Every 15 seconds (well a fraction over actually) I get a block of 16 errors like this in syslog (and kern.log and debug)
May 8 16:03:38 odin kernel: [ 4157.245815] gpio_request: gpio-30 (sysfs) status -16
May 8 16:03:38 odin kernel: [ 4157.245997] export_store: status -16
May 8 16:03:38 odin kernel: [ 4157.251260] gpio_request: gpio-60 (sysfs) status -16
May 8 16:03:38 odin kernel: [ 4157.251303] export_store: status -16
May 8 16:03:38 odin kernel: [ 4157.256589] gpio_request: gpio-31 (sysfs) status -16
May 8 16:03:38 odin kernel: [ 4157.256629] export_store: status -16
May 8 16:03:38 odin kernel: [ 4157.261988] gpio_request: gpio-50 (sysfs) status -16
May 8 16:03:38 odin kernel: [ 4157.262030] export_store: status -16
May 8 16:03:38 odin kernel: [ 4157.263216] gpio_request: gpio-66 (sysfs) status -16
May 8 16:03:38 odin kernel: [ 4157.263250] export_store: status -16
May 8 16:03:38 odin kernel: [ 4157.269821] gpio_request: gpio-67 (sysfs) status -16
May 8 16:03:38 odin kernel: [ 4157.269861] export_store: status -16
May 8 16:03:38 odin kernel: [ 4157.271001] gpio_request: gpio-69 (sysfs) status -16
May 8 16:03:38 odin kernel: [ 4157.271036] export_store: status -16
May 8 16:03:38 odin kernel: [ 4157.276298] gpio_request: gpio-68 (sysfs) status -16
May 8 16:03:38 odin kernel: [ 4157.276338] export_store: status -16
Does anyone have any idea what might be causing this. It’s on a rather old BBB running some very simple bits of python monitoring some 1-wire devices.