diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index c8fa79da23b3..cb210d2978d2 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1820,6 +1820,14 @@ config RALINK_WDT
 	help
 	  Hardware driver for the Ralink SoC Watchdog Timer.
 
+config GXP_WATCHDOG
+	tristate "HPE GXP watchdog support"
+	depends on ARCH_HPE_GXP
+	select WATCHDOG_CORE
+	help
+	  Say Y here to include support for the watchdog timer
+	  in HPE GXP SoCs.
+
 config MT7621_WDT
 	tristate "Mediatek SoC watchdog"
 	select WATCHDOG_CORE
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index f7da867e8782..e2acf3a0d0fc 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -92,6 +92,7 @@ obj-$(CONFIG_RTD119X_WATCHDOG) += rtd119x_wdt.o
 obj-$(CONFIG_SPRD_WATCHDOG) += sprd_wdt.o
 obj-$(CONFIG_PM8916_WATCHDOG) += pm8916_wdt.o
 obj-$(CONFIG_ARM_SMC_WATCHDOG) += arm_smc_wdt.o
+obj-$(CONFIG_GXP_WATCHDOG) += gxp-wdt.o
 obj-$(CONFIG_VISCONTI_WATCHDOG) += visconti_wdt.o
 obj-$(CONFIG_MSC313E_WATCHDOG) += msc313e_wdt.o
 obj-$(CONFIG_APPLE_WATCHDOG) += apple_wdt.o
diff --git a/drivers/watchdog/gxp-wdt.c b/drivers/watchdog/gxp-wdt.c
new file mode 100644
index 000000000000..d2b489cb4774
--- /dev/null
+++ b/drivers/watchdog/gxp-wdt.c
@@ -0,0 +1,191 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2022 Hewlett-Packard Enterprise Development Company, L.P.
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+
+#define MASK_WDGCS_ENABLE	0x01
+#define MASK_WDGCS_RELOAD	0x04
+#define MASK_WDGCS_NMIEN	0x08
+#define MASK_WDGCS_WARN		0x80
+
+#define WDT_MAX_TIMEOUT_MS	655000
+#define WDT_DEFAULT_TIMEOUT	30
+#define SECS_TO_WDOG_TICKS(x) ((x) * 100)
+#define WDOG_TICKS_TO_SECS(x) ((x) / 100)
+
+struct gxp_wdt {
+	void __iomem	*counter;
+	void __iomem	*control;
+	struct watchdog_device	wdd;
+};
+
+static void gxp_wdt_enable_reload(struct gxp_wdt *drvdata)
+{
+	uint8_t val;
+
+	val = readb(drvdata->control);
+	val |= (MASK_WDGCS_ENABLE | MASK_WDGCS_RELOAD);
+	writeb(val, drvdata->control);
+}
+
+static int gxp_wdt_start(struct watchdog_device *wdd)
+{
+	struct gxp_wdt *drvdata = watchdog_get_drvdata(wdd);
+
+	writew((SECS_TO_WDOG_TICKS(wdd->timeout)), drvdata->counter);
+	gxp_wdt_enable_reload(drvdata);
+	return 0;
+}
+
+static int gxp_wdt_stop(struct watchdog_device *wdd)
+{
+	struct gxp_wdt *drvdata = watchdog_get_drvdata(wdd);
+	uint8_t val;
+
+	val = readb_relaxed(drvdata->control);
+	val &= ~MASK_WDGCS_ENABLE;
+	writeb(val, drvdata->control);
+	return 0;
+}
+
+static int gxp_wdt_set_timeout(struct watchdog_device *wdd,
+			       unsigned int timeout)
+{
+	struct gxp_wdt *drvdata = watchdog_get_drvdata(wdd);
+	uint32_t actual;
+
+	wdd->timeout = timeout;
+	actual = min(timeout, wdd->max_hw_heartbeat_ms / 1000);
+	writew((SECS_TO_WDOG_TICKS(actual)), drvdata->counter);
+
+	return 0;
+}
+
+static unsigned int gxp_wdt_get_timeleft(struct watchdog_device *wdd)
+{
+	struct gxp_wdt *drvdata = watchdog_get_drvdata(wdd);
+	uint32_t val = readw(drvdata->counter);
