1 files changed, 68 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/wdog.c b/arch/arm/plat-mxc/wdog.c
new file mode 100644
index 000000000000..8f242e707f58
--- /dev/null
+++ b/arch/arm/plat-mxc/wdog.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/*!
+ * @file plat-mxc/wdog.c
+ * @brief This file contains watchdog timer implementations.
+ *
+ * This file contains watchdog timer implementations for timer tick.
+ *
+ * @ingroup WDOG
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <mach/hardware.h>
+
+#define WDOG_WT                 0x8	/* WDOG WT starting bit inside WCR */
+#define WCR_WOE_BIT             (1 << 6)
+#define WCR_WDA_BIT             (1 << 5)
+#define WCR_SRS_BIT             (1 << 4)
+#define WCR_WRE_BIT             (1 << 3)
+#define WCR_WDE_BIT             (1 << 2)
+#define WCR_WDBG_BIT            (1 << 1)
+#define WCR_WDZST_BIT           (1 << 0)
+
+/*
+ * WatchDog
+ */
+#define WDOG_WCR	0	/* 16bit watchdog control reg */
+#define WDOG_WSR	2	/* 16bit watchdog service reg */
+#define WDOG_WRSR	4	/* 16bit watchdog reset status reg */
+
+/*!
+ * The base addresses for the WDOG modules
+ */
+static void __iomem *wdog_base[2] = {
+	IO_ADDRESS(WDOG1_BASE_ADDR),
+#ifdef WDOG2_BASE_ADDR
+	IO_ADDRESS(WDOG2_BASE_ADDR),
+#endif
+};
+
+void mxc_wd_reset(void)
+{
+	u16 reg;
+	struct clk *clk;
+
+	clk = clk_get(NULL, "wdog_clk");
+	clk_enable(clk);
+
+	reg = __raw_readw(wdog_base[0] + WDOG_WCR) & ~WCR_SRS_BIT;
+	reg |= WCR_WDE_BIT;
+	__raw_writew(reg, wdog_base[0] + WDOG_WCR);
+}