diff options
| author | Luiz Otavio O Souza <loos@FreeBSD.org> | 2015-02-28 19:02:44 +0000 |
|---|---|---|
| committer | Luiz Otavio O Souza <loos@FreeBSD.org> | 2015-02-28 19:02:44 +0000 |
| commit | befcc3e26ba81cce13a3f149cc974c7f6dfbae57 (patch) | |
| tree | ec88c848cd55789a18ee143983d353ff052525c0 /sys/amd64 | |
| parent | 18daa0ee9adbfb92822e2843737ea4a29b8fd0e5 (diff) | |
Add a driver for the Maxim DS3231 a low-cost, extremely accurate (+-2PPM)
I2C real-time clock (RTC).
The DS3231 has an integrated temperature-compensated crystal oscillator
(TXCO) and crystal.
DS3231 has a temperature sensor, an independent 32kHz output (which can be
turned on and off by the driver) and another output that can be used as
interrupt for alarms or as a second square-wave output, which frequency and
operation mode can be set by driver sysctl(8) knobs.
Differential Revision: https://reviews.freebsd.org/D1016
Reviewed by: ian, rpaulo
Tested on: Raspberry pi model B
Notes
svn path=/head/; revision=279399
Diffstat (limited to 'sys/amd64')
0 files changed, 0 insertions, 0 deletions