tree 18262d9099432d76b6598453783c69ea25d77c8a
parent 00c9329ebe2d19a13afd86ba75218f868f2788ba
author Zhuang Yuyao <mlistz@gmail.com> 1460938902 +0900
committer Alexandre Belloni <alexandre.belloni@free-electrons.com> 1461273659 +0200

rtc: ds1307: ds3231 temperature s16 overflow

while retrieving temperature from ds3231, the result may be overflow
since s16 is too small for a multiplication with 250.

ie. if temp_buf[0] == 0x2d, the result (s16 temp) will be negative.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Tested-by: Michael Tatarinov <kukabu@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>