1 What: /sys/bus/platform/devices/ci_h 1 What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_req
2 Date: Feb 2014 2 Date: Feb 2014
3 Contact: Li Jun <jun.li@nxp.com> 3 Contact: Li Jun <jun.li@nxp.com>
4 Description: 4 Description:
5 Can be set and read. 5 Can be set and read.
6 Set a_bus_req(A-device bus req 6 Set a_bus_req(A-device bus request) input to be 1 if
7 the application running on the 7 the application running on the A-device wants to use the bus,
8 and to be 0 when the applicati 8 and to be 0 when the application no longer wants to use
9 the bus(or wants to work as pe 9 the bus(or wants to work as peripheral). a_bus_req can also
10 be set to 1 by kernel in respo 10 be set to 1 by kernel in response to remote wakeup signaling
11 from the B-device, the A-devic 11 from the B-device, the A-device should decide to resume the bus.
12 12
13 Valid values are "1" and "0". 13 Valid values are "1" and "0".
14 14
15 Reading: returns 1 if the appl 15 Reading: returns 1 if the application running on the A-device
16 is using the bus as host role, 16 is using the bus as host role, otherwise 0.
17 17
18 What: /sys/bus/platform/devices/ci_h 18 What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_drop
19 Date: Feb 2014 19 Date: Feb 2014
20 Contact: Li Jun <jun.li@nxp.com> 20 Contact: Li Jun <jun.li@nxp.com>
21 Description: 21 Description:
22 Can be set and read 22 Can be set and read
23 The a_bus_drop(A-device bus dr 23 The a_bus_drop(A-device bus drop) input is 1 when the
24 application running on the A-d 24 application running on the A-device wants to power down
25 the bus, and is 0 otherwise, W 25 the bus, and is 0 otherwise, When a_bus_drop is 1, then
26 the a_bus_req shall be 0. 26 the a_bus_req shall be 0.
27 27
28 Valid values are "1" and "0". 28 Valid values are "1" and "0".
29 29
30 Reading: returns 1 if the bus 30 Reading: returns 1 if the bus is off(vbus is turned off) by
31 A-device, otherwise 0 31 A-device, otherwise 0.
32 32
33 What: /sys/bus/platform/devices/ci_h 33 What: /sys/bus/platform/devices/ci_hdrc.0/inputs/b_bus_req
34 Date: Feb 2014 34 Date: Feb 2014
35 Contact: Li Jun <jun.li@nxp.com> 35 Contact: Li Jun <jun.li@nxp.com>
36 Description: 36 Description:
37 Can be set and read. 37 Can be set and read.
38 The b_bus_req(B-device bus req 38 The b_bus_req(B-device bus request) input is 1 during the time
39 that the application running o 39 that the application running on the B-device wants to use the
40 bus as host, and is 0 when the 40 bus as host, and is 0 when the application no longer wants to
41 work as host and decides to sw 41 work as host and decides to switch back to be peripheral.
42 42
43 Valid values are "1" and "0". 43 Valid values are "1" and "0".
44 44
45 Reading: returns if the applic 45 Reading: returns if the application running on the B device
46 is using the bus as host role, 46 is using the bus as host role, otherwise 0.
47 47
48 What: /sys/bus/platform/devices/ci_h 48 What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_clr_err
49 Date: Feb 2014 49 Date: Feb 2014
50 Contact: Li Jun <jun.li@nxp.com> 50 Contact: Li Jun <jun.li@nxp.com>
51 Description: 51 Description:
52 Only can be set. 52 Only can be set.
53 The a_clr_err(A-device Vbus er 53 The a_clr_err(A-device Vbus error clear) input is used to clear
54 vbus error, then A-device will 54 vbus error, then A-device will power down the bus.
55 55
56 Valid value is "1" 56 Valid value is "1"
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