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.
Signed-off-by: Kathiravan T <quic_kathirav@xxxxxxxxxxx>
Signed-off-by: Varadarajan Narayanan <quic_varada@xxxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/ipq9574.dtsi | 38 ++++++++++++++++++++++++++++++++++-
1 file changed, 37 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
index 89edb4b..ad6f1c6 100644
--- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
@@ -106,42 +106,73 @@
};
cpu_opp_table: opp-table-cpu {
- compatible = "operating-points-v2";
+ compatible = "operating-points-v2-kryo-cpu";
opp-shared;
+ nvmem-cells = <&cpu_speed_bin>;
+ nvmem-cell-names = "speed_bin";
+
+ /* Listed all supported CPU frequencies and opp-supported-hw
+ * values to select CPU frequencies based on the limits fused.
+ * ------------------------------------------------------------
+ * Frequency BIT3 BIT2 BIT1 BIT0 opp-supported-hw
+ * 1.2GHz 1.5GHz 1.8GHz No Limit
+ * ------------------------------------------------------------
+ * 936000000 1 1 1 1 0xF
+ * 1104000000 1 1 1 1 0xF
+ * 1200000000 1 0 0 0 0x8
+ * 1416000000 0 1 1 1 0x7
+ * 1488000000 0 1 0 0 0x4
+ * 1800000000 0 0 1 1 0x3
+ * 2208000000 0 0 0 1 0x1
+ * -----------------------------------------------------------
+ */
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 = <0x8>;
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 = <0x3>;
clock-latency-ns = <200000>;
};
opp-2208000000 {
opp-hz = /bits/ 64 <2208000000>;
opp-microvolt = <1062500>;
+ opp-supported-hw = <0x1>;
clock-latency-ns = <200000>;
};
};
@@ -223,6 +254,11 @@
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
