Handle rtc chip on i2c bus

Dietrich — Sat, 01 Apr 2006 07:34:20 GMT

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Dec 6, 2005, 3:30 PM

Post #1 of 2 (42 views)
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[ColdFire] Handle rtc chip on i2c bus Can't Post

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Hi:
For 5475 EVB board, there is a rv5c387 rtc chip. In rv5c387-rtc.c, the
"init" function calls "i2c_add_driver" to add an i2c driver and
"misc_register" to add a misc driver.

When I open the misc driver to read/write to the rtc chip, the read/write
functions returns error. I am confused here because there are 2 drivers for
1 rtc chip. Which driver should I open to access the chip?

Thanks,

Shiyuan
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Dec 6, 2005, 5:15 PM

Post #2 of 2 (42 views)
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Re: [ColdFire] Handle rtc chip on i2c bus [In reply to] Can't Post

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>Hi:
>For 5475 EVB board, there is a rv5c387 rtc chip. In rv5c387-rtc.c, the
>"init" function calls "i2c_add_driver" to add an i2c driver and
>"misc_register" to add a misc driver.
>
>When I open the misc driver to read/write to the rtc chip, the read/write
>functions returns error. I am confused here because there are 2 drivers for
>1 rtc chip. Which driver should I open to access the chip?

Logic's BSP already has support for the RTC on the eval board, using
the I2C driver. It supplies a /dev/rtc driver for other
utilities(such as hwclock) to access the rtc.

--
Peter Barada

Message Edited by Dietrich on 04-03-2006 10:56 AM

Message Edited by Dietrich on 04-04-2006 09:13 PM

ColdFire/68K Microcontrollers and ProcessorsのトピックHandle rtc chip on i2c bus

Handle rtc chip on i2c bus