OMAP2+: wd_timer: separate watchdog disable code from the rest of mach-omap2/devices.c

Split the wd_timer disable code out into its own file,
mach-omap2/wd_timer.c; it belongs in its own file rather than
cluttering up devices.c.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Charulatha Varadarajan <charu@ti.com>

1 files changed, 5 insertions, 50 deletions

diff --git a/arch/arm/mach-omap2/devices.c b/arch/arm/mach-omap2/devices.c
index 1bca147ac91d..9221a486b51f 100644
--- a/arch/arm/mach-omap2/devices.c
+++ b/arch/arm/mach-omap2/devices.c
@@ -33,6 +33,7 @@
 
 #include "mux.h"
 #include "control.h"
+#include "wd_timer.h"
 
 #if defined(CONFIG_VIDEO_OMAP2) || defined(CONFIG_VIDEO_OMAP2_MODULE)
 
@@ -955,69 +956,23 @@ static inline void omap_init_vout(void) {}
 
 /*-------------------------------------------------------------------------*/
 
-/*
- * Inorder to avoid any assumptions from bootloader regarding WDT
- * settings, WDT module is reset during init. This enables the watchdog
- * timer. Hence it is required to disable the watchdog after the WDT reset
- * during init. Otherwise the system would reboot as per the default
- * watchdog timer registers settings.
- */
-#define OMAP_WDT_WPS	(0x34)
-#define OMAP_WDT_SPR	(0x48)
-
 static int omap2_disable_wdt(struct omap_hwmod *oh, void *unused)
 {
-	void __iomem *base;
-	int ret;
-
-	if (!oh) {
-		pr_err("%s: Could not look up wdtimer_hwmod\n", __func__);
-		return -EINVAL;
-	}
-
-	base = omap_hwmod_get_mpu_rt_va(oh);
-	if (!base) {
-		pr_err("%s: Could not get the base address for %s\n",
-				oh->name, __func__);
-		return -EINVAL;
-	}
-
-	/* Enable the clocks before accessing the WDT registers */
-	ret = omap_hwmod_enable(oh);
-	if (ret) {
-		pr_err("%s: Could not enable clocks for %s\n",
-				oh->name, __func__);
-		return ret;
-	}
-
-	/* sequence required to disable watchdog */
-	__raw_writel(0xAAAA, base + OMAP_WDT_SPR);
-	while (__raw_readl(base + OMAP_WDT_WPS) & 0x10)
-		cpu_relax();
-
-	__raw_writel(0x5555, base + OMAP_WDT_SPR);
-	while (__raw_readl(base + OMAP_WDT_WPS) & 0x10)
-		cpu_relax();
-
-	ret = omap_hwmod_idle(oh);
-	if (ret)
-		pr_err("%s: Could not disable clocks for %s\n",
-				oh->name, __func__);
-
-	return ret;
+	return omap2_wd_timer_disable(oh);
 }
 
 static void __init omap_disable_wdt(void)
 {
 	if (cpu_class_is_omap2())
 		omap_hwmod_for_each_by_class("wd_timer",
-						omap2_disable_wdt, NULL);
+					     omap2_disable_wdt, NULL);
 	return;
 }
 
 static int __init omap2_init_devices(void)
 {
-	/* please keep these calls, and their implementations above,
+	/*
+	 * please keep these calls, and their implementations above,
 	 * in alphabetical order so they're easier to sort through.
 	 */
 	omap_disable_wdt();