The parameter detect-quiet-min-delay can be used to program the minimum
time that LTSSM waits on entering Detect.Quiet state.
00 : 0us minimum wait time in Detect.Quiet state.
01 : 100us minimum wait time in Detect.Quiet state.
10 : 1000us minimum wait time in Detect.Quiet state.
11 : 2000us minimum wait time in Detect.Quiet state.
Signed-off-by: Nadeem Athani <nadeem@xxxxxxxxxxx>
---
.../devicetree/bindings/pci/cdns,cdns-pcie-host.yaml | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.yaml b/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.yaml
index 293b8ec318bc..a1d56e0be419 100644
--- a/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.yaml
+++ b/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.yaml
@@ -27,6 +27,18 @@ properties:
msi-parent: true
+ detect-quiet-min-delay:
+ description:
+ LTSSM Detect.Quiet state minimum delay.
+ 00 : 0us minimum wait time
+ 01 : 100us minimum wait time
+ 10 : 1000us minimum wait time
+ 11 : 2000us minimum wait time
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 0
+ maximum: 3
+ default: 0
+
required:
- reg
- reg-names
@@ -48,6 +60,7 @@ examples:
linux,pci-domain = <0>;
vendor-id = <0x17cd>;
device-id = <0x0200>;
+ detect-quiet-min-delay = <0>;
reg = <0x0 0xfb000000 0x0 0x01000000>,
<0x0 0x41000000 0x0 0x00001000>;
--
2.15.0
