arm: dts: ls2080aqds: add CONFIG_MULTI_DTB_FIT support

Add support for selecting the appropriate DTS file depending on the
SERDES protocol used.

The fsl-ls2080a-qds DTS will be used by default if there isn't a DTS
file specifically made for the current SERDES protocol.

This patch adds the necessary DPMAC nodes (DPMAC 1-8) for
protocol 42 (0x2A) on SD#1.

Also, in case CONFIG_DM_ETH and CONFIG_MULTI_DTB_FIT are enabled
implement the board_fit_config_name_match() function in order to choose
the appropriate DTS.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>

arch/arm/dts/Makefile

@@ -374,6 +374,7 @@ dtb-$(CONFIG_ARCH_LS1021A) += ls1021a-qds-duart.dtb \
 	ls1021a-twr-duart.dtb ls1021a-twr-lpuart.dtb \
 	ls1021a-iot-duart.dtb ls1021a-tsn.dtb
 dtb-$(CONFIG_FSL_LSCH3) += fsl-ls2080a-qds.dtb \
+	fsl-ls2080a-qds-42-x.dtb \
 	fsl-ls2080a-rdb.dtb \
 	fsl-ls2081a-rdb.dtb \
 	fsl-ls2088a-rdb-qspi.dtb \

arch/arm/dts/fsl-ls2080a-qds-42-x.dts

@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0+ OR X11
+/*
+ * NXP LS2080AQDS device tree source for SERDES protocol 42.x
+ *
+ * Copyright 2020 NXP
+ *
+ */
+
+/dts-v1/;
+
+#include "fsl-ls2080a-qds-sd1-42.dtsi"
+
+/ {
+	model = "NXP Layerscape LS2080AQDS Board (DTS 42-x)";
+	compatible = "fsl,ls2080a-qds", "fsl,ls2080a";
+};

arch/arm/dts/fsl-ls2080a-qds-sd1-42.dtsi

@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0+ OR X11
+/*
+ * NXP LS2080aQDS device tree source for SERDES block #1 - protocol 42 (0x2a)
+ *
+ * Copyright 2020 NXP
+ */
+
+#include "fsl-ls2080a-qds.dtsi"
+
+&dpmac1 {
+	status = "okay";
+	phy-connection-type = "xfi";
+};
+
+&dpmac2 {
+	status = "okay";
+	phy-connection-type = "xfi";
+};
+
+&dpmac3 {
+	status = "okay";
+	phy-connection-type = "xfi";
+};
+
+&dpmac4 {
+	status = "okay";
+	phy-connection-type = "xfi";
+};
+
+&dpmac5 {
+	status = "okay";
+	phy-connection-type = "xfi";
+};
+
+&dpmac6 {
+	status = "okay";
+	phy-connection-type = "xfi";
+};
+
+&dpmac7 {
+	status = "okay";
+	phy-connection-type = "xfi";
+};
+
+&dpmac8 {
+	status = "okay";
+	phy-connection-type = "xfi";
+};

arch/arm/dts/fsl-ls2080a-qds.dts

@@ -1,13 +1,13 @@
 // SPDX-License-Identifier: GPL-2.0+ OR X11
 /*
- * Freescale ls2080a QDS board device tree source
+ * Freescale ls2080a QDS defaul board device tree source
  *
  * Copyright 2013-2015 Freescale Semiconductor, Inc.
  */
 
 /dts-v1/;
 
-#include "fsl-ls2080a.dtsi"
+#include "fsl-ls2080a-qds.dtsi"
 
 / {
 	model = "Freescale Layerscape 2080a QDS Board";
@@ -18,71 +18,3 @@
 		spi1 = &dspi;
 	};
 };
-
-&i2c0 {
-	status = "okay";
-	pca9547@77 {
-		compatible = "nxp,pca9547";
-		reg = <0x77>;
-		#address-cells = <1>;
-		#size-cells = <0>;
-		i2c@0 {
-			#address-cells = <1>;
-			#size-cells = <0>;
-			reg = <0x00>;
-			rtc@68 {
-				compatible = "dallas,ds3232";
-				reg = <0x68>;
-			};
-		};
-	};
-};
-
-&dspi {
-	bus-num = <0>;
-	status = "okay";
-
-	dflash0: n25q128a {
-		#address-cells = <1>;
-		#size-cells = <1>;
-		compatible = "jedec,spi-nor";
-		spi-max-frequency = <3000000>;
-		spi-cpol;
-		spi-cpha;
-		reg = <0>;
-	};
-	dflash1: sst25wf040b {
-		#address-cells = <1>;
-		#size-cells = <1>;
-		compatible = "jedec,spi-nor";
-		spi-max-frequency = <3000000>;
-		spi-cpol;
-		spi-cpha;
-		reg = <1>;
-	};
-	dflash2: en25s64 {
-		#address-cells = <1>;
-		#size-cells = <1>;
-		compatible = "jedec,spi-nor";
-		spi-max-frequency = <3000000>;
-		spi-cpol;
-		spi-cpha;
-		reg = <2>;
-	};
-};
-
-&qspi {
-	status = "okay";
-
-	s25fs256s0: flash@0 {
-		#address-cells = <1>;
-		#size-cells = <1>;
-		compatible = "jedec,spi-nor";
-		spi-max-frequency = <50000000>;
-		reg = <0>;
-	};
-};
-
-&sata {
-	status = "okay";
-};

