redonkable/remarkable-linux
redonkable/remarkable-linux
1
0
Fork 0
Code Releases Activity

watchdog: davinci: add GET_TIMELEFT option support

Browse source 
Currently, the davinci watchdog can be read while counting,
so we can add ability to report the remaining time before
the system will reboot.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Ivan Khoronzhuk 2013-12-04 21:39:28 +02:00 committed by Wim Van Sebroeck
parent 6d9a6cf5c6
commit a771994901
1 changed files with 26 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

26
drivers/watchdog/davinci_wdt.c
View file

@ -116,6 +116,31 @@ static int davinci_wdt_ping(struct watchdog_device *wdd)
return 0;
}
static unsigned int davinci_wdt_get_timeleft(struct watchdog_device *wdd)
{
u64 timer_counter;
unsigned long freq;
u32 val;
struct davinci_wdt_device *davinci_wdt = watchdog_get_drvdata(wdd);
/* if timeout has occured then return 0 */
val = ioread32(davinci_wdt->base + WDTCR);
if (val & WDFLAG)
return 0;
freq = clk_get_rate(davinci_wdt->clk);
if (!freq)
return 0;
timer_counter = ioread32(davinci_wdt->base + TIM12);
timer_counter |= ((u64)ioread32(davinci_wdt->base + TIM34) << 32);
do_div(timer_counter, freq);
return wdd->timeout - timer_counter;
}
static const struct watchdog_info davinci_wdt_info = {
.options = WDIOF_KEEPALIVEPING,
.identity = "DaVinci Watchdog",
@ -126,6 +151,7 @@ static const struct watchdog_ops davinci_wdt_ops = {
.start = davinci_wdt_start,
.stop = davinci_wdt_ping,
.ping = davinci_wdt_ping,
.get_timeleft = davinci_wdt_get_timeleft,
};
static int davinci_wdt_probe(struct platform_device *pdev)