diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/firmware-guide/acpi/extcon-intel-int3496.rst (renamed from Documentation/extcon/intel-int3496.txt) | 14 | ||||
| -rw-r--r-- | Documentation/firmware-guide/acpi/index.rst | 1 |
2 files changed, 11 insertions, 4 deletions
diff --git a/Documentation/extcon/intel-int3496.txt b/Documentation/firmware-guide/acpi/extcon-intel-int3496.rst index 8155dbc7fad3..5137ca834b54 100644 --- a/Documentation/extcon/intel-int3496.txt +++ b/Documentation/firmware-guide/acpi/extcon-intel-int3496.rst @@ -1,5 +1,6 @@ +===================================================== 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 @@ -13,15 +14,20 @@ 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 +======= ===================================================================== +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 +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 + ======= ======= diff --git a/Documentation/firmware-guide/acpi/index.rst b/Documentation/firmware-guide/acpi/index.rst index ae609eec4679..90c90d42d9ad 100644 --- a/Documentation/firmware-guide/acpi/index.rst +++ b/Documentation/firmware-guide/acpi/index.rst @@ -24,3 +24,4 @@ ACPI Support acpi-lid lpit video_extension + extcon-intel-int3496 |