diff options
| author | Wim Van Sebroeck <wim@iguana.be> | 2012-03-23 11:48:22 +0100 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2012-03-27 20:16:13 +0200 |
| commit | b92c803ec61de59e6e4ab9b2748d8e633cec3f08 (patch) | |
| tree | 58af22b2fe89531cef7797a86c3de2bba7369b46 /drivers/watchdog/txx9wdt.c | |
| parent | d6245842384c9289d4f778555fd8be729e0b0306 (diff) | |
watchdog: txx9wdt: fix timeout
timeout should be an unsigned int.
Set the timeout value properly in the watchdog_device struct so that
we don't get an faulty values for the WDIOC_GETTIMEOUT ioctl call.
Add check to see that timeout is a valid parameter after it is loaded
as a module.
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Diffstat (limited to 'drivers/watchdog/txx9wdt.c')
| -rw-r--r-- | drivers/watchdog/txx9wdt.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/watchdog/txx9wdt.c b/drivers/watchdog/txx9wdt.c index 53f1b17429c..98e16373e64 100644 --- a/drivers/watchdog/txx9wdt.c +++ b/drivers/watchdog/txx9wdt.c @@ -22,10 +22,13 @@ #include <linux/io.h> #include <asm/txx9tmr.h> +#define WD_TIMER_CCD 7 /* 1/256 */ +#define WD_TIMER_CLK (clk_get_rate(txx9_imclk) / (2 << WD_TIMER_CCD)) +#define WD_MAX_TIMEOUT ((0xffffffff >> (32 - TXX9_TIMER_BITS)) / WD_TIMER_CLK) #define TIMER_MARGIN 60 /* Default is 60 seconds */ -static int timeout = TIMER_MARGIN; /* in seconds */ -module_param(timeout, int, 0); +static unsigned int timeout = TIMER_MARGIN; /* in seconds */ +module_param(timeout, uint, 0); MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. " "(0<timeout<((2^" __MODULE_STRING(TXX9_TIMER_BITS) ")/(IMCLK/256)), " @@ -37,10 +40,6 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started " "(default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); -#define WD_TIMER_CCD 7 /* 1/256 */ -#define WD_TIMER_CLK (clk_get_rate(txx9_imclk) / (2 << WD_TIMER_CCD)) -#define WD_MAX_TIMEOUT ((0xffffffff >> (32 - TXX9_TIMER_BITS)) / WD_TIMER_CLK) - static struct txx9_tmr_reg __iomem *txx9wdt_reg; static struct clk *txx9_imclk; static DEFINE_SPINLOCK(txx9_lock); @@ -56,7 +55,7 @@ static int txx9wdt_ping(struct watchdog_device *wdt_dev) static int txx9wdt_start(struct watchdog_device *wdt_dev) { spin_lock(&txx9_lock); - __raw_writel(WD_TIMER_CLK * timeout, &txx9wdt_reg->cpra); + __raw_writel(WD_TIMER_CLK * wdt_dev->timeout, &txx9wdt_reg->cpra); __raw_writel(WD_TIMER_CCD, &txx9wdt_reg->ccdr); __raw_writel(0, &txx9wdt_reg->tisr); /* clear pending interrupt */ __raw_writel(TXx9_TMTCR_TCE | TXx9_TMTCR_CCDE | TXx9_TMTCR_TMODE_WDOG, @@ -79,7 +78,7 @@ static int txx9wdt_stop(struct watchdog_device *wdt_dev) static int txx9wdt_set_timeout(struct watchdog_device *wdt_dev, unsigned int new_timeout) { - timeout = new_timeout; + wdt_dev->timeout = new_timeout; txx9wdt_stop(wdt_dev); txx9wdt_start(wdt_dev); return 0; @@ -128,6 +127,9 @@ static int __init txx9wdt_probe(struct platform_device *dev) goto exit; } + if (timeout < 1 || timeout > WD_MAX_TIMEOUT) + timeout = TIMER_MARGIN; + txx9wdt.timeout = timeout; txx9wdt.min_timeout = 1; txx9wdt.max_timeout = WD_MAX_TIMEOUT; watchdog_set_nowayout(&txx9wdt, nowayout); |