This describes all of the sysfs files that greybus exposes to userspace Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- Documentation/ABI/testing/sysfs-bus-greybus | 275 ++++++++++++++++++++++++++++ 1 file changed, 275 insertions(+)
--- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-greybus @@ -0,0 +1,275 @@ +What: /sys/bus/greybus/devices/greybusN +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + The "root" greybus device for the Greybus device tree, or bus, + where N is a dynamically assigned 1-based id. + +What: /sys/bus/greybus/devices/greybusN/bus_id +Date: April 2016 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + The ID of the "root" greybus device, or bus. + +What: /sys/bus/greybus/devices/N-M +Date: March 2016 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + A Module M on the bus N, where M is the 1-byte interface + ID of the module's primary interface. + +What: /sys/bus/greybus/devices/N-M/eject +Date: March 2016 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + Writing a non-zero argument to this attibute disables the + module's interfaces before physically ejecting it. + +What: /sys/bus/greybus/devices/N-M/module_id +Date: March 2016 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + The ID of a Greybus module, corresponding to the ID of its + primary interface. + +What: /sys/bus/greybus/devices/N-M/num_interfaces +Date: March 2016 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + The number of interfaces of a module. + +What: /sys/bus/greybus/devices/N-M.I +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + An Interface I on the bus N and module N-M, where I is the + 1-byte interface ID. + +What: /sys/bus/greybus/devices/N-M.I/current_now +Date: March 2016 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + Current measurement of the interface in microamps (uA) + +What: /sys/bus/greybus/devices/N-M.I/ddbl1_manufacturer_id +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + Unipro Device Descriptor Block Level 1 manufacturer ID for the + greybus Interface. + +What: /sys/bus/greybus/devices/N-M.I/ddbl1_product_id +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + Unipro Device Descriptor Block Level 1 product ID for the + greybus Interface. + +What: /sys/bus/greybus/devices/N-M.I/interface_id +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + The ID of a Greybus interface. + +What: /sys/bus/greybus/devices/N-M.I/interface_type +Date: June 2016 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + The type of a Greybus interface; "dummy", "unipro", "greybus", + or "unknown". + +What: /sys/bus/greybus/devices/N-M.I/power_now +Date: March 2016 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + Power measurement of the interface in microwatts (uW) + +What: /sys/bus/greybus/devices/N-M.I/power_state +Date: March 2016 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + This file reflects the power state of a Greybus interface. If + the value read from it is "on", then power is currently + supplied to the interface. Otherwise it will read "off" and + power is currently not supplied to the interface. + + If the value read is "off", then writing "on" (or '1', 'y', + 'Y') to this file will enable power to the interface and an + attempt to boot and possibly enumerate it will be made. Note + that on errors, the interface will again be powered down. + + If the value read is "on", then writing "off" (or '0', 'n', + 'N') to this file will power down the interface. + +What: /sys/bus/greybus/devices/N-M.I/product_id +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + Product ID of a Greybus interface. + +What: /sys/bus/greybus/devices/N-M.I/serial_number +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + Serial Number of the Greybus interface, represented by a 64 bit + hexadecimal number. + +What: /sys/bus/greybus/devices/N-M.I/vendor_id +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + Vendor ID of a Greybus interface. + +What: /sys/bus/greybus/devices/N-M.I/voltage_now +Date: March 2016 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + Voltage measurement of the interface in microvolts (uV) + +What: /sys/bus/greybus/devices/N-M.I.ctrl +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + Abstract control device for interface I that represents the + current mode of an enumerated Greybus interface. + +What: /sys/bus/greybus/devices/N-M.I.ctrl/product_string +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + Product ID string of a Greybus interface. + +What: /sys/bus/greybus/devices/N-M.I.ctrl/vendor_string +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + Vendor ID string of a Greybus interface. + +What: /sys/bus/greybus/devices/N-M.I.B +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + A bundle B on the Interface I, B is replaced by a 1-byte + number representing the bundle. + +What: /sys/bus/greybus/devices/N-M.I.B/bundle_class +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + The greybus class of the bundle B. + +What: /sys/bus/greybus/devices/N-M.I.B/bundle_id +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + The interface-unique id of the bundle B. + +What: /sys/bus/greybus/devices/N-M.I.B/gpbX +Date: April 2016 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + The General Purpose Bridged PHY device of the bundle B, + where X is a dynamically assigned 0-based id. + +What: /sys/bus/greybus/devices/N-M.I.B/state +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + A bundle has a state that is managed by the userspace + Endo process. This file allows that Endo to signal + other Android HALs that the state of the bundle has + changed to a specific value. When written to, any + process watching the file will be woken up, and the new + value can be read. It's a "poor-man's IPC", yes, but + simplifies the Android userspace code immensely. + +What: /sys/bus/greybus/devices/N-svc +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + The singleton SVC device of bus N. + +What: /sys/bus/greybus/devices/N-svc/ap_intf_id +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + The AP interface ID, a 1-byte non-zero integer which + defines the position of the AP module on the frame. + The interface positions are defined in the GMP + Module Developer Kit. + +What: /sys/bus/greybus/devices/N-svc/endo_id +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + The Endo ID, which is a 2-byte hexadecimal value + defined by the Endo layout scheme, documented in + the GMP Module Developer Kit. + +What: /sys/bus/greybus/devices/N-svc/intf_eject +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + Write the number of the interface that you wish to + forcibly eject from the system. + +What: /sys/bus/greybus/devices/N-svc/version +Date: October 2015 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + The version number of the firmware in the SVC device. + +What: /sys/bus/greybus/devices/N-svc/watchdog +Date: October 2016 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + If the SVC watchdog is enabled or not. Writing 0 to this + file will disable the watchdog, writing 1 will enable it. + +What: /sys/bus/greybus/devices/N-svc/watchdog_action +Date: July 2016 +KernelVersion: 4.9 +Contact: Greg Kroah-Hartman <g...@kroah.com> +Description: + This attribute indicates the action to be performed upon SVC + watchdog bite. + + The action can be one of the "reset" or "panic". Writing either + one of the "reset" or "panic" will change the behavior of SVC + watchdog bite. Default value is "reset". + + "reset" means the UniPro subsystem is to be reset. + + "panic" means SVC watchdog bite will cause kernel to panic.
