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-rw-r--r--drivers/watchdog/Kconfig38
-rw-r--r--drivers/watchdog/Makefile2
-rw-r--r--drivers/watchdog/ar7_wdt.c33
-rw-r--r--drivers/watchdog/hpwdt.c59
-rw-r--r--drivers/watchdog/i6300esb.c14
-rw-r--r--drivers/watchdog/ie6xx_wdt.c348
-rw-r--r--drivers/watchdog/it87_wdt.c7
-rw-r--r--drivers/watchdog/ixp2000_wdt.c215
-rw-r--r--drivers/watchdog/pcwd_pci.c18
-rw-r--r--drivers/watchdog/pnx4008_wdt.c10
-rw-r--r--drivers/watchdog/s3c2410_wdt.c7
-rw-r--r--drivers/watchdog/sch311x_wdt.c39
-rw-r--r--drivers/watchdog/shwdt.c306
-rw-r--r--drivers/watchdog/sp5100_tco.c2
-rw-r--r--drivers/watchdog/via_wdt.c18
-rw-r--r--drivers/watchdog/wdt_pci.c34
-rw-r--r--drivers/watchdog/wm831x_wdt.c13
17 files changed, 535 insertions, 628 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 37096246c937..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
@@ -937,7 +944,7 @@ config BCM47XX_WDT
tristate "Broadcom BCM47xx Watchdog Timer"
depends on BCM47XX
help
- Hardware driver for the Broadcom BCM47xx Watchog Timer.
+ Hardware driver for the Broadcom BCM47xx Watchdog Timer.
config RC32434_WDT
tristate "IDT RC32434 SoC Watchdog Timer"
@@ -1138,6 +1145,7 @@ config ZVM_WATCHDOG
config SH_WDT
tristate "SuperH Watchdog"
depends on SUPERH && (CPU_SH3 || CPU_SH4)
+ select WATCHDOG_CORE
help
This driver adds watchdog support for the integrated watchdog in the
SuperH processors. If you have one of these processors and wish
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 9f13b897fd64..2b763815aeec 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -147,7 +147,6 @@ struct cmn_registers {
static unsigned int hpwdt_nmi_decoding;
static unsigned int allow_kdump;
-static unsigned int priority; /* hpwdt at end of die_notify list */
static unsigned int is_icru;
static DEFINE_SPINLOCK(rom_lock);
static void *cru_rom_addr;
@@ -723,28 +722,35 @@ static int __devinit hpwdt_init_nmi_decoding(struct pci_dev *dev)
}
/*
- * If the priority is set to 1, then we will be put first on the
- * die notify list to handle a critical NMI. The default is to
- * be last so other users of the NMI signal can function.
+ * Only one function can register for NMI_UNKNOWN
*/
- retval = register_nmi_handler(NMI_UNKNOWN, hpwdt_pretimeout,
- (priority) ? NMI_FLAG_FIRST : 0,
- "hpwdt");
- if (retval != 0) {
- dev_warn(&dev->dev,
- "Unable to register a die notifier (err=%d).\n",
- retval);
- if (cru_rom_addr)
- iounmap(cru_rom_addr);
- }
+ retval = register_nmi_handler(NMI_UNKNOWN, hpwdt_pretimeout, 0, "hpwdt");
+ if (retval)
+ goto error;
+ retval = register_nmi_handler(NMI_SERR, hpwdt_pretimeout, 0, "hpwdt");
+ if (retval)
+ goto error1;
+ retval = register_nmi_handler(NMI_IO_CHECK, hpwdt_pretimeout, 0, "hpwdt");
+ if (retval)
+ goto error2;
dev_info(&dev->dev,
"HP Watchdog Timer Driver: NMI decoding initialized"
- ", allow kernel dump: %s (default = 0/OFF)"
- ", priority: %s (default = 0/LAST).\n",
- (allow_kdump == 0) ? "OFF" : "ON",
