Add a new sysreset driver that uses the recently added watchdog support.
It performs a full SoC reset by calling wdt_expire_now op.
Signed-off-by: Álvaro Fernández Rojas <nolt...@gmail.com>
---
drivers/sysreset/Kconfig | 6 ++++
drivers/sysreset/Makefile | 1 +
drivers/sysreset/sysreset_watchdog.c | 57 ++++++++++++++++++++++++++++++++++++
3 files changed, 64 insertions(+)
create mode 100644 drivers/sysreset/sysreset_watchdog.c
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig
index b2f7464..a6d48e8 100644
--- a/drivers/sysreset/Kconfig
+++ b/drivers/sysreset/Kconfig
@@ -31,4 +31,10 @@ config SYSRESET_SYSCON
help
Reboot support for generic SYSCON mapped register reset.
+config SYSRESET_WATCHDOG
+ bool "Enable support for watchdog reboot driver"
+ select WDT
+ help
+ Reboot support for generic watchdog reset.
+
endmenu
diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile
index bd352e7..b683811 100644
--- a/drivers/sysreset/Makefile
+++ b/drivers/sysreset/Makefile
@@ -7,6 +7,7 @@
obj-$(CONFIG_SYSRESET) += sysreset-uclass.o
obj-$(CONFIG_SYSRESET_PSCI) += sysreset_psci.o
obj-$(CONFIG_SYSRESET_SYSCON) += sysreset_syscon.o
+obj-$(CONFIG_SYSRESET_WATCHDOG) += sysreset_watchdog.o
ifndef CONFIG_SPL_BUILD
obj-$(CONFIG_ROCKCHIP_RK3036) += sysreset_rk3036.o
diff --git a/drivers/sysreset/sysreset_watchdog.c
b/drivers/sysreset/sysreset_watchdog.c
new file mode 100644
index 0000000..caeb039
--- /dev/null
+++ b/drivers/sysreset/sysreset_watchdog.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2017 Álvaro Fernández Rojas <nolt...@gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <sysreset.h>
+#include <wdt.h>
+
+struct wdt_reboot_priv {
+ struct udevice *wdt;
+};
+
+static int wdt_reboot_request(struct udevice *dev, enum sysreset_t type)
+{
+ struct wdt_reboot_priv *priv = dev_get_priv(dev);
+
+ wdt_expire_now(priv->wdt, 0);
+
+ return -EINPROGRESS;
+}
+
+static struct sysreset_ops wdt_reboot_ops = {
+ .request = wdt_reboot_request,
+};
+
+int wdt_reboot_probe(struct udevice *dev)
+{
+ struct wdt_reboot_priv *priv = dev_get_priv(dev);
+ int err;
+
+ err = uclass_get_device_by_phandle(UCLASS_WDT, dev,
+ "wdt", &priv->wdt);
+ if (err) {
+ error("unable to find wdt device\n");
+ return err;
+ }
+
+ return 0;
+}
+
+static const struct udevice_id wdt_reboot_ids[] = {
+ { .compatible = "wdt-reboot" },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(wdt_reboot) = {
+ .name = "wdt_reboot",
+ .id = UCLASS_SYSRESET,
+ .of_match = wdt_reboot_ids,
+ .ops = &wdt_reboot_ops,
+ .priv_auto_alloc_size = sizeof(struct wdt_reboot_priv),
+ .probe = wdt_reboot_probe,
+};
--
2.1.4
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