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[v3,08/11] devicetree: bindings: pci: document PARF params bindings

Message ID 20200430220619.3169-9-ansuelsmth@gmail.com
State New
Headers show
Series Multiple fixes in PCIe qcom driver | expand

Commit Message

Christian Marangi April 30, 2020, 10:06 p.m. UTC 
It is now supported the editing of Tx De-Emphasis, Tx Swing and
Rx equalization params on ipq8064. Document this new optional params.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
 .../devicetree/bindings/pci/qcom,pcie.txt     | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)
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Patch

diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.txt b/Documentation/devicetree/bindings/pci/qcom,pcie.txt
index 6efcef040741..8cc5aea8a1da 100644
--- a/Documentation/devicetree/bindings/pci/qcom,pcie.txt
+++ b/Documentation/devicetree/bindings/pci/qcom,pcie.txt
@@ -254,6 +254,42 @@ 
 			- "perst-gpios"	PCIe endpoint reset signal line
 			- "wake-gpios"	PCIe endpoint wake signal line
 
+- qcom,tx-deemph-gen1:
+	Usage: optional (available for ipq/apq8064)
+	Value type: <u32>
+	Definition: Gen1 De-emphasis value.
+		    For ipq806x should be set to 24.
+
+- qcom,tx-deemph-gen2-3p5db:
+	Usage: optional (available for ipq/apq8064)
+	Value type: <u32>
+	Definition: Gen2 (3.5db) De-emphasis value.
+		    For ipq806x should be set to 24.
+
+- qcom,tx-deemph-gen2-6db:
+	Usage: optional (available for ipq/apq8064)
+	Value type: <u32>
+	Definition: Gen2 (6db) De-emphasis value.
+		    For ipq806x should be set to 34.
+
+- qcom,tx-swing-full:
+	Usage: optional (available for ipq/apq8064)
+	Value type: <u32>
+	Definition: TX launch amplitude swing_full value.
+		    For ipq806x should be set to 120.
+
+- qcom,tx-swing-low:
+	Usage: optional (available for ipq/apq8064)
+	Value type: <u32>
+	Definition: TX launch amplitude swing_low value.
+		    For ipq806x should be set to 120.
+
+- qcom,rx0-eq:
+	Usage: optional (available for ipq/apq8064)
+	Value type: <u32>
+	Definition: RX0 equalization value.
+		    For ipq806x should be set to 4.
+
 * Example for ipq/apq8064
 	pcie@1b500000 {
 		compatible = "qcom,pcie-apq8064", "qcom,pcie-ipq8064", "snps,dw-pcie";