sysreset: add reset controller based reboot driver
Some chips provide their sysreset function in reset controller, which is
normally a bit written to 1 to perform the sysreset.
This patch adds a new sysreset driver to take advantage of it.
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
diff --git a/drivers/sysreset/sysreset_resetctl.c b/drivers/sysreset/sysreset_resetctl.c
new file mode 100644
index 0000000..b8203ba
--- /dev/null
+++ b/drivers/sysreset/sysreset_resetctl.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 MediaTek Inc.
+ *
+ * Author: Weijie Gao <weijie.gao@mediatek.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <sysreset.h>
+#include <reset.h>
+
+struct resetctl_reboot_priv {
+ struct reset_ctl_bulk resets;
+};
+
+static int resetctl_reboot_request(struct udevice *dev, enum sysreset_t type)
+{
+ struct resetctl_reboot_priv *priv = dev_get_priv(dev);
+
+ return reset_assert_bulk(&priv->resets);
+}
+
+static struct sysreset_ops resetctl_reboot_ops = {
+ .request = resetctl_reboot_request,
+};
+
+int resetctl_reboot_probe(struct udevice *dev)
+{
+ struct resetctl_reboot_priv *priv = dev_get_priv(dev);
+
+ return reset_get_bulk(dev, &priv->resets);
+}
+
+static const struct udevice_id resetctl_reboot_ids[] = {
+ { .compatible = "resetctl-reboot" },
+ { }
+};
+
+U_BOOT_DRIVER(resetctl_reboot) = {
+ .id = UCLASS_SYSRESET,
+ .name = "resetctl_reboot",
+ .of_match = resetctl_reboot_ids,
+ .ops = &resetctl_reboot_ops,
+ .priv_auto_alloc_size = sizeof(struct resetctl_reboot_priv),
+ .probe = resetctl_reboot_probe,
+};