arm: mvebu: Add CRS305-1G-4S board

CRS305-1G-4S has a switch chip with an integrated CPU (98DX3236) and
like some of the other similar boards requires bin_hdr.
bin_hdr (DDR3 init stage) is currently retrieved from the stock
bootloader and compiled into the kwb image.

Adds support for U-Boot, enable UART, SPI, Winbond SPI flash chip
support and writing env to SPI flash.

Signed-off-by: Luka Kovacic <me@lukakovacic.xyz>
Reviewed-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>

4 files changed, 132 insertions, 1 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 8b971434eb..56bf5aa8de 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -162,7 +162,8 @@ dtb-$(CONFIG_ARCH_MVEBU) +=			\
 	armada-38x-controlcenterdc.dtb		\
 	armada-385-atl-x530.dtb			\
 	armada-385-atl-x530DP.dtb		\
-	armada-xp-db-xc3-24g4xg.dtb
+	armada-xp-db-xc3-24g4xg.dtb		\
+	armada-xp-crs305-1g-4s.dtb
 
 dtb-$(CONFIG_ARCH_UNIPHIER_LD11) += \
 	uniphier-ld11-global.dtb \
diff --git a/arch/arm/dts/armada-xp-crs305-1g-4s-u-boot.dtsi b/arch/arm/dts/armada-xp-crs305-1g-4s-u-boot.dtsi
new file mode 100644
index 0000000000..8576a02730
--- /dev/null
+++ b/arch/arm/dts/armada-xp-crs305-1g-4s-u-boot.dtsi
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+&uart0 {
+	u-boot,dm-pre-reloc;
+};
+
+&spi0 {
+	u-boot,dm-pre-reloc;
+
+	spi-flash@0 {
+		u-boot,dm-pre-reloc;
+	};
+};
diff --git a/arch/arm/dts/armada-xp-crs305-1g-4s.dts b/arch/arm/dts/armada-xp-crs305-1g-4s.dts
new file mode 100644
index 0000000000..1116f5c96c
--- /dev/null
+++ b/arch/arm/dts/armada-xp-crs305-1g-4s.dts
@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Device Tree file for CRS305-1G-4S board
+ *
+ * Copyright (C) 2016 Allied Telesis Labs
+ *
+ * Based on armada-xp-db.dts
+ *
+ * Note: this Device Tree assumes that the bootloader has remapped the
+ * internal registers to 0xf1000000 (instead of the default
+ * 0xd0000000). The 0xf1000000 is the default used by the recent,
+ * DT-capable, U-Boot bootloaders provided by Marvell. Some earlier
+ * boards were delivered with an older version of the bootloader that
+ * left internal registers mapped at 0xd0000000. If you are in this
+ * situation, you should either update your bootloader (preferred
+ * solution) or the below Device Tree should be adjusted.
+ */
+
+/dts-v1/;
+#include "armada-xp-98dx3236.dtsi"
+#include "armada-xp-crs305-1g-4s-u-boot.dtsi"
+
+/ {
+	model = "CRS305-1G-4S";
+	compatible = "marvell,armadaxp-98dx3236", "marvell,armadaxp-mv78260", "marvell,armadaxp", "marvell,armada-370-xp";
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+		bootargs = "console=ttyS0,115200 earlyprintk";
+	};
+
+	aliases {
+		spi0 = &spi0;
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0 0x00000000 0 0x20000000>; /* 512 MB */
+	};
+};
+
+&L2 {
+	arm,parity-enable;
+	marvell,ecc-enable;
+};
+
+&devbus_bootcs {
+	status = "okay";
+
+	/* Device Bus parameters are required */
+
+	/* Read parameters */
+	devbus,bus-width    = <16>;
+	devbus,turn-off-ps  = <60000>;
+	devbus,badr-skew-ps = <0>;
+	devbus,acc-first-ps = <124000>;
+	devbus,acc-next-ps  = <248000>;
+	devbus,rd-setup-ps  = <0>;
+	devbus,rd-hold-ps   = <0>;
+
+	/* Write parameters */
+	devbus,sync-enable = <0>;
+	devbus,wr-high-ps  = <60000>;
+	devbus,wr-low-ps   = <60000>;
+	devbus,ale-wr-ps   = <60000>;
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&uart1 {
+	status = "okay";
+};
+
+&i2c0 {
+	clock-frequency = <100000>;
+	status = "okay";
+};
+
+&usb0 {
+	status = "okay";
+};
+
+&spi0 {
+	status = "okay";
+
+	spi-flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "spi-flash", "jedec,spi-nor";
+		reg = <0>; /* Chip select 0 */
+		spi-max-frequency = <108000000>;
+		m25p,fast-read;
+
+		partition@u-boot {
+			reg = <0x00000000 0x00100000>;
+			label = "u-boot";
+		};
+		partition@u-boot-env {
+			reg = <0x00100000 0x00040000>;
+			label = "u-boot-env";
+		};
+		partition@unused {
+			reg = <0x00140000 0x00ec0000>;
+			label = "unused";
+		};
+
+	};
+};
diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index a832e1dc8c..495c48e6c7 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -164,6 +164,10 @@ config TARGET_DB_XC3_24G4XG
 	bool "Support DB-XC3-24G4XG"
 	select 98DX3336
 
+config TARGET_CRS305_1G_4S
+	bool "Support CRS305-1G-4S"
+	select 98DX3236
+
 endchoice
 
 config SYS_BOARD
@@ -183,6 +187,7 @@ config SYS_BOARD
 	default "a38x" if TARGET_CONTROLCENTERDC
 	default "x530" if TARGET_X530
 	default "db-xc3-24g4xg" if TARGET_DB_XC3_24G4XG
+	default "crs305-1g-4s" if TARGET_CRS305_1G_4S
 
 config SYS_CONFIG_NAME
 	default "clearfog" if TARGET_CLEARFOG
@@ -201,6 +206,7 @@ config SYS_CONFIG_NAME
 	default "controlcenterdc" if TARGET_CONTROLCENTERDC
 	default "x530" if TARGET_X530
 	default "db-xc3-24g4xg" if TARGET_DB_XC3_24G4XG
+	default "crs305-1g-4s" if TARGET_CRS305_1G_4S
 
 config SYS_VENDOR
 	default "Marvell" if TARGET_DB_MV784MP_GP
@@ -218,6 +224,7 @@ config SYS_VENDOR
 	default "CZ.NIC" if TARGET_TURRIS_MOX
 	default "gdsys" if TARGET_CONTROLCENTERDC
 	default "alliedtelesis" if TARGET_X530
+	default "mikrotik" if TARGET_CRS305_1G_4S
 
 config SYS_SOC
 	default "mvebu"