From: Nadeem Athani <nadeem@cadence.com>
To: <tjoseph@cadence.com>, <bhelgaas@google.com>,
<robh+dt@kernel.org>, <linux-pci@vger.kernel.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<lorenzo.pieralisi@arm.com>, <robh@kernel.org>, <kishon@ti.com>
Cc: <mparab@cadence.com>, <sjakhade@cadence.com>,
<nadeem@cadence.com>, <pthombar@cadence.com>
Subject: [PATCH 1/2] dt-bindings:pci: Set LTSSM Detect.Quiet state delay.
Date: Tue, 9 Mar 2021 08:31:41 +0100 [thread overview]
Message-ID: <20210309073142.13219-2-nadeem@cadence.com> (raw)
In-Reply-To: <20210309073142.13219-1-nadeem@cadence.com>
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@cadence.com>
---
.../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
next prev parent reply other threads:[~2021-03-09 7:32 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-09 7:31 [PATCH 0/2] PCI: cadence: " Nadeem Athani
2021-03-09 7:31 ` Nadeem Athani [this message]
2021-03-09 16:46 ` [PATCH 1/2] dt-bindings:pci: " Rob Herring
2021-03-14 18:56 ` Athani Nadeem Ladkhan
2021-03-09 17:19 ` Rob Herring
2021-03-09 7:31 ` [PATCH 2/2] PCI: cadence: " Nadeem Athani
2021-03-15 13:11 ` Kishon Vijay Abraham I
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