efi: app: Add a sysreset driver

This adds the DM sysreset driver for EFI application support.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

lib/efi/efi_app.c

@@ -10,11 +10,13 @@
 
 #include <common.h>
 #include <debug_uart.h>
+#include <dm.h>
 #include <errno.h>
 #include <linux/err.h>
 #include <linux/types.h>
 #include <efi.h>
 #include <efi_api.h>
+#include <sysreset.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -129,7 +131,7 @@ efi_status_t EFIAPI efi_main(efi_handle_t image,
 	return EFI_SUCCESS;
 }
 
-void reset_cpu(ulong addr)
+static void efi_exit(void)
 {
 	struct efi_priv *priv = global_priv;
 
@@ -137,3 +139,27 @@ void reset_cpu(ulong addr)
 	printf("U-Boot EFI exiting\n");
 	priv->boot->exit(priv->parent_image, EFI_SUCCESS, 0, NULL);
 }
+
+static int efi_sysreset_request(struct udevice *dev, enum sysreset_t type)
+{
+	efi_exit();
+
+	return -EINPROGRESS;
+}
+
+static const struct udevice_id efi_sysreset_ids[] = {
+	{ .compatible = "efi,reset" },
+	{ }
+};
+
+static struct sysreset_ops efi_sysreset_ops = {
+	.request = efi_sysreset_request,
+};
+
+U_BOOT_DRIVER(efi_sysreset) = {
+	.name = "efi-sysreset",
+	.id = UCLASS_SYSRESET,
+	.of_match = efi_sysreset_ids,
+	.ops = &efi_sysreset_ops,
+	.flags = DM_FLAG_PRE_RELOC,
+};