1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/sysreset/sysreset_gpio.c b/drivers/sysreset/sysreset_gpio.c
new file mode 100644
index 0000000000..ed9a49ad08
--- /dev/null
+++ b/drivers/sysreset/sysreset_gpio.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 Xilinx, Inc. - Michal Simek
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <sysreset.h>
+#include <asm/gpio.h>
+
+struct gpio_reboot_priv {
+	struct gpio_desc gpio;
+};
+
+static int gpio_reboot_request(struct udevice *dev, enum sysreset_t type)
+{
+	struct gpio_reboot_priv *priv = dev_get_priv(dev);
+
+	/*
+	 * When debug log is enabled please make sure that chars won't end up
+	 * in output fifo. Or you can append udelay(); to get enough time
+	 * to HW to emit output fifo.
+	 */
+	debug("GPIO reset\n");
+
+	/* Writing 1 respects polarity (active high/low) based on gpio->flags */
+	return dm_gpio_set_value(&priv->gpio, 1);
+}
+
+static struct sysreset_ops gpio_reboot_ops = {
+	.request = gpio_reboot_request,
+};
+
+int gpio_reboot_probe(struct udevice *dev)
+{
+	struct gpio_reboot_priv *priv = dev_get_priv(dev);
+
+	/*
+	 * Linux kernel DT binding contain others optional properties
+	 * which are not supported now
+	 */
+
+	return gpio_request_by_name(dev, "gpios", 0, &priv->gpio, GPIOD_IS_OUT);
+}
+
+static const struct udevice_id led_gpio_ids[] = {
+	{ .compatible = "gpio-restart" },
+	{ }
+};
+
+U_BOOT_DRIVER(gpio_reboot) = {
+	.id = UCLASS_SYSRESET,
+	.name = "gpio_restart",
+	.of_match = led_gpio_ids,
+	.ops = &gpio_reboot_ops,
+	.priv_auto_alloc_size = sizeof(struct gpio_reboot_priv),
+	.probe = gpio_reboot_probe,
+};