74ad752442
The PHY requires different settings for the Decision Feedback Analyzer (DFE) when running in KX mode vs. KR mode. Update the code to change these settings when changing modes in order to provide a more stable link. Additionally, adjust the 10GbE PQ skew default setting to a more sane value. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
49 lines
1.7 KiB
Plaintext
49 lines
1.7 KiB
Plaintext
* AMD 10GbE PHY driver (amd-xgbe-phy)
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Required properties:
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- compatible: Should be "amd,xgbe-phy-seattle-v1a" and
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"ethernet-phy-ieee802.3-c45"
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- reg: Address and length of the register sets for the device
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- SerDes Rx/Tx registers
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- SerDes integration registers (1/2)
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- SerDes integration registers (2/2)
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- interrupt-parent: Should be the phandle for the interrupt controller
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that services interrupts for this device
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- interrupts: Should contain the amd-xgbe-phy interrupt.
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Optional properties:
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- amd,speed-set: Speed capabilities of the device
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0 - 1GbE and 10GbE (default)
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1 - 2.5GbE and 10GbE
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The following optional properties are represented by an array with each
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value corresponding to a particular speed. The first array value represents
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the setting for the 1GbE speed, the second value for the 2.5GbE speed and
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the third value for the 10GbE speed. All three values are required if the
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property is used.
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- amd,serdes-blwc: Baseline wandering correction enablement
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0 - Off
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1 - On
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- amd,serdes-cdr-rate: CDR rate speed selection
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- amd,serdes-pq-skew: PQ (data sampling) skew
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- amd,serdes-tx-amp: TX amplitude boost
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- amd,serdes-dfe-tap-config: DFE taps available to run
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- amd,serdes-dfe-tap-enable: DFE taps to enable
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Example:
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xgbe_phy@e1240800 {
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compatible = "amd,xgbe-phy-seattle-v1a", "ethernet-phy-ieee802.3-c45";
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reg = <0 0xe1240800 0 0x00400>,
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<0 0xe1250000 0 0x00060>,
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<0 0xe1250080 0 0x00004>;
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interrupt-parent = <&gic>;
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interrupts = <0 323 4>;
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amd,speed-set = <0>;
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amd,serdes-blwc = <1>, <1>, <0>;
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amd,serdes-cdr-rate = <2>, <2>, <7>;
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amd,serdes-pq-skew = <10>, <10>, <30>;
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amd,serdes-tx-amp = <15>, <15>, <10>;
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amd,serdes-dfe-tap-config = <3>, <3>, <1>;
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amd,serdes-dfe-tap-enable = <0>, <0>, <127>;
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};
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