- (priority == 0) ? "LAST" : "FIRST");
+ ", allow kernel dump: %s (default = 0/OFF)\n",
+ (allow_kdump == 0) ? "OFF" : "ON");
return 0;
+
+error2:
+ unregister_nmi_handler(NMI_SERR, "hpwdt");
+error1:
+ unregister_nmi_handler(NMI_UNKNOWN, "hpwdt");
+error:
+ dev_warn(&dev->dev,
+ "Unable to register a die notifier (err=%d).\n",
+ retval);
+ if (cru_rom_addr)
+ iounmap(cru_rom_addr);
+ return retval;
}
static void hpwdt_exit_nmi_decoding(void)
@@ -855,16 +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");
@@ -881,11 +877,6 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
#ifdef CONFIG_HPWDT_NMI_DECODING
module_param(allow_kdump, int, 0);
MODULE_PARM_DESC(allow_kdump, "Start a kernel dump after NMI occurs");
-
-module_param(priority, int, 0);
-MODULE_PARM_DESC(priority, "The hpwdt driver handles NMIs first or last"
- " (default = 0/Last)\n");
#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/shwdt.c b/drivers/watchdog/shwdt.c
index 93958a7763e6..e5b59bebcdb1 100644
--- a/drivers/watchdog/shwdt.c
+++ b/drivers/watchdog/shwdt.c
@@ -3,7 +3,7 @@
*
* Watchdog driver for integrated watchdog in the SuperH processors.
*
- * Copyright (C) 2001 - 2010 Paul Mundt <lethal@linux-sh.org>
+ * Copyright (C) 2001 - 2012 Paul Mundt <lethal@linux-sh.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
@@ -25,16 +25,15 @@
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/types.h>
+#include <linux/spinlock.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
-#include <linux/reboot.h>
-#include <linux/notifier.h>
-#include <linux/ioport.h>
+#include <linux/pm_runtime.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/io.h>
-#include <linux/uaccess.h>
+#include <linux/clk.h>
#include <asm/watchdog.h>
#define DRV_NAME "sh-wdt"
@@ -69,10 +68,6 @@
static int clock_division_ratio = WTCSR_CKS_4096;
#define next_ping_period(cks) (jiffies + msecs_to_jiffies(cks - 4))
-static const struct watchdog_info sh_wdt_info;
-static struct platform_device *sh_wdt_dev;
-static DEFINE_SPINLOCK(shwdt_lock);
-
#define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat */
static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */
static bool nowayout = WATCHDOG_NOWAYOUT;
@@ -81,19 +76,22 @@ static unsigned long next_heartbeat;
struct sh_wdt {
void __iomem *base;
struct device *dev;
+ struct clk *clk;
+ spinlock_t lock;
struct timer_list timer;
-
- unsigned long enabled;
- char expect_close;
};
-static void sh_wdt_start(struct sh_wdt *wdt)
+static int sh_wdt_start(struct watchdog_device *wdt_dev)
{
+ struct sh_wdt *wdt = watchdog_get_drvdata(wdt_dev);
unsigned long flags;
u8 csr;
- spin_lock_irqsave(&shwdt_lock, flags);
+ pm_runtime_get_sync(wdt->dev);
+ clk_enable(wdt->clk);
+
+ spin_lock_irqsave(&wdt->lock, flags);
next_heartbeat = jiffies + (heartbeat * HZ);
mod_timer(&wdt->timer, next_ping_period(clock_division_ratio));
@@ -122,15 +120,18 @@ static void sh_wdt_start(struct sh_wdt *wdt)
csr &= ~RSTCSR_RSTS;
sh_wdt_write_rstcsr(csr);
#endif
- spin_unlock_irqrestore(&shwdt_lock, flags);
