ns = <200000>;
 		};
 
 		opp-1320000000 {
 			opp-hz = /bits/ 64 <1320000000>;
 			opp-microvolt = <862500>;
+			opp-supported-hw = <0x3>;
 			clock-latency-ns = <200000>;
 		};
 
 		opp-1440000000 {
 			opp-hz = /bits/ 64 <1440000000>;
 			opp-microvolt = <925000>;
+			opp-supported-hw = <0x3>;
 			clock-latency-ns = <200000>;
 		};
 
 		opp-1608000000 {
 			opp-hz = /bits/ 64 <1608000000>;
 			opp-microvolt = <987500>;
+			opp-supported-hw = <0x1>;
 			clock-latency-ns = <200000>;
 		};
 
 		opp-1800000000 {
 			opp-hz = /bits/ 64 <1800000000>;
 			opp-microvolt = <1062500>;
+			opp-supported-hw = <0x1>;
 			clock-latency-ns = <200000>;
 		};
 	};
@@ -314,6 +321,11 @@ qfprom: efuse@...00 {
 			reg = <0x0 0x000a4000 0x0 0x2000>;
 			#address-cells = <1>;
 			#size-cells = <1>;
+
+			cpu_speed_bin: cpu-speed-bin@135 {
+				reg = <0x135 0x1>;
+				bits = <7 1>;
+			};
 		};
 
 		prng: qrng@...00 {
-- 
2.41.0