Hi there, I have been using the LM93 kernel driver and I noticed that 'gpio' file in sysfs is read-only and that the GPIO pins of the LM93 chip can be used as input only. I attached a patch that allows to also use GPIO pins as output, by simply writing to 'gpio' in sysfs. The patch is against the current git revision of the mainstream kernel. I did not handle the case where the GPIO pins are used as inputs after being used as output (in which case, according to the datasheet, 0s should be written to the GPO register, and thus 1s should be written to the 'gpio' sysfs file). Also, if some pins are used as inputs and others as outputs, then, when writing to the 'gpio' file in sysfs, the pins used as inputs should be set to 1 (so that the corresponding bits in the GPO register are set to 0). Comments are welcome. Best regards, Olivier Hochreutiner -------------- next part -------------- A non-text attachment was scrubbed... Name: lm93_gpio_output.patch Type: application/octet-stream Size: 2834 bytes Desc: not available Url : http://lists.lm-sensors.org/pipermail/lm-sensors/attachments/20090112/5bf06099/attachment.obj