arch/arm/dts/fsl-ls2080a-qds.dtsi

@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0+ OR X11
+/*
+ * Freescale ls2080a QDS common device tree source
+ *
+ * Copyright 2013-2015 Freescale Semiconductor, Inc.
+ * Copyright 2020 NXP
+ */
+
+#include "fsl-ls2080a.dtsi"
+
+&i2c0 {
+	status = "okay";
+	pca9547@77 {
+		compatible = "nxp,pca9547";
+		reg = <0x77>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		i2c@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x00>;
+			rtc@68 {
+				compatible = "dallas,ds3232";
+				reg = <0x68>;
+			};
+		};
+	};
+};
+
+&dspi {
+	bus-num = <0>;
+	status = "okay";
+
+	dflash0: n25q128a {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "jedec,spi-nor";
+		spi-max-frequency = <3000000>;
+		spi-cpol;
+		spi-cpha;
+		reg = <0>;
+	};
+	dflash1: sst25wf040b {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "jedec,spi-nor";
+		spi-max-frequency = <3000000>;
+		spi-cpol;
+		spi-cpha;
+		reg = <1>;
+	};
+	dflash2: en25s64 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "jedec,spi-nor";
+		spi-max-frequency = <3000000>;
+		spi-cpol;
+		spi-cpha;
+		reg = <2>;
+	};
+};
+
+&qspi {
+	status = "okay";
+
+	s25fs256s0: flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "jedec,spi-nor";
+		spi-max-frequency = <50000000>;
+		reg = <0>;
+	};
+};
+
+&sata {
+	status = "okay";
+};

board/freescale/ls2080aqds/eth.c

@@ -989,3 +989,100 @@ void reset_phy(void)
 	mc_env_boot();
 }
 #endif /* CONFIG_RESET_PHY_R */
+
+#if defined(CONFIG_DM_ETH) && defined(CONFIG_MULTI_DTB_FIT)
+
+/* Structure to hold SERDES protocols supported in case of
+ * CONFIG_DM_ETH enabled (network interfaces are described in the DTS).
+ *
+ * @serdes_block: the index of the SERDES block
+ * @serdes_protocol: the decimal value of the protocol supported
+ * @dts_needed: DTS notes describing the current configuration are needed
+ *
+ * When dts_needed is true, the board_fit_config_name_match() function
+ * will try to exactly match the current configuration of the block with a DTS
+ * name provided.
+ */
+static struct serdes_configuration {
+	u8 serdes_block;
+	u32 serdes_protocol;
+	bool dts_needed;
+} supported_protocols[] = {
+	/* Serdes block #1 */
+	{1, 42, true},
+
+	/* Serdes block #2 */
+	{2, 65, false},
+};
+
+#define SUPPORTED_SERDES_PROTOCOLS ARRAY_SIZE(supported_protocols)
+
+static bool protocol_supported(u8 serdes_block, u32 protocol)
+{
+	struct serdes_configuration serdes_conf;
+	int i;
+
+	for (i = 0; i < SUPPORTED_SERDES_PROTOCOLS; i++) {
+		serdes_conf = supported_protocols[i];
+		if (serdes_conf.serdes_block == serdes_block &&
+		    serdes_conf.serdes_protocol == protocol)
+			return true;
+	}
+
+	return false;
+}
+
+static void get_str_protocol(u8 serdes_block, u32 protocol, char *str)
+{
+	struct serdes_configuration serdes_conf;
+	int i;
+
+	for (i = 0; i < SUPPORTED_SERDES_PROTOCOLS; i++) {
+		serdes_conf = supported_protocols[i];
+		if (serdes_conf.serdes_block == serdes_block &&
+		    serdes_conf.serdes_protocol == protocol) {
+			if (serdes_conf.dts_needed == true)
+				sprintf(str, "%u", protocol);
+			else
+				sprintf(str, "x");
+			return;
+		}
+	}
+}
+
+int board_fit_config_name_match(const char *name)
+{
+	struct ccsr_gur *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
+	u32 rcw_status = in_le32(&gur->rcwsr[28]);
+	char srds_s1_str[2], srds_s2_str[2];
+	u32 srds_s1, srds_s2;
+	char expected_dts[100];
+
+	srds_s1 = rcw_status & FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_MASK;
+	srds_s1 >>= FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_SHIFT;
+
+	srds_s2 = rcw_status & FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_MASK;
+	srds_s2 >>= FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_SHIFT;
+
+	/* Check for supported protocols. The default DTS will be used
+	 * in this case
+	 */
+	if (!protocol_supported(1, srds_s1) ||
+	    !protocol_supported(2, srds_s2))
+		return -1;
+
+	get_str_protocol(1, srds_s1, srds_s1_str);
+	get_str_protocol(2, srds_s2, srds_s2_str);
+
+	printf("expected_dts %s\n", expected_dts);
+	sprintf(expected_dts, "fsl-ls2080a-qds-%s-%s",
+		srds_s1_str, srds_s2_str);
+
+	if (!strcmp(name, expected_dts))
+		return 0;
+
+	printf("this is not!\n");
+	return -1;
+}
+
+#endif