rk3368: tsadc: add hw shut temp

if temp reached hw_shut_temp three times continuously, system would power off.

Signed-off-by: David Wu <wdc@rock-chips.com>

diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
index b3e42d88ee8a6f5b705cdd8c6af51f9b5080deb6..7767d880470ccd4e46a8997a166830bfd762fa6a 100755 (executable)
--- a/drivers/thermal/rockchip_thermal.c
+++ b/drivers/thermal/rockchip_thermal.c
@@ -28,6 +28,7 @@
 #include <linux/gpio.h>
 #include <linux/of_gpio.h>
 #include <linux/rockchip/common.h>
+#include <linux/reboot.h>
 #include <linux/scpi_protocol.h>
 #include "../../arch/arm/mach-rockchip/efuse.h"
 
@@ -123,6 +124,7 @@ struct rockchip_thermal_data {
        bool logout;
        bool b_suspend;
        struct mutex suspend_lock;
+       int shuttemp_count;
 
        void __iomem *regs;
 
@@ -170,6 +172,8 @@ struct rockchip_thermal_data {
 #define TSADC_TEST
 #define TSADC_TEST_SAMPLE_TIME                 200/* msec */
 
+#define TSADC_MAX_HW_SHUT_TEMP_COUNT            3
+
 struct tsadc_table {
        unsigned long code;
        long temp;
@@ -749,6 +753,17 @@ int rockchip_tsadc_get_temp(int chn, int voltage)
                if(thermal->logout)
                        printk("cpu temp:[%d], voltage: %d\n"
                                , temp, voltage);
+
+               if (temp > thermal->hw_shut_temp / 1000)
+                       thermal->shuttemp_count++;
+               else
+                       thermal->shuttemp_count = 0;
+               if (thermal->shuttemp_count >= TSADC_MAX_HW_SHUT_TEMP_COUNT) {
+                       dev_err(&thermal->pdev->dev,
+                               "critical temperature reached(%ld C),shutting down\n",
+                                thermal->hw_shut_temp / 1000);
+                       orderly_poweroff(true);
+               }
        }
        mutex_unlock(&thermal->suspend_lock);