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Message-ID: <20230720111509.21843-2-samin.guo@starfivetech.com>
Date: Thu, 20 Jul 2023 19:15:08 +0800
From: Samin Guo <samin.guo@...rfivetech.com>
To: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
<netdev@...r.kernel.org>, Peter Geis <pgwipeout@...il.com>,
Frank <Frank.Sae@...or-comm.com>
CC: "David S . Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Rob Herring <robh+dt@...nel.org>,
Conor Dooley <conor@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Andrew Lunn <andrew@...n.ch>,
Heiner Kallweit <hkallweit1@...il.com>,
"Russell King" <linux@...linux.org.uk>,
Samin Guo <samin.guo@...rfivetech.com>,
"Yanhong Wang" <yanhong.wang@...rfivetech.com>
Subject: [PATCH v5 1/2] dt-bindings: net: motorcomm: Add pad driver strength cfg
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@...rfivetech.com>
Signed-off-by: Samin Guo <samin.guo@...rfivetech.com>
---
.../bindings/net/motorcomm,yt8xxx.yaml | 34 +++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml b/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml
index 157e3bbcaf6f..605be74f8556 100644
--- a/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml
+++ b/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml
@@ -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 | curren 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 | curren 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.
--
2.17.1
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