greybus: Documentation/sysfs: add example control devices
Add control devices to the example sysfs tree. Control devices are named <bus_id>-<module_id>.<intf_id>.ctrl and expose attributes that are specific to the greybus interface type. Specifically, dummy interfaces do not have a control device. Currently, only the vendor and product strings extracted from the manifest are exported. A subtree of the example tree now looks as follows: greybus1/ ├── 1-5 │ ├── 1-5.5 │ │ ├── 1-5.5.2 │ │ │ ├── bundle_class │ │ │ ├── bundle_id │ │ │ └── state │ │ ├── 1-5.5.ctrl │ │ │ ├── product_string │ │ │ └── vendor_string │ │ ├── ddbl1_manufacturer_id │ │ ├── ddbl1_product_id │ │ ├── interface_id │ │ ├── product_id │ │ ├── serial_number │ │ └── vendor_id │ ├── 1-5.6 │ │ └── interface_id │ ├── eject │ ├── module_id │ └── num_interfaces └── 1-svc Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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