i2ctools in lm_sensors

The uClinux-dist/lib/sysfsutils/config.sub file needs update for Nios2 support.

Please try search config.sub files in user/* dir.

I had added Nios2 to some of them. You can learn how to add Nios2 support.

I will try to add it on Monday or later. I didn't have the sources on hand.

Hi Hippo,

Thanks for your great help. I will try it out on Monday ...

I compiled i2ctools sucessfully on a saperately.

However, when I start to use it to test some i2c devices connected to the system, it some errors which I don't understand. I have added /dev/i2c-0 in romfs_list. The kernel seems to understand that there is i2c driver, and opencores algorithm.

Using a scope to probe those signals, but just cannot get anything.

Any ideas ? Perhaps something I missed or overlooked.

Happy weekend.

You may enable debug messages for the drivers.

Then try to access the basic i2c char dev.

You need to make sure the i2c access works onto the bus.

Hippo,

Any news on the compiling lm_sensors in make menuconfig ?

Hippo,

I have scratching my head on this.

With the mysys.ptf, make generates

uClinux-dist/linux-2.6.x/include/nios2_system.h

which contains the avalon bus hardware address for my i2c as shown below

...# define na_pio_eigen_0_end 0x022208c4# define na_i2c_0 0x822208e0# define na_i2c_0_irq 7

...

I have lookedi n the i2c source code, and cannot find any references to na_i2c_0.

Can you help ? This may get me somewhere if I know where these things are referenced.

Thanks.

I also notice when I do a make, I notice the following warnings

WARNING: "enable_irq" [drivers/i2c/busses/i2c-oc.ko] undefined!

WARNING: "disable_irq" [drivers/i2c/busses/i2c-oc.ko] undefined!

Now, is that something that is important ? I know it's only a warning.

Hippo,

When I built the driver into the kernel, and boot up the system, I get the following

Uncompressing Linux... Ok, booting the kernel.
Linux version 2.6.Uncompressing Linux... Ok, booting the kernel.
Linux version 2.6.17-uc1 (uclinux@colinux) (gcc version 3.4.6)# 36 PREEMPT Mon N
ov 6 11:12:34 EST 2006
uClinux/Nios II
Altera Nios II support (C) 2004 Microtronix Datacom Ltd.
Built 1 zonelists
Kernel command line:
PID hash table entries: 256 (order: 8, 1024 bytes)
...
smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre <nico@cam.org>
eth0: SMC91C11xFD (rev 1) at 82210300 IRQ 6 
eth0: Ethernet addr: 00:07:ed:0f:06:92
i2c /dev entries driver
i2c-oc: i2c Opencores adapter driver
Opencores i2c algorithm module
TCP bic registered
NET: Registered protocol family 1
...

Does it mean the drivers are in ?

Also, when I try to do i2cdetect, I get this.

/nios2bin> ./i2cdetect
Error: No i2c-bus specified!
Syntax: i2cdetect   I2CBUS 
  I2CBUS is an integer
  With -f, scans all addresses (NOT RECOMMENDED)
  With -q, uses only quick write commands for probing (NOT RECOMMENDED)
  With -r, uses only read byte commands for probing (NOT RECOMMENDED)
  If provided, FIRST and LAST limit the probing range.
  i2cdetect -l lists installed busses only
  Installed I2C busses:
    i2c-0       unknown         Opencores i2c 0                         Algorithm unavailable
/nios2bin>

It looks like the algorithm is NOT available.

but, when I try modprobe i2c-algo-oc, I get the following

/nios2bin> modprobe i2c-algo-oc
modprobe: could not parse modules.dep

This is very confusing for me. Please help.

Hippo,

I don't what went wrong. After exhausting the code in uclinux (with limited knowledge), I decided to rebuild the sof file in Quartus II. And also regenerate NIOS II in SOPC builder.

And things are more promising now. At least I am seeing some signals coming out of the hardware, which is really good news.

Thanks for your help.

Once I got something working, I shall post it to the wiki for the benefits of others.

--- Quote Start ---

originally posted by albertyong88@Nov 6 2006, 11:33 PM

hippo,

i don't what went wrong. after exhausting the code in uclinux (with limited knowledge), i decided to rebuild the sof file in quartus ii. and also regenerate nios ii in sopc builder.

and things are more promising now. at least i am seeing some signals coming out of the hardware, which is really good news.

thanks for your help.

once i got something working, i shall post it to the wiki for the benefits of others.

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--- quote end ---

--- Quote End ---

I have updated the nios2 patches, ver 13.

The sysfs lib can build now.

But there are still a lot of problems in lm_senses .

I think the lm_senses may become very big, due to the lack of shared suport in nios2.

You should try chip drivers in kernel. It may be easier.

The modules may be confsing. You should disable modules for the tests.