[ixp1200] Question about the Linux kernel and the FBI RDYBUS registers.

[Didier CONTIS]

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Hi,

I am observing a weird behavior when trying to read / write 
some registers from the Linux kernel running on the StrongARM.

Basically, it seems I can write some registers like IREG without
any problem from the StrongARM. However it seems I cannot with 
RDYBUS_TEMPLATE_CTL. However both registers are described in the doc 
as being r/w accessible by the StrongARM.

Below is the output of my program.
I am using the following definition for RDYBUS_TEMPLATE_CTL
(IREG being already defined in the includes files):

#define MY_RDYBUS_TEMPLATE_CTL
IXP1200_REG(MICROENGINE_FBI_BASE+0x40180)

[root at thing1 Didier]$./set_rcv   
Initial value of RDYBUS_TEMPLATE_CTL Register: 0 
Initial value of IREG Register: 0 

Address of RDYBUS_TEMPLATE_CTL Register: f0640180 
Address of IREG Register: f06401e0 

New value of RDYBUS_TEMPLATE_CTL Register: 0 
New value of IREG Register: 80000000 

Thanks in advance for any help.

Regards, Didier.

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