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imx: ventana: gsc: fix negative temperature readings

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The GSC Temperature sensor is a 2's complement value - adjust accordingly
for negative temperatures.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
This commit is contained in:
Tim Harvey 2016-05-24 11:03:51 -07:00 committed by Stefano Babic
parent efa7ed7236
commit 82a17e75da
1 changed files with 2 additions and 0 deletions
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2
board/gateworks/gw_ventana/gsc.c
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@ -71,6 +71,8 @@ static void read_hwmon(const char *name, uint reg, uint size)
puts("fRD\n");
} else {
ui = buf[0] | (buf[1]<<8) | (buf[2]<<16);
if (reg == GSC_HWMON_TEMP && ui > 0x8000)
ui -= 0xffff;
if (ui == 0xffffff)
puts("invalid\n");
else