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<p class=MsoNormal>Hi all,<o:p></o:p></p>
<p class=MsoNormal> I
am a newbie to the powerpc linux kernel, but I have worked on some drivers in
arm architecture. I am finding powerpc architecture to be fully different than
that.<o:p></o:p></p>
<p class=MsoNormal>I am working on Freescale MPC5121e with the BSP MPC512xADS_20090603-ltib.iso
running in it on the ADS512101 Rev4.1 development kit.<o:p></o:p></p>
<p class=MsoNormal>Can anyone help me in finding some documentation for
understanding and working on the powerpc kernel. Any links to the powerpc
forums will also be appreciable.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>-> Currently I am going to develop an I2C client driver
for one slave microcontroller of our project.<o:p></o:p></p>
<p class=MsoNormal>I have some knowledge in the I2C client driver making(legacy
style and new style).<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I made a basic I2C client driver to probe for the chip
address and for testing I gave it the chip address 0x68(I2C chip address of the
M4T162 RTC, present on the board).<o:p></o:p></p>
<p class=MsoNormal>But while inserting my driver I am getting failure message
for the detection of my chip.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>So I would like to know what other formalities am I lagging
in my I2C chip driver.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>-> Also I am in a need for the GPIO driver for my
controller ot get interrupt on ht estate change. When I searched in the kernel
code I could not find any procedure to do that, also I could not find out the procedure
to access either any GPIO pin macros or any register to remap with ioremap().
So please guide me in finding the proper way to do the GPIO accessing and interrupt
registration.<o:p></o:p></p>
<p class=MsoNormal>Will the ioremap() work on powerpc arch? If yes where can I find
the memory mapping(register definitions) to use for my GPIO driver making.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks for patience in reading my queries.<o:p></o:p></p>
<p class=MsoNormal>Any help is appreciable.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:12.0pt'>Thanks & Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'>Uma</span><span
style='font-size:12.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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