rtc: ds1307: add temperature sensor support for ds3231

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DS3231 has the temperature registers with a resolution of 0.25
degree celsius.  This enables to get the value through hwmon.

	# cat /sys/class/i2c-adapter/i2c-2/2-0068/hwmon/hwmon0/temp1_input
	21000

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

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Akinobu Mita 2016-01-25 00:22:16 +09:00 • committed by Alexandre Belloni

parent 8bc2a40730

commit 445c02076f

2 changed files with 97 additions and 0 deletions

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9

drivers/rtc/Kconfig

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88

drivers/rtc/rtc-ds1307.c

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