16 files changed, 416 insertions, 392 deletions

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index edebaf771f50..a18bf6358eb8 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -129,17 +129,6 @@ config 977_WATCHDOG
 
           Not sure? It's safe to say N.
 
-config IXP2000_WATCHDOG
-        tristate "IXP2000 Watchdog"
-        depends on ARCH_IXP2000
-        help
-          Say Y here if to include support for the watchdog timer
-          in the Intel IXP2000(2400, 2800, 2850) network processors.
-          This driver can be built as a module by choosing M. The module
-          will be called ixp2000_wdt.
-
-          Say N if you are unsure.
-
 config IXP4XX_WATCHDOG
         tristate "IXP4xx Watchdog"
         depends on ARCH_IXP4XX
@@ -543,7 +532,7 @@ config WAFER_WDT
 
 config I6300ESB_WDT
         tristate "Intel 6300ESB Timer/Watchdog"
-        depends on X86 && PCI
+        depends on PCI
         ---help---
           Hardware driver for the watchdog timer built into the Intel
           6300ESB controller hub.
@@ -551,6 +540,19 @@ config I6300ESB_WDT
           To compile this driver as a module, choose M here: the
           module will be called i6300esb.
 
+config IE6XX_WDT
+        tristate "Intel Atom E6xx Watchdog"
+        depends on X86 && PCI
+        select WATCHDOG_CORE
+        select MFD_CORE
+        select LPC_SCH
+        ---help---
+          Hardware driver for the watchdog timer built into the Intel
+          Atom E6XX (TunnelCreek) processor.
+
+          To compile this driver as a module, choose M here: the
+          module will be called ie6xx_wdt.
+
 config INTEL_SCU_WATCHDOG
         bool "Intel SCU Watchdog for Mobile Platforms"
         depends on X86_MRST
@@ -607,7 +609,12 @@ config IT87_WDT
         depends on X86 && EXPERIMENTAL
         ---help---
           This is the driver for the hardware watchdog on the ITE IT8702,
-          IT8712, IT8716, IT8718, IT8720, IT8721, IT8726 Super I/O chips.
+          IT8712, IT8716, IT8718, IT8720, IT8721, IT8726 and IT8728
+          Super I/O chips.
+
+          If the driver does not work, then make sure that the game port in
+          the BIOS is enabled.
+
           This watchdog simply watches your kernel to make sure it doesn't
           freeze, and if it does, it reboots your computer after a certain
           amount of time.
@@ -780,7 +787,7 @@ config SMSC37B787_WDT
 
 config VIA_WDT
         tristate "VIA Watchdog Timer"
-        depends on X86
+        depends on X86 && PCI
         select WATCHDOG_CORE
         ---help---
         This is the driver for the hardware watchdog timer on VIA
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index e8f479a16402..442bfbe0882a 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -36,7 +36,6 @@ obj-$(CONFIG_OMAP_WATCHDOG) += omap_wdt.o
 obj-$(CONFIG_TWL4030_WATCHDOG) += twl4030_wdt.o
 obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
 obj-$(CONFIG_977_WATCHDOG) += wdt977.o
-obj-$(CONFIG_IXP2000_WATCHDOG) += ixp2000_wdt.o
 obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
 obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o
 obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o
@@ -81,6 +80,7 @@ obj-$(CONFIG_IB700_WDT) += ib700wdt.o
 obj-$(CONFIG_IBMASR) += ibmasr.o
 obj-$(CONFIG_WAFER_WDT) += wafer5823wdt.o
 obj-$(CONFIG_I6300ESB_WDT) += i6300esb.o
+obj-$(CONFIG_IE6XX_WDT) += ie6xx_wdt.o
 obj-$(CONFIG_ITCO_WDT) += iTCO_wdt.o
 ifeq ($(CONFIG_ITCO_VENDOR_SUPPORT),y)
 obj-$(CONFIG_ITCO_WDT) += iTCO_vendor_support.o
diff --git a/drivers/watchdog/ar7_wdt.c b/drivers/watchdog/ar7_wdt.c
index 639ae9a23fbc..dc30dbd21cf1 100644
--- a/drivers/watchdog/ar7_wdt.c
+++ b/drivers/watchdog/ar7_wdt.c
@@ -282,29 +282,19 @@ static int __devinit ar7_wdt_probe(struct platform_device *pdev)
                 platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
         if (!ar7_regs_wdt) {
                 pr_err("could not get registers resource\n");
-                rc = -ENODEV;
-                goto out;
-        }
-
-        if (!request_mem_region(ar7_regs_wdt->start,
-                                resource_size(ar7_regs_wdt), LONGNAME)) {
-                pr_warn("watchdog I/O region busy\n");
-                rc = -EBUSY;
-                goto out;
+                return -ENODEV;
         }
 
-        ar7_wdt = ioremap(ar7_regs_wdt->start, resource_size(ar7_regs_wdt));
+        ar7_wdt = devm_request_and_ioremap(&pdev->dev, ar7_regs_wdt);
         if (!ar7_wdt) {
                 pr_err("could not ioremap registers\n");
-                rc = -ENXIO;
-                goto out_mem_region;
+                return -ENXIO;
         }
 
         vbus_clk = clk_get(NULL, "vbus");
         if (IS_ERR(vbus_clk)) {
                 pr_err("could not get vbus clock\n");
-                rc = PTR_ERR(vbus_clk);
-                goto out_mem_region;
+                return PTR_ERR(vbus_clk);
         }
 
         ar7_wdt_disable_wdt();
@@ -314,24 +304,21 @@ static int __devinit ar7_wdt_probe(struct platform_device *pdev)
         rc = misc_register(&ar7_wdt_miscdev);
         if (rc) {
                 pr_err("unable to register misc device\n");
-                goto out_alloc;
+                goto out;
         }
-        goto out;
+        return 0;
 
