From: Max Filippov <jcmvbkbc@gmail.com>
Date: Wed, 25 Dec 2013 12:01:30 +0000 (+0400)
Subject: USB: c67x00: add proper delays to HPI read/write
X-Git-Tag: v3.14-rc1~148^2~36
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8f668fbbd571bbd5187a9a0eae150b768fc388ac;p=pandora-kernel.git

USB: c67x00: add proper delays to HPI read/write

According to CY7C67300 specification HPI read and write cycle duration
Tcyc must be at least 6T long, where T is 1/48MHz, which is 125ns.
Without this delay fast host processor cannot write to chip registers.
Add proper ndelay to hpi_{read,write}_reg.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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