thermal: exynos: Miscellaneous fixes to support falling threshold interrupt

Below fixes are done to support falling threshold interrupt,
* Falling interrupt status macro corrected according to exynos5 data sheet.
* The get trend function modified to calculate trip temperature correctly.
* The clearing of interrupt status in the isr is now done after handling
  the event that caused the interrupt.

Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

1 files changed, 11 insertions, 6 deletions

diff --git a/drivers/thermal/exynos_thermal.c b/drivers/thermal/exynos_thermal.c
index 327102a4596a..cd71e24194b1 100644
--- a/drivers/thermal/exynos_thermal.c
+++ b/drivers/thermal/exynos_thermal.c
@@ -82,7 +82,7 @@
 
 #define EXYNOS_TRIMINFO_RELOAD          0x1
 #define EXYNOS_TMU_CLEAR_RISE_INT       0x111
-#define EXYNOS_TMU_CLEAR_FALL_INT       (0x111 << 16)
+#define EXYNOS_TMU_CLEAR_FALL_INT       (0x111 << 12)
 #define EXYNOS_MUX_ADDR_VALUE           6
 #define EXYNOS_MUX_ADDR_SHIFT           20
 #define EXYNOS_TMU_TRIP_MODE_SHIFT      13
@@ -370,7 +370,14 @@ static int exynos_get_temp(struct thermal_zone_device *thermal,
 static int exynos_get_trend(struct thermal_zone_device *thermal,
                         int trip, enum thermal_trend *trend)
 {
-        if (thermal->temperature >= trip)
+        int ret;
+        unsigned long trip_temp;
+
+        ret = exynos_get_trip_temp(thermal, trip, &trip_temp);
+        if (ret < 0)
+                return ret;
+
+        if (thermal->temperature >= trip_temp)
                 *trend = THERMAL_TREND_RAISING;
         else
                 *trend = THERMAL_TREND_DROPPING;
@@ -705,20 +712,18 @@ static void exynos_tmu_work(struct work_struct *work)
         struct exynos_tmu_data *data = container_of(work,
                         struct exynos_tmu_data, irq_work);
 
+        exynos_report_trigger();
         mutex_lock(&data->lock);
         clk_enable(data->clk);
-
-
         if (data->soc == SOC_ARCH_EXYNOS)
                 writel(EXYNOS_TMU_CLEAR_RISE_INT,
                                 data->base + EXYNOS_TMU_REG_INTCLEAR);
         else
                 writel(EXYNOS4210_TMU_INTCLEAR_VAL,
                                 data->base + EXYNOS_TMU_REG_INTCLEAR);
-
         clk_disable(data->clk);
         mutex_unlock(&data->lock);
-        exynos_report_trigger();
+
         enable_irq(data->irq);
 }