Commit a44908d7 authored by Jean Delvare's avatar Jean Delvare
Browse files

hwmon: (tmp421) Fix temperature conversions 



The low bits of temperature registers are status bits, they must be
masked out before converting the register values to temperatures.

Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
Tested-by: default avatarAndre Prendel <andre.prendel@gmx.de>
Cc: stable@kernel.org
parent 8d59582a

drivers/hwmon/tmp421.c

+4 −2
Original line number Diff line number Diff line
@@ -80,14 +80,16 @@ struct tmp421_data { 


static int temp_from_s16(s16 reg)

{

	int temp = reg;

	/* Mask out status bits */

	int temp = reg & ~0xf;



	return (temp * 1000 + 128) / 256;

}



static int temp_from_u16(u16 reg)

{

	int temp = reg;

	/* Mask out status bits */

	int temp = reg & ~0xf;



	/* Add offset for extended temperature range. */

	temp -= 64 * 256;

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