[U-Boot] [PATCH] cmd: wdt: Add "wdt disable" command

[Lukasz Majewski]

Add support for "wdt disable" command necessary for disabling the watchdog
timer.

Signed-off-by: Lukasz Majewski <lukma at denx.de>
---
 cmd/Kconfig        |  6 ++++++
 cmd/Makefile       |  2 ++
 cmd/wdt.c          | 32 ++++++++++++++++++++++++++++++++
 include/watchdog.h |  2 ++
 4 files changed, 42 insertions(+)
 create mode 100644 cmd/wdt.c

diff --git a/cmd/Kconfig b/cmd/Kconfig
index e339d86..293e0bb 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -426,6 +426,12 @@ config CMD_REMOTEPROC
 	help
 	  Support for Remote Processor control
 
+config CMD_WDT
+	bool "wdt"
+	default n
+	help
+	  Enables the "wdt" command, which is used to control a watchdog timer.
+
 config CMD_GPIO
 	bool "gpio"
 	help
diff --git a/cmd/Makefile b/cmd/Makefile
index 9c9a9d1..4934427 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -157,6 +157,8 @@ obj-$(CONFIG_CMD_ETHSW) += ethsw.o
 # Power
 obj-$(CONFIG_CMD_PMIC) += pmic.o
 obj-$(CONFIG_CMD_REGULATOR) += regulator.o
+
+obj-$(CONFIG_CMD_WDT) += wdt.o
 endif # !CONFIG_SPL_BUILD
 
 obj-$(CONFIG_CMD_BLOB) += blob.o
diff --git a/cmd/wdt.c b/cmd/wdt.c
new file mode 100644
index 0000000..aeaa9c2
--- /dev/null
+++ b/cmd/wdt.c
@@ -0,0 +1,32 @@
+/*
+ * wdt.c -- Watchdog support command
+ *
+ * Copyright (C) 2017
+ * Lukasz Majewski, DENX Software Engineering, lukma at denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <watchdog.h>
+
+static int do_wdt(cmd_tbl_t *cmdtp, int flag, int argc,
+			  char * const argv[])
+{
+	int ret = CMD_RET_SUCCESS;
+
+	if (argc < 2 || argc > 2)
+		return CMD_RET_USAGE;
+
+	if (!strcmp(argv[1], "disable")) {
+		WATCHDOG_DISABLE();
+		printf("WDT disabled\n");
+	}
+
+	return ret;
+}
+
+U_BOOT_CMD(wdt, CONFIG_SYS_MAXARGS, 1, do_wdt,
+	"Watchdog (wdt)",
+	"disable - disable watchdog\n"
+);
diff --git a/include/watchdog.h b/include/watchdog.h
index 174c894..b0716c5 100644
--- a/include/watchdog.h
+++ b/include/watchdog.h
@@ -41,8 +41,10 @@ int init_func_watchdog_reset(void);
 		#define WATCHDOG_RESET bl hw_watchdog_reset
 	#else
 		extern void hw_watchdog_reset(void);
+		void hw_watchdog_disable(void);
 
 		#define WATCHDOG_RESET hw_watchdog_reset
+		#define WATCHDOG_DISABLE hw_watchdog_disable
 	#endif /* __ASSEMBLY__ */
 #else
 	/*
-- 
2.1.4