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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/phy/apm-xgene-phy.txt | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | Documentation/devicetree/bindings/phy/apm-xgene-phy.txt | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/phy/apm-xgene-phy.txt b/Documentation/devicetree/bindings/phy/apm-xgene-phy.txt new file mode 100644 index 000000000..e1bb12711 --- /dev/null +++ b/Documentation/devicetree/bindings/phy/apm-xgene-phy.txt @@ -0,0 +1,76 @@ +* APM X-Gene 15Gbps Multi-purpose PHY nodes + +PHY nodes are defined to describe on-chip 15Gbps Multi-purpose PHY. Each +PHY (pair of lanes) has its own node. + +Required properties: +- compatible : Shall be "apm,xgene-phy". +- reg : PHY memory resource is the SDS PHY access resource. +- #phy-cells : Shall be 1 as it expects one argument for setting + the mode of the PHY. Possible values are 0 (SATA), + 1 (SGMII), 2 (PCIe), 3 (USB), and 4 (XFI). + +Optional properties: +- status : Shall be "ok" if enabled or "disabled" if disabled. + Default is "ok". +- clocks : Reference to the clock entry. +- apm,tx-eye-tuning : Manual control to fine tune the capture of the serial + bit lines from the automatic calibrated position. + Two set of 3-tuple setting for each (up to 3) + supported link speed on the host. Range from 0 to + 127 in unit of one bit period. Default is 10. +- apm,tx-eye-direction : Eye tuning manual control direction. 0 means sample + data earlier than the nominal sampling point. 1 means + sample data later than the nominal sampling point. + Two set of 3-tuple setting for each (up to 3) + supported link speed on the host. Default is 0. +- apm,tx-boost-gain : Frequency boost AC (LSB 3-bit) and DC (2-bit) + gain control. Two set of 3-tuple setting for each + (up to 3) supported link speed on the host. Range is + between 0 to 31 in unit of dB. Default is 3. +- apm,tx-amplitude : Amplitude control. Two set of 3-tuple setting for + each (up to 3) supported link speed on the host. + Range is between 0 to 199500 in unit of uV. + Default is 199500 uV. +- apm,tx-pre-cursor1 : 1st pre-cursor emphasis taps control. Two set of + 3-tuple setting for each (up to 3) supported link + speed on the host. Range is 0 to 273000 in unit of + uV. Default is 0. +- apm,tx-pre-cursor2 : 2st pre-cursor emphasis taps control. Two set of + 3-tuple setting for each (up to 3) supported link + speed on the host. Range is 0 to 127400 in unit uV. + Default is 0x0. +- apm,tx-post-cursor : Post-cursor emphasis taps control. Two set of + 3-tuple setting for Gen1, Gen2, and Gen3. Range is + between 0 to 0x1f in unit of 18.2mV. Default is 0xf. +- apm,tx-speed : Tx operating speed. One set of 3-tuple for each + supported link speed on the host. + 0 = 1-2Gbps + 1 = 2-4Gbps (1st tuple default) + 2 = 4-8Gbps + 3 = 8-15Gbps (2nd tuple default) + 4 = 2.5-4Gbps + 5 = 4-5Gbps + 6 = 5-6Gbps + 7 = 6-16Gbps (3rd tuple default) + +NOTE: PHY override parameters are board specific setting. + +Example: + phy1: phy@1f21a000 { + compatible = "apm,xgene-phy"; + reg = <0x0 0x1f21a000 0x0 0x100>; + #phy-cells = <1>; + }; + + phy2: phy@1f22a000 { + compatible = "apm,xgene-phy"; + reg = <0x0 0x1f22a000 0x0 0x100>; + #phy-cells = <1>; + }; + + phy3: phy@1f23a000 { + compatible = "apm,xgene-phy"; + reg = <0x0 0x1f23a000 0x0 0x100>; + #phy-cells = <1>; + }; |