Hello
linux 2.6.8.1
I insmoded i2c-parport and pcf8591 modules and i2c-1 appeared in my /dev
(previously, only i2c-0 was there):
clock@oberon:~$ ls /dev/i2*
/dev/i2c-0 /dev/i2c-1
/dev/i2c:
0 1
/usr/src/linux/Documentation/i2c says "You can
examine /proc/bus/i2c to see what number corresponds to which adapter."
I don't have any /proc/i2c:
clock@oberon:~$ ls /proc/i2c
ls: /proc/i2c: No such file or directory
However, I have /proc:
clock@oberon:~$ ls /proc
devices mtrr
diskstats net
dma partitions
driver pci
execdomains scsi
filesystems self
fs slabinfo
ide stat
interrupts swaps
[...] iomem sys
ioports sysrq-trigger
irq sysvipc
kallsyms tty
kcore uptime
kmsg version
loadavg vmstat
locks
buddyinfo mdstat
bus meminfo
cmdline misc
config.gz modules
cpuinfo mounts
How can I make /proc/i2c appear?
Cl<
You need the core i2c modules loaded.
$ lsmod
Module Size Used by
adm1021 12092 0
i2c_piix4 5648 0
i2c_sensor 2912 1 adm1021
i2c_dev 7776 0
i2c_core 19312 4 adm1021,i2c_piix4,i2c_sensor,i2c_dev
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Karel Kulhavy
Sent: Friday, November 12, 2004 9:12 AM
To: [email protected]
Subject: /proc/bus/i2c is missing
Hello
linux 2.6.8.1
I insmoded i2c-parport and pcf8591 modules and i2c-1 appeared in my /dev
(previously, only i2c-0 was there):
clock@oberon:~$ ls /dev/i2*
/dev/i2c-0 /dev/i2c-1
/dev/i2c:
0 1
/usr/src/linux/Documentation/i2c says "You can
examine /proc/bus/i2c to see what number corresponds to which adapter."
I don't have any /proc/i2c:
clock@oberon:~$ ls /proc/i2c
ls: /proc/i2c: No such file or directory
However, I have /proc:
clock@oberon:~$ ls /proc
devices mtrr
diskstats net
dma partitions
driver pci
execdomains scsi
filesystems self
fs slabinfo
ide stat
interrupts swaps
[...] iomem sys
ioports sysrq-trigger
irq sysvipc
kallsyms tty
kcore uptime
kmsg version
loadavg vmstat
locks
buddyinfo mdstat
bus meminfo
cmdline misc
config.gz modules
cpuinfo mounts
How can I make /proc/i2c appear?
Cl<
On Fri, Nov 12, 2004 at 09:22:46AM -0500, Piszcz, Justin Michael wrote:
> You need the core i2c modules loaded.
I have "<*> I2C support" and "<*> I2C device interface" switched on in make
menuconfig (non-modular). I skimmed through the whole I2C support submenu
and didn't find any i2c core. Just i2c core debugging messages, but it isn't
probably what you mean.
Which option in make menuconfig is i2c_core?
And btw I found this:
root@oberon:/usr/src/linux-2.6.8.1-patched/drivers/i2c/busses# find /sys/bus/i2c/sys/bus/i2c
/sys/bus/i2c/drivers
/sys/bus/i2c/drivers/pcf8591
/sys/bus/i2c/drivers/lm85
/sys/bus/i2c/drivers/lm85/0-002e
/sys/bus/i2c/drivers/eeprom
/sys/bus/i2c/drivers/eeprom/0-0052
/sys/bus/i2c/drivers/eeprom/0-0050
/sys/bus/i2c/drivers/dev_driver
/sys/bus/i2c/drivers/i2c_adapter
/sys/bus/i2c/devices
/sys/bus/i2c/devices/0-002e
/sys/bus/i2c/devices/0-0052
/sys/bus/i2c/devices/0-0050
Isn't it what the documentation talks about as /proc/bus/i2c? Or is it
something different?
