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56 lines
1.9 KiB
56 lines
1.9 KiB
What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_req |
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Date: Feb 2014 |
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Contact: Li Jun <[email protected]> |
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Description: |
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Can be set and read. |
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Set a_bus_req(A-device bus request) input to be 1 if |
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the application running on the A-device wants to use the bus, |
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and to be 0 when the application no longer wants to use |
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the bus(or wants to work as peripheral). a_bus_req can also |
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be set to 1 by kernel in response to remote wakeup signaling |
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from the B-device, the A-device should decide to resume the bus. |
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Valid values are "1" and "0". |
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Reading: returns 1 if the application running on the A-device |
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is using the bus as host role, otherwise 0. |
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What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_drop |
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Date: Feb 2014 |
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Contact: Li Jun <[email protected]> |
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Description: |
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Can be set and read |
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The a_bus_drop(A-device bus drop) input is 1 when the |
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application running on the A-device wants to power down |
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the bus, and is 0 otherwise, When a_bus_drop is 1, then |
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the a_bus_req shall be 0. |
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Valid values are "1" and "0". |
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Reading: returns 1 if the bus is off(vbus is turned off) by |
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A-device, otherwise 0. |
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What: /sys/bus/platform/devices/ci_hdrc.0/inputs/b_bus_req |
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Date: Feb 2014 |
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Contact: Li Jun <[email protected]> |
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Description: |
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Can be set and read. |
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The b_bus_req(B-device bus request) input is 1 during the time |
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that the application running on the B-device wants to use the |
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bus as host, and is 0 when the application no longer wants to |
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work as host and decides to switch back to be peripheral. |
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Valid values are "1" and "0". |
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Reading: returns if the application running on the B device |
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is using the bus as host role, otherwise 0. |
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What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_clr_err |
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Date: Feb 2014 |
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Contact: Li Jun <[email protected]> |
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Description: |
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Only can be set. |
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The a_clr_err(A-device Vbus error clear) input is used to clear |
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vbus error, then A-device will power down the bus. |
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Valid value is "1"
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