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README: add documentation for CONFIG_USB_ULPI*

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Add documentation for CONFIG_USB_ULPI and CONFIG_USB_ULPI_VIEWPORT
configuration options.

Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
This commit is contained in:
Igor Grinberg 2011-12-12 12:08:35 +02:00 committed by Remy Bohmer
parent cf9f95f293
commit d70a560fd7
1 changed files with 8 additions and 0 deletions
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@ -1185,6 +1185,14 @@ The following options need to be configured:
for your device
- CONFIG_USBD_PRODUCTID 0xFFFF
- ULPI Layer Support:
The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via
the generic ULPI layer. The generic layer accesses the ULPI PHY
via the platform viewport, so you need both the genric layer and
the viewport enabled. Currently only Chipidea/ARC based
viewport is supported.
To enable the ULPI layer support, define CONFIG_USB_ULPI and
CONFIG_USB_ULPI_VIEWPORT in your board configuration file.
- MMC Support:
The MMC controller on the Intel PXA is supported. To