Cl<
>
> $ lsmod
> Module Size Used by
> adm1021 12092 0
> i2c_piix4 5648 0
> i2c_sensor 2912 1 adm1021
> i2c_dev 7776 0
> i2c_core 19312 4 adm1021,i2c_piix4,i2c_sensor,i2c_dev
>
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Karel Kulhavy
> Sent: Friday, November 12, 2004 9:12 AM
> To: [email protected]
> Subject: /proc/bus/i2c is missing
>
> Hello
>
> linux 2.6.8.1
>
> I insmoded i2c-parport and pcf8591 modules and i2c-1 appeared in my /dev
> (previously, only i2c-0 was there):
>
> clock@oberon:~$ ls /dev/i2*
> /dev/i2c-0 /dev/i2c-1
>
> /dev/i2c:
> 0 1
>
> /usr/src/linux/Documentation/i2c says "You can
> examine /proc/bus/i2c to see what number corresponds to which adapter."
> I don't have any /proc/i2c:
>
> clock@oberon:~$ ls /proc/i2c
> ls: /proc/i2c: No such file or directory
>
> However, I have /proc:
> clock@oberon:~$ ls /proc
> devices mtrr
> diskstats net
> dma partitions
> driver pci
> execdomains scsi
> filesystems self
> fs slabinfo
> ide stat
> interrupts swaps
> [...] iomem sys
> ioports sysrq-trigger
> irq sysvipc
> kallsyms tty
> kcore uptime
> kmsg version
> loadavg vmstat
> locks
> buddyinfo mdstat
> bus meminfo
> cmdline misc
> config.gz modules
> cpuinfo mounts
>
> How can I make /proc/i2c appear?
>
> Cl<
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel"
> in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
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Ah, the documentation is outdated; I no longer have /proc/bus/i2c
either. You may need to update the other software that used
/proc/bus/i2c, as it should now use /sys/bus/i2c.
You are correct, <*> I2C support should encompass the i2c_core.
In addition, you may want to install lm_sensors and run the
sensors-detect script, which will help detect all the required modules
necessary for your hardware.
Curious, what are you trying to get working with I2C that involves the
parallel port?
-----Original Message-----
From: Karel Kulhavy [mailto:[email protected]]
Sent: Friday, November 12, 2004 9:37 AM
To: Piszcz, Justin Michael
Cc: [email protected]
Subject: Re: /proc/bus/i2c is missing
On Fri, Nov 12, 2004 at 09:22:46AM -0500, Piszcz, Justin Michael wrote:
> You need the core i2c modules loaded.
I have "<*> I2C support" and "<*> I2C device interface" switched on in
make
menuconfig (non-modular). I skimmed through the whole I2C support
submenu
and didn't find any i2c core. Just i2c core debugging messages, but it
isn't
probably what you mean.
Which option in make menuconfig is i2c_core?
And btw I found this:
root@oberon:/usr/src/linux-2.6.8.1-patched/drivers/i2c/busses# find
/sys/bus/i2c/sys/bus/i2c
/sys/bus/i2c/drivers
/sys/bus/i2c/drivers/pcf8591
/sys/bus/i2c/drivers/lm85
/sys/bus/i2c/drivers/lm85/0-002e
/sys/bus/i2c/drivers/eeprom
/sys/bus/i2c/drivers/eeprom/0-0052
/sys/bus/i2c/drivers/eeprom/0-0050
/sys/bus/i2c/drivers/dev_driver
/sys/bus/i2c/drivers/i2c_adapter
/sys/bus/i2c/devices
/sys/bus/i2c/devices/0-002e
/sys/bus/i2c/devices/0-0052
/sys/bus/i2c/devices/0-0050
Isn't it what the documentation talks about as /proc/bus/i2c? Or is it
something different?
