board: hpe: gxp: add HPE GXP soc support

Add basic support for the HPE GXP SoC. Reset the EHCI controller at
boot.

Signed-off-by: Nick Hawkins <nick.hawkins@hpe.com>

board/hpe/gxp/Kconfig

@@ -0,0 +1,46 @@
+choice
+	prompt "SoC select"
+
+config TARGET_GXP
+	bool "GXP"
+	select DM
+	select SOC_GXP
+	imply CMD_DM
+
+config TARGET_GXP2
+	bool "GXP2"
+	select DM
+	select SOC_GXP
+	select GXP_ECC
+	imply CMD_DM
+
+endchoice
+
+choice
+	prompt "GXP VROM size"
+	default GXP_VROM_64MB
+	optional
+
+config GXP_VROM_64MB
+	bool "64MB"
+
+config GXP_VROM_32MB
+	bool "32MB"
+endchoice
+
+config GXP_ECC
+	bool "Enable memory ECC protected"
+	help
+	  Use half of memory to enable ECC protected
+
+config SYS_BOARD
+	default "gxp"
+
+config SYS_VENDOR
+	default "hpe"
+
+config SYS_CONFIG_NAME
+	default "gxp"
+
+config SYS_TEXT_BASE
+	default 0x50000000

board/hpe/gxp/Makefile

@@ -0,0 +1 @@
+obj-y += gxp_board.o

board/hpe/gxp/gxp_board.c

@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * GXP timer driver
+ *
+ * (C) Copyright 2022 Hewlett Packard Enterprise Development LP.
+ * Author: Nick Hawkins <nick.hawkins@hpe.com>
+ * Author: Jean-Marie Verdun <verdun@hpe.com>
+ */
+
+#include <linux/sizes.h>
+#include <asm/io.h>
+#include <dm.h>
+#include <dm/uclass.h>
+#include <ram.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define ECHI_CMD 0xcefe0010
+
+int board_init(void)
+{
+	writel(0x00080002, ECHI_CMD);
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	if (IS_ENABLED(CONFIG_TARGET_GXP)) {
+		if (IS_ENABLED(CONFIG_GXP_ECC)) {
+			/* 0x0f800000 */
+			gd->ram_size = SZ_128M + SZ_64M + SZ_32M + SZ_16M + SZ_8M;
+		} else {
+			/* 0x1f000000 */
+			gd->ram_size = SZ_256M + SZ_128M + SZ_64M + SZ_32M + SZ_16M;
+		}
+
+		if (IS_ENABLED(CONFIG_GXP_VROM_64MB)) {
+			if (IS_ENABLED(CONFIG_GXP_ECC)) {
+				/* 0x0c000000 */
+				gd->ram_size = SZ_128M + SZ_64M;
+			} else {
+				/* 0x18000000 */
+				gd->ram_size = SZ_256M + SZ_128M;
+			}
+		}
+
+		if (IS_ENABLED(CONFIG_GXP_VROM_32MB)) {
+			if (IS_ENABLED(CONFIG_GXP_ECC)) {
+				/* 0x0e000000 */
+				gd->ram_size = SZ_128M + SZ_64M + SZ_32M;
+			} else {
+				/* 0x1c000000 */
+				gd->ram_size = SZ_256M + SZ_128M + SZ_64M;
+			}
+		}
+	}
+
+	if (IS_ENABLED(CONFIG_TARGET_GXP2)) {
+		/* 0x1b200000 */
+		gd->ram_size = SZ_256M + SZ_128M + SZ_32M + SZ_16M + SZ_2M;
+		if (IS_ENABLED(CONFIG_GXP_VROM_64MB)) {
+			/* 0x14000000 */
+			gd->ram_size = SZ_256M + SZ_64M;
+		}
+
+		if (IS_ENABLED(CONFIG_GXP_VROM_32MB)) {
+			/* 0x18000000 */
+			gd->ram_size = SZ_256M + SZ_128M;
+		}
+	}
+
+	return 0;
+}
+