From: Lennert Buytenhek <buytenh@wantstofly.org>
Date: Sat, 29 Oct 2005 15:28:28 +0000 (+0100)
Subject: [ARM] 3053/1: introduce ixp2000_reg_wrb (ixp2000_reg_write plus readback)
X-Git-Tag: v2.6.15-rc1~731^2^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b4a1f67fbfb848ded8cf0c6c305224534144ab2d;p=pandora-kernel.git

[ARM] 3053/1: introduce ixp2000_reg_wrb (ixp2000_reg_write plus readback)

Patch from Lennert Buytenhek

Introduce ixp2000_reg_wrb, which is a variant of ixp2000_reg_write
that does a readback from the target register, to make sure that
the write has been flushed out of the write buffer.

Unlike the previous (ineffective) readback in ixp2000_reg_write, this
readback is followed by an instruction that depends on the value of
the readback so that the CPU actually stalls until the readback has
completed.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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