diff options
| author | Peng Fan <peng.fan@nxp.com> | 2017-04-18 20:41:53 +0800 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2017-05-18 11:23:31 +0200 |
| commit | 80512547ba3706679a039ae823bb957af422580e (patch) | |
| tree | 29b77e17504a404b17529c40a1c24919445c20e6 /drivers/thermal | |
| parent | 4fac41716840cb235a740d4d220f46a545a7632d (diff) | |
thermal: imx: fix calculation
Fix calculation. do_div can not handle negative values.
Use div_s64_rem to handle the calculation.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/imx_thermal.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c index b159464d82..d137bfdca0 100644 --- a/drivers/thermal/imx_thermal.c +++ b/drivers/thermal/imx_thermal.c @@ -16,6 +16,7 @@ #include <dm.h> #include <errno.h> #include <malloc.h> +#include <linux/math64.h> #include <thermal.h> #include <imx_thermal.h> @@ -55,8 +56,9 @@ static int read_cpu_temperature(struct udevice *dev) struct thermal_data *priv = dev_get_priv(dev); u32 fuse = priv->fuse; int t1, n1; - u64 c1, c2; - u64 temp64; + s64 c1, c2; + s64 temp64; + s32 rem; /* * Sensor data layout: @@ -88,7 +90,7 @@ static int read_cpu_temperature(struct udevice *dev) */ temp64 = FACTOR0; temp64 *= 1000000; - do_div(temp64, FACTOR1 * n1 - FACTOR2); + temp64 = div_s64_rem(temp64, FACTOR1 * n1 - FACTOR2, &rem); c1 = temp64; c2 = n1 * c1 + 1000000 * t1; @@ -123,7 +125,7 @@ static int read_cpu_temperature(struct udevice *dev) writel(TEMPSENSE0_FINISHED, &anatop->tempsense0_clr); /* Tmeas = (c2 - Nmeas * c1 + OFFSET) / 1000000 */ - temperature = lldiv(c2 - n_meas * c1 + OFFSET, 1000000); + temperature = div_s64_rem(c2 - n_meas * c1 + OFFSET, 1000000, &rem); /* power down anatop thermal sensor */ writel(TEMPSENSE0_POWER_DOWN, &anatop->tempsense0_set); |