From: Tim C. <tco...@gm...> - 2011-10-04 10:37:18
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Hi all, I'm running a 2.6.39 kernel on an Overo Air with a Summit expansion board. I realize the way of accessing the ADC has changed in this version, and I've had a look at the wiki page here: http://wiki.gumstix.org/index.php?title=ADC_overo_2.6.39%2B I was able to read the values using the files in /sys/class/hwmon/hwmon1/device , but now for some reason the hwmon1/* files are no longer present. I've got no idea what changed, I haven't made any configuration changes to the system, only compiling & running my own program. Not sure if the dmesg log indicates anything - I don't know too much about linux but it's here in case someone can see something! root@overo:~# ls /sys/class/hwmon/ hwmon0 root@overo:~# dmesg | grep twl twl4030: PIH (irq 7) chaining IRQs 368..375 twl4030: power (irq 373) chaining IRQs 376..383 twl4030: gpio (irq 368) chaining IRQs 384..401 twl4030_usb twl4030_usb: HW_CONDITIONS 0x10/16; link 0 twl4030_usb twl4030_usb: Initialized TWL4030 USB module twl4030_usb twl4030_usb: twl4030_phy_resume twl4030_usb twl4030_usb: HW_CONDITIONS 0xd0/208; link 1 twl4030_usb twl4030_usb: HW_CONDITIONS 0x10/16; link 0 twl4030_usb twl4030_usb: twl4030_phy_suspend twl_rtc twl_rtc: rtc core: registered twl_rtc as rtc0 asoc: twl4030-hifi <-> omap-mcbsp-dai.1 mapping ok twl_rtc twl_rtc: setting system clock to 2011-08-28 09:32:24 UTC (1314523944) Any help would be greatly appreciated. |
From: Tim C. <tco...@gm...> - 2011-10-04 10:44:58
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Never mind, I think I've figured it out. Loaded the driver module and the devices are there again. insmod /lib/modules/2.6.39/kernel/drivers/hwmon/twl4030-madc-hwmon.ko On Tue, Oct 4, 2011 at 9:37 PM, Tim Connell <tco...@gm...> wrote: > Hi all, > > I'm running a 2.6.39 kernel on an Overo Air with a Summit expansion board. > I realize the way of accessing the ADC has changed in this version, and I've > had a look at the wiki page here: > http://wiki.gumstix.org/index.php?title=ADC_overo_2.6.39%2B > > I was able to read the values using the files in > /sys/class/hwmon/hwmon1/device , but now for some reason the hwmon1/* files > are no longer present. I've got no idea what changed, I haven't made any > configuration changes to the system, only compiling & running my own > program. > > Not sure if the dmesg log indicates anything - I don't know too much about > linux but it's here in case someone can see something! > > root@overo:~# ls /sys/class/hwmon/ > > hwmon0 > > root@overo:~# dmesg | grep twl > > twl4030: PIH (irq 7) chaining IRQs 368..375 > twl4030: power (irq 373) chaining IRQs 376..383 > twl4030: gpio (irq 368) chaining IRQs 384..401 > twl4030_usb twl4030_usb: HW_CONDITIONS 0x10/16; link 0 > twl4030_usb twl4030_usb: Initialized TWL4030 USB module > twl4030_usb twl4030_usb: twl4030_phy_resume > twl4030_usb twl4030_usb: HW_CONDITIONS 0xd0/208; link 1 > twl4030_usb twl4030_usb: HW_CONDITIONS 0x10/16; link 0 > twl4030_usb twl4030_usb: twl4030_phy_suspend > twl_rtc twl_rtc: rtc core: registered twl_rtc as rtc0 > asoc: twl4030-hifi <-> omap-mcbsp-dai.1 mapping ok > twl_rtc twl_rtc: setting system clock to 2011-08-28 09:32:24 UTC > (1314523944) > > Any help would be greatly appreciated. > |