From: David Daney <david.daney@cavium.com>
Date: Fri, 14 Nov 2014 14:26:19 +0000 (+0300)
Subject: serial: 8250_dw: Use 64-bit access for OCTEON.
X-Git-Tag: omap-for-v3.19/fixes-rc1~86^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bca2092d78970df3959462d2aae1941e6b24ebdf;p=pandora-kernel.git

serial: 8250_dw: Use 64-bit access for OCTEON.

Although the existing code appears to work on most hardware, the
hardware designers tell us that 8-bit access to the registers is not
guaranteed to be reliable.  Also the OCTEON simulation environments
prohibit 8-bit accesses.

For these reasons, we use __raw_readq/__raw_writeq for OCTEON.  This
code is protected with #ifdef CONFIG_64BIT so it still builds under
configurations lacking readq/writeq.

We can get rid of the #ifdef __BIG_ENDIAN, as under 64-bit accesses,
OCTEON is byte order invariant.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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