Cl<
>
> $ lsmod
> Module Size Used by
> adm1021 12092 0
> i2c_piix4 5648 0
> i2c_sensor 2912 1 adm1021
> i2c_dev 7776 0
> i2c_core 19312 4 adm1021,i2c_piix4,i2c_sensor,i2c_dev
>
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Karel Kulhavy
> Sent: Friday, November 12, 2004 9:12 AM
> To: [email protected]
> Subject: /proc/bus/i2c is missing
>
> Hello
>
> linux 2.6.8.1
>
> I insmoded i2c-parport and pcf8591 modules and i2c-1 appeared in my
/dev
> (previously, only i2c-0 was there):
>
> clock@oberon:~$ ls /dev/i2*
> /dev/i2c-0 /dev/i2c-1
>
> /dev/i2c:
> 0 1
>
> /usr/src/linux/Documentation/i2c says "You can
> examine /proc/bus/i2c to see what number corresponds to which
adapter."
> I don't have any /proc/i2c:
>
> clock@oberon:~$ ls /proc/i2c
> ls: /proc/i2c: No such file or directory
>
> However, I have /proc:
> clock@oberon:~$ ls /proc
> devices mtrr
> diskstats net
> dma partitions
> driver pci
> execdomains scsi
> filesystems self
> fs slabinfo
> ide stat
> interrupts swaps
> [...] iomem sys
> ioports sysrq-trigger
> irq sysvipc
> kallsyms tty
> kcore uptime
> kmsg version
> loadavg vmstat
> locks
> buddyinfo mdstat
> bus meminfo
> cmdline misc
> config.gz modules
> cpuinfo mounts
>
> How can I make /proc/i2c appear?
>
> Cl<
> -
> To unsubscribe from this list: send the line "unsubscribe
linux-kernel"
> in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
> -
> To unsubscribe from this list: send the line "unsubscribe
linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
On Fri, Nov 12, 2004 at 09:41:47AM -0500, Piszcz, Justin Michael wrote:
> Ah, the documentation is outdated; I no longer have /proc/bus/i2c
> either. You may need to update the other software that used
> /proc/bus/i2c, as it should now use /sys/bus/i2c.
>
> You are correct, <*> I2C support should encompass the i2c_core.
>
> In addition, you may want to install lm_sensors and run the
> sensors-detect script, which will help detect all the required modules
> necessary for your hardware.
>
> Curious, what are you trying to get working with I2C that involves the
> parallel port?
A free technology hardware i2c <-> parport adaptor powered from the parallel
port featuring optical isolation.
Now I have (hopefully - according to some measurements) working airwire
prototype and a known working other board with pcf8591 chip that measures
temperature.
As soon as the adaptor is verified to run flawlessly, it will be redesigned
into a PCB and the result published under GPL in the same style as Ronja
Twister http://ronja.twibright.com/twister/index.php
I have already written the driver for it (added type=6 into i2c-parport.c and
extended the struct adapter_parm .init entry with .init2 and .init3 because the
hardware requires lines d0-d7, init and /autofd to be set to electrical H
simultaneously for the electronics to work) and now I am trying to make it
find the pcf8591 chip connected to it and read some data.
Cl<
>
> -----Original Message-----
> From: Karel Kulhavy [mailto:[email protected]]
> Sent: Friday, November 12, 2004 9:37 AM
> To: Piszcz, Justin Michael
> Cc: [email protected]
> Subject: Re: /proc/bus/i2c is missing
>
> On Fri, Nov 12, 2004 at 09:22:46AM -0500, Piszcz, Justin Michael wrote:
> > You need the core i2c modules loaded.
>
> I have "<*> I2C support" and "<*> I2C device interface" switched on in
> make
> menuconfig (non-modular). I skimmed through the whole I2C support
> submenu
> and didn't find any i2c core. Just i2c core debugging messages, but it
> isn't
> probably what you mean.
>
> Which option in make menuconfig is i2c_core?
