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