[U-Boot] [PATCH v3 1/2] watchdog: tangier: Replace unused constant with a comment

[Andy Shevchenko]

The default timeout value had been left in order to leave some traces
about default setup of watchdog done by firmware.

For better understanding and compiler burden, replace it with a comment.

Suggested-by: Stefan Roese <sr at denx.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
---
 drivers/watchdog/tangier_wdt.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/watchdog/tangier_wdt.c b/drivers/watchdog/tangier_wdt.c
index be4a8f467a..b2f40ef057 100644
--- a/drivers/watchdog/tangier_wdt.c
+++ b/drivers/watchdog/tangier_wdt.c
@@ -10,7 +10,12 @@
 #define WDT_PRETIMEOUT		15
 #define WDT_TIMEOUT_MIN		(1 + WDT_PRETIMEOUT)
 #define WDT_TIMEOUT_MAX		170
-#define WDT_DEFAULT_TIMEOUT	90
+
+/*
+ * Note, firmware chooses 90 seconds as a default timeout for watchdog on
+ * Intel Tangier SoC. It means that without handling it in the running code
+ * the reboot will happen.
+ */
 
 #ifndef CONFIG_WATCHDOG_TIMEOUT_MSECS
 #define WATCHDOG_HEARTBEAT 60000
-- 
2.20.1