linux-kernel - [PATCH net-next v2 35/35] arm64: dts: ls1046ardb: Add serdes bindings

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Message-Id: <20220628221404.1444200-36-sean.anderson@seco.com>
Date:   Tue, 28 Jun 2022 18:14:04 -0400
From:   Sean Anderson <sean.anderson@...o.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Madalin Bucur <madalin.bucur@....com>, netdev@...r.kernel.org
Cc:     Russell King <linux@...linux.org.uk>,
        Paolo Abeni <pabeni@...hat.com>,
        linux-arm-kernel@...ts.infradead.org,
        Eric Dumazet <edumazet@...gle.com>,
        linux-kernel@...r.kernel.org,
        Sean Anderson <sean.anderson@...o.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Li Yang <leoyang.li@....com>, Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        devicetree@...r.kernel.org, linux-phy@...ts.infradead.org
Subject: [PATCH net-next v2 35/35] arm64: dts: ls1046ardb: Add serdes bindings

This adds appropriate bindings for the macs which use the SerDes. The
156.25MHz fixed clock is a crystal. The 100MHz clocks (there are
actually 3) come from a Renesas 6V49205B at address 69 on i2c0. There is
no driver for this device (and as far as I know all you can do with the
100MHz clocks is gate them), so I have chosen to model it as a single
fixed clock.

Note: the SerDes1 lane numbering for the LS1046A is *reversed*.
This means that Lane A (what the driver thinks is lane 0) uses pins
SD1_TX3_P/N.

Because this will break ethernet if the serdes is not enabled, enable
the serdes driver by default on Layerscape.

Signed-off-by: Sean Anderson <sean.anderson@...o.com>
---
Please let me know if there is a better/more specific config I can use
here.

(no changes since v1)

 .../boot/dts/freescale/fsl-ls1046a-rdb.dts    | 34 +++++++++++++++++++
 drivers/phy/freescale/Kconfig                 |  1 +
 2 files changed, 35 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts
index 7025aad8ae89..4f4dd0ed8c53 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts
@@ -26,6 +26,32 @@ aliases {
 	chosen {
 		stdout-path = "serial0:115200n8";
 	};
+
+	clocks {
+		clk_100mhz: clock-100mhz {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <100000000>;
+		};
+
+		clk_156mhz: clock-156mhz {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <156250000>;
+		};
+	};
+};
+
+&serdes1 {
+	clocks = <&clk_100mhz>, <&clk_156mhz>;
+	clock-names = "ref0", "ref1";
+	status = "okay";
+};
+
+&serdes2 {
+	clocks = <&clk_100mhz>, <&clk_100mhz>;
+	clock-names = "ref0", "ref1";
+	status = "okay";
 };
 
 &duart0 {
@@ -140,21 +166,29 @@ ethernet@...00 {
 	ethernet@...00 {
 		phy-handle = <&sgmii_phy1>;
 		phy-connection-type = "sgmii";
+		phys = <&serdes1 1>;
+		phy-names = "serdes";
 	};
 
 	ethernet@...00 {
 		phy-handle = <&sgmii_phy2>;
 		phy-connection-type = "sgmii";
+		phys = <&serdes1 0>;
+		phy-names = "serdes";
 	};
 
 	ethernet@...00 { /* 10GEC1 */
 		phy-handle = <&aqr106_phy>;
 		phy-connection-type = "xgmii";
+		phys = <&serdes1 3>;
+		phy-names = "serdes";
 	};
 
 	ethernet@...00 { /* 10GEC2 */
 		fixed-link = <0 1 1000 0 0>;
 		phy-connection-type = "xgmii";
+		phys = <&serdes1 2>;
+		phy-names = "serdes";
 	};
 
 	mdio@...00 {
diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig
index 857b4d123515..c9f687384c13 100644
--- a/drivers/phy/freescale/Kconfig
+++ b/drivers/phy/freescale/Kconfig
@@ -43,6 +43,7 @@ config PHY_FSL_LYNX_10G
 	tristate "Freescale Layerscale Lynx 10G SerDes support"
 	select GENERIC_PHY
 	select REGMAP_MMIO
+	default y if ARCH_LAYERSCAPE
 	help
 	  This adds support for the Lynx "SerDes" devices found on various QorIQ
 	  SoCs. There may be up to four SerDes devices on each SoC, and each
-- 
2.35.1.1320.gc452695387.dirty