From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Mon, 20 Oct 2014 18:34:19 +0000 (-0700)
Subject: staging: comedi: addi_apci_3120: remove analog output reset
X-Git-Tag: omap-for-v3.19/fixes-rc1~73^2~807
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b9ae204658334a4a34a60dd2de6ba0415b3a79d4;p=pandora-kernel.git

staging: comedi: addi_apci_3120: remove analog output reset

The apci3120_reset() function is called at the end of the (*auto_attach) and
with the (*detach) is called to unload the driver. Part of this function
resets all the analog output channels to 0V.

There are two problems with this.
1) Only the APCI-3120 has analog outputs, the APCI-3001 does not.
2) The DA_READY bit in the status register needs to be checked before each
   write to update the analog outputs. It's unknown what the DA_READY bit
   does on the APCI-3001 board.

Just remove the analog output reset to avoid any problems.

Also, remove the unnecessary udelay() in apci3120_reset().

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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