[gemini] disable the watchdog if the bootloader left it enabled

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15920 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/gemini/patches/004-gemini-disable-watchdog-in-probe.patch b/target/linux/gemini/patches/004-gemini-disable-watchdog-in-probe.patch
new file mode 100644 (file)
index 0000000..d1f5c34
--- /dev/null
+++ b/target/linux/gemini/patches/004-gemini-disable-watchdog-in-probe.patch
@@ -0,0 +1,24 @@
+--- a/drivers/watchdog/gemini_wdt.c
++++ b/drivers/watchdog/gemini_wdt.c
+@@ -224,6 +224,7 @@ static int __init gemini_wdt_probe(struc
+       struct resource *res;
+       void __iomem *base;
+       struct gemini_wdt_struct *gemini_wdt;
++      unsigned int reg;
+ 
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!res) {
+@@ -267,6 +268,13 @@ static int __init gemini_wdt_probe(struc
+ 
+       gemini_wdt_miscdev.parent = &pdev->dev;
+ 
++      reg = __raw_readw(gemini_wdt->base + GEMINI_WDCR);
++      if (reg & WDCR_ENABLE) {
++              /* Watchdog was enabled by the bootloader, disable it. */
++              reg &= ~(WDCR_ENABLE);
++              __raw_writel(reg, gemini_wdt->base + GEMINI_WDCR);
++      }
++
+       ret = misc_register(&gemini_wdt_miscdev);
+       if (ret)
+               goto fail2;