-out_alloc:
-        iounmap(ar7_wdt);
-out_mem_region:
-        release_mem_region(ar7_regs_wdt->start, resource_size(ar7_regs_wdt));
 out:
+        clk_put(vbus_clk);
+        vbus_clk = NULL;
         return rc;
 }
 
 static int __devexit ar7_wdt_remove(struct platform_device *pdev)
 {
         misc_deregister(&ar7_wdt_miscdev);
-        iounmap(ar7_wdt);
-        release_mem_region(ar7_regs_wdt->start, resource_size(ar7_regs_wdt));
-
+        clk_put(vbus_clk);
+        vbus_clk = NULL;
         return 0;
 }
 
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index 23885f2d56a0..2b763815aeec 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -861,16 +861,6 @@ static struct pci_driver hpwdt_driver = {
         .remove = __devexit_p(hpwdt_exit),
 };
 
-static void __exit hpwdt_cleanup(void)
-{
-        pci_unregister_driver(&hpwdt_driver);
-}
-
-static int __init hpwdt_init(void)
-{
-        return pci_register_driver(&hpwdt_driver);
-}
-
 MODULE_AUTHOR("Tom Mingarelli");
 MODULE_DESCRIPTION("hp watchdog driver");
 MODULE_LICENSE("GPL");
@@ -889,5 +879,4 @@ module_param(allow_kdump, int, 0);
 MODULE_PARM_DESC(allow_kdump, "Start a kernel dump after NMI occurs");
 #endif /* !CONFIG_HPWDT_NMI_DECODING */
 
-module_init(hpwdt_init);
-module_exit(hpwdt_cleanup);
+module_pci_driver(hpwdt_driver);
diff --git a/drivers/watchdog/i6300esb.c b/drivers/watchdog/i6300esb.c
index 738032a36bcf..276877d5b6a3 100644
--- a/drivers/watchdog/i6300esb.c
+++ b/drivers/watchdog/i6300esb.c
@@ -492,19 +492,7 @@ static struct pci_driver esb_driver = {
         .shutdown       = esb_shutdown,
 };
 
-static int __init watchdog_init(void)
-{
-        return pci_register_driver(&esb_driver);
-}
-
-static void __exit watchdog_cleanup(void)
-{
-        pci_unregister_driver(&esb_driver);
-        pr_info("Watchdog Module Unloaded\n");
-}
-
-module_init(watchdog_init);
-module_exit(watchdog_cleanup);
+module_pci_driver(esb_driver);
 