+ spin_unlock_irqrestore(&wdt->lock, flags);
+
+ return 0;
}
-static void sh_wdt_stop(struct sh_wdt *wdt)
+static int sh_wdt_stop(struct watchdog_device *wdt_dev)
{
+ struct sh_wdt *wdt = watchdog_get_drvdata(wdt_dev);
unsigned long flags;
u8 csr;
- spin_lock_irqsave(&shwdt_lock, flags);
+ spin_lock_irqsave(&wdt->lock, flags);
del_timer(&wdt->timer);
@@ -138,28 +139,39 @@ static void sh_wdt_stop(struct sh_wdt *wdt)
csr &= ~WTCSR_TME;
sh_wdt_write_csr(csr);
- spin_unlock_irqrestore(&shwdt_lock, flags);
+ spin_unlock_irqrestore(&wdt->lock, flags);
+
+ clk_disable(wdt->clk);
+ pm_runtime_put_sync(wdt->dev);
+
+ return 0;
}
-static inline void sh_wdt_keepalive(struct sh_wdt *wdt)
+static int sh_wdt_keepalive(struct watchdog_device *wdt_dev)
{
+ struct sh_wdt *wdt = watchdog_get_drvdata(wdt_dev);
unsigned long flags;
- spin_lock_irqsave(&shwdt_lock, flags);
+ spin_lock_irqsave(&wdt->lock, flags);
next_heartbeat = jiffies + (heartbeat * HZ);
- spin_unlock_irqrestore(&shwdt_lock, flags);
+ spin_unlock_irqrestore(&wdt->lock, flags);
+
+ return 0;
}
-static int sh_wdt_set_heartbeat(int t)
+static int sh_wdt_set_heartbeat(struct watchdog_device *wdt_dev, unsigned t)
{
+ struct sh_wdt *wdt = watchdog_get_drvdata(wdt_dev);
unsigned long flags;
if (unlikely(t < 1 || t > 3600)) /* arbitrary upper limit */
return -EINVAL;
- spin_lock_irqsave(&shwdt_lock, flags);
+ spin_lock_irqsave(&wdt->lock, flags);
heartbeat = t;
- spin_unlock_irqrestore(&shwdt_lock, flags);
+ wdt_dev->timeout = t;
+ spin_unlock_irqrestore(&wdt->lock, flags);
+
return 0;
}
@@ -168,7 +180,7 @@ static void sh_wdt_ping(unsigned long data)
struct sh_wdt *wdt = (struct sh_wdt *)data;
unsigned long flags;
- spin_lock_irqsave(&shwdt_lock, flags);
+ spin_lock_irqsave(&wdt->lock, flags);
if (time_before(jiffies, next_heartbeat)) {
u8 csr;
@@ -182,137 +194,9 @@ static void sh_wdt_ping(unsigned long data)
} else
dev_warn(wdt->dev, "Heartbeat lost! Will not ping "
"the watchdog\n");
- spin_unlock_irqrestore(&shwdt_lock, flags);
-}
-
-static int sh_wdt_open(struct inode *inode, struct file *file)
-{
- struct sh_wdt *wdt = platform_get_drvdata(sh_wdt_dev);
-
- if (test_and_set_bit(0, &wdt->enabled))
- return -EBUSY;
- if (nowayout)
- __module_get(THIS_MODULE);
-
- file->private_data = wdt;
-
- sh_wdt_start(wdt);
-
- return nonseekable_open(inode, file);
-}
-
-static int sh_wdt_close(struct inode *inode, struct file *file)
-{
- struct sh_wdt *wdt = file->private_data;
-
- if (wdt->expect_close == 42) {
- sh_wdt_stop(wdt);
- } else {
- dev_crit(wdt->dev, "Unexpected close, not "
- "stopping watchdog!\n");
- sh_wdt_keepalive(wdt);
- }
-
- clear_bit(0, &wdt->enabled);
- wdt->expect_close = 0;
-
- return 0;
-}
-
-static ssize_t sh_wdt_write(struct file *file, const char *buf,
- size_t count, loff_t *ppos)
-{
- struct sh_wdt *wdt = file->private_data;
-
- if (count) {
- if (!nowayout) {
- size_t i;
-
- wdt->expect_close = 0;
-
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf + i))
- return -EFAULT;
