77 lines
2.9 KiB
Plaintext
77 lines
2.9 KiB
Plaintext
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* APM X-Gene 15Gbps Multi-purpose PHY nodes
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PHY nodes are defined to describe on-chip 15Gbps Multi-purpose PHY. Each
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PHY (pair of lanes) has its own node.
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Required properties:
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- compatible : Shall be "apm,xgene-phy".
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- reg : PHY memory resource is the SDS PHY access resource.
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- #phy-cells : Shall be 1 as it expects one argument for setting
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the mode of the PHY. Possible values are 0 (SATA),
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1 (SGMII), 2 (PCIe), 3 (USB), and 4 (XFI).
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Optional properties:
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- status : Shall be "ok" if enabled or "disabled" if disabled.
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Default is "ok".
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- clocks : Reference to the clock entry.
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- apm,tx-eye-tuning : Manual control to fine tune the capture of the serial
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bit lines from the automatic calibrated position.
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Two set of 3-tuple setting for each (up to 3)
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supported link speed on the host. Range from 0 to
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127 in unit of one bit period. Default is 10.
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- apm,tx-eye-direction : Eye tuning manual control direction. 0 means sample
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data earlier than the nominal sampling point. 1 means
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sample data later than the nominal sampling point.
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Two set of 3-tuple setting for each (up to 3)
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supported link speed on the host. Default is 0.
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- apm,tx-boost-gain : Frequency boost AC (LSB 3-bit) and DC (2-bit)
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gain control. Two set of 3-tuple setting for each
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(up to 3) supported link speed on the host. Range is
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between 0 to 31 in unit of dB. Default is 3.
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- apm,tx-amplitude : Amplitude control. Two set of 3-tuple setting for
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each (up to 3) supported link speed on the host.
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Range is between 0 to 199500 in unit of uV.
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Default is 199500 uV.
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- apm,tx-pre-cursor1 : 1st pre-cursor emphasis taps control. Two set of
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3-tuple setting for each (up to 3) supported link
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speed on the host. Range is 0 to 273000 in unit of
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uV. Default is 0.
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- apm,tx-pre-cursor2 : 2st pre-cursor emphasis taps control. Two set of
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3-tuple setting for each (up to 3) supported link
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speed on the host. Range is 0 to 127400 in unit uV.
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Default is 0x0.
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- apm,tx-post-cursor : Post-cursor emphasis taps control. Two set of
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3-tuple setting for Gen1, Gen2, and Gen3. Range is
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between 0 to 0x1f in unit of 18.2mV. Default is 0xf.
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- apm,tx-speed : Tx operating speed. One set of 3-tuple for each
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supported link speed on the host.
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0 = 1-2Gbps
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1 = 2-4Gbps (1st tuple default)
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2 = 4-8Gbps
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3 = 8-15Gbps (2nd tuple default)
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4 = 2.5-4Gbps
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5 = 4-5Gbps
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6 = 5-6Gbps
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7 = 6-16Gbps (3rd tuple default)
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NOTE: PHY override parameters are board specific setting.
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Example:
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phy1: phy@1f21a000 {
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compatible = "apm,xgene-phy";
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reg = <0x0 0x1f21a000 0x0 0x100>;
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#phy-cells = <1>;
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};
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phy2: phy@1f22a000 {
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compatible = "apm,xgene-phy";
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reg = <0x0 0x1f22a000 0x0 0x100>;
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#phy-cells = <1>;
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};
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phy3: phy@1f23a000 {
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compatible = "apm,xgene-phy";
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reg = <0x0 0x1f23a000 0x0 0x100>;
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#phy-cells = <1>;
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};
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