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dt-bindings: net: motorcomm: Add pad driver strength cfg

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The motorcomm phy (YT8531) supports the ability to adjust the drive
strength of the rx_clk/rx_data.

The YT8531 RGMII LDO voltage supports 1.8V/3.3V, and the
LDO voltage can be configured with hardware pull-up resistors to match
the SOC voltage (usually 1.8V). The software can read the registers
0xA001 obtain the current LDO voltage value.

Reviewed-by: Hal Feng <hal.feng@starfivetech.com>
Signed-off-by: Samin Guo <samin.guo@starfivetech.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Samin Guo 2023-07-20 19:15:08 +08:00 committed by David S. Miller
parent f5f80e32de
commit 79e71d9569
1 changed files with 34 additions and 0 deletions
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34
Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml
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@ -52,6 +52,40 @@ properties:
for a timer.
type: boolean
motorcomm,rx-clk-drv-microamp:
description: |
drive strength of rx_clk rgmii pad.
The YT8531 RGMII LDO voltage supports 1.8V/3.3V, and the LDO voltage can
be configured with hardware pull-up resistors to match the SOC voltage
(usually 1.8V).
The software can read the registers to obtain the LDO voltage and configure
the legal drive strength(curren).
=====================================================
| voltage | current Available (uA) |
| 1.8v | 1200 2100 2700 2910 3110 3600 3970 4350 |
| 3.3v | 3070 4080 4370 4680 5020 5450 5740 6140 |
=====================================================
enum: [ 1200, 2100, 2700, 2910, 3070, 3110, 3600, 3970,
4080, 4350, 4370, 4680, 5020, 5450, 5740, 6140 ]
default: 2910
motorcomm,rx-data-drv-microamp:
description: |
drive strength of rx_data/rx_ctl rgmii pad.
The YT8531 RGMII LDO voltage supports 1.8V/3.3V, and the LDO voltage can
be configured with hardware pull-up resistors to match the SOC voltage
(usually 1.8V).
The software can read the registers to obtain the LDO voltage and configure
the legal drive strength(curren).
=====================================================
| voltage | current Available (uA) |
| 1.8v | 1200 2100 2700 2910 3110 3600 3970 4350 |
| 3.3v | 3070 4080 4370 4680 5020 5450 5740 6140 |
=====================================================
enum: [ 1200, 2100, 2700, 2910, 3070, 3110, 3600, 3970,
4080, 4350, 4370, 4680, 5020, 5450, 5740, 6140 ]
default: 2910
motorcomm,tx-clk-adj-enabled:
description: |
This configuration is mainly to adapt to VF2 with JH7110 SoC.