 MODULE_AUTHOR("Ross Biro and David Härdeman");
 MODULE_DESCRIPTION("Watchdog driver for Intel 6300ESB chipsets");
diff --git a/drivers/watchdog/ie6xx_wdt.c b/drivers/watchdog/ie6xx_wdt.c
new file mode 100644
index 000000000000..5f0d776f902c
--- /dev/null
+++ b/drivers/watchdog/ie6xx_wdt.c
@@ -0,0 +1,348 @@
+/*
+ *      Intel Atom E6xx Watchdog driver
+ *
+ *      Copyright (C) 2011 Alexander Stein
+ *                <alexander.stein@systec-electronic.com>
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of version 2 of the GNU General
+ *      Public License as published by the Free Software Foundation.
+ *
+ *      This program is distributed in the hope that it will be
+ *      useful, but WITHOUT ANY WARRANTY; without even the implied
+ *      warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *      PURPOSE.  See the GNU General Public License for more details.
+ *      You should have received a copy of the GNU General Public
+ *      License along with this program; if not, write to the Free
+ *      Software Foundation, Inc., 59 Temple Place - Suite 330,
+ *      Boston, MA  02111-1307, USA.
+ *      The full GNU General Public License is included in this
+ *      distribution in the file called COPYING.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+#include <linux/miscdevice.h>
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
+#include <linux/uaccess.h>
+#include <linux/spinlock.h>
+
+#define DRIVER_NAME "ie6xx_wdt"
+
+#define PV1     0x00
+#define PV2     0x04
+
+#define RR0     0x0c
+#define RR1     0x0d
+#define WDT_RELOAD      0x01
+#define WDT_TOUT        0x02
+
+#define WDTCR   0x10
+#define WDT_PRE_SEL     0x04
+#define WDT_RESET_SEL   0x08
+#define WDT_RESET_EN    0x10
+#define WDT_TOUT_EN     0x20
+
+#define DCR     0x14
+
+#define WDTLR   0x18
+#define WDT_LOCK        0x01
+#define WDT_ENABLE      0x02
+#define WDT_TOUT_CNF    0x03
+
+#define MIN_TIME        1
+#define MAX_TIME        (10 * 60) /* 10 minutes */
+#define DEFAULT_TIME    60
+
+static unsigned int timeout = DEFAULT_TIME;
+module_param(timeout, uint, 0);
+MODULE_PARM_DESC(timeout,
+                "Default Watchdog timer setting ("
+                __MODULE_STRING(DEFAULT_TIME) "s)."
+                "The range is from 1 to 600");
+
+static bool nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, bool, 0);
+MODULE_PARM_DESC(nowayout,
+        "Watchdog cannot be stopped once started (default="
+                __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+static u8 resetmode = 0x10;
+module_param(resetmode, byte, 0);
+MODULE_PARM_DESC(resetmode,
+        "Resetmode bits: 0x08 warm reset (cold reset otherwise), "
+        "0x10 reset enable, 0x20 disable toggle GPIO[4] (default=0x10)");
+
+static struct {
+        unsigned short sch_wdtba;
+        struct spinlock unlock_sequence;
+#ifdef CONFIG_DEBUG_FS
+        struct dentry *debugfs;
+#endif
+} ie6xx_wdt_data;
+
+/*
+ * This is needed to write to preload and reload registers
+ * struct ie6xx_wdt_data.unlock_sequence must be used
+ * to prevent sequence interrupts
+ */
+static void ie6xx_wdt_unlock_registers(void)
+{
+        outb(0x80, ie6xx_wdt_data.sch_wdtba + RR0);
+        outb(0x86, ie6xx_wdt_data.sch_wdtba + RR0);
+}
+
+static int ie6xx_wdt_ping(struct watchdog_device *wdd)
+{
+        spin_lock(&ie6xx_wdt_data.unlock_sequence);
+        ie6xx_wdt_unlock_registers();
+        outb(WDT_RELOAD, ie6xx_wdt_data.sch_wdtba + RR1);
+        spin_unlock(&ie6xx_wdt_data.unlock_sequence);
+        return 0;
+}
+
+static int ie6xx_wdt_set_timeout(struct watchdog_device *wdd, unsigned int t)
+{
+        u32 preload;
+        u64 clock;
+        u8 wdtcr;
+
+        /* Watchdog clock is PCI Clock (33MHz) */
+        clock = 33000000;
+        /* and the preload value is loaded into [34:15] of the down counter */
+        preload = (t * clock) >> 15;
+        /*
+         * Manual states preload must be one less.
+         * Does not wrap as t is at least 1
+         */
+        preload -= 1;
+
+        spin_lock(&ie6xx_wdt_data.unlock_sequence);
+
+        /* Set ResetMode & Enable prescaler for range 10ms to 10 min */
+        wdtcr = resetmode & 0x38;
+        outb(wdtcr, ie6xx_wdt_data.sch_wdtba + WDTCR);
+
+        ie6xx_wdt_unlock_registers();
+        outl(0, ie6xx_wdt_data.sch_wdtba + PV1);
+
+        ie6xx_wdt_unlock_registers();
+        outl(preload, ie6xx_wdt_data.sch_wdtba + PV2);
+
+        ie6xx_wdt_unlock_registers();
+        outb(WDT_RELOAD | WDT_TOUT, ie6xx_wdt_data.sch_wdtba + RR1);
+
+        spin_unlock(&ie6xx_wdt_data.unlock_sequence);
+
+        wdd->timeout = t;
+        return 0;
+}
+
+static int ie6xx_wdt_start(struct watchdog_device *wdd)
+{
+        ie6xx_wdt_set_timeout(wdd, wdd->timeout);
+
+        /* Enable the watchdog timer */
+        spin_lock(&ie6xx_wdt_data.unlock_sequence);
+        outb(WDT_ENABLE, ie6xx_wdt_data.sch_wdtba + WDTLR);
+        spin_unlock(&ie6xx_wdt_data.unlock_sequence);
+
+        return 0;
+}
+
+static int ie6xx_wdt_stop(struct watchdog_device *wdd)
+{
+        if (inb(ie6xx_wdt_data.sch_wdtba + WDTLR) & WDT_LOCK)
+                return -1;
+
+        /* Disable the watchdog timer */
+        spin_lock(&ie6xx_wdt_data.unlock_sequence);
+        outb(0, ie6xx_wdt_data.sch_wdtba + WDTLR);
+        spin_unlock(&ie6xx_wdt_data.unlock_sequence);
+
+        return 0;
+}
+
+static const struct watchdog_info ie6xx_wdt_info = {
+        .identity =     "Intel Atom E6xx Watchdog",
+        .options =      WDIOF_SETTIMEOUT |
+                        WDIOF_MAGICCLOSE |
+                        WDIOF_KEEPALIVEPING,
+};
+
+static const struct watchdog_ops ie6xx_wdt_ops = {
+        .owner =        THIS_MODULE,
+        .start =        ie6xx_wdt_start,
