1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
Allow watchdog to set its iterrupt as pending when it is configured
for timer mode (in other words, allow emitting interrupt).
Also add macros for all Watchdog Control Register flags.
Signed-off-by: Vitaly Kuzmichev <vkuzmichev@mvista.com>
---
arch/arm/include/asm/smp_twd.h | 6 ++++++
drivers/watchdog/mpcore_wdt.c | 15 +++++++++++----
2 files changed, 17 insertions(+), 4 deletions(-)
--- a/arch/arm/include/asm/smp_twd.h
+++ b/arch/arm/include/asm/smp_twd.h
@@ -18,6 +18,12 @@
#define TWD_TIMER_CONTROL_PERIODIC (1 << 1)
#define TWD_TIMER_CONTROL_IT_ENABLE (1 << 2)
+#define TWD_WDOG_CONTROL_ENABLE (1 << 0)
+#define TWD_WDOG_CONTROL_PERIODIC (1 << 1)
+#define TWD_WDOG_CONTROL_IT_ENABLE (1 << 2)
+#define TWD_WDOG_CONTROL_TIMER_MODE (0 << 3)
+#define TWD_WDOG_CONTROL_WATCHDOG_MODE (1 << 3)
+
#include <linux/ioport.h>
struct twd_local_timer {
--- a/drivers/watchdog/mpcore_wdt.c
+++ b/drivers/watchdog/mpcore_wdt.c
@@ -120,18 +120,25 @@ static void mpcore_wdt_stop(struct mpcor
static void mpcore_wdt_start(struct mpcore_wdt *wdt)
{
+ u32 mode;
+
dev_info(wdt->dev, "enabling watchdog\n");
/* This loads the count register but does NOT start the count yet */
mpcore_wdt_keepalive(wdt);
+ /* Setup watchdog - prescale=256, enable=1 */
+ mode = (255 << 8) | TWD_WDOG_CONTROL_ENABLE;
+
if (mpcore_noboot) {
- /* Enable watchdog - prescale=256, watchdog mode=0, enable=1 */
- writel(0x0000FF01, wdt->base + TWD_WDOG_CONTROL);
+ /* timer mode, send interrupt */
+ mode |= TWD_WDOG_CONTROL_TIMER_MODE |
+ TWD_WDOG_CONTROL_IT_ENABLE;
} else {
- /* Enable watchdog - prescale=256, watchdog mode=1, enable=1 */
- writel(0x0000FF09, wdt->base + TWD_WDOG_CONTROL);
+ /* watchdog mode */
+ mode |= TWD_WDOG_CONTROL_WATCHDOG_MODE;
}
+ writel(mode, wdt->base + TWD_WDOG_CONTROL);
}
static int mpcore_wdt_set_heartbeat(int t)
|
