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Commit | Line | Data |
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f99858e0 LJ |
1 | What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_req |
2 | Date: Feb 2014 | |
3 | Contact: Li Jun <b47624@freescale.com> | |
4 | Description: | |
5 | Can be set and read. | |
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. | |
12 | ||
13 | Valid values are "1" and "0". | |
14 | ||
15 | Reading: returns 1 if the application running on the A-device | |
16 | is using the bus as host role, otherwise 0. | |
17 | ||
18 | What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_drop | |
19 | Date: Feb 2014 | |
20 | Contact: Li Jun <b47624@freescale.com> | |
21 | Description: | |
22 | Can be set and read | |
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. | |
27 | ||
28 | Valid values are "1" and "0". | |
29 | ||
30 | Reading: returns 1 if the bus is off(vbus is turned off) by | |
31 | A-device, otherwise 0. | |
32 | ||
33 | What: /sys/bus/platform/devices/ci_hdrc.0/inputs/b_bus_req | |
34 | Date: Feb 2014 | |
35 | Contact: Li Jun <b47624@freescale.com> | |
36 | Description: | |
37 | Can be set and read. | |
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. | |
42 | ||
43 | Valid values are "1" and "0". | |
44 | ||
45 | Reading: returns if the application running on the B device | |
46 | is using the bus as host role, otherwise 0. | |
47 | ||
48 | What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_clr_err | |
49 | Date: Feb 2014 | |
50 | Contact: Li Jun <b47624@freescale.com> | |
51 | Description: | |
52 | Only can be set. | |
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. | |
55 | ||
56 | Valid value is "1" |