+        .stop =         ie6xx_wdt_stop,
+        .ping =         ie6xx_wdt_ping,
+        .set_timeout =  ie6xx_wdt_set_timeout,
+};
+
+static struct watchdog_device ie6xx_wdt_dev = {
+        .info =         &ie6xx_wdt_info,
+        .ops =          &ie6xx_wdt_ops,
+        .min_timeout =  MIN_TIME,
+        .max_timeout =  MAX_TIME,
+};
+
+#ifdef CONFIG_DEBUG_FS
+
+static int ie6xx_wdt_dbg_show(struct seq_file *s, void *unused)
+{
+        seq_printf(s, "PV1   = 0x%08x\n",
+                inl(ie6xx_wdt_data.sch_wdtba + PV1));
+        seq_printf(s, "PV2   = 0x%08x\n",
+                inl(ie6xx_wdt_data.sch_wdtba + PV2));
+        seq_printf(s, "RR    = 0x%08x\n",
+                inw(ie6xx_wdt_data.sch_wdtba + RR0));
+        seq_printf(s, "WDTCR = 0x%08x\n",
+                inw(ie6xx_wdt_data.sch_wdtba + WDTCR));
+        seq_printf(s, "DCR   = 0x%08x\n",
+                inl(ie6xx_wdt_data.sch_wdtba + DCR));
+        seq_printf(s, "WDTLR = 0x%08x\n",
+                inw(ie6xx_wdt_data.sch_wdtba + WDTLR));
+
+        seq_printf(s, "\n");
+        return 0;
+}
+
+static int ie6xx_wdt_dbg_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, ie6xx_wdt_dbg_show, NULL);
+}
+
+static const struct file_operations ie6xx_wdt_dbg_operations = {
+        .open           = ie6xx_wdt_dbg_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static void __devinit ie6xx_wdt_debugfs_init(void)
+{
+        /* /sys/kernel/debug/ie6xx_wdt */
+        ie6xx_wdt_data.debugfs = debugfs_create_file("ie6xx_wdt",
+                S_IFREG | S_IRUGO, NULL, NULL, &ie6xx_wdt_dbg_operations);
+}
+
+static void __devexit ie6xx_wdt_debugfs_exit(void)
+{
+        debugfs_remove(ie6xx_wdt_data.debugfs);
+}
+
+#else
+static void __devinit ie6xx_wdt_debugfs_init(void)
+{
+}
+
+static void __devexit ie6xx_wdt_debugfs_exit(void)
+{
+}
+#endif
+
+static int __devinit ie6xx_wdt_probe(struct platform_device *pdev)
+{
+        struct resource *res;
+        u8 wdtlr;
+        int ret;
+
+        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+        if (!res)
+                return -ENODEV;
+
+        if (!request_region(res->start, resource_size(res), pdev->name)) {
+                dev_err(&pdev->dev, "Watchdog region 0x%llx already in use!\n",
+                        (u64)res->start);
+                return -EBUSY;
+        }
+
+        ie6xx_wdt_data.sch_wdtba = res->start;
+        dev_dbg(&pdev->dev, "WDT = 0x%X\n", ie6xx_wdt_data.sch_wdtba);
+
+        ie6xx_wdt_dev.timeout = timeout;
+        watchdog_set_nowayout(&ie6xx_wdt_dev, nowayout);
+
+        spin_lock_init(&ie6xx_wdt_data.unlock_sequence);
+
+        wdtlr = inb(ie6xx_wdt_data.sch_wdtba + WDTLR);
+        if (wdtlr & WDT_LOCK)
+                dev_warn(&pdev->dev,
+                        "Watchdog Timer is Locked (Reg=0x%x)\n", wdtlr);
+
+        ie6xx_wdt_debugfs_init();
+
+        ret = watchdog_register_device(&ie6xx_wdt_dev);
+        if (ret) {
+                dev_err(&pdev->dev,
+                        "Watchdog timer: cannot register device (err =%d)\n",
+                                                                        ret);
+                goto misc_register_error;
+        }
+
+        return 0;
+
+misc_register_error:
+        ie6xx_wdt_debugfs_exit();
+        release_region(res->start, resource_size(res));
+        ie6xx_wdt_data.sch_wdtba = 0;
+        return ret;
+}
+
+static int __devexit ie6xx_wdt_remove(struct platform_device *pdev)
+{
+        struct resource *res;
+
+        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+        ie6xx_wdt_stop(NULL);
+        watchdog_unregister_device(&ie6xx_wdt_dev);
+        ie6xx_wdt_debugfs_exit();
+        release_region(res->start, resource_size(res));
+        ie6xx_wdt_data.sch_wdtba = 0;
+
+        return 0;
+}
+
+static struct platform_driver ie6xx_wdt_driver = {
+        .probe          = ie6xx_wdt_probe,
+        .remove         = __devexit_p(ie6xx_wdt_remove),
+        .driver         = {
+                .name   = DRIVER_NAME,
+                .owner  = THIS_MODULE,
+        },
+};
+
+static int __init ie6xx_wdt_init(void)
+{
+        /* Check boot parameters to verify that their initial values */
+        /* are in range. */
+        if ((timeout < MIN_TIME) ||
+            (timeout > MAX_TIME)) {
+                pr_err("Watchdog timer: value of timeout %d (dec) "
+                  "is out of range from %d to %d (dec)\n",
+                  timeout, MIN_TIME, MAX_TIME);
+                return -EINVAL;
+        }
+
+        return platform_driver_register(&ie6xx_wdt_driver);
+}
+
+static void __exit ie6xx_wdt_exit(void)
+{
+        platform_driver_unregister(&ie6xx_wdt_driver);
+}
+
+late_initcall(ie6xx_wdt_init);
+module_exit(ie6xx_wdt_exit);
+
+MODULE_AUTHOR("Alexander Stein <alexander.stein@systec-electronic.com>");
+MODULE_DESCRIPTION("Intel Atom E6xx Watchdog Device Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/watchdog/it87_wdt.c b/drivers/watchdog/it87_wdt.c
index 8a741bcb5124..d3dcc6988b5f 100644
--- a/drivers/watchdog/it87_wdt.c
+++ b/drivers/watchdog/it87_wdt.c
@@ -12,7 +12,8 @@
  *                  http://www.ite.com.tw/
  *
  *      Support of the watchdog timers, which are available on
- *      IT8702, IT8712, IT8716, IT8718, IT8720, IT8721 and IT8726.
+ *      IT8702, IT8712, IT8716, IT8718, IT8720, IT8721, IT8726
+ *      and IT8728.
  *
  *      This program is free software; you can redistribute it and/or
  *      modify it under the terms of the GNU General Public License
@@ -84,6 +85,7 @@
 #define IT8720_ID       0x8720
 #define IT8721_ID       0x8721
 #define IT8726_ID       0x8726  /* the data sheet suggest wrongly 0x8716 */
+#define IT8728_ID       0x8728
 
