1 What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_req
3 Contact: Li Jun <b47624@freescale.com>
6 Set a_bus_req(A-device bus request) input to be 1 if
7 the application running on the A-device wants to use the bus,
8 and to be 0 when the application no longer wants to use
9 the bus(or wants to work as peripheral). a_bus_req can also
10 be set to 1 by kernel in response to remote wakeup signaling
11 from the B-device, the A-device should decide to resume the bus.
13 Valid values are "1" and "0".
15 Reading: returns 1 if the application running on the A-device
16 is using the bus as host role, otherwise 0.
18 What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_drop
20 Contact: Li Jun <b47624@freescale.com>
23 The a_bus_drop(A-device bus drop) input is 1 when the
24 application running on the A-device wants to power down
25 the bus, and is 0 otherwise, When a_bus_drop is 1, then
26 the a_bus_req shall be 0.
28 Valid values are "1" and "0".
30 Reading: returns 1 if the bus is off(vbus is turned off) by
31 A-device, otherwise 0.
33 What: /sys/bus/platform/devices/ci_hdrc.0/inputs/b_bus_req
35 Contact: Li Jun <b47624@freescale.com>
38 The b_bus_req(B-device bus request) input is 1 during the time
39 that the application running on the B-device wants to use the
40 bus as host, and is 0 when the application no longer wants to
41 work as host and decides to switch back to be peripheral.
43 Valid values are "1" and "0".
45 Reading: returns if the application running on the B device
46 is using the bus as host role, otherwise 0.
48 What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_clr_err
50 Contact: Li Jun <b47624@freescale.com>
53 The a_clr_err(A-device Vbus error clear) input is used to clear
54 vbus error, then A-device will power down the bus.