thermal/spear_thermal: 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: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
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@ -46,7 +46,7 @@ static inline int thermal_get_temp(struct thermal_zone_device *thermal,
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* Data are ready to be read after 628 usec from POWERDOWN signal
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* Data are ready to be read after 628 usec from POWERDOWN signal
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* (PDN) = 1
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* (PDN) = 1
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*/
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*/
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*temp = (readl(stdev->thermal_base) & 0x7F) * MD_FACTOR;
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*temp = (readl_relaxed(stdev->thermal_base) & 0x7F) * MD_FACTOR;
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return 0;
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return 0;
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}
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}
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@ -63,8 +63,8 @@ static int spear_thermal_suspend(struct device *dev)
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unsigned int actual_mask = 0;
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unsigned int actual_mask = 0;
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/* Disable SPEAr Thermal Sensor */
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/* Disable SPEAr Thermal Sensor */
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actual_mask = readl(stdev->thermal_base);
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actual_mask = readl_relaxed(stdev->thermal_base);
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writel(actual_mask & ~stdev->flags, stdev->thermal_base);
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writel_relaxed(actual_mask & ~stdev->flags, stdev->thermal_base);
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clk_disable(stdev->clk);
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clk_disable(stdev->clk);
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dev_info(dev, "Suspended.\n");
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dev_info(dev, "Suspended.\n");
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@ -87,8 +87,8 @@ static int spear_thermal_resume(struct device *dev)
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}
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}
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/* Enable SPEAr Thermal Sensor */
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/* Enable SPEAr Thermal Sensor */
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actual_mask = readl(stdev->thermal_base);
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actual_mask = readl_relaxed(stdev->thermal_base);
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writel(actual_mask | stdev->flags, stdev->thermal_base);
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writel_relaxed(actual_mask | stdev->flags, stdev->thermal_base);
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dev_info(dev, "Resumed.\n");
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dev_info(dev, "Resumed.\n");
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@ -145,7 +145,7 @@ static int spear_thermal_probe(struct platform_device *pdev)
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}
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}
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stdev->flags = pdata->thermal_flags;
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stdev->flags = pdata->thermal_flags;
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writel(stdev->flags, stdev->thermal_base);
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writel_relaxed(stdev->flags, stdev->thermal_base);
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spear_thermal = thermal_zone_device_register("spear_thermal", 0,
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spear_thermal = thermal_zone_device_register("spear_thermal", 0,
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stdev, &ops, 0, 0, 0, 0);
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stdev, &ops, 0, 0, 0, 0);
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@ -180,8 +180,8 @@ static int spear_thermal_exit(struct platform_device *pdev)
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platform_set_drvdata(pdev, NULL);
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platform_set_drvdata(pdev, NULL);
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/* Disable SPEAr Thermal Sensor */
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/* Disable SPEAr Thermal Sensor */
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actual_mask = readl(stdev->thermal_base);
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actual_mask = readl_relaxed(stdev->thermal_base);
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writel(actual_mask & ~stdev->flags, stdev->thermal_base);
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writel_relaxed(actual_mask & ~stdev->flags, stdev->thermal_base);
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clk_disable(stdev->clk);
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clk_disable(stdev->clk);
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clk_put(stdev->clk);
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clk_put(stdev->clk);
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