watchdog: sp805: replace readl/writel with lighter _relaxed variants

readl/writel versions for ARM contain memory barrier instruction for
synchronizing DMA buffers.  These are not required at least on this
module.  So use lighter _relaxed variants.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

1 files changed, 12 insertions, 12 deletions

diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c
index 3e4edda261d1..6e751573a2d1 100644
--- a/drivers/watchdog/sp805_wdt.c
+++ b/drivers/watchdog/sp805_wdt.c
@@ -113,10 +113,10 @@ static u32 wdt_timeleft(void)
         rate = clk_get_rate(wdt->clk);
 
         spin_lock(&wdt->lock);
-        load = readl(wdt->base + WDTVALUE);
+        load = readl_relaxed(wdt->base + WDTVALUE);
 
         /*If the interrupt is inactive then time left is WDTValue + WDTLoad. */
-        if (!(readl(wdt->base + WDTRIS) & INT_MASK))
+        if (!(readl_relaxed(wdt->base + WDTRIS) & INT_MASK))
                 load += wdt->load_val + 1;
         spin_unlock(&wdt->lock);
 
@@ -128,14 +128,14 @@ static void wdt_enable(void)
 {
         spin_lock(&wdt->lock);
 
-        writel(UNLOCK, wdt->base + WDTLOCK);
-        writel(wdt->load_val, wdt->base + WDTLOAD);
-        writel(INT_MASK, wdt->base + WDTINTCLR);
-        writel(INT_ENABLE | RESET_ENABLE, wdt->base + WDTCONTROL);
-        writel(LOCK, wdt->base + WDTLOCK);
+        writel_relaxed(UNLOCK, wdt->base + WDTLOCK);
+        writel_relaxed(wdt->load_val, wdt->base + WDTLOAD);
+        writel_relaxed(INT_MASK, wdt->base + WDTINTCLR);
+        writel_relaxed(INT_ENABLE | RESET_ENABLE, wdt->base + WDTCONTROL);
+        writel_relaxed(LOCK, wdt->base + WDTLOCK);
 
         /* Flush posted writes. */
-        readl(wdt->base + WDTLOCK);
+        readl_relaxed(wdt->base + WDTLOCK);
         spin_unlock(&wdt->lock);
 }
 
@@ -144,12 +144,12 @@ static void wdt_disable(void)
 {
         spin_lock(&wdt->lock);
 
-        writel(UNLOCK, wdt->base + WDTLOCK);
-        writel(0, wdt->base + WDTCONTROL);
-        writel(LOCK, wdt->base + WDTLOCK);
+        writel_relaxed(UNLOCK, wdt->base + WDTLOCK);
+        writel_relaxed(0, wdt->base + WDTCONTROL);
+        writel_relaxed(LOCK, wdt->base + WDTLOCK);
 
         /* Flush posted writes. */
-        readl(wdt->base + WDTLOCK);
+        readl_relaxed(wdt->base + WDTLOCK);
         spin_unlock(&wdt->lock);
 }