[WATCHDOG] at32ap700x_wdt.c - timeout module parameter patch

integrate the timeout/heartbeat as a module parameter and not as
a CONFIG_* value.

Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 13 insertions, 5 deletions

diff --git a/drivers/char/watchdog/at32ap700x_wdt.c b/drivers/char/watchdog/at32ap700x_wdt.c
index 8abe1c77ac1..6e7c9588b1b 100644
--- a/drivers/char/watchdog/at32ap700x_wdt.c
+++ b/drivers/char/watchdog/at32ap700x_wdt.c
@@ -20,8 +20,15 @@
 #include <linux/io.h>
 
 #define TIMEOUT_MIN             1
-#define TIMEOUT_DEFAULT         CONFIG_AT32AP700X_WDT_TIMEOUT
 #define TIMEOUT_MAX             2
+#define TIMEOUT_DEFAULT         TIMEOUT_MAX
+
+/* module parameters */
+static int timeout =  TIMEOUT_DEFAULT;
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout,
+                "Timeout value. Limited to be 1 or 2 seconds. (default="
+                __MODULE_STRING(TIMEOUT_DEFAULT) ")");
 
 /* Watchdog registers and write/read macro */
 #define WDT_CTRL                0x00
@@ -233,11 +240,11 @@ static int __init at32_wdt_probe(struct platform_device *pdev)
         wdt->miscdev.name = "watchdog";
         wdt->miscdev.fops = &at32_wdt_fops;
 
-        if (at32_wdt_settimeout(TIMEOUT_DEFAULT)) {
-                at32_wdt_settimeout(TIMEOUT_MAX);
+        if (at32_wdt_settimeout(timeout)) {
+                at32_wdt_settimeout(TIMEOUT_DEFAULT);
                 dev_dbg(&pdev->dev,
                         "default timeout invalid, set to %d sec.\n",
-                        TIMEOUT_MAX);
+                        TIMEOUT_DEFAULT);
         }
 
         ret = misc_register(&wdt->miscdev);
@@ -248,7 +255,8 @@ static int __init at32_wdt_probe(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, wdt);
         wdt->miscdev.parent = &pdev->dev;
-        dev_info(&pdev->dev, "AT32AP700X WDT at 0x%p\n", wdt->regs);
+        dev_info(&pdev->dev, "AT32AP700X WDT at 0x%p, timeout %d sec\n",
+                wdt->regs, wdt->timeout);
 
         return 0;