[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, 25 insertions, 0 deletions

diff --git a/arch/mips/tx4938/toshiba_rbtx4938/setup.c b/arch/mips/tx4938/toshiba_rbtx4938/setup.c
index 2333d9ff879d..61249f049cd6 100644
--- a/arch/mips/tx4938/toshiba_rbtx4938/setup.c
+++ b/arch/mips/tx4938/toshiba_rbtx4938/setup.c
@@ -724,6 +724,8 @@ void __init tx4938_board_setup(void)
 	/* CCFG */
 	/* clear WatchDogReset,BusErrorOnWrite flag (W1C) */
 	tx4938_ccfgptr->ccfg |= TX4938_CCFG_WDRST | TX4938_CCFG_BEOW;
+	/* do reset on watchdog */
+	tx4938_ccfgptr->ccfg |= TX4938_CCFG_WR;
 	/* clear PCIC1 reset */
 	if (tx4938_ccfgptr->clkctr & TX4938_CLKCTR_PCIC1RST)
 		tx4938_ccfgptr->clkctr &= ~TX4938_CLKCTR_PCIC1RST;
@@ -1121,12 +1123,35 @@ static int __init rbtx4938_spi_init(void)
 }
 arch_initcall(rbtx4938_spi_init);
 
+/* Watchdog support */
+
+static int __init txx9_wdt_init(unsigned long base)
+{
+	struct resource res = {
+		.start	= base,
+		.end	= base + 0x100 - 1,
+		.flags	= IORESOURCE_MEM,
+		.parent	= &tx4938_reg_resource,
+	};
+	struct platform_device *dev =
+		platform_device_register_simple("txx9wdt", -1, &res, 1);
+	return IS_ERR(dev) ? PTR_ERR(dev) : 0;
+}
+
+static int __init rbtx4938_wdt_init(void)
+{
+	return txx9_wdt_init(TX4938_TMR_REG(2) & 0xfffffffffULL);
+}
+device_initcall(rbtx4938_wdt_init);
+
 /* Minimum CLK support */
 
 struct clk *clk_get(struct device *dev, const char *id)
 {
 	if (!strcmp(id, "spi-baseclk"))
 		return (struct clk *)(txx9_gbus_clock / 2 / 4);
+	if (!strcmp(id, "imbus_clk"))
+		return (struct clk *)(txx9_gbus_clock / 2);
 	return ERR_PTR(-ENOENT);
 }
 EXPORT_SYMBOL(clk_get);