 /* GPIO Configuration Registers LDN=0x07 */
 #define WDTCTRL         0x71
@@ -95,7 +97,7 @@
 #define WDT_CIRINT      0x80
 #define WDT_MOUSEINT    0x40
 #define WDT_KYBINT      0x20
-#define WDT_GAMEPORT    0x10 /* not in it8718, it8720, it8721 */
+#define WDT_GAMEPORT    0x10 /* not in it8718, it8720, it8721, it8728 */
 #define WDT_FORCE       0x02
 #define WDT_ZERO        0x01
 
@@ -616,6 +618,7 @@ static int __init it87_wdt_init(void)
         case IT8718_ID:
         case IT8720_ID:
         case IT8721_ID:
+        case IT8728_ID:
                 max_units = 65535;
                 try_gameport = 0;
                 break;
diff --git a/drivers/watchdog/ixp2000_wdt.c b/drivers/watchdog/ixp2000_wdt.c
deleted file mode 100644
index 3f047a58d3ae..000000000000
--- a/drivers/watchdog/ixp2000_wdt.c
+++ /dev/null
@@ -1,215 +0,0 @@
-/*
- * drivers/char/watchdog/ixp2000_wdt.c
- *
- * Watchdog driver for Intel IXP2000 network processors
- *
- * Adapted from the IXP4xx watchdog driver by Lennert Buytenhek.
- * The original version carries these notices:
- *
- * Author: Deepak Saxena <dsaxena@plexity.net>
- *
- * Copyright 2004 (c) MontaVista, Software, Inc.
- * Based on sa1100 driver, Copyright (C) 2000 Oleg Drokin <green@crimea.edu>
- *
- * This file is licensed under  the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/timer.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-#include <linux/uaccess.h>
-#include <mach/hardware.h>
-
-static bool nowayout = WATCHDOG_NOWAYOUT;
-static unsigned int heartbeat = 60;     /* (secs) Default is 1 minute */
-static unsigned long wdt_status;
-static DEFINE_SPINLOCK(wdt_lock);
-
-#define WDT_IN_USE              0
-#define WDT_OK_TO_CLOSE         1
-
-static unsigned long wdt_tick_rate;
-
-static void wdt_enable(void)
-{
-        spin_lock(&wdt_lock);
-        ixp2000_reg_write(IXP2000_RESET0, *(IXP2000_RESET0) | WDT_RESET_ENABLE);
-        ixp2000_reg_write(IXP2000_TWDE, WDT_ENABLE);
-        ixp2000_reg_write(IXP2000_T4_CLD, heartbeat * wdt_tick_rate);
-        ixp2000_reg_write(IXP2000_T4_CTL, TIMER_DIVIDER_256 | TIMER_ENABLE);
-        spin_unlock(&wdt_lock);
-}
-
-static void wdt_disable(void)
-{
-        spin_lock(&wdt_lock);
-        ixp2000_reg_write(IXP2000_T4_CTL, 0);
-        spin_unlock(&wdt_lock);
-}
-
-static void wdt_keepalive(void)
-{
-        spin_lock(&wdt_lock);
-        ixp2000_reg_write(IXP2000_T4_CLD, heartbeat * wdt_tick_rate);
-        spin_unlock(&wdt_lock);
-}
-
-static int ixp2000_wdt_open(struct inode *inode, struct file *file)
-{
-        if (test_and_set_bit(WDT_IN_USE, &wdt_status))
-                return -EBUSY;
-
-        clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
-        wdt_enable();
-
-        return nonseekable_open(inode, file);
-}
-
-static ssize_t ixp2000_wdt_write(struct file *file, const char *data,
-                                                size_t len, loff_t *ppos)
-{
-        if (len) {
-                if (!nowayout) {
-                        size_t i;
-
-                        clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
-                        for (i = 0; i != len; i++) {
-                                char c;
-
-                                if (get_user(c, data + i))
-                                        return -EFAULT;
-                                if (c == 'V')
-                                        set_bit(WDT_OK_TO_CLOSE, &wdt_status);
-                        }
-                }
-                wdt_keepalive();
-        }
-
-        return len;
-}
-
-
-static const struct watchdog_info ident = {
-        .options        = WDIOF_MAGICCLOSE | WDIOF_SETTIMEOUT |
-                                WDIOF_KEEPALIVEPING,
-        .identity       = "IXP2000 Watchdog",
-};
-
-static long ixp2000_wdt_ioctl(struct file *file, unsigned int cmd,
-                                                        unsigned long arg)
-{
-        int ret = -ENOTTY;
-        int time;
-
-        switch (cmd) {
-        case WDIOC_GETSUPPORT:
-                ret = copy_to_user((struct watchdog_info *)arg, &ident,
-                                   sizeof(ident)) ? -EFAULT : 0;
-                break;
-
-        case WDIOC_GETSTATUS:
-                ret = put_user(0, (int *)arg);
-                break;
-
-        case WDIOC_GETBOOTSTATUS:
-                ret = put_user(0, (int *)arg);
-                break;
-
-        case WDIOC_KEEPALIVE:
-                wdt_enable();
-                ret = 0;
-                break;
-
-        case WDIOC_SETTIMEOUT:
-                ret = get_user(time, (int *)arg);
-                if (ret)
-                        break;
-
-                if (time <= 0 || time > 60) {
-                        ret = -EINVAL;
-                        break;
-                }
-
-                heartbeat = time;
-                wdt_keepalive();
-                /* Fall through */
-
-        case WDIOC_GETTIMEOUT:
-                ret = put_user(heartbeat, (int *)arg);
-                break;
-        }
-
-        return ret;
-}
-
-static int ixp2000_wdt_release(struct inode *inode, struct file *file)
-{
-        if (test_bit(WDT_OK_TO_CLOSE, &wdt_status))
-                wdt_disable();
-        else
-                pr_crit("Device closed unexpectedly - timer will not stop\n");
-        clear_bit(WDT_IN_USE, &wdt_status);
-        clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
-        return 0;
-}
-
-
-static const struct file_operations ixp2000_wdt_fops = {
-        .owner          = THIS_MODULE,
-        .llseek         = no_llseek,
-        .write          = ixp2000_wdt_write,
-        .unlocked_ioctl = ixp2000_wdt_ioctl,
-        .open           = ixp2000_wdt_open,
-        .release        = ixp2000_wdt_release,
-};
-
-static struct miscdevice ixp2000_wdt_miscdev = {
-        .minor          = WATCHDOG_MINOR,
-        .name           = "watchdog",
-        .fops           = &ixp2000_wdt_fops,
-};
-
-static int __init ixp2000_wdt_init(void)
-{
-        if ((*IXP2000_PRODUCT_ID & 0x001ffef0) == 0x00000000) {
-                pr_info("Unable to use IXP2000 watchdog due to IXP2800 erratum #25\n");
-                return -EIO;
-        }
-        wdt_tick_rate = (*IXP2000_T1_CLD * HZ) / 256;
-        return misc_register(&ixp2000_wdt_miscdev);
-}
-
-static void __exit ixp2000_wdt_exit(void)
-{
-        misc_deregister(&ixp2000_wdt_miscdev);
-}
-
-module_init(ixp2000_wdt_init);
-module_exit(ixp2000_wdt_exit);
-
-MODULE_AUTHOR("Deepak Saxena <dsaxena@plexity.net>");
-MODULE_DESCRIPTION("IXP2000 Network Processor Watchdog");
-
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds (default 60s)");
-
-module_param(nowayout, bool, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
-
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
diff --git a/drivers/watchdog/pcwd_pci.c b/drivers/watchdog/pcwd_pci.c
index c891399bed6a..ee6900da8678 100644
--- a/drivers/watchdog/pcwd_pci.c
+++ b/drivers/watchdog/pcwd_pci.c
@@ -707,6 +707,7 @@ static int __devinit pcipcwd_card_init(struct pci_dev *pdev,
                 goto err_out_disable_device;
         }
 
