[COMMON] watchdog: s3c2410_wdt: Add watchdog confirm function.

This function shows the registers associated with the state of the current watchdog.
However, this function does not return, so it must be used only for testing purposes.

Change-Id: Ic666bce8e31c563a7b445f923017990faed92595
Signed-off-by: Choi Jaehyoung <jkkkkk.choi@samsung.com>

diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
index 5821234c862bb0ac40e0cc3b05b2aa7d18fea452..d204a651078d002a6c63901199aacff7c0a40530 100644 (file)
--- a/drivers/watchdog/s3c2410_wdt.c
+++ b/drivers/watchdog/s3c2410_wdt.c
@@ -658,6 +658,55 @@ inline int s3c2410wdt_set_emergency_reset(unsigned int timeout_cnt, int index)
 
        return 0;
 }
+
+inline void s3c2410wdt_reset_confirm(unsigned long mtime, int index)
+{
+       struct s3c2410_wdt *wdt = s3c_wdt[index];
+       unsigned int wtcon, wtdat, wtcnt, disable_reg, mask_reset_reg;
+       unsigned long total_time = 0;
+       int ret;
+
+       if (!wdt)
+               return;
+
+       wtcon = readl(wdt->reg_base + S3C2410_WTCON);
+
+       dev_info(wdt->dev, "Current %s_cluster watchdog %sable, wtcon = %x\n",
+                       index ? "Big" : "Little",
+                       (wtcon & S3C2410_WTCON_ENABLE) ? "en" : "dis", wtcon);
+
+       ret = regmap_read(wdt->pmureg, wdt->drv_data->mask_reset_reg, &mask_reset_reg);
+       if (ret) {
+               dev_err(wdt->dev, "Couldn't get MASK_WDT_RESET register\n");
+               return;
+       }
+
+       ret = regmap_read(wdt->pmureg, wdt->drv_data->disable_reg, &disable_reg);
+       if (ret) {
+               dev_err(wdt->dev, "Couldn't get DISABLE_WDT register\n");
+               return;
+       }
+
+       /*  Fake watchdog bits in both registers must be cleared. */
+       dev_info(wdt->dev, "DISABLE_WDT reg:  %x, MASK_WDT_RESET reg: %x\n", disable_reg, mask_reset_reg);
+
+       /* If watchdog is disabled, do not print wtcnt value. */
+       if(!(wtcon & S3C2410_WTCON_ENABLE))
+               return;
+
+       do {
+               /* It continues to print the wtcnt and wddat values
+                * until watchdog reset is taken. */
+               wtdat = readl(wdt->reg_base + S3C2410_WTDAT);
+               wtcnt = readl(wdt->reg_base + S3C2410_WTCNT);
+               dev_info(wdt->dev, "%lu milliseconds, wtdat = %u, wtcnt = %u",
+                               total_time, wtdat, wtcnt);
+               total_time += mtime;
+               mdelay(mtime);
+       } while(1);
+
+       /* This function does not return. */
+}
 #endif
 
 #ifdef CONFIG_PM_SLEEP