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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=900410000-09092009>One I2C driver has been included in 0603 bsp, you can
refer to it.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=900410000-09092009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=900410000-09092009>It has no specific driver for GPIO, but you can
find some initializing code for GPIO in
arch/powerpc/platforms/512x/mpc5125_ads.c. and
mpc512x_pm_test.c.</SPAN></FONT></DIV><FONT face=Arial color=#0000ff
size=2></FONT><BR>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
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<FONT face=Tahoma size=2><B>From:</B>
linuxppc-dev-bounces+hong-jun.chen=freescale.com@lists.ozlabs.org
[mailto:linuxppc-dev-bounces+hong-jun.chen=freescale.com@lists.ozlabs.org]
<B>On Behalf Of </B>Uma Kanta Patro<BR><B>Sent:</B> Tuesday, September 08,
2009 6:56 PM<BR><B>To:</B> linuxppc-dev@lists.ozlabs.org<BR><B>Subject:</B>
Queries regarding I2C and GPIO driver for Freescale MPC5121e in Linux2.6.24 of
BSP: MPC512xADS_20090603-ltib.iso<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<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: 12pt">Thanks &
Regards,<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN style="FONT-SIZE: 12pt">Uma</SPAN><SPAN
style="FONT-SIZE: 12pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal><o:p> </o:p></P></DIV></BLOCKQUOTE></BODY></HTML>