diff options
Diffstat (limited to 'drivers/watchdog/ks8695_wdt.c')
| -rw-r--r-- | drivers/watchdog/ks8695_wdt.c | 46 |
1 files changed, 29 insertions, 17 deletions
diff --git a/drivers/watchdog/ks8695_wdt.c b/drivers/watchdog/ks8695_wdt.c index 74c92d38411..40ca5594a33 100644 --- a/drivers/watchdog/ks8695_wdt.c +++ b/drivers/watchdog/ks8695_wdt.c @@ -8,6 +8,8 @@ * published by the Free Software Foundation. */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/bitops.h> #include <linux/errno.h> #include <linux/fs.h> @@ -21,28 +23,40 @@ #include <linux/watchdog.h> #include <linux/io.h> #include <linux/uaccess.h> -#include <mach/timex.h> -#include <mach/regs-timer.h> +#include <mach/hardware.h> + +#define KS8695_TMR_OFFSET (0xF0000 + 0xE400) +#define KS8695_TMR_VA (KS8695_IO_VA + KS8695_TMR_OFFSET) + +/* + * Timer registers + */ +#define KS8695_TMCON (0x00) /* Timer Control Register */ +#define KS8695_T0TC (0x08) /* Timer 0 Timeout Count Register */ +#define TMCON_T0EN (1 << 0) /* Timer 0 Enable */ + +/* Timer0 Timeout Counter Register */ +#define T0TC_WATCHDOG (0xff) /* Enable watchdog mode */ #define WDT_DEFAULT_TIME 5 /* seconds */ #define WDT_MAX_TIME 171 /* seconds */ static int wdt_time = WDT_DEFAULT_TIME; -static int nowayout = WATCHDOG_NOWAYOUT; +static bool nowayout = WATCHDOG_NOWAYOUT; module_param(wdt_time, int, 0); MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default=" __MODULE_STRING(WDT_DEFAULT_TIME) ")"); #ifdef CONFIG_WATCHDOG_NOWAYOUT -module_param(nowayout, int, 0); +module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); #endif static unsigned long ks8695wdt_busy; -static spinlock_t ks8695_lock; +static DEFINE_SPINLOCK(ks8695_lock); /* ......................................................................... */ @@ -66,7 +80,7 @@ static inline void ks8695_wdt_stop(void) static inline void ks8695_wdt_start(void) { unsigned long tmcon; - unsigned long tval = wdt_time * CLOCK_TICK_RATE; + unsigned long tval = wdt_time * KS8695_CLOCK_RATE; spin_lock(&ks8695_lock); /* disable timer0 */ @@ -103,7 +117,7 @@ static inline void ks8695_wdt_reload(void) static int ks8695_wdt_settimeout(int new_time) { /* - * All counting occurs at SLOW_CLOCK / 128 = 0.256 Hz + * All counting occurs at KS8695_CLOCK_RATE / 128 = 0.256 Hz * * Since WDV is a 16-bit counter, the maximum period is * 65536 / 0.256 = 256 seconds. @@ -145,7 +159,7 @@ static int ks8695_wdt_close(struct inode *inode, struct file *file) return 0; } -static struct watchdog_info ks8695_wdt_info = { +static const struct watchdog_info ks8695_wdt_info = { .identity = "ks8695 watchdog", .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING, }; @@ -221,7 +235,7 @@ static struct miscdevice ks8695wdt_miscdev = { .fops = &ks8695wdt_fops, }; -static int __init ks8695wdt_probe(struct platform_device *pdev) +static int ks8695wdt_probe(struct platform_device *pdev) { int res; @@ -233,12 +247,12 @@ static int __init ks8695wdt_probe(struct platform_device *pdev) if (res) return res; - printk(KERN_INFO "KS8695 Watchdog Timer enabled (%d seconds%s)\n", - wdt_time, nowayout ? ", nowayout" : ""); + pr_info("KS8695 Watchdog Timer enabled (%d seconds%s)\n", + wdt_time, nowayout ? ", nowayout" : ""); return 0; } -static int __exit ks8695wdt_remove(struct platform_device *pdev) +static int ks8695wdt_remove(struct platform_device *pdev) { int res; @@ -276,7 +290,7 @@ static int ks8695wdt_resume(struct platform_device *pdev) static struct platform_driver ks8695wdt_driver = { .probe = ks8695wdt_probe, - .remove = __exit_p(ks8695wdt_remove), + .remove = ks8695wdt_remove, .shutdown = ks8695wdt_shutdown, .suspend = ks8695wdt_suspend, .resume = ks8695wdt_resume, @@ -288,13 +302,12 @@ static struct platform_driver ks8695wdt_driver = { static int __init ks8695_wdt_init(void) { - spin_lock_init(&ks8695_lock); /* Check that the heartbeat value is within range; if not reset to the default */ if (ks8695_wdt_settimeout(wdt_time)) { ks8695_wdt_settimeout(WDT_DEFAULT_TIME); - pr_info("ks8695_wdt: wdt_time value must be 1 <= wdt_time <= %i, using %d\n", - wdt_time, WDT_MAX_TIME); + pr_info("ks8695_wdt: wdt_time value must be 1 <= wdt_time <= %i" + ", using %d\n", wdt_time, WDT_MAX_TIME); } return platform_driver_register(&ks8695wdt_driver); } @@ -310,5 +323,4 @@ module_exit(ks8695_wdt_exit); MODULE_AUTHOR("Andrew Victor"); MODULE_DESCRIPTION("Watchdog driver for KS8695"); MODULE_LICENSE("GPL"); -MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); MODULE_ALIAS("platform:ks8695_wdt"); |