+
+	return WDOG_TICKS_TO_SECS(val);
+}
+
+static int gxp_wdt_ping(struct watchdog_device *wdd)
+{
+	struct gxp_wdt *drvdata = watchdog_get_drvdata(wdd);
+
+	gxp_wdt_enable_reload(drvdata);
+	return 0;
+}
+
+static int gxp_restart(struct watchdog_device *wdd, unsigned long action,
+		       void *data)
+{
+	struct gxp_wdt *drvdata = watchdog_get_drvdata(wdd);
+
+	writew(10, drvdata->counter);
+	gxp_wdt_enable_reload(drvdata);
+	mdelay(100);
+	return 0;
+}
+
+static const struct watchdog_ops gxp_wdt_ops = {
+	.owner =	THIS_MODULE,
+	.start =	gxp_wdt_start,
+	.stop =		gxp_wdt_stop,
+	.ping = gxp_wdt_ping,
+	.set_timeout	= gxp_wdt_set_timeout,
+	.get_timeleft =	gxp_wdt_get_timeleft,
+	.restart =	gxp_restart,
+};
+
+static const struct watchdog_info gxp_wdt_info = {
+	.options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING,
+	.identity = "HPE GXP Watchdog timer",
+};
+
+static int gxp_wdt_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct device *dev = &pdev->dev;
+	struct gxp_wdt *drvdata;
+	int err;
+	uint8_t val;
+
+	drvdata = devm_kzalloc(dev, sizeof(struct gxp_wdt), GFP_KERNEL);
+	if (!drvdata)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, drvdata);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	drvdata->counter = devm_ioremap_resource(dev, res);
+	if (IS_ERR(drvdata->counter))
+		return PTR_ERR(drvdata->counter);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	drvdata->control = devm_ioremap_resource(dev, res);
+	if (IS_ERR(drvdata->control))
+		return PTR_ERR(drvdata->control);
+
+	drvdata->wdd.info = &gxp_wdt_info;
+	drvdata->wdd.ops = &gxp_wdt_ops;
+	drvdata->wdd.max_hw_heartbeat_ms = WDT_MAX_TIMEOUT_MS;
+	drvdata->wdd.parent = &pdev->dev;
+
+	watchdog_set_drvdata(&drvdata->wdd, drvdata);
+	watchdog_init_timeout(&drvdata->wdd, WDT_DEFAULT_TIMEOUT, dev);
+	watchdog_set_nowayout(&drvdata->wdd, WATCHDOG_NOWAYOUT);
+
+	val = readb(drvdata->control);
+	if (val & MASK_WDGCS_ENABLE)
+		set_bit(WDOG_HW_RUNNING, &drvdata->wdd.status);
+
+	watchdog_set_restart_priority(&drvdata->wdd, 128);
+
+	watchdog_stop_on_reboot(&drvdata->wdd);
+	err = devm_watchdog_register_device(dev, &drvdata->wdd);
+	if (err) {
+		dev_err(dev, "Failed to register watchdog device");
+		return err;
+	}
+
+	dev_info(dev, "HPE GXP watchdog timer");
+	return 0;
+}
+
+static int gxp_wdt_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static const struct of_device_id gxp_wdt_of_match[] = {
+	{ .compatible = "hpe,gxp-wdt", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, gxp_wdt_of_match);
+
+static struct platform_driver gxp_wdt_driver = {
+	.probe		= gxp_wdt_probe,
+	.remove		= gxp_wdt_remove,
+	.driver = {
+		.name =		"gxp-wdt",
+		.of_match_table = gxp_wdt_of_match,
+	},
+};
+module_platform_driver(gxp_wdt_driver);
+
+MODULE_AUTHOR("Nick Hawkins <nick.hawkins@hpe.com>");
+MODULE_AUTHOR("Jean-Marie Verdun <verdun@hpe.com>");
+MODULE_DESCRIPTION("Driver for GXP watchdog timer");
