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RTC question

DISCUSSION Lanny DeVaney 2 participants 2 messages Apr 15, 2002 – Apr 16, 2002 MIPS

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#0 lore raw

I've used the NEW_TIME_C method to implement support for the Dallas 1501 RTC in my MIPS port . I now successfully read the hw clock, and the date program works, and I can change the time.

However, the hwclock program tells me that it can't access the Hardware Clock and tells me that /dev/rtc doesn't exist (although it actually does) when running hwclock --debug. Also, I see an oddity that may be related - ping reports zero (as in 0 msec) round trip times always. I configured CONFIG_RTC into the kernel, and checked the major, minor of /dev/rtc on my embedded ramdisk. Also, I don't see /proc/driver/rtc.

Is this normal behavior with NEW_TIME_C configurations? I've checked my rtc_get_time and rtc_set_time, ..., like I said, the 'date' program works, reading and writing to the clock.

Thanks,
Lanny DeVaney

#1 lore raw

Ralf has not checked in the higher-level RTC driver yet. You can either build a kernel from the linux-mips project on sourceforge.net, where the driver is included, or try to apply the outdated patch from

http://linux.junsun.net/patches/oss.sgi.com/submitted/011110.mips-rtc.011110.1900.patch

It was created on Nov 11, 2001.

Jun

Quoted 20 lines · Lanny DeVaney

I've used the NEW_TIME_C method to implement support for the Dallas 1501 RTC in my MIPS port . I now successfully read the hw clock, and the date program works, and I can change the time.

However, the hwclock program tells me that it can't access the Hardware Clock and tells me that /dev/rtc doesn't exist (although it actually does) when running hwclock --debug. Also, I see an oddity that may be related - ping reports zero (as in 0 msec) round trip times always. I configured CONFIG_RTC into the kernel, and checked the major, minor of /dev/rtc on my embedded ramdisk. Also, I don't see /proc/driver/rtc.

Is this normal behavior with NEW_TIME_C configurations? I've checked my rtc_get_time and rtc_set_time, ..., like I said, the 'date' program works, reading and writing to the clock.

Thanks,
Lanny DeVaney