diff options
| author | Justin Waters <justin.waters@timesys.com> | 2016-01-15 10:24:35 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-02-29 17:31:58 -0600 |
| commit | 28e3abe591e22717f7fabb9ffa839571b85df323 (patch) | |
| tree | cb2576b73c0cad16881e7d1b3e17f96bfc3265cf /Documentation/devicetree/bindings/pci | |
| parent | 4d107d3b5a686b5834e533a00b73bf7b1cf59df7 (diff) | |
| download | blackbird-obmc-linux-28e3abe591e22717f7fabb9ffa839571b85df323.tar.gz blackbird-obmc-linux-28e3abe591e22717f7fabb9ffa839571b85df323.zip | |
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.txt | 7 |
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 { |
