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watchdog: ath79_wdt: flush register writes 

The watchdog register writes required to have a flush
in order to commit the values to the register. Without
the flush, the driver not function correctly on AR934X
SoCs.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Acked-by: Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Gabor Juhos 2011-12-23 19:25:42 +01:00 committed by Wim Van Sebroeck
parent 60daac4a90
commit 86955e2bcb
1 changed files with 6 additions and 0 deletions
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6
drivers/watchdog/ath79_wdt.c
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@ -68,17 +68,23 @@ static int max_timeout;
static inline void ath79_wdt_keepalive(void) static inline void ath79_wdt_keepalive(void)
{ {
ath79_reset_wr(AR71XX_RESET_REG_WDOG, wdt_freq * timeout); ath79_reset_wr(AR71XX_RESET_REG_WDOG, wdt_freq * timeout);
/* flush write */
ath79_reset_rr(AR71XX_RESET_REG_WDOG);
} }
static inline void ath79_wdt_enable(void) static inline void ath79_wdt_enable(void)
{ {
ath79_wdt_keepalive(); ath79_wdt_keepalive();
ath79_reset_wr(AR71XX_RESET_REG_WDOG_CTRL, WDOG_CTRL_ACTION_FCR); ath79_reset_wr(AR71XX_RESET_REG_WDOG_CTRL, WDOG_CTRL_ACTION_FCR);
/* flush write */
ath79_reset_rr(AR71XX_RESET_REG_WDOG_CTRL);
} }
static inline void ath79_wdt_disable(void) static inline void ath79_wdt_disable(void)
{ {
ath79_reset_wr(AR71XX_RESET_REG_WDOG_CTRL, WDOG_CTRL_ACTION_NONE); ath79_reset_wr(AR71XX_RESET_REG_WDOG_CTRL, WDOG_CTRL_ACTION_NONE);
/* flush write */
ath79_reset_rr(AR71XX_RESET_REG_WDOG_CTRL);
} }
static int ath79_wdt_set_timeout(int val) static int ath79_wdt_set_timeout(int val)