[PATCH v4 7/8] arm64: dts: ls1046ardb: Add serdes bindings

[Sean Anderson]

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 at seco.com>
---
This depends on [1].

[1] https://lore.kernel.org/netdev/20220804194705.459670-4-sean.anderson@seco.com/

Changes in v4:
- Convert to new bindings

 .../boot/dts/freescale/fsl-ls1046a-rdb.dts    | 112 ++++++++++++++++++
 drivers/phy/freescale/Kconfig                 |   1 +
 2 files changed, 113 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..a848556bd7db 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts
@@ -10,6 +10,8 @@
 
 /dts-v1/;
 
+#include <dt-bindings/phy/phy.h>
+
 #include "fsl-ls1046a.dtsi"
 
 / {
@@ -26,8 +28,110 @@ 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";
+
+	/*
+	 * XXX: Lane A uses pins SD1_RX3_P/N! That is, the lane numbers and pin
+	 * numbers are _reversed_. In addition, the PCCR documentation is
+	 * _inconsistent_ in its usage of these terms!
+	 *
+	 * PCCR "Lane 0" refers to...
+	 * ==== =====================
+	 *    0 Lane A
+	 *    2 Lane A
+	 *    8 Lane A
+	 *    9 Lane A
+	 *    B Lane D!
+	 */
+	serdes1_0: phy at 0 {
+		#phy-cells = <0>;
+		reg = <0>;
+
+		/* SGMII.6 */
+		sgmii-0 {
+			fsl,pccr = <0x8>;
+			fsl,index = <0>;
+			fsl,cfg = <0x1>;
+			fsl,type = <PHY_TYPE_SGMII>;
+		};
+	};
+
+	serdes1_1: phy at 1 {
+		#phy-cells = <0>;
+		reg = <1>;
+
+		/* SGMII.5 */
+		sgmii-1 {
+			fsl,pccr = <0x8>;
+			fsl,index = <1>;
+			fsl,cfg = <0x1>;
+			fsl,type = <PHY_TYPE_2500BASEX>;
+		};
+	};
+
+	serdes1_2: phy at 2 {
+		#phy-cells = <0>;
+		reg = <2>;
+
+		/* SGMII.10 */
+		sgmii-2 {
+			fsl,pccr = <0x8>;
+			fsl,index = <2>;
+			fsl,cfg = <0x1>;
+			fsl,type = <PHY_TYPE_2500BASEX>;
+		};
+
+		/* XFI.10 */
+		xfi-0 {
+			fsl,pccr = <0xb>;
+			fsl,index = <0>;
+			fsl,cfg = <0x2>;
+			fsl,type = <PHY_TYPE_10GBASER>;
+		};
+	};
+
+	serdes1_3: phy at 3 {
+		#phy-cells = <0>;
+		reg = <3>;
+
+		/* SGMII.9 */
+		sgmii-3 {
+			fsl,pccr = <0x8>;
+			fsl,index = <3>;
+			fsl,cfg = <0x1>;
+			fsl,type = <PHY_TYPE_2500BASEX>;
+		};
+
+		/* XGI.9 */
+		xfi-9 {
+			fsl,pccr = <0xb>;
+			fsl,index = <1>;
+			fsl,cfg = <0x1>;
+			fsl,type = <PHY_TYPE_10GBASER>;
+		};
+	};
+};
+
+
 &duart0 {
 	status = "okay";
 };
@@ -140,21 +244,29 @@ ethernet at e6000 {
 	ethernet at e8000 {
 		phy-handle = <&sgmii_phy1>;
 		phy-connection-type = "sgmii";
+		phys = <&serdes1_1>;
+		phy-names = "serdes";
 	};
 
 	ethernet at ea000 {
 		phy-handle = <&sgmii_phy2>;
 		phy-connection-type = "sgmii";
+		phys = <&serdes1_0>;
+		phy-names = "serdes";
 	};
 
 	ethernet at f0000 { /* 10GEC1 */
 		phy-handle = <&aqr106_phy>;
 		phy-connection-type = "xgmii";
+		phys = <&serdes1_3>;
+		phy-names = "serdes";
 	};
 
 	ethernet at f2000 { /* 10GEC2 */
 		fixed-link = <0 1 1000 0 0>;
 		phy-connection-type = "xgmii";
+		phys = <&serdes1_2>;
+		phy-names = "serdes";
 	};
 
 	mdio at fc000 {
diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig
index fe2a3efe0ba4..9595666213d0 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