mirror of https://gitee.com/openkylin/linux.git
[WATCHDOG] acquirewdt.c - clean before platform_device patches
Clean the current code before we convert the driver to a platform_device. This clean consists of: - document the includes - make sure that the printk's use the module/driver-name - do the exit of the module exactly the opposite of the init of the module Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Wim Van Sebroeck
parent
f3dc07330c
commit
76c11f0442
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@ -48,46 +48,52 @@
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* It can be 1, 2, 10, 20, 110 or 220 seconds.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/types.h>
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#include <linux/miscdevice.h>
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#include <linux/watchdog.h>
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#include <linux/fs.h>
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#include <linux/ioport.h>
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#include <linux/notifier.h>
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#include <linux/reboot.h>
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#include <linux/init.h>
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/*
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* Includes, defines, variables, module parameters, ...
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*/
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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/* Includes */
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#include <linux/module.h> /* For module specific items */
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#include <linux/moduleparam.h> /* For new moduleparam's */
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#include <linux/types.h> /* For standard types (like size_t) */
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#include <linux/errno.h> /* For the -ENODEV/... values */
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#include <linux/kernel.h> /* For printk/panic/... */
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#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
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#include <linux/watchdog.h> /* For the watchdog specific items */
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#include <linux/fs.h> /* For file operations */
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#include <linux/ioport.h> /* For io-port access */
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#include <linux/notifier.h> /* For reboot notifier */
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#include <linux/reboot.h> /* For reboot notifier */
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#include <linux/init.h> /* For __init/__exit/... */
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#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
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#include <asm/io.h> /* For inb/outb/... */
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/* Module information */
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#define DRV_NAME "acquirewdt"
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#define PFX DRV_NAME ": "
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#define WATCHDOG_NAME "Acquire WDT"
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#define PFX WATCHDOG_NAME ": "
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#define WATCHDOG_HEARTBEAT 0 /* There is no way to see what the correct time-out period is */
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/* internal variables */
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static unsigned long acq_is_open;
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static char expect_close;
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/*
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* You must set these - there is no sane way to probe for this board.
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*/
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static int wdt_stop = 0x43;
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/* module parameters */
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static int wdt_stop = 0x43; /* You must set this - there is no sane way to probe for this board. */
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module_param(wdt_stop, int, 0);
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MODULE_PARM_DESC(wdt_stop, "Acquire WDT 'stop' io port (default 0x43)");
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static int wdt_start = 0x443;
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static int wdt_start = 0x443; /* You must set this - there is no sane way to probe for this board. */
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module_param(wdt_start, int, 0);
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MODULE_PARM_DESC(wdt_start, "Acquire WDT 'start' io port (default 0x443)");
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static int nowayout = WATCHDOG_NOWAYOUT;
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module_param(nowayout, int, 0);
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MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
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MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
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/*
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* Kernel methods.
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* Watchdog Operations
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*/
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static void acq_keepalive(void)
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@ -103,7 +109,7 @@ static void acq_stop(void)
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}
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/*
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* /dev/watchdog handling.
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* /dev/watchdog handling
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*/
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static ssize_t acq_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
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@ -143,7 +149,7 @@ static int acq_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
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{
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.options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
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.firmware_version = 1,
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.identity = "Acquire WDT",
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.identity = WATCHDOG_NAME,
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};
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switch(cmd)
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@ -240,11 +246,10 @@ static const struct file_operations acq_fops = {
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.release = acq_close,
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};
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static struct miscdevice acq_miscdev=
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{
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.minor = WATCHDOG_MINOR,
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.name = "watchdog",
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.fops = &acq_fops,
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static struct miscdevice acq_miscdev = {
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.minor = WATCHDOG_MINOR,
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.name = "watchdog",
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.fops = &acq_fops,
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};
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/*
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@ -252,11 +257,14 @@ static struct miscdevice acq_miscdev=
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* turn the timebomb registers off.
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*/
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static struct notifier_block acq_notifier =
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{
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static struct notifier_block acq_notifier = {
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.notifier_call = acq_notify_sys,
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};
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/*
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* Init & exit routines
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*/
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static int __init acq_init(void)
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{
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int ret;
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@ -313,9 +321,9 @@ static void __exit acq_exit(void)
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{
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misc_deregister(&acq_miscdev);
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unregister_reboot_notifier(&acq_notifier);
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release_region(wdt_start,1);
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if(wdt_stop != wdt_start)
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release_region(wdt_stop,1);
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release_region(wdt_start,1);
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}
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module_init(acq_init);
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