+        spin_lock_init(&pcipcwd_private.io_lock);
         pcipcwd_private.pdev = pdev;
         pcipcwd_private.io_addr = pci_resource_start(pdev, 0);
 
@@ -814,22 +815,7 @@ static struct pci_driver pcipcwd_driver = {
         .remove         = __devexit_p(pcipcwd_card_exit),
 };
 
-static int __init pcipcwd_init_module(void)
-{
-        spin_lock_init(&pcipcwd_private.io_lock);
-
-        return pci_register_driver(&pcipcwd_driver);
-}
-
-static void __exit pcipcwd_cleanup_module(void)
-{
-        pci_unregister_driver(&pcipcwd_driver);
-
-        pr_info("Watchdog Module Unloaded\n");
-}
-
-module_init(pcipcwd_init_module);
-module_exit(pcipcwd_cleanup_module);
+module_pci_driver(pcipcwd_driver);
 
 MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>");
 MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver");
diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c
index 6b8432f61d05..87722e126058 100644
--- a/drivers/watchdog/pnx4008_wdt.c
+++ b/drivers/watchdog/pnx4008_wdt.c
@@ -32,6 +32,7 @@
 #include <linux/io.h>
 #include <linux/slab.h>
 #include <linux/err.h>
+#include <linux/of.h>
 #include <mach/hardware.h>
 
 /* WatchDog Timer - Chapter 23 Page 207 */
@@ -201,10 +202,19 @@ static int __devexit pnx4008_wdt_remove(struct platform_device *pdev)
         return 0;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id pnx4008_wdt_match[] = {
+        { .compatible = "nxp,pnx4008-wdt" },
+        { }
+};
+MODULE_DEVICE_TABLE(of, pnx4008_wdt_match);
+#endif
+
 static struct platform_driver platform_wdt_driver = {
         .driver = {
                 .name = "pnx4008-watchdog",
                 .owner  = THIS_MODULE,
+                .of_match_table = of_match_ptr(pnx4008_wdt_match),
         },
         .probe = pnx4008_wdt_probe,
         .remove = __devexit_p(pnx4008_wdt_remove),
diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
index 04e5a6de47d7..200ece5e2a22 100644
--- a/drivers/watchdog/s3c2410_wdt.c
+++ b/drivers/watchdog/s3c2410_wdt.c
@@ -40,6 +40,7 @@
 #include <linux/cpufreq.h>
 #include <linux/slab.h>
 #include <linux/err.h>
+#include <linux/of.h>
 
 #include <mach/map.h>
 
@@ -201,7 +202,7 @@ static int s3c2410wdt_set_heartbeat(struct watchdog_device *wdd, unsigned timeou
         writel(count, wdt_base + S3C2410_WTDAT);
         writel(wtcon, wdt_base + S3C2410_WTCON);
 
