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Diffstat (limited to 'Documentation/extcon/intel-int3496.txt')
| -rw-r--r-- | Documentation/extcon/intel-int3496.txt | 27 |
1 files changed, 0 insertions, 27 deletions
diff --git a/Documentation/extcon/intel-int3496.txt b/Documentation/extcon/intel-int3496.txt deleted file mode 100644 index 8155dbc7fad3..000000000000 --- a/Documentation/extcon/intel-int3496.txt +++ /dev/null @@ -1,27 +0,0 @@ -Intel INT3496 ACPI device extcon driver documentation ------------------------------------------------------ - -The Intel INT3496 ACPI device extcon driver is a driver for ACPI -devices with an acpi-id of INT3496, such as found for example on -Intel Baytrail and Cherrytrail tablets. - -This ACPI device describes how the OS can read the id-pin of the devices' -USB-otg port, as well as how it optionally can enable Vbus output on the -otg port and how it can optionally control the muxing of the data pins -between an USB host and an USB peripheral controller. - -The ACPI devices exposes this functionality by returning an array with up -to 3 gpio descriptors from its ACPI _CRS (Current Resource Settings) call: - -Index 0: The input gpio for the id-pin, this is always present and valid -Index 1: The output gpio for enabling Vbus output from the device to the otg - port, write 1 to enable the Vbus output (this gpio descriptor may - be absent or invalid) -Index 2: The output gpio for muxing of the data pins between the USB host and - the USB peripheral controller, write 1 to mux to the peripheral - controller - -There is a mapping between indices and GPIO connection IDs as follows - id index 0 - vbus index 1 - mux index 2 |