Re: MPC5200 with PCF8563 RTC

Dear Jón,

in message [off-list ref] you wrote:

I am working on porting linux to a custom board based on MPC5200, which 
has a PCF8563 real time clock connected via i2c2_io and i2c2_clk pins.
It looks like this same combination is used on the PM520 board.

Indeed.

I am however having a more difficult time getting the linux kernel 
(linuxppc_2_4_devel from Denx) to work with PCF8563.  I get errors from 
rtc_rd( ), but I
can't understand why.  I have compared the i2c clock signals between 

It works fine on the PM520...

...

Calibrating delay loop (skipped)... 0.05 BogoMIPS

Seems to be misconfigured?

i2c-core.o: i2c core module version 2.6.1 (20010830)
i2c-dev.o: i2c /dev entries driver module version 2.6.1 (20010830)
i2c-proc.o version 2.6.1 (20010830)

^^^^^^^^^^^^^

Compare your configuration against the  PM520;  we  don't  have  this
enabled.

...

i2c-core.o: client [PCF8563] registered to adapter [PM520 I2C module #2 interface](pos. 0).

I don't see this either.

RTC switching kernel pointers

Before the i2c-algo-5xxx.o was initialized??

i2c-algo-5xxx.o: scanning bus PM520 I2C module #2 interface...
(0x00)(0x01)(0x02)(0x03)(0x04)(0x05)(0x06)(0x07)(0x08)(0x09)(0x0a)(0x0b)(0x0c)(0
x0d)(0x0e)(0x0f)(0x10)(0x11)(0x12)(0x13)(0x14)(0x15)(0x16)(0x17)(0x18)(0x19)(0x1
a)(0x1b)(0x1c)(0x1d)(0x1e)(0x1f)(0x20)(0x21)(0x22)(0x23)(0x24)(0x25)(0x26)(0x27)
(0x28)(0x29)(0x2a)(0x2b)(0x2c)(0x2d)(0x2e)(0x2f)(0x30)(0x31)(0x32)(0x33)(0x34)(0
x35)(0x36)(0x37)(0x38)(0x39)(0x3a)(0x3b)(0x3c)(0x3d)(0x3e)(0x3f)(0x40)(0x41)(0x4
2)(0x43)(0x44)(0x45)(0x46)(0x47)(0x48)(0x49)(0x4a)(0x4b)(0x4c)(0x4d)(0x4e)(0x4f)
(0x50)(0x51)(0x52)(0x53)(0x54)(0x55)(0x56)(0x57)(0x58)(0x59)(0x5a)(0x5b)(0x5c)(0
x5d)(0x5e)(0x5f)(0x60)(0x61)(0x62)(0x63)(0x64)(0x65)(0x66)(0x67)(0x68)(0x69)(0x6
a)(0x6b)(0x6c)(0x6d)(0x6e)(0x6f)(0x70)(0x71)(0x72)(0x73)(0x74)(0x75)(0x76)(0x77)
(0x78)(0x79)(0x7a)(0x7b)(0x7c)(0x7d)(0x7e)(0x7f)
i2c-pm520.o: I2C module #2 installed

Ummm... you should see only existing devices here, something like this:

i2c-algo-5xxx.o: scanning bus PM520 I2C module #2 interface...
........................................................................................(0x58)(0x59)(0x5a)(0x5b)(0x5c)(0x5d)(0x5e)(0x5f)...............................(0x7f)
i2c-pm520.o: I2C module #2 installed

eth0: status: link up, 100 Mbps Half Duplex.

                                  ^^^^^^^^^^^^
Is this correct?

Content-Type: text/html; charsetÿSO-8859-1"
Content-Transfer-Encoding: quoted-printable

Please don't post HMTL to mailing lists.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
A Chairman was as necessary to a Board planet  as  the  zero  was  in
mathematics, but being a zero had big disadvantages...
                         - Terry Pratchett, _The Dark Side of the Sun_

wd@denx.de wrote on 23.09.2004 20:07:57:

=20

quoted

I am however having a more difficult time getting the linux kernel=20
(linuxppc=5F2=5F4=5Fdevel from Denx) to work with PCF8563.  I get error=

s=20
from=20

quoted

rtc=5Frd( ), but I
can't understand why.  I have compared the i2c clock signals between=20

=20
It works fine on the PM520...
=20

Thanks for your hints.  I tried configuring the kernel for the pm520 board
(make PM520=5Fconfig) and then the RTC stuff works on my board.  Obviously I
had something misconfigured that resulted in the strange behaviour of i2c.

=20
=20

quoted

eth0: status: link up, 100 Mbps Half Duplex.

                                  ^^^^^^^^^^^^
Is this correct?

No, it is actually incorrect and this is something that I need to fix.
My board (NS4) has a DP83847 PHY on the FEC.  I modified fec.c to avoid
kernel panic, but I do not have the PHY handling 100% correct yet.
Ethernet communications are working though, at least when connected to=20
a Cisco Catalyst 2950 with autonegotiation it establishes 100 Mbps Full=20
Duplex.
When connected to an old HP 10Mbps hub linux reports as above, 100 MBps=20
Half Duplex,
but the communications do work despite wrong reported speed.

Any suggestions for reference code for DP83847 with MPC5200 ?

Many thanks,
J=F3n Benediktsson
Marel hf.