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path: root/drivers/watchdog/cpwd.c
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Diffstat (limited to 'drivers/watchdog/cpwd.c')
-rw-r--r--drivers/watchdog/cpwd.c89
1 files changed, 38 insertions, 51 deletions
diff --git a/drivers/watchdog/cpwd.c b/drivers/watchdog/cpwd.c
index eca855a55c0..e55ed702209 100644
--- a/drivers/watchdog/cpwd.c
+++ b/drivers/watchdog/cpwd.c
@@ -5,21 +5,22 @@
* interface and Solaris-compatible ioctls as best it is
* able.
*
- * NOTE: CP1400 systems appear to have a defective intr_mask
- * register on the PLD, preventing the disabling of
- * timer interrupts. We use a timer to periodically
- * reset 'stopped' watchdogs on affected platforms.
+ * NOTE: CP1400 systems appear to have a defective intr_mask
+ * register on the PLD, preventing the disabling of
+ * timer interrupts. We use a timer to periodically
+ * reset 'stopped' watchdogs on affected platforms.
*
* Copyright (c) 2000 Eric Brower (ebrower@usa.net)
* Copyright (C) 2008 David S. Miller <davem@davemloft.net>
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/errno.h>
#include <linux/major.h>
-#include <linux/init.h>
#include <linux/miscdevice.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
@@ -35,7 +36,6 @@
#include <asm/watchdog.h>
#define DRIVER_NAME "cpwd"
-#define PFX DRIVER_NAME ": "
#define WD_OBPNAME "watchdog"
#define WD_BADMODEL "SUNW,501-5336"
@@ -107,13 +107,13 @@ static struct cpwd *cpwd_device;
* -------------------
* |- counter val -|
* -------------------
- * dcntr - Current 16-bit downcounter value.
- * When downcounter reaches '0' watchdog expires.
- * Reading this register resets downcounter with
- * 'limit' value.
- * limit - 16-bit countdown value in 1/10th second increments.
- * Writing this register begins countdown with input value.
- * Reading from this register does not affect counter.
+ * dcntr - Current 16-bit downcounter value.
+ * When downcounter reaches '0' watchdog expires.
+ * Reading this register resets downcounter with
+ * 'limit' value.
+ * limit - 16-bit countdown value in 1/10th second increments.
+ * Writing this register begins countdown with input value.
+ * Reading from this register does not affect counter.
* NOTES: After watchdog reset, dcntr and limit contain '1'
*
* status register (byte access):
@@ -123,7 +123,7 @@ static struct cpwd *cpwd_device;
* |- UNUSED -| EXP | RUN |
* ---------------------------
* status- Bit 0 - Watchdog is running
- * Bit 1 - Watchdog has expired
+ * Bit 1 - Watchdog has expired
*
*** PLD register block definition (struct wd_pld_regblk)
*
@@ -197,7 +197,7 @@ static u8 cpwd_readb(void __iomem *addr)
* Because of the CP1400 defect this should only be
* called during initialzation or by wd_[start|stop]timer()
*
- * index - sub-device index, or -1 for 'all'
+ * index - sub-device index, or -1 for 'all'
* enable - non-zero to enable interrupts, zero to disable
*/
static void cpwd_toggleintr(struct cpwd *p, int index, int enable)
@@ -317,13 +317,13 @@ static int cpwd_getstatus(struct cpwd *p, int index)
} else {
/* Fudge WD_EXPIRED status for defective CP1400--
* IF timer is running
- * AND brokenstop is set
- * AND an interrupt has been serviced
+ * AND brokenstop is set
+ * AND an interrupt has been serviced
* we are WD_EXPIRED.
*
* IF timer is running
- * AND brokenstop is set
- * AND no interrupt has been serviced
+ * AND brokenstop is set
+ * AND no interrupt has been serviced
* we are WD_FREERUN.
