On 08/24/11 09:53, malas wrote: > On Wed, 24 Aug 2011 09:44:00 +0100, Jonathan Cameron wrote >> On 08/24/11 09:26, malas wrote: >>> >>> Dear Michael Hennerich, >>> >>> I have attached the details of my testing with the ad7793 driver both as when installed >>> as module and otherwise. >>> >>> I have not been to resolve the issue even after having created a device node under /dev >>> as device0:buffer0. >>> >>> Requesting your further assistance for the same. >>> >>> Thanks >>> Mala >>> >>> >>> >>> -- >>> Open WebMail Project (http://openwebmail.org) >>> >>> >>> >> >>> Testing results of ADC ad7793 driver with generic_buffer.c >>> >>> >>> Results of installing ad7793 adc driver as module: >>> >>> root:/> cd lib/modules/3.1.0-rc1-dirty/kernel/drivers/staging/iio/adc/ >>> root:/lib/modules/3.1.0-rc1-dirty/kernel/drivers/staging/iio/adc> ls ad7793.ko >>> root:/lib/modules/3.1.0-rc1-dirty/kernel/drivers/staging/iio/adc> insmod ad7793. ko >>> ad7793: module is from the staging directory, the quality is unknown, you have been > warned. >>> root:/lib/modules/3.1.0-rc1-dirty/kernel/drivers/staging/iio/adc> lsmod >>> Module Size Used by >>> ad7793 7998 0 >>> root:/lib/modules/3.1.0-rc1-dirty/kernel/drivers/staging/iio/adc> cd >>> root:/> ls -l /dev/device0\:buffer0 >>> crw-r--r-- 1 root root 0, 0 Jan 1 00:00 /dev/device0:buffer0 >>> root:/> ls /sys/bus/iio/devices/ >>> iio_sysfs_trigger >>> root:/> >>> >>> I observed driver probe() doesn't get called when inserted as module. Also the > device0\buffer0 nodes dont get created on installation. >> >> If probe isn't getting called then something has gone wrong in device matching. >> What is the board file you are using? (guessing blackfin hasn't gone all >> device tree yet?) > > board file and driver has name and modalias as ad7793 (small case) > > >> >>> Results of installing ad7793 adc driver built into kernel: >>> >>> I added following line in .rc under dist/vendor/AnalogDevices/common/. >>> >>> mknod /dev/device0:buffer0 c 0 0 >>> >>> Please confirm this property of node is correct? >> >> No it isn't. >> http://www.kernel.org/pub/linux/docs/device-list/devices-2.6+.txt >> tells us that 0 0 is reserved for null devices. > > iio major number listed under/proc/devices for iio was 254 > What major and minor number should I initialize for the /dev/devicw0buffer0 device node. Major as you've noted is 255 > > >> What does the following contain? >> >> /sys/bus/iio/devices/device0:/buffer0/dev > > It has ad7793-dev really? Should be a major:minor number pair. > -- > Open WebMail Project (http://openwebmail.org) > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
