What: /sys/bus/greybus/devices/greybusN
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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The "root" greybus device for the Greybus device tree, or bus,
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where N is a dynamically assigned 1-based id.
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What: /sys/bus/greybus/devices/greybusN/bus_id
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Date: April 2016
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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The ID of the "root" greybus device, or bus.
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What: /sys/bus/greybus/devices/N-M
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Date: March 2016
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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A Module M on the bus N, where M is the 1-byte interface
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ID of the module's primary interface.
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What: /sys/bus/greybus/devices/N-M/eject
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Date: March 2016
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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Writing a non-zero argument to this attibute disables the
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module's interfaces before physically ejecting it.
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What: /sys/bus/greybus/devices/N-M/module_id
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Date: March 2016
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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The ID of a Greybus module, corresponding to the ID of its
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primary interface.
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What: /sys/bus/greybus/devices/N-M/num_interfaces
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Date: March 2016
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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The number of interfaces of a module.
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What: /sys/bus/greybus/devices/N-M.I
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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An Interface I on the bus N and module N-M, where I is the
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1-byte interface ID.
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What: /sys/bus/greybus/devices/N-M.I/current_now
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Date: March 2016
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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Current measurement of the interface in microamps (uA)
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What: /sys/bus/greybus/devices/N-M.I/ddbl1_manufacturer_id
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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Unipro Device Descriptor Block Level 1 manufacturer ID for the
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greybus Interface.
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What: /sys/bus/greybus/devices/N-M.I/ddbl1_product_id
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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Unipro Device Descriptor Block Level 1 product ID for the
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greybus Interface.
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What: /sys/bus/greybus/devices/N-M.I/interface_id
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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The ID of a Greybus interface.
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What: /sys/bus/greybus/devices/N-M.I/interface_type
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Date: June 2016
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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The type of a Greybus interface; "dummy", "unipro", "greybus",
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or "unknown".
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What: /sys/bus/greybus/devices/N-M.I/power_now
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Date: March 2016
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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Power measurement of the interface in microwatts (uW)
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What: /sys/bus/greybus/devices/N-M.I/power_state
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Date: March 2016
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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This file reflects the power state of a Greybus interface. If
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the value read from it is "on", then power is currently
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supplied to the interface. Otherwise it will read "off" and
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power is currently not supplied to the interface.
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If the value read is "off", then writing "on" (or '1', 'y',
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'Y') to this file will enable power to the interface and an
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attempt to boot and possibly enumerate it will be made. Note
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that on errors, the interface will again be powered down.
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If the value read is "on", then writing "off" (or '0', 'n',
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'N') to this file will power down the interface.
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What: /sys/bus/greybus/devices/N-M.I/product_id
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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Product ID of a Greybus interface.
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What: /sys/bus/greybus/devices/N-M.I/serial_number
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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Serial Number of the Greybus interface, represented by a 64 bit
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hexadecimal number.
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What: /sys/bus/greybus/devices/N-M.I/vendor_id
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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Vendor ID of a Greybus interface.
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What: /sys/bus/greybus/devices/N-M.I/voltage_now
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Date: March 2016
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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Voltage measurement of the interface in microvolts (uV)
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What: /sys/bus/greybus/devices/N-M.I.ctrl
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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Abstract control device for interface I that represents the
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current mode of an enumerated Greybus interface.
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What: /sys/bus/greybus/devices/N-M.I.ctrl/product_string
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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Product ID string of a Greybus interface.
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What: /sys/bus/greybus/devices/N-M.I.ctrl/vendor_string
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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Vendor ID string of a Greybus interface.
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What: /sys/bus/greybus/devices/N-M.I.B
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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A bundle B on the Interface I, B is replaced by a 1-byte
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number representing the bundle.
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What: /sys/bus/greybus/devices/N-M.I.B/bundle_class
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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The greybus class of the bundle B.
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What: /sys/bus/greybus/devices/N-M.I.B/bundle_id
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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The interface-unique id of the bundle B.
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What: /sys/bus/greybus/devices/N-M.I.B/gpbX
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Date: April 2016
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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The General Purpose Bridged PHY device of the bundle B,
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where X is a dynamically assigned 0-based id.
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What: /sys/bus/greybus/devices/N-M.I.B/state
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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A bundle has a state that is managed by the userspace
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Endo process. This file allows that Endo to signal
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other Android HALs that the state of the bundle has
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changed to a specific value. When written to, any
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process watching the file will be woken up, and the new
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value can be read. It's a "poor-man's IPC", yes, but
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simplifies the Android userspace code immensely.
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What: /sys/bus/greybus/devices/N-svc
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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The singleton SVC device of bus N.
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What: /sys/bus/greybus/devices/N-svc/ap_intf_id
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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The AP interface ID, a 1-byte non-zero integer which
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defines the position of the AP module on the frame.
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The interface positions are defined in the GMP
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Module Developer Kit.
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What: /sys/bus/greybus/devices/N-svc/endo_id
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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The Endo ID, which is a 2-byte hexadecimal value
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defined by the Endo layout scheme, documented in
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the GMP Module Developer Kit.
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What: /sys/bus/greybus/devices/N-svc/intf_eject
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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Write the number of the interface that you wish to
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forcibly eject from the system.
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What: /sys/bus/greybus/devices/N-svc/version
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Date: October 2015
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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The version number of the firmware in the SVC device.
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What: /sys/bus/greybus/devices/N-svc/watchdog
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Date: October 2016
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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If the SVC watchdog is enabled or not. Writing 0 to this
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file will disable the watchdog, writing 1 will enable it.
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What: /sys/bus/greybus/devices/N-svc/watchdog_action
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Date: July 2016
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KernelVersion: 4.XX
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Contact: Greg Kroah-Hartman <greg@kroah.com>
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Description:
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This attribute indicates the action to be performed upon SVC
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watchdog bite.
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The action can be one of the "reset" or "panic". Writing either
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one of the "reset" or "panic" will change the behavior of SVC
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watchdog bite. Default value is "reset".
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"reset" means the UniPro subsystem is to be reset.
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"panic" means SVC watchdog bite will cause kernel to panic.
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