>
> And btw I found this:
> root@oberon:/usr/src/linux-2.6.8.1-patched/drivers/i2c/busses# find
> /sys/bus/i2c/sys/bus/i2c
> /sys/bus/i2c/drivers
> /sys/bus/i2c/drivers/pcf8591
> /sys/bus/i2c/drivers/lm85
> /sys/bus/i2c/drivers/lm85/0-002e
> /sys/bus/i2c/drivers/eeprom
> /sys/bus/i2c/drivers/eeprom/0-0052
> /sys/bus/i2c/drivers/eeprom/0-0050
> /sys/bus/i2c/drivers/dev_driver
> /sys/bus/i2c/drivers/i2c_adapter
> /sys/bus/i2c/devices
> /sys/bus/i2c/devices/0-002e
> /sys/bus/i2c/devices/0-0052
> /sys/bus/i2c/devices/0-0050
>
> Isn't it what the documentation talks about as /proc/bus/i2c? Or is it
> something different?
>
> Cl<
> >
> > $ lsmod
> > Module Size Used by
> > adm1021 12092 0
> > i2c_piix4 5648 0
> > i2c_sensor 2912 1 adm1021
> > i2c_dev 7776 0
> > i2c_core 19312 4 adm1021,i2c_piix4,i2c_sensor,i2c_dev
> >
> >
> > -----Original Message-----
> > From: [email protected]
> > [mailto:[email protected]] On Behalf Of Karel Kulhavy
> > Sent: Friday, November 12, 2004 9:12 AM
> > To: [email protected]
> > Subject: /proc/bus/i2c is missing
> >
> > Hello
> >
> > linux 2.6.8.1
> >
> > I insmoded i2c-parport and pcf8591 modules and i2c-1 appeared in my
> /dev
> > (previously, only i2c-0 was there):
> >
> > clock@oberon:~$ ls /dev/i2*
> > /dev/i2c-0 /dev/i2c-1
> >
> > /dev/i2c:
> > 0 1
> >
> > /usr/src/linux/Documentation/i2c says "You can
> > examine /proc/bus/i2c to see what number corresponds to which
> adapter."
> > I don't have any /proc/i2c:
> >
> > clock@oberon:~$ ls /proc/i2c
> > ls: /proc/i2c: No such file or directory
> >
> > However, I have /proc:
> > clock@oberon:~$ ls /proc
> > devices mtrr
> > diskstats net
> > dma partitions
> > driver pci
> > execdomains scsi
> > filesystems self
> > fs slabinfo
> > ide stat
> > interrupts swaps
> > [...] iomem sys
> > ioports sysrq-trigger
> > irq sysvipc
> > kallsyms tty
> > kcore uptime
> > kmsg version
> > loadavg vmstat
> > locks
> > buddyinfo mdstat
> > bus meminfo
> > cmdline misc
> > config.gz modules
> > cpuinfo mounts
> >
> > How can I make /proc/i2c appear?
> >
> > Cl<
> > -
> > To unsubscribe from this list: send the line "unsubscribe
> linux-kernel"
> > in
> > the body of a message to [email protected]
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at http://www.tux.org/lkml/
> > -
> > To unsubscribe from this list: send the line "unsubscribe
> linux-kernel" in
> > the body of a message to [email protected]
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at http://www.tux.org/lkml/
On Fri, Nov 12, 2004 at 02:12:02PM +0000, Karel Kulhavy wrote:
> Hello
>
> linux 2.6.8.1
>
> I insmoded i2c-parport and pcf8591 modules and i2c-1 appeared in my /dev
> (previously, only i2c-0 was there):
>
> clock@oberon:~$ ls /dev/i2*
> /dev/i2c-0 /dev/i2c-1
>
> /dev/i2c:
> 0 1
>
> /usr/src/linux/Documentation/i2c says "You can
> examine /proc/bus/i2c to see what number corresponds to which adapter."
> I don't have any /proc/i2c:
That is outdated, and you should look in /sys/class/i2c-dev/. I'll go
change that documentation now.
thanks,
greg k-h