Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262539AbUKLO4j (ORCPT ); Fri, 12 Nov 2004 09:56:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262537AbUKLO4g (ORCPT ); Fri, 12 Nov 2004 09:56:36 -0500 Received: from cimice4.lam.cz ([212.71.168.94]:36999 "EHLO beton.cybernet.src") by vger.kernel.org with ESMTP id S262539AbUKLOy3 (ORCPT ); Fri, 12 Nov 2004 09:54:29 -0500 Date: Fri, 12 Nov 2004 14:54:28 +0000 From: Karel Kulhavy To: "Piszcz, Justin Michael" Cc: linux-kernel@vger.kernel.org Subject: Re: /proc/bus/i2c is missing Message-ID: <20041112145428.GB19924@beton.cybernet.src> References: <2E314DE03538984BA5634F12115B3A4E01BC4072@email1.mitretek.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2E314DE03538984BA5634F12115B3A4E01BC4072@email1.mitretek.org> User-Agent: Mutt/1.4.2.1i X-Orientation: Gay Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5457 Lines: 159 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 Ah, the documentation is outdated; I no longer have /proc/bus/i2c 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:clock@twibright.com] > Sent: Friday, November 12, 2004 9:37 AM > To: Piszcz, Justin Michael > Cc: linux-kernel@vger.kernel.org > 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: linux-kernel-owner@vger.kernel.org > > [mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of Karel Kulhavy > > Sent: Friday, November 12, 2004 9:12 AM > > To: linux-kernel@vger.kernel.org > > 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 majordomo@vger.kernel.org > > 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 majordomo@vger.kernel.org > > 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 majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/