[PATCH v2 8/8] arm64: dts: qcom: ipq9574: populate the opp table based on the eFuse

Varadarajan Narayanan
2023-10-12T09:28:12Z

IPQ95xx SoCs have different OPPs available for the CPU based on
SoC variant. This can be determined from an eFuse register
present in the silicon.

Add support to read the eFuse and populate the OPPs based on it.

Frequency 1.2GHz 1.8GHz 1.5GHz No opp-supported-hw
Limit
------------------------------------------------------------
936000000 1 1 1 1 0xf
1104000000 1 1 1 1 0xf
1200000000 1 1 1 1 0xf
1416000000 0 1 1 1 0x7
1488000000 0 1 1 1 0x7
1800000000 0 1 0 1 0x5
2208000000 0 0 0 1 0x1
-----------------------------------------------------------

Signed-off-by: Kathiravan T <quic_kathirav@quicinc.com>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
---
v2: cpu_speed_bin -> cpu-speed-bin in node name
Move comment to commit log
---
arch/arm64/boot/dts/qcom/ipq9574.dtsi | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
index cc84f25..5f83ee4 100644
--- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
@@ -106,42 +106,56 @@
};

cpu_opp_table: opp-table-cpu {
- compatible = "operating-points-v2";
+ compatible = "operating-points-v2-kryo-cpu";
opp-shared;
+ nvmem-cells = <&cpu_speed_bin>;

opp-936000000 {
opp-hz = /bits/ 64 <936000000>;
opp-microvolt = <725000>;
+ opp-supported-hw = <0xf>;
clock-latency-ns = <200000>;
};

opp-1104000000 {
opp-hz = /bits/ 64 <1104000000>;
opp-microvolt = <787500>;
+ opp-supported-hw = <0xf>;
+ clock-latency-ns = <200000>;
+ };
+
+ opp-1200000000 {
+ opp-hz = /bits/ 64 <1200000000>;
+ opp-microvolt = <862500>;
+ opp-supported-hw = <0xf>;
clock-latency-ns = <200000>;
};

opp-1416000000 {
opp-hz = /bits/ 64 <1416000000>;
opp-microvolt = <862500>;
+ opp-supported-hw = <0x7>;
clock-latency-ns = <200000>;
};

opp-1488000000 {
opp-hz = /bits/ 64 <1488000000>;
opp-microvolt = <925000>;
+ opp-supported-hw = <0x7>;
clock-latency-ns = <200000>;
};

opp-1800000000 {
opp-hz = /bits/ 64 <1800000000>;
opp-microvolt = <987500>;
+ opp-supported-hw = <0x5>;
clock-latency-ns = <200000>;
};

opp-2208000000 {
opp-hz = /bits/ 64 <2208000000>;
opp-microvolt = <1062500>;
+ opp-supported-hw = <0x1>;
clock-latency-ns = <200000>;
};
};
@@ -223,6 +237,11 @@
reg = <0x000a4000 0x5a1>;
#address-cells = <1>;
#size-cells = <1>;
+
+ cpu_speed_bin: cpu-speed-bin@15 {
+ reg = <0x15 0x2>;
+ bits = <7 2>;
+ };
};

cryptobam: dma-controller@704000 {
--
2.7.4