This driver is using SetWatchdogTimer() UEFI interface and was
tested on iBASE MI991AF Mini-ITX motherboard.
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
common/efi/efi.c | 9 +++++-
drivers/watchdog/Kconfig | 6 ++++
drivers/watchdog/Makefile | 1 +
drivers/watchdog/efi_wdt.c | 64 ++++++++++++++++++++++++++++++++++++++
4 files changed, 79 insertions(+), 1 deletion(-)
create mode 100644 drivers/watchdog/efi_wdt.c
diff --git a/common/efi/efi.c b/common/efi/efi.c
index 1f451a157e..a7b25cbbe2 100644
--- a/common/efi/efi.c
+++ b/common/efi/efi.c
@@ -367,8 +367,15 @@ efi_status_t efi_main(efi_handle_t image, efi_system_table_t *sys_table)
static int efi_core_init(void)
{
- struct device_d *dev = device_alloc("efi-cs", DEVICE_ID_SINGLE);
+ struct device_d *dev;
+ int ret;
+
+ dev = device_alloc("efi-cs", DEVICE_ID_SINGLE);
+ ret = platform_device_register(dev);
+ if (ret)
+ return ret;
+ dev = device_alloc("efi-wdt", DEVICE_ID_SINGLE);
return platform_device_register(dev);
}
core_initcall(efi_core_init);
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 02cc0feb61..2793ee93d9 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -22,6 +22,12 @@ config WATCHDOG_AR9344
help
Add support for watchdog on the QCA AR9344 SoC.
+config WATCHDOG_EFI
+ bool "Generic EFI Watchdog Driver"
+ depends on EFI_BOOTUP
+ help
+ Add support for the EFI watchdog.
+
config WATCHDOG_DAVINCI
bool "TI Davinci"
depends on ARCH_DAVINCI
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index faf06110a3..69189ba1f3 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -1,5 +1,6 @@
obj-$(CONFIG_WATCHDOG) += wd_core.o
obj-$(CONFIG_WATCHDOG_AR9344) += ar9344_wdt.o
+obj-$(CONFIG_WATCHDOG_EFI) += efi_wdt.o
obj-$(CONFIG_WATCHDOG_DAVINCI) += davinci_wdt.o
obj-$(CONFIG_WATCHDOG_OMAP) += omap_wdt.o
obj-$(CONFIG_WATCHDOG_MXS28) += im28wd.o
diff --git a/drivers/watchdog/efi_wdt.c b/drivers/watchdog/efi_wdt.c
new file mode 100644
index 0000000000..8e3e51b7a9
--- /dev/null
+++ b/drivers/watchdog/efi_wdt.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2019 Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>, Pengutronix
+ */
+
+#include <common.h>
+#include <init.h>
+#include <driver.h>
+#include <efi.h>
+#include <efi/efi.h>
+#include <watchdog.h>
+
+struct efi_wdt_priv {
+ struct watchdog wd;
+ struct device_d *dev;
+};
+
+#define to_efi_wdt(h) container_of(h, struct efi_wdt_priv, wd)
+
+static int efi_wdt_set_timeout(struct watchdog *wd, unsigned timeout)
+{
+ struct efi_wdt_priv *priv = to_efi_wdt(wd);
+ efi_status_t efiret;
+
+ efiret = BS->set_watchdog_timer(timeout, 0, 0, NULL);
+ if (EFI_ERROR(efiret)) {
+ dev_err(priv->dev, "filed to set EFI watchdog: %lx\n", efiret);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int efi_wdt_probe(struct device_d *dev)
+{
+ struct efi_wdt_priv *priv;
+ int ret;
+
+ priv = xzalloc(sizeof(*priv));
+
+ priv->wd.set_timeout = efi_wdt_set_timeout;
+ priv->wd.hwdev = dev;
+ priv->dev = dev;
+
+ dev->priv = priv;
+
+ priv->wd.timeout_max = U32_MAX;
+
+ ret = watchdog_register(&priv->wd);
+ if (ret)
+ goto on_error;
+
+ return 0;
+
+on_error:
+ free(priv);
+ return ret;
+}
+
+static struct driver_d efi_wdt_driver = {
+ .name = "efi-wdt",
+ .probe = efi_wdt_probe,
+};
+device_platform_driver(efi_wdt_driver);
--
2.20.1
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