ENGR00223236-2 [MX6]Change the temperature range to -40C ~ 125C

Previous temperature range is -25C ~ 125C, according to latest
datasheet, change it to -40C to 125C.

Signed-off-by: Anson Huang <b20788@freescale.com>

diff --git a/drivers/mxc/thermal/thermal.c b/drivers/mxc/thermal/thermal.c
index 6f3c7a912170a3c709c63ee6b076ac791f864f52..f0e961f6109d81aa5d1dd8dc0f9f72835aff2b80 100644 (file)
--- a/drivers/mxc/thermal/thermal.c
+++ b/drivers/mxc/thermal/thermal.c
@@ -132,15 +132,15 @@
 #define KELVIN_TO_CEL(t, off) (((t) - (off)))
 #define CEL_TO_KELVIN(t, off) (((t) + (off)))
 #define DEFAULT_RATIO                  145
-#define DEFAULT_N25C                   1541
-#define REG_VALUE_TO_CEL(ratio, raw) ((raw_n25c - raw) * 100 / ratio - 25)
+#define DEFAULT_N40C                   1563
+#define REG_VALUE_TO_CEL(ratio, raw) ((raw_n40c - raw) * 100 / ratio - 40)
 #define ANATOP_DEBUG                   false
 #define THERMAL_FUSE_NAME              "/sys/fsl_otp/HW_OCOTP_ANA1"
 
 /* variables */
 unsigned long anatop_base;
 unsigned int ratio;
-unsigned int raw_25c, raw_hot, hot_temp, raw_n25c, raw_125c, raw_critical;
+unsigned int raw_25c, raw_hot, hot_temp, raw_n40c, raw_125c, raw_critical;
 static struct clk *pll3_clk;
 static bool full_run = true;
 static bool suspend_flag;
@@ -320,10 +320,9 @@ static int anatop_thermal_get_temp(struct thermal_zone_device *thermal,
 
        if (ANATOP_DEBUG)
                anatop_dump_temperature_register();
-
-       /* only the temp between -25C and 125C is valid, this
+       /* only the temp between -40C and 125C is valid, this
        is for save */
-       if (tmp <= raw_n25c && tmp >= raw_125c)
+       if (tmp <= raw_n40c && tmp >= raw_125c)
                tz->temperature = REG_VALUE_TO_CEL(ratio, tmp);
        else {
                printk(KERN_WARNING "Invalid temperature, force it to 25C\n");
@@ -848,7 +847,7 @@ static int anatop_thermal_counting_ratio(unsigned int fuse_data)
        hot_temp = fuse_data & 0xff;
 
        ratio = ((raw_25c - raw_hot) * 100) / (hot_temp - 25);
-       raw_n25c = raw_25c + ratio / 2;
+       raw_n40c = raw_25c + (13 * ratio) / 20;
        raw_125c = raw_25c - ratio;
        /* Init default critical temp to set alarm */
        raw_critical = raw_25c - ratio * (KELVIN_TO_CEL(TEMP_CRITICAL, KELVIN_OFFSET) - 25) / 100;
@@ -913,7 +912,7 @@ static int anatop_thermal_probe(struct platform_device *pdev)
                dev_err(&pdev->dev, "failed to remap anatop calibration data address!\n");
                goto anatop_failed;
        }
-       raw_n25c = DEFAULT_N25C;
+       raw_n40c = DEFAULT_N40C;
        /* use calibration data to get ratio */
        anatop_thermal_counting_ratio(__raw_readl(calibration_addr));