[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>

6 files changed, 177 insertions, 3 deletions

diff --git a/arch/mips/configs/jmr3927_defconfig b/arch/mips/configs/jmr3927_defconfig
index eb96791c33ea..4ace37838993 100644
--- a/arch/mips/configs/jmr3927_defconfig
+++ b/arch/mips/configs/jmr3927_defconfig
@@ -464,7 +464,6 @@ CONFIG_SERIAL_TXX9_STDSERIAL=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_IPMI_HANDLER is not set
-# CONFIG_WATCHDOG is not set
 # CONFIG_HW_RANDOM is not set
 # CONFIG_RTC is not set
 # CONFIG_R3964 is not set
@@ -482,6 +481,20 @@ CONFIG_DEVPORT=y
 # CONFIG_W1 is not set
 # CONFIG_POWER_SUPPLY is not set
 # CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+# CONFIG_WATCHDOG_NOWAYOUT is not set
+
+#
+# Watchdog Device Drivers
+#
+# CONFIG_SOFT_WATCHDOG is not set
+CONFIG_TXX9_WDT=y
+
+#
+# PCI-based Watchdog Cards
+#
+# CONFIG_PCIPCWATCHDOG is not set
+# CONFIG_WDTPCI is not set
 
 #
 # Multifunction device drivers
diff --git a/arch/mips/configs/rbhma4200_defconfig b/arch/mips/configs/rbhma4200_defconfig
index 9383a598094b..a67c698a82d9 100644
--- a/arch/mips/configs/rbhma4200_defconfig
+++ b/arch/mips/configs/rbhma4200_defconfig
@@ -431,7 +431,6 @@ CONFIG_UNIX98_PTYS=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_IPMI_HANDLER is not set
-# CONFIG_WATCHDOG is not set
 # CONFIG_HW_RANDOM is not set
 # CONFIG_RTC is not set
 # CONFIG_R3964 is not set
@@ -449,6 +448,20 @@ CONFIG_DEVPORT=y
 # CONFIG_W1 is not set
 # CONFIG_POWER_SUPPLY is not set
 # CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+# CONFIG_WATCHDOG_NOWAYOUT is not set
+
+#
+# Watchdog Device Drivers
+#
+# CONFIG_SOFT_WATCHDOG is not set
+CONFIG_TXX9_WDT=m
+
+#
+# PCI-based Watchdog Cards
+#
+# CONFIG_PCIPCWATCHDOG is not set
+# CONFIG_WDTPCI is not set
 
 #
 # Multifunction device drivers
diff --git a/arch/mips/configs/rbhma4500_defconfig b/arch/mips/configs/rbhma4500_defconfig
index d1b56cc0fd7c..ebc8ad4c6439 100644
--- a/arch/mips/configs/rbhma4500_defconfig
+++ b/arch/mips/configs/rbhma4500_defconfig
@@ -450,7 +450,6 @@ CONFIG_UNIX98_PTYS=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_IPMI_HANDLER is not set
-# CONFIG_WATCHDOG is not set
 # CONFIG_HW_RANDOM is not set
 # CONFIG_RTC is not set
 # CONFIG_R3964 is not set
@@ -479,6 +478,20 @@ CONFIG_SPI_AT25=y
 # CONFIG_W1 is not set
 # CONFIG_POWER_SUPPLY is not set
 # CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+# CONFIG_WATCHDOG_NOWAYOUT is not set
+
+#
+# Watchdog Device Drivers
+#
+# CONFIG_SOFT_WATCHDOG is not set
+CONFIG_TXX9_WDT=m
+
+#
+# PCI-based Watchdog Cards
+#
+# CONFIG_PCIPCWATCHDOG is not set
+# CONFIG_WDTPCI is not set
 
 #
 # Multifunction device drivers
diff --git a/arch/mips/jmr3927/rbhma3100/setup.c b/arch/mips/jmr3927/rbhma3100/setup.c
index 75cfe6559005..c886d804d303 100644
--- a/arch/mips/jmr3927/rbhma3100/setup.c
+++ b/arch/mips/jmr3927/rbhma3100/setup.c
@@ -35,6 +35,7 @@
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/platform_device.h>
+#include <linux/clk.h>
 #ifdef CONFIG_SERIAL_TXX9
 #include <linux/serial_core.h>
 #endif
@@ -233,6 +234,8 @@ static void __init tx3927_setup(void)
         tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_BEOW;
         /* Disable PCI snoop */
         tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_PSNP;
+        /* do reset on watchdog */
+        tx3927_ccfgptr->ccfg |= TX3927_CCFG_WR;
 
 #ifdef DO_WRITE_THROUGH
         /* Enable PCI SNOOP - with write through only */
@@ -383,3 +386,55 @@ static int __init jmr3927_rtc_init(void)
         return IS_ERR(dev) ? PTR_ERR(dev) : 0;
 }
 device_initcall(jmr3927_rtc_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 jmr3927_wdt_init(void)
+{
+        return txx9_wdt_init(TX3927_TMR_REG(2));
+}
+device_initcall(jmr3927_wdt_init);
+
+/* Minimum CLK support */
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+        if (!strcmp(id, "imbus_clk"))
+                return (struct clk *)JMR3927_IMCLK;
+        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);
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);
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);