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From: Samin Guo <samin.guo@starfivetech.com>
To: <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<netdev@vger.kernel.org>, Peter Geis <pgwipeout@gmail.com>,
	Frank <Frank.Sae@motor-comm.com>
Cc: "David S . Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Rob Herring <robh+dt@kernel.org>, Conor Dooley <conor@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Andrew Lunn <andrew@lunn.ch>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	"Russell King" <linux@armlinux.org.uk>,
	Samin Guo <samin.guo@starfivetech.com>,
	"Yanhong Wang" <yanhong.wang@starfivetech.com>
Subject: [PATCH v5 1/2] dt-bindings: net: motorcomm: Add pad driver strength cfg
Date: Thu, 20 Jul 2023 19:15:08 +0800	[thread overview]
Message-ID: <20230720111509.21843-2-samin.guo@starfivetech.com> (raw)
In-Reply-To: <20230720111509.21843-1-samin.guo@starfivetech.com>

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>
---
 .../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


  reply	other threads:[~2023-07-20 11:15 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-20 11:15 [PATCH v5 0/2] Add motorcomm phy pad-driver-strength-cfg support Samin Guo
2023-07-20 11:15 ` Samin Guo [this message]
2023-07-20 16:00   ` [PATCH v5 1/2] dt-bindings: net: motorcomm: Add pad driver strength cfg Andrew Lunn
2023-07-21  9:18     ` Conor Dooley
2023-07-20 11:15 ` [PATCH v5 2/2] net: phy: motorcomm: Add pad drive strength cfg support Samin Guo
2023-07-20 16:01   ` Andrew Lunn
2023-07-24  9:40 ` [PATCH v5 0/2] Add motorcomm phy pad-driver-strength-cfg support patchwork-bot+netdevbpf

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