From: Igor Grinberg <grinberg@compulab.co.il>
Date: Mon, 12 Dec 2011 10:08:35 +0000 (+0200)
Subject: README: add documentation for CONFIG_USB_ULPI*
X-Git-Tag: v2011.12-rc2~5^2~2
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=d70a560fd77b8a357257c7baa0a24b326c097bc3;p=oweals%2Fu-boot.git

README: add documentation for CONFIG_USB_ULPI*

Add documentation for CONFIG_USB_ULPI and CONFIG_USB_ULPI_VIEWPORT
configuration options.

Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
---

diff --git a/README b/README
index ff72e4705f..6fe1e0fc2d 100644
--- a/README
+++ b/README
@@ -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