- if (c == 'V')
- wdt->expect_close = 42;
- }
- }
- sh_wdt_keepalive(wdt);
- }
-
- return count;
+ spin_unlock_irqrestore(&wdt->lock, flags);
}
-static long sh_wdt_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- struct sh_wdt *wdt = file->private_data;
- int new_heartbeat;
- int options, retval = -EINVAL;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user((struct watchdog_info *)arg,
- &sh_wdt_info, sizeof(sh_wdt_info)) ? -EFAULT : 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, (int *)arg);
- case WDIOC_SETOPTIONS:
- if (get_user(options, (int *)arg))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- sh_wdt_stop(wdt);
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- sh_wdt_start(wdt);
- retval = 0;
- }
-
- return retval;
- case WDIOC_KEEPALIVE:
- sh_wdt_keepalive(wdt);
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_heartbeat, (int *)arg))
- return -EFAULT;
-
- if (sh_wdt_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
- sh_wdt_keepalive(wdt);
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, (int *)arg);
- default:
- return -ENOTTY;
- }
- return 0;
-}
-
-static int sh_wdt_notify_sys(struct notifier_block *this,
- unsigned long code, void *unused)
-{
- struct sh_wdt *wdt = platform_get_drvdata(sh_wdt_dev);
-
- if (code == SYS_DOWN || code == SYS_HALT)
- sh_wdt_stop(wdt);
-
- return NOTIFY_DONE;
-}
-
-static const struct file_operations sh_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = sh_wdt_write,
- .unlocked_ioctl = sh_wdt_ioctl,
- .open = sh_wdt_open,
- .release = sh_wdt_close,
-};
-
static const struct watchdog_info sh_wdt_info = {
.options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
WDIOF_MAGICCLOSE,
@@ -320,14 +204,17 @@ static const struct watchdog_info sh_wdt_info = {
.identity = "SH WDT",
};
-static struct notifier_block sh_wdt_notifier = {
- .notifier_call = sh_wdt_notify_sys,
+static const struct watchdog_ops sh_wdt_ops = {
+ .owner = THIS_MODULE,
+ .start = sh_wdt_start,
+ .stop = sh_wdt_stop,
+ .ping = sh_wdt_keepalive,
+ .set_timeout = sh_wdt_set_heartbeat,
};
-static struct miscdevice sh_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &sh_wdt_fops,
+static struct watchdog_device sh_wdt_dev = {
+ .info = &sh_wdt_info,
+ .ops = &sh_wdt_ops,
};
static int __devinit sh_wdt_probe(struct platform_device *pdev)
@@ -347,39 +234,49 @@ static int __devinit sh_wdt_probe(struct platform_device *pdev)
if (unlikely(!res))
return -EINVAL;
- if (!devm_request_mem_region(&pdev->dev, res->start,
- resource_size(res), DRV_NAME))
- return -EBUSY;
-
wdt = devm_kzalloc(&pdev->dev, sizeof(struct sh_wdt), GFP_KERNEL);
- if (unlikely(!wdt)) {
- rc = -ENOMEM;
- goto out_release;
- }
+ if (unlikely(!wdt))
+ return -ENOMEM;
wdt->dev = &pdev->dev;
- wdt->base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+ wdt->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(wdt->clk)) {
+ /*
+ * Clock framework support is optional, continue on
+ * anyways if we don't find a matching clock.
