Add bindings support for the SCMI QTI memlat (memory latency) vendor
protocol. The memlat vendor protocol enables the frequency scaling of
various buses (L3/LLCC/DDR) based on the memory latency governor
running on the CPUSS Control Processor.
Signed-off-by: Sibi Sankar <quic_sibis@xxxxxxxxxxx>
---
.../devicetree/bindings/firmware/arm,scmi.yaml | 164 +++++++++++++++++++++
1 file changed, 164 insertions(+)
diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
index 1c0388da6721..efc8a5a8bffe 100644
--- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
+++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
@@ -189,6 +189,47 @@ properties:
reg:
const: 0x18
+ protocol@80:
+ type: object
+ properties:
+ reg:
+ const: 0x80
+
+ qcom,bus-type:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ items:
+ minItems: 1
+ description:
+ Identifier of the bus type to be scaled by the memlat protocol.
+
+ cpu-map:
+ type: object
+ description:
+ The list of all cpu cluster configurations to be tracked by the memlat protocol
+
+ patternProperties:
+ '^cluster[0-9]':
+ type: object
+ description:
+ Each cluster node describes the frequency domain associated with the
+ CPUFREQ HW engine and bandwidth requirements of the buses to be scaled.
+
+ properties:
+ operating-points-v2: true
+
+ qcom,freq-domain:
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+ description:
+ Reference to the frequency domain of the CPUFREQ HW engine
+ items:
+ - items:
+ - description: phandle to CPUFREQ HW engine
+ - description: frequency domain associated with the cluster
+
+ required:
+ - qcom,freq-domain
+ - operating-points-v2
+
additionalProperties: false
patternProperties:
@@ -429,4 +470,127 @@ examples:
};
};
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ firmware {
+ scmi {
+ compatible = "arm,scmi";
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ mboxes = <&cpucp_mbox>;
+ mbox-names = "tx";
+ shmem = <&cpu_scp_lpri>;
+
+ scmi_memlat: protocol@80 {
+ reg = <0x80>;
+ qcom,bus-type = <0x2>;
+
+ cpu-map {
+ cluster0 {
+ qcom,freq-domain = <&cpufreq_hw 0>;
+ operating-points-v2 = <&cpu0_opp_table>;
+ };
+
+ cluster1 {
+ qcom,freq-domain = <&cpufreq_hw 1>;
+ operating-points-v2 = <&cpu4_opp_table>;
+ };
+
+ cluster2 {
+ qcom,freq-domain = <&cpufreq_hw 2>;
+ operating-points-v2 = <&cpu7_opp_table>;
+ };
+ };
+ };
+ };
+
+ cpu0_opp_table: opp-table-cpu0 {
+ compatible = "operating-points-v2";
+
+ cpu0_opp_300mhz: opp-300000000 {
+ opp-hz = /bits/ 64 <300000000>;
+ opp-peak-kBps = <9600000>;
+ };
+
+ cpu0_opp_1325mhz: opp-1324800000 {
+ opp-hz = /bits/ 64 <1324800000>;
+ opp-peak-kBps = <33792000>;
+ };
+
+ cpu0_opp_2016mhz: opp-2016000000 {
+ opp-hz = /bits/ 64 <2016000000>;
+ opp-peak-kBps = <48537600>;
+ };
+ };
+
+ cpu4_opp_table: opp-table-cpu4 {
+ compatible = "operating-points-v2";
+
+ cpu4_opp_691mhz: opp-691200000 {
+ opp-hz = /bits/ 64 <691200000>;
+ opp-peak-kBps = <9600000>;
+ };
+
+ cpu4_opp_941mhz: opp-940800000 {
+ opp-hz = /bits/ 64 <940800000>;
+ opp-peak-kBps = <17817600>;
+ };
+
+ cpu4_opp_2611mhz: opp-2611200000 {
+ opp-hz = /bits/ 64 <2611200000>;
+ opp-peak-kBps = <48537600>;
+ };
+ };
+
+ cpu7_opp_table: opp-table-cpu7 {
+ compatible = "operating-points-v2";
+
+ cpu7_opp_806mhz: opp-806400000 {
+ opp-hz = /bits/ 64 <806400000>;
+ opp-peak-kBps = <9600000>;
+ };
+
+ cpu7_opp_2381mhz: opp-2380800000 {
+ opp-hz = /bits/ 64 <2380800000>;
+ opp-peak-kBps = <44851200>;
+ };
+
+ cpu7_opp_2515mhz: opp-2515200000 {
+ opp-hz = /bits/ 64 <2515200000>;
+ opp-peak-kBps = <48537600>;
+ };
+ };
+ };
+
+
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ cpucp_mbox: mailbox@17400000 {
+ compatible = "qcom,cpucp-mbox";
+ reg = <0x0 0x17c00000 0x0 0x10>, <0x0 0x18590300 0x0 0x700>;
+ interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
+ #mbox-cells = <0>;
+ };
+
+ sram@18509400 {
+ compatible = "mmio-sram";
+ reg = <0x0 0x18509400 0x0 0x400>;
+ no-memory-wc;
+
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0x0 0x0 0x18509400 0x400>;
+
+ cpu_scp_lpri: scp-sram-section@0 {
+ compatible = "arm,scmi-shmem";
+ reg = <0x0 0x80>;
+ };
+ };
+ };
+
...
--
2.7.4