-        wdd->timeout = timeout;
+        wdd->timeout = (count * divisor) / freq;
 
         return 0;
 }
@@ -503,8 +504,6 @@ static const struct of_device_id s3c2410_wdt_match[] = {
         {},
 };
 MODULE_DEVICE_TABLE(of, s3c2410_wdt_match);
-#else
-#define s3c2410_wdt_match NULL
 #endif
 
 static struct platform_driver s3c2410wdt_driver = {
@@ -516,7 +515,7 @@ static struct platform_driver s3c2410wdt_driver = {
         .driver         = {
                 .owner  = THIS_MODULE,
                 .name   = "s3c2410-wdt",
-                .of_match_table = s3c2410_wdt_match,
+                .of_match_table = of_match_ptr(s3c2410_wdt_match),
         },
 };
 
diff --git a/drivers/watchdog/sch311x_wdt.c b/drivers/watchdog/sch311x_wdt.c
index bd86f32d63ab..f8477002b728 100644
--- a/drivers/watchdog/sch311x_wdt.c
+++ b/drivers/watchdog/sch311x_wdt.c
@@ -41,7 +41,6 @@
 #define DRV_NAME        "sch311x_wdt"
 
 /* Runtime registers */
-#define RESGEN                  0x1d
 #define GP60                    0x47
 #define WDT_TIME_OUT            0x65
 #define WDT_VAL                 0x66
@@ -69,10 +68,6 @@ static unsigned short force_id;
 module_param(force_id, ushort, 0);
 MODULE_PARM_DESC(force_id, "Override the detected device ID");
 
-static unsigned short therm_trip;
-module_param(therm_trip, ushort, 0);
-MODULE_PARM_DESC(therm_trip, "Should a ThermTrip trigger the reset generator");
-
 #define WATCHDOG_TIMEOUT 60             /* 60 sec default timeout */
 static int timeout = WATCHDOG_TIMEOUT;  /* in seconds */
 module_param(timeout, int, 0);
@@ -358,26 +353,16 @@ static struct miscdevice sch311x_wdt_miscdev = {
 static int __devinit sch311x_wdt_probe(struct platform_device *pdev)
 {
         struct device *dev = &pdev->dev;
-        unsigned char val;
         int err;
 
         spin_lock_init(&sch311x_wdt_data.io_lock);
 
-        if (!request_region(sch311x_wdt_data.runtime_reg + RESGEN, 1,
-                                                                DRV_NAME)) {
-                dev_err(dev, "Failed to request region 0x%04x-0x%04x.\n",
-                        sch311x_wdt_data.runtime_reg + RESGEN,
-                        sch311x_wdt_data.runtime_reg + RESGEN);
-                err = -EBUSY;
-                goto exit;
-        }
-
         if (!request_region(sch311x_wdt_data.runtime_reg + GP60, 1, DRV_NAME)) {
                 dev_err(dev, "Failed to request region 0x%04x-0x%04x.\n",
                         sch311x_wdt_data.runtime_reg + GP60,
                         sch311x_wdt_data.runtime_reg + GP60);
                 err = -EBUSY;
-                goto exit_release_region;
+                goto exit;
         }
 
         if (!request_region(sch311x_wdt_data.runtime_reg + WDT_TIME_OUT, 4,
@@ -386,7 +371,7 @@ static int __devinit sch311x_wdt_probe(struct platform_device *pdev)
                         sch311x_wdt_data.runtime_reg + WDT_TIME_OUT,
                         sch311x_wdt_data.runtime_reg + WDT_CTRL);
                 err = -EBUSY;
-                goto exit_release_region2;
+                goto exit_release_region;
         }
 
         /* Make sure that the watchdog is not running */
@@ -414,24 +399,13 @@ static int __devinit sch311x_wdt_probe(struct platform_device *pdev)
         /* Get status at boot */
         sch311x_wdt_get_status(&sch311x_wdt_data.boot_status);
 
-        /* enable watchdog */
-        /* -- Reset Generator --
-         * Bit 0   Enable Watchdog Timer Generation: 0* = Enabled, 1 = Disabled
-         * Bit 1   Thermtrip Source Select: O* = No Source, 1 = Source
-         * Bit 2   WDT2_CTL: WDT input bit
-         * Bit 3-7 Reserved
-         */
-        outb(0, sch311x_wdt_data.runtime_reg + RESGEN);
-        val = therm_trip ? 0x06 : 0x04;
-        outb(val, sch311x_wdt_data.runtime_reg + RESGEN);
-
         sch311x_wdt_miscdev.parent = dev;
 
         err = misc_register(&sch311x_wdt_miscdev);
         if (err != 0) {
                 dev_err(dev, "cannot register miscdev on minor=%d (err=%d)\n",
                                                         WATCHDOG_MINOR, err);
-                goto exit_release_region3;
+                goto exit_release_region2;
         }
 
         dev_info(dev,
@@ -440,12 +414,10 @@ static int __devinit sch311x_wdt_probe(struct platform_device *pdev)
 
         return 0;
 