+ */
+ wdt->clk = NULL;
+ }
+
+ wdt->base = devm_request_and_ioremap(wdt->dev, res);
if (unlikely(!wdt->base)) {
- rc = -ENXIO;
- goto out_err;
+ rc = -EADDRNOTAVAIL;
+ goto err;
}
- rc = register_reboot_notifier(&sh_wdt_notifier);
+ watchdog_set_nowayout(&sh_wdt_dev, nowayout);
+ watchdog_set_drvdata(&sh_wdt_dev, wdt);
+
+ spin_lock_init(&wdt->lock);
+
+ rc = sh_wdt_set_heartbeat(&sh_wdt_dev, heartbeat);
if (unlikely(rc)) {
- dev_err(&pdev->dev,
- "Can't register reboot notifier (err=%d)\n", rc);
- goto out_unmap;
+ /* Default timeout if invalid */
+ sh_wdt_set_heartbeat(&sh_wdt_dev, WATCHDOG_HEARTBEAT);
+
+ dev_warn(&pdev->dev,
+ "heartbeat value must be 1<=x<=3600, using %d\n",
+ sh_wdt_dev.timeout);
}
- sh_wdt_miscdev.parent = wdt->dev;
+ dev_info(&pdev->dev, "configured with heartbeat=%d sec (nowayout=%d)\n",
+ sh_wdt_dev.timeout, nowayout);
- rc = misc_register(&sh_wdt_miscdev);
+ rc = watchdog_register_device(&sh_wdt_dev);
if (unlikely(rc)) {
- dev_err(&pdev->dev,
- "Can't register miscdev on minor=%d (err=%d)\n",
- sh_wdt_miscdev.minor, rc);
- goto out_unreg;
+ dev_err(&pdev->dev, "Can't register watchdog (err=%d)\n", rc);
+ goto err;
}
init_timer(&wdt->timer);
@@ -388,20 +285,15 @@ static int __devinit sh_wdt_probe(struct platform_device *pdev)
wdt->timer.expires = next_ping_period(clock_division_ratio);
platform_set_drvdata(pdev, wdt);
- sh_wdt_dev = pdev;
dev_info(&pdev->dev, "initialized.\n");
+ pm_runtime_enable(&pdev->dev);
+
return 0;
-out_unreg:
- unregister_reboot_notifier(&sh_wdt_notifier);
-out_unmap:
- devm_iounmap(&pdev->dev, wdt->base);
-out_err:
- devm_kfree(&pdev->dev, wdt);
-out_release:
- devm_release_mem_region(&pdev->dev, res->start, resource_size(res));
+err:
+ clk_put(wdt->clk);
return rc;
}
@@ -409,36 +301,35 @@ out_release:
static int __devexit sh_wdt_remove(struct platform_device *pdev)
{
struct sh_wdt *wdt = platform_get_drvdata(pdev);
- struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
platform_set_drvdata(pdev, NULL);
- misc_deregister(&sh_wdt_miscdev);
+ watchdog_unregister_device(&sh_wdt_dev);
- sh_wdt_dev = NULL;
-
- unregister_reboot_notifier(&sh_wdt_notifier);
- devm_release_mem_region(&pdev->dev, res->start, resource_size(res));
- devm_iounmap(&pdev->dev, wdt->base);
- devm_kfree(&pdev->dev, wdt);
+ pm_runtime_disable(&pdev->dev);
+ clk_put(wdt->clk);
return 0;
}
+static void sh_wdt_shutdown(struct platform_device *pdev)
+{
+ sh_wdt_stop(&sh_wdt_dev);
+}
+
static struct platform_driver sh_wdt_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
},
- .probe = sh_wdt_probe,
- .remove = __devexit_p(sh_wdt_remove),
+ .probe = sh_wdt_probe,
+ .remove = __devexit_p(sh_wdt_remove),
+ .shutdown = sh_wdt_shutdown,
};
static int __init sh_wdt_init(void)
{
- int rc;
-
if (unlikely(clock_division_ratio < 0x5 ||
clock_division_ratio > 0x7)) {
clock_division_ratio = WTCSR_CKS_4096;
@@ -447,17 +338,6 @@ static int __init sh_wdt_init(void)
clock_division_ratio);
}
- rc = sh_wdt_set_heartbeat(heartbeat);
- if (unlikely(rc)) {
- heartbeat = WATCHDOG_HEARTBEAT;
-
- pr_info("heartbeat value must be 1<=x<=3600, using %d\n",
- heartbeat);
- }
-
- pr_info("configured with heartbeat=%d sec (nowayout=%d)\n",
- heartbeat, nowayout);
-
return platform_driver_register(&sh_wdt_driver);
}
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 */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.