Evolution-x-devices/kernel_oneplus_sm8550-devicetrees
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ARM: dts: msm: Add flag to know if APSS based l1ss-sleep is supported or not

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Some endpoints like NVMe D3cold transition is prohibited as it
decreases the life time of the device (D3 cold is treated as power
cycle). So turning off the link during S3 can reduce life span of the NVMe.

For those endpoints adding a flag to inform the driver that APSS based
l1ss-sleep is supported. The PCIe driver will keep the link in L1ss and
turn off PCIe resources if this flag is set.

Change-Id: I3682bda297181eb9f5b63cf817b05e37b160b3ce
This commit is contained in:
Krishna Chaitanya Chundru
2022-10-07 14:56:02 +05:30
committed by Gerrit - the friendly Code Review server
parent bfa0627c44
commit dc2e5b85a1
3 changed files with 7 additions and 0 deletions
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5
bindings/pci/pci-msm.txt
View File

@@ -265,6 +265,11 @@ interconnects:
Value type: <bool>
Definition: L1 sub-state (L1ss) is not supported
- qcom,apss-based-l1ss-sleep:
Usage: optional
Value type: <bool>
Definition: Apss based L1ss sleep is supported
- qcom,no-aux-clk-sync:
Usage: optional
Value type: <bool>

1
qcom/kalamap-hdk.dtsi
View File

@@ -35,4 +35,5 @@
&pcie1 {
qcom,boot-option = <0x2>;
qcom,apss-based-l1ss-sleep;
};

1
qcom/kalamap-sg-hhg.dtsi
View File

@@ -14,6 +14,7 @@
&pcie1 {
vreg-3p3-supply = <&nvme_vreg>;
qcom,boot-option = <0x2>;
qcom,apss-based-l1ss-sleep;
};
&regulator_ocp_notifier {