From: Paul Walmsley <paul@pwsan.com>
Date: Sat, 21 Jan 2012 07:27:40 +0000 (-0700)
Subject: tty: serial: OMAP: ensure FIFO levels are set correctly in non-DMA mode
X-Git-Tag: v3.3-rc2~4^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0a697b22252c9d7208b5fb3e9fbd124dd229f1d2;p=pandora-kernel.git

tty: serial: OMAP: ensure FIFO levels are set correctly in non-DMA mode

Ensure FIFO levels are set correctly in non-DMA mode (the default).
This patch will cause a receive FIFO threshold interrupt to be raised when
there is at least one byte in the RX FIFO.  It will also cause a transmit
FIFO threshold interrupt when there is only one byte remaining in the TX
FIFO.

These changes fix the receive interrupt problem and part of the
transmit interrupt problem.  A separate set of issues must be worked
around for the transmit path to have a basic level of functionality; a
subsequent patch will address these.

DMA operation is unaffected by this patch.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Govindraj Raja <govindraj.r@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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