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From: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Date: Mon, 22 Apr 2024 10:46:17 +0200
Subject: [PATCH 1/3] dt-bindings: net: mx93: add enet_clk_sel binding
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Message-Id: <20240422-v6-9-topic-imx93-eqos-rmii-v1-1-30151fca43d2@pengutronix.de>
References: <20240422-v6-9-topic-imx93-eqos-rmii-v1-0-30151fca43d2@pengutronix.de>
In-Reply-To: <20240422-v6-9-topic-imx93-eqos-rmii-v1-0-30151fca43d2@pengutronix.de>
To: "David S. Miller" <davem@davemloft.net>, 
 Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, 
 Paolo Abeni <pabeni@redhat.com>, Rob Herring <robh@kernel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, 
 Conor Dooley <conor+dt@kernel.org>, Shawn Guo <shawnguo@kernel.org>, 
 Sascha Hauer <s.hauer@pengutronix.de>, 
 Pengutronix Kernel Team <kernel@pengutronix.de>, 
 Fabio Estevam <festevam@gmail.com>, Clark Wang <xiaoning.wang@nxp.com>, 
 Linux Team <linux-imx@nxp.com>, 
 Alexandre Torgue <alexandre.torgue@foss.st.com>, 
 Jose Abreu <joabreu@synopsys.com>, 
 Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, 
 linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, 
 linux-stm32@st-md-mailman.stormreply.com

When the eQOS on the i.MX93 is used in RMII mode, the TX_CLK must be set
to output mode. To do this, the ENET_CLK_SEL register must be accessed.
This register is located in a GPR register space.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
---
 Documentation/devicetree/bindings/net/nxp,dwmac-imx.yaml | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/nxp,dwmac-imx.yaml b/Documentation/devicetree/bindings/net/nxp,dwmac-imx.yaml
index 4c01cae7c93a7..1d1c8b90da871 100644
--- a/Documentation/devicetree/bindings/net/nxp,dwmac-imx.yaml
+++ b/Documentation/devicetree/bindings/net/nxp,dwmac-imx.yaml
@@ -56,6 +56,16 @@ properties:
         - tx
         - mem
 
+  enet_clk_sel:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description: phandle to the GPR syscon
+          - description: the offset of the GPR register
+    description:
+      Should be phandle/offset pair. The phandle to the syscon node which
+      encompases the GPR register, and the offset of the GPR register.
+
   intf_mode:
     $ref: /schemas/types.yaml#/definitions/phandle-array
     items:

-- 
2.43.2