The temperature calculation must be typecasted to keep the compiler
from sign extending a negative value prior to division.
This fixes an issue where if the CPU temperature is <0C it will get stuck
in the busywait loop until the CPU heats up to 0C.
Cc: Ye Li <b37...@freescale.com>
Cc: Jason Liu <r64...@freescale.com>
Signed-off-by: Tim Harvey <thar...@gateworks.com>
---
drivers/thermal/imx_thermal.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index 0d893c9..6d1ac97 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -115,7 +115,7 @@ static int read_cpu_temperature(struct udevice *dev)
writel(TEMPSENSE0_FINISHED, &anatop->tempsense0_clr);
/* milli_Tmeas = c2 - Nmeas * c1 */
- temperature = (c2 - n_meas * c1)/1000;
+ temperature = (long)(c2 - n_meas * c1)/1000;
/* power down anatop thermal sensor */
writel(TEMPSENSE0_POWER_DOWN, &anatop->tempsense0_set);
--
1.9.1
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