*/
if (p->broken &&
@@ -385,8 +385,7 @@ static int cpwd_open(struct inode *inode, struct file *f)
if (!p->initialized) {
if (request_irq(p->irq, &cpwd_interrupt,
IRQF_SHARED, DRIVER_NAME, p)) {
- printk(KERN_ERR PFX "Cannot register IRQ %d\n",
- p->irq);
+ pr_err("Cannot register IRQ %d\n", p->irq);
mutex_unlock(&cpwd_mutex);
return -EBUSY;
}
@@ -411,7 +410,7 @@ static long cpwd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
.identity = DRIVER_NAME,
};
void __user *argp = (void __user *)arg;
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
int index = iminor(inode) - WD0_MINOR;
struct cpwd *p = cpwd_device;
int setopt = 0;
@@ -499,7 +498,7 @@ static long cpwd_compat_ioctl(struct file *file, unsigned int cmd,
static ssize_t cpwd_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct cpwd *p = cpwd_device;
int index = iminor(inode);
@@ -528,8 +527,7 @@ static const struct file_operations cpwd_fops = {
.llseek = no_llseek,
};
-static int __devinit cpwd_probe(struct platform_device *op,
- const struct of_device_id *match)
+static int cpwd_probe(struct platform_device *op)
{
struct device_node *options;
const char *str_prop;
@@ -543,7 +541,7 @@ static int __devinit cpwd_probe(struct platform_device *op,
p = kzalloc(sizeof(*p), GFP_KERNEL);
err = -ENOMEM;
if (!p) {
- printk(KERN_ERR PFX "Unable to allocate struct cpwd.\n");
+ pr_err("Unable to allocate struct cpwd\n");
goto out;
}
@@ -554,14 +552,14 @@ static int __devinit cpwd_probe(struct platform_device *op,
p->regs = of_ioremap(&op->resource[0], 0,
4 * WD_TIMER_REGSZ, DRIVER_NAME);
if (!p->regs) {
- printk(KERN_ERR PFX "Unable to map registers.\n");
+ pr_err("Unable to map registers\n");
goto out_free;
}
options = of_find_node_by_path("/options");
err = -ENODEV;
if (!options) {
- printk(KERN_ERR PFX "Unable to find /options node.\n");
+ pr_err("Unable to find /options node\n");
goto out_iounmap;
}
@@ -606,23 +604,23 @@ static int __devinit cpwd_probe(struct platform_device *op,
err = misc_register(&p->devs[i].misc);
if (err) {
- printk(KERN_ERR "Could not register misc device for "
- "dev %d\n", i);
+ pr_err("Could not register misc device for dev %d\n",
+ i);
goto out_unregister;
}
}
if (p->broken) {
init_timer(&cpwd_timer);
- cpwd_timer.function = cpwd_brokentimer;
+ cpwd_timer.function = cpwd_brokentimer;
cpwd_timer.data = (unsigned long) p;
cpwd_timer.expires = WD_BTIMEOUT;
- printk(KERN_INFO PFX "PLD defect workaround enabled for "
- "model " WD_BADMODEL ".\n");
+ pr_info("PLD defect workaround enabled for model %s\n",
+ WD_BADMODEL);
}
- dev_set_drvdata(&op->dev, p);
+ platform_set_drvdata(op, p);
cpwd_device = p;
err = 0;
@@ -641,12 +639,12 @@ out_free:
goto out;
}
-static int __devexit cpwd_remove(struct platform_device *op)
+static int cpwd_remove(struct platform_device *op)
{
- struct cpwd *p = dev_get_drvdata(&op->dev);
+ struct cpwd *p = platform_get_drvdata(op);
int i;
- for (i = 0; i < 4; i++) {
+ for (i = 0; i < WD_NUMDEVS; i++) {
misc_deregister(&p->devs[i].misc);
if (!p->enabled) {
@@ -678,25 +676,14 @@ static const struct of_device_id cpwd_match[] = {
};
MODULE_DEVICE_TABLE(of, cpwd_match);
-static struct of_platform_driver cpwd_driver = {
+static struct platform_driver cpwd_driver = {
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
.of_match_table = cpwd_match,
},
.probe = cpwd_probe,
- .remove = __devexit_p(cpwd_remove),
+ .remove = cpwd_remove,
};
-static int __init cpwd_init(void)
-{
- return of_register_platform_driver(&cpwd_driver);
-}
-
-static void __exit cpwd_exit(void)
-{
- of_unregister_platform_driver(&cpwd_driver);
-}
-
-module_init(cpwd_init);
-module_exit(cpwd_exit);
+module_platform_driver(cpwd_driver);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-05 09:15:39 +0000