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Message-ID: <20251103-rgmii_delay_2600-v3-1-e2af2656f7d7@aspeedtech.com>
Date: Mon, 3 Nov 2025 15:39:16 +0800
From: Jacky Chou <jacky_chou@...eedtech.com>
To: Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
<davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski
<kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Rob Herring
<robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
<conor+dt@...nel.org>, Po-Yu Chuang <ratbert@...aday-tech.com>, Joel Stanley
<joel@....id.au>, Andrew Jeffery <andrew@...econstruct.com.au>
CC: <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
<linux-aspeed@...ts.ozlabs.org>, <taoren@...a.com>, Jacky Chou
<jacky_chou@...eedtech.com>
Subject: [PATCH net-next v3 1/4] dt-bindings: net: ftgmac100: Add delay
properties for AST2600
Create the new compatibles to identify AST2600 MAC0/1 and MAC3/4.
Add conditional schema constraints for Aspeed AST2600 MAC controllers:
- For "aspeed,ast2600-mac01", require rx/tx-internal-delay-ps properties
with 45ps step.
- For "aspeed,ast2600-mac23", require rx/tx-internal-delay-ps properties
with 250ps step.
- Both require the "scu" property.
Other compatible values remain unrestricted.
Signed-off-by: Jacky Chou <jacky_chou@...eedtech.com>
---
.../devicetree/bindings/net/faraday,ftgmac100.yaml | 50 ++++++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/faraday,ftgmac100.yaml b/Documentation/devicetree/bindings/net/faraday,ftgmac100.yaml
index d14410018bcf..de646e7e3bca 100644
--- a/Documentation/devicetree/bindings/net/faraday,ftgmac100.yaml
+++ b/Documentation/devicetree/bindings/net/faraday,ftgmac100.yaml
@@ -19,6 +19,12 @@ properties:
- aspeed,ast2500-mac
- aspeed,ast2600-mac
- const: faraday,ftgmac100
+ - items:
+ - enum:
+ - aspeed,ast2600-mac01
+ - aspeed,ast2600-mac23
+ - const: aspeed,ast2600-mac
+ - const: faraday,ftgmac100
reg:
maxItems: 1
@@ -69,6 +75,12 @@ properties:
mdio:
$ref: /schemas/net/mdio.yaml#
+ scu:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ Phandle to the SCU (System Control Unit) syscon node for Aspeed platform.
+ This reference is used by the MAC controller to configure the RGMII delays.
+
required:
- compatible
- reg
@@ -88,6 +100,44 @@ allOf:
else:
properties:
resets: false
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: aspeed,ast2600-mac01
+ then:
+ properties:
+ rx-internal-delay-ps:
+ minimum: 0
+ maximum: 1395
+ multipleOf: 45
+ tx-internal-delay-ps:
+ minimum: 0
+ maximum: 1395
+ multipleOf: 45
+ required:
+ - scu
+ - rx-internal-delay-ps
+ - tx-internal-delay-ps
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: aspeed,ast2600-mac23
+ then:
+ properties:
+ rx-internal-delay-ps:
+ minimum: 0
+ maximum: 7750
+ multipleOf: 250
+ tx-internal-delay-ps:
+ minimum: 0
+ maximum: 7750
+ multipleOf: 250
+ required:
+ - scu
+ - rx-internal-delay-ps
+ - tx-internal-delay-ps
unevaluatedProperties: false
--
2.34.1
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