* [PATCH RESEND] watchdog: sama5d4: fix WDD value to be always set to max
@ 2019-07-09 7:26 Eugen.Hristev
2019-07-09 12:48 ` Guenter Roeck
0 siblings, 1 reply; 2+ messages in thread
From: Eugen.Hristev @ 2019-07-09 7:26 UTC (permalink / raw)
To: linux-kernel, linux-arm-kernel, wim, linux-watchdog, linux
Cc: Nicolas.Ferre, Eugen.Hristev
From: Eugen Hristev <eugen.hristev@microchip.com>
WDD value must be always set to max (0xFFF) otherwise the hardware
block will reset the board on the first ping of the watchdog.
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
---
drivers/watchdog/sama5d4_wdt.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/watchdog/sama5d4_wdt.c b/drivers/watchdog/sama5d4_wdt.c
index b8da1bf..5afe10c 100644
--- a/drivers/watchdog/sama5d4_wdt.c
+++ b/drivers/watchdog/sama5d4_wdt.c
@@ -110,9 +110,7 @@ static int sama5d4_wdt_set_timeout(struct watchdog_device *wdd,
u32 value = WDT_SEC2TICKS(timeout);
wdt->mr &= ~AT91_WDT_WDV;
- wdt->mr &= ~AT91_WDT_WDD;
wdt->mr |= AT91_WDT_SET_WDV(value);
- wdt->mr |= AT91_WDT_SET_WDD(value);
/*
* WDDIS has to be 0 when updating WDD/WDV. The datasheet states: When
@@ -248,7 +246,7 @@ static int sama5d4_wdt_probe(struct platform_device *pdev)
timeout = WDT_SEC2TICKS(wdd->timeout);
- wdt->mr |= AT91_WDT_SET_WDD(timeout);
+ wdt->mr |= AT91_WDT_SET_WDD(WDT_SEC2TICKS(MAX_WDT_TIMEOUT));
wdt->mr |= AT91_WDT_SET_WDV(timeout);
ret = sama5d4_wdt_init(wdt);
--
2.7.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH RESEND] watchdog: sama5d4: fix WDD value to be always set to max
2019-07-09 7:26 [PATCH RESEND] watchdog: sama5d4: fix WDD value to be always set to max Eugen.Hristev
@ 2019-07-09 12:48 ` Guenter Roeck
0 siblings, 0 replies; 2+ messages in thread
From: Guenter Roeck @ 2019-07-09 12:48 UTC (permalink / raw)
To: Eugen.Hristev, linux-kernel, linux-arm-kernel, wim, linux-watchdog
Cc: Nicolas.Ferre
On 7/9/19 12:26 AM, Eugen.Hristev@microchip.com wrote:
> From: Eugen Hristev <eugen.hristev@microchip.com>
>
> WDD value must be always set to max (0xFFF) otherwise the hardware
> block will reset the board on the first ping of the watchdog.
>
> Reviewed-by: Guenter Roeck <linux@roeck-us.net>
> Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
This patch is already in -next as of today.
Guenter
> ---
> drivers/watchdog/sama5d4_wdt.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/watchdog/sama5d4_wdt.c b/drivers/watchdog/sama5d4_wdt.c
> index b8da1bf..5afe10c 100644
> --- a/drivers/watchdog/sama5d4_wdt.c
> +++ b/drivers/watchdog/sama5d4_wdt.c
> @@ -110,9 +110,7 @@ static int sama5d4_wdt_set_timeout(struct watchdog_device *wdd,
> u32 value = WDT_SEC2TICKS(timeout);
>
> wdt->mr &= ~AT91_WDT_WDV;
> - wdt->mr &= ~AT91_WDT_WDD;
> wdt->mr |= AT91_WDT_SET_WDV(value);
> - wdt->mr |= AT91_WDT_SET_WDD(value);
>
> /*
> * WDDIS has to be 0 when updating WDD/WDV. The datasheet states: When
> @@ -248,7 +246,7 @@ static int sama5d4_wdt_probe(struct platform_device *pdev)
>
> timeout = WDT_SEC2TICKS(wdd->timeout);
>
> - wdt->mr |= AT91_WDT_SET_WDD(timeout);
> + wdt->mr |= AT91_WDT_SET_WDD(WDT_SEC2TICKS(MAX_WDT_TIMEOUT));
> wdt->mr |= AT91_WDT_SET_WDV(timeout);
>
> ret = sama5d4_wdt_init(wdt);
>
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2019-07-09 12:48 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-07-09 7:26 [PATCH RESEND] watchdog: sama5d4: fix WDD value to be always set to max Eugen.Hristev
2019-07-09 12:48 ` Guenter Roeck
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).