-exit_release_region3:
-        release_region(sch311x_wdt_data.runtime_reg + WDT_TIME_OUT, 4);
 exit_release_region2:
-        release_region(sch311x_wdt_data.runtime_reg + GP60, 1);
+        release_region(sch311x_wdt_data.runtime_reg + WDT_TIME_OUT, 4);
 exit_release_region:
-        release_region(sch311x_wdt_data.runtime_reg + RESGEN, 1);
+        release_region(sch311x_wdt_data.runtime_reg + GP60, 1);
         sch311x_wdt_data.runtime_reg = 0;
 exit:
         return err;
@@ -461,7 +433,6 @@ static int __devexit sch311x_wdt_remove(struct platform_device *pdev)
         misc_deregister(&sch311x_wdt_miscdev);
         release_region(sch311x_wdt_data.runtime_reg + WDT_TIME_OUT, 4);
         release_region(sch311x_wdt_data.runtime_reg + GP60, 1);
-        release_region(sch311x_wdt_data.runtime_reg + RESGEN, 1);
         sch311x_wdt_data.runtime_reg = 0;
         return 0;
 }
diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c
index 59108e48ada3..ae5e82cb83fa 100644
--- a/drivers/watchdog/sp5100_tco.c
+++ b/drivers/watchdog/sp5100_tco.c
@@ -313,7 +313,7 @@ static unsigned char __devinit sp5100_tco_setupdevice(void)
         tcobase_phys = val;
 
         tcobase = ioremap(val, SP5100_WDT_MEM_MAP_SIZE);
-        if (tcobase == 0) {
+        if (!tcobase) {
                 pr_err("failed to get tcobase address\n");
                 goto unreg_mem_region;
         }
diff --git a/drivers/watchdog/via_wdt.c b/drivers/watchdog/via_wdt.c
index 465e08273c97..5603e31afdab 100644
--- a/drivers/watchdog/via_wdt.c
+++ b/drivers/watchdog/via_wdt.c
@@ -202,6 +202,9 @@ static int __devinit wdt_probe(struct pci_dev *pdev,
                 goto err_out_release;
         }
 
+        if (timeout < 1 || timeout > WDT_TIMEOUT_MAX)
+                timeout = WDT_TIMEOUT;
+
         wdt_dev.timeout = timeout;
         watchdog_set_nowayout(&wdt_dev, nowayout);
         if (readl(wdt_mem) & VIA_WDT_FIRED)
@@ -250,20 +253,7 @@ static struct pci_driver wdt_driver = {
         .remove         = __devexit_p(wdt_remove),
 };
 
-static int __init wdt_init(void)
-{
-        if (timeout < 1 || timeout > WDT_TIMEOUT_MAX)
-                timeout = WDT_TIMEOUT;
-        return pci_register_driver(&wdt_driver);
-}
-
-static void __exit wdt_exit(void)
-{
-        pci_unregister_driver(&wdt_driver);
-}
-
-module_init(wdt_init);
-module_exit(wdt_exit);
+module_pci_driver(wdt_driver);
 
 MODULE_AUTHOR("Marc Vertes");
 MODULE_DESCRIPTION("Driver for watchdog timer on VIA chipset");
diff --git a/drivers/watchdog/wdt_pci.c b/drivers/watchdog/wdt_pci.c
index 1c888c7d4cce..e32654efdbb6 100644
--- a/drivers/watchdog/wdt_pci.c
+++ b/drivers/watchdog/wdt_pci.c
@@ -739,39 +739,7 @@ static struct pci_driver wdtpci_driver = {
         .remove         = __devexit_p(wdtpci_remove_one),
 };
 
-
-/**
- *      wdtpci_cleanup:
- *
- *      Unload the watchdog. You cannot do this with any file handles open.
- *      If your watchdog is set to continue ticking on close and you unload
- *      it, well it keeps ticking. We won't get the interrupt but the board
- *      will not touch PC memory so all is fine. You just have to load a new
- *      module in xx seconds or reboot.
- */
-
-static void __exit wdtpci_cleanup(void)
-{
-        pci_unregister_driver(&wdtpci_driver);
-}
-
-
-/**
- *      wdtpci_init:
- *
- *      Set up the WDT watchdog board. All we have to do is grab the
- *      resources we require and bitch if anyone beat us to them.
- *      The open() function will actually kick the board off.
- */
-
-static int __init wdtpci_init(void)
-{
-        return pci_register_driver(&wdtpci_driver);
-}
-
-
-module_init(wdtpci_init);
-module_exit(wdtpci_cleanup);
+module_pci_driver(wdtpci_driver);
 
 MODULE_AUTHOR("JP Nollmann, Alan Cox");
 MODULE_DESCRIPTION("Driver for the ICS PCI-WDT500/501 watchdog cards");
diff --git a/drivers/watchdog/wm831x_wdt.c b/drivers/watchdog/wm831x_wdt.c
index b1815c5ed7a7..87d66d236c3e 100644
--- a/drivers/watchdog/wm831x_wdt.c
+++ b/drivers/watchdog/wm831x_wdt.c
@@ -247,8 +247,9 @@ static int __devinit wm831x_wdt_probe(struct platform_device *pdev)
                 reg |= pdata->software << WM831X_WDOG_RST_SRC_SHIFT;
 
                 if (pdata->update_gpio) {
-                        ret = gpio_request(pdata->update_gpio,
-                                           "Watchdog update");
+                        ret = gpio_request_one(pdata->update_gpio,
+                                               GPIOF_DIR_OUT | GPIOF_INIT_LOW,
+                                               "Watchdog update");
                         if (ret < 0) {
                                 dev_err(wm831x->dev,
                                         "Failed to request update GPIO: %d\n",
@@ -256,14 +257,6 @@ static int __devinit wm831x_wdt_probe(struct platform_device *pdev)
                                 goto err;
                         }
 
-                        ret = gpio_direction_output(pdata->update_gpio, 0);
-                        if (ret != 0) {
-                                dev_err(wm831x->dev,
-                                        "gpio_direction_output returned: %d\n",
-                                        ret);
-                                goto err_gpio;
-                        }
-
                         driver_data->update_gpio = pdata->update_gpio;
 
                         /* Make sure the watchdog takes hardware updates */