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authorEzequiel Garcia <ezequiel.garcia@free-electrons.com>2014-03-15 15:17:58 -0300
committerWim Van Sebroeck <wim@iguana.be>2014-06-10 21:44:20 +0200
commiteba985e20c70d99a278c04ff5c492d90d53a20dd (patch)
treed02ad515840e6256f187bd8a75a3d409ffb86ca1 /drivers/watchdog/orion_wdt.c
parent92d4fc1a1f56a12fa09c92d8c89873509a8012c9 (diff)
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watchdog: orion: Remove unneeded atomic access
The RSTOUT register on the Armada 370 SoC variant is a dedicated register (not shared across orthogonal subsystems) and so it's not needed to write it atomically. Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Jason Cooper <jason@lakedaemon.net> Tested-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/orion_wdt.c')
-rw-r--r--drivers/watchdog/orion_wdt.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c
index 75f623f5e6c3..365d6cc53074 100644
--- a/drivers/watchdog/orion_wdt.c
+++ b/drivers/watchdog/orion_wdt.c
@@ -145,6 +145,7 @@ static int orion_wdt_ping(struct watchdog_device *wdt_dev)
static int armada370_start(struct watchdog_device *wdt_dev)
{
struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev);
+ u32 reg;
/* Set watchdog duration */
writel(dev->clk_rate * wdt_dev->timeout,
@@ -157,8 +158,10 @@ static int armada370_start(struct watchdog_device *wdt_dev)
atomic_io_modify(dev->reg + TIMER_CTRL, dev->data->wdt_enable_bit,
dev->data->wdt_enable_bit);
- atomic_io_modify(dev->rstout, dev->data->rstout_enable_bit,
- dev->data->rstout_enable_bit);
+ /* Enable reset on watchdog */
+ reg = readl(dev->rstout);
+ reg |= dev->data->rstout_enable_bit;
+ writel(reg, dev->rstout);
return 0;
}