[MIPS] TXx9 watchdog support for rbhma3100,rbhma4200,rbhma4500

This patch adds support for txx9wdt driver to rbhma3100, rbhma4200 and
rbhma4500 platform.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 55 insertions, 0 deletions

diff --git a/arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_setup.c b/arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_setup.c
index c29a5283237b..e466e5e711d8 100644
--- a/arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_setup.c
+++ b/arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_setup.c
@@ -50,6 +50,7 @@
 #include <linux/pci.h>
 #include <linux/pm.h>
 #include <linux/platform_device.h>
+#include <linux/clk.h>
 
 #include <asm/bootinfo.h>
 #include <asm/io.h>
@@ -803,6 +804,8 @@ void __init plat_mem_setup(void)
                 }
 
         /* CCFG */
+        /* do reset on watchdog */
+        tx4927_ccfgptr->ccfg |= TX4927_CCFG_WR;
         /* enable Timeout BusError */
         if (tx4927_ccfg_toeon)
                 tx4927_ccfgptr->ccfg |= TX4927_CCFG_TOE;
@@ -944,3 +947,55 @@ static int __init rbtx4927_ne_init(void)
         return IS_ERR(dev) ? PTR_ERR(dev) : 0;
 }
 device_initcall(rbtx4927_ne_init);
+
+/* Watchdog support */
+
+static int __init txx9_wdt_init(unsigned long base)
+{
+        struct resource res = {
+                .start  = base,
+                .end    = base + 0x100 - 1,
+                .flags  = IORESOURCE_MEM,
+        };
+        struct platform_device *dev =
+                platform_device_register_simple("txx9wdt", -1, &res, 1);
+        return IS_ERR(dev) ? PTR_ERR(dev) : 0;
+}
+
+static int __init rbtx4927_wdt_init(void)
+{
+        return txx9_wdt_init(TX4927_TMR_REG(2) & 0xfffffffffULL);
+}
+device_initcall(rbtx4927_wdt_init);
+
+/* Minimum CLK support */
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+        if (!strcmp(id, "imbus_clk"))
+                return (struct clk *)50000000;
+        return ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL(clk_get);
+
+int clk_enable(struct clk *clk)
+{
+        return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+        return (unsigned long)clk;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+void clk_put(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_put);