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authorJustin Waters <justin.waters@timesys.com>2016-01-15 10:24:35 -0500
committerBjorn Helgaas <bhelgaas@google.com>2016-02-29 17:31:58 -0600
commit28e3abe591e22717f7fabb9ffa839571b85df323 (patch)
treecb2576b73c0cad16881e7d1b3e17f96bfc3265cf /Documentation/devicetree/bindings/pci
parent4d107d3b5a686b5834e533a00b73bf7b1cf59df7 (diff)
PCI: imx6: Add DT bindings to configure PHY Tx driver settings
The settings in GPR8 are dependent upon the particular layout of the hardware platform. As such, they should be configurable via the device tree. Look up PHY Tx driver settings from the device tree. Fall back to the original hard-coded values if they are not specified in the device tree. Signed-off-by: Justin Waters <justin.waters@timesys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Lucas Stach <l.stach@pengutronix.de>
Diffstat (limited to 'Documentation/devicetree/bindings/pci')
-rw-r--r--Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt
index 6fbba53a309b..3be80c68941a 100644
--- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt
@@ -13,6 +13,13 @@ Required properties:
- clock-names: Must include the following additional entries:
- "pcie_phy"
+Optional properties:
+- fsl,tx-deemph-gen1: Gen1 De-emphasis value. Default: 0
+- fsl,tx-deemph-gen2-3p5db: Gen2 (3.5db) De-emphasis value. Default: 0
+- fsl,tx-deemph-gen2-6db: Gen2 (6db) De-emphasis value. Default: 20
+- fsl,tx-swing-full: Gen2 TX SWING FULL value. Default: 127
+- fsl,tx-swing-low: TX launch amplitude swing_low value. Default: 127
+
Example:
pcie@0x01000000 {