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authorViresh Kumar <viresh.kumar@st.com>2012-03-21 12:55:03 -0700
committerLen Brown <len.brown@intel.com>2012-03-22 01:06:43 -0400
commitde716e32e61fae5d1f0d000008d3f641cec5c9dd (patch)
treeca4d94ded63a6a3da3313dd54e16465f60d65659 /drivers
parent6a92c36688bd6d8e68e19ca9b5e41e8197921b59 (diff)
downloadop-kernel-dev-de716e32e61fae5d1f0d000008d3f641cec5c9dd.zip
op-kernel-dev-de716e32e61fae5d1f0d000008d3f641cec5c9dd.tar.gz
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/thermal/spear_thermal.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/thermal/spear_thermal.c b/drivers/thermal/spear_thermal.c
index 880bf28..be94413 100644
--- a/drivers/thermal/spear_thermal.c
+++ b/drivers/thermal/spear_thermal.c
@@ -46,7 +46,7 @@ static inline int thermal_get_temp(struct thermal_zone_device *thermal,
* Data are ready to be read after 628 usec from POWERDOWN signal
* (PDN) = 1
*/
- *temp = (readl(stdev->thermal_base) & 0x7F) * MD_FACTOR;
+ *temp = (readl_relaxed(stdev->thermal_base) & 0x7F) * MD_FACTOR;
return 0;
}
@@ -63,8 +63,8 @@ static int spear_thermal_suspend(struct device *dev)
unsigned int actual_mask = 0;
/* Disable SPEAr Thermal Sensor */
- actual_mask = readl(stdev->thermal_base);
- writel(actual_mask & ~stdev->flags, stdev->thermal_base);
+ actual_mask = readl_relaxed(stdev->thermal_base);
+ writel_relaxed(actual_mask & ~stdev->flags, stdev->thermal_base);
clk_disable(stdev->clk);
dev_info(dev, "Suspended.\n");
@@ -87,8 +87,8 @@ static int spear_thermal_resume(struct device *dev)
}
/* Enable SPEAr Thermal Sensor */
- actual_mask = readl(stdev->thermal_base);
- writel(actual_mask | stdev->flags, stdev->thermal_base);
+ actual_mask = readl_relaxed(stdev->thermal_base);
+ writel_relaxed(actual_mask | stdev->flags, stdev->thermal_base);
dev_info(dev, "Resumed.\n");
@@ -145,7 +145,7 @@ static int spear_thermal_probe(struct platform_device *pdev)
}
stdev->flags = pdata->thermal_flags;
- writel(stdev->flags, stdev->thermal_base);
+ writel_relaxed(stdev->flags, stdev->thermal_base);
spear_thermal = thermal_zone_device_register("spear_thermal", 0,
stdev, &ops, 0, 0, 0, 0);
@@ -180,8 +180,8 @@ static int spear_thermal_exit(struct platform_device *pdev)
platform_set_drvdata(pdev, NULL);
/* Disable SPEAr Thermal Sensor */
- actual_mask = readl(stdev->thermal_base);
- writel(actual_mask & ~stdev->flags, stdev->thermal_base);
+ actual_mask = readl_relaxed(stdev->thermal_base);
+ writel_relaxed(actual_mask & ~stdev->flags, stdev->thermal_base);
clk_disable(stdev->clk);
clk_put(stdev->clk);
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