| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | * APM X-Gene 15Gbps Multi-purpose PHY nodes |
| 2 | |
| 3 | PHY nodes are defined to describe on-chip 15Gbps Multi-purpose PHY. Each |
| 4 | PHY (pair of lanes) has its own node. |
| 5 | |
| 6 | Required properties: |
| 7 | - compatible : Shall be "apm,xgene-phy". |
| 8 | - reg : PHY memory resource is the SDS PHY access resource. |
| 9 | - #phy-cells : Shall be 1 as it expects one argument for setting |
| 10 | the mode of the PHY. Possible values are 0 (SATA), |
| 11 | 1 (SGMII), 2 (PCIe), 3 (USB), and 4 (XFI). |
| 12 | |
| 13 | Optional properties: |
| 14 | - status : Shall be "ok" if enabled or "disabled" if disabled. |
| 15 | Default is "ok". |
| 16 | - clocks : Reference to the clock entry. |
| 17 | - apm,tx-eye-tuning : Manual control to fine tune the capture of the serial |
| 18 | bit lines from the automatic calibrated position. |
| 19 | Two set of 3-tuple setting for each (up to 3) |
| 20 | supported link speed on the host. Range from 0 to |
| 21 | 127 in unit of one bit period. Default is 10. |
| 22 | - apm,tx-eye-direction : Eye tuning manual control direction. 0 means sample |
| 23 | data earlier than the nominal sampling point. 1 means |
| 24 | sample data later than the nominal sampling point. |
| 25 | Two set of 3-tuple setting for each (up to 3) |
| 26 | supported link speed on the host. Default is 0. |
| 27 | - apm,tx-boost-gain : Frequency boost AC (LSB 3-bit) and DC (2-bit) |
| 28 | gain control. Two set of 3-tuple setting for each |
| 29 | (up to 3) supported link speed on the host. Range is |
| 30 | between 0 to 31 in unit of dB. Default is 3. |
| 31 | - apm,tx-amplitude : Amplitude control. Two set of 3-tuple setting for |
| 32 | each (up to 3) supported link speed on the host. |
| 33 | Range is between 0 to 199500 in unit of uV. |
| 34 | Default is 199500 uV. |
| 35 | - apm,tx-pre-cursor1 : 1st pre-cursor emphasis taps control. Two set of |
| 36 | 3-tuple setting for each (up to 3) supported link |
| 37 | speed on the host. Range is 0 to 273000 in unit of |
| 38 | uV. Default is 0. |
| 39 | - apm,tx-pre-cursor2 : 2st pre-cursor emphasis taps control. Two set of |
| 40 | 3-tuple setting for each (up to 3) supported link |
| 41 | speed on the host. Range is 0 to 127400 in unit uV. |
| 42 | Default is 0x0. |
| 43 | - apm,tx-post-cursor : Post-cursor emphasis taps control. Two set of |
| 44 | 3-tuple setting for Gen1, Gen2, and Gen3. Range is |
| 45 | between 0 to 0x1f in unit of 18.2mV. Default is 0xf. |
| 46 | - apm,tx-speed : Tx operating speed. One set of 3-tuple for each |
| 47 | supported link speed on the host. |
| 48 | 0 = 1-2Gbps |
| 49 | 1 = 2-4Gbps (1st tuple default) |
| 50 | 2 = 4-8Gbps |
| 51 | 3 = 8-15Gbps (2nd tuple default) |
| 52 | 4 = 2.5-4Gbps |
| 53 | 5 = 4-5Gbps |
| 54 | 6 = 5-6Gbps |
| 55 | 7 = 6-16Gbps (3rd tuple default) |
| 56 | |
| 57 | NOTE: PHY override parameters are board specific setting. |
| 58 | |
| 59 | Example: |
| 60 | phy1: phy@1f21a000 { |
| 61 | compatible = "apm,xgene-phy"; |
| 62 | reg = <0x0 0x1f21a000 0x0 0x100>; |
| 63 | #phy-cells = <1>; |
| 64 | }; |
| 65 | |
| 66 | phy2: phy@1f22a000 { |
| 67 | compatible = "apm,xgene-phy"; |
| 68 | reg = <0x0 0x1f22a000 0x0 0x100>; |
| 69 | #phy-cells = <1>; |
| 70 | }; |
| 71 | |
| 72 | phy3: phy@1f23a000 { |
| 73 | compatible = "apm,xgene-phy"; |
| 74 | reg = <0x0 0x1f23a000 0x0 0x100>; |
| 75 | #phy-cells = <1>; |
| 76 | }; |