From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: Re: [PATCH 7/7] serial/8250: make PIO support optional Date: Mon, 4 Jul 2011 22:37:05 +0200 Message-ID: <201107042237.05295.arnd@arndb.de> References: <1309211120-2803-1-git-send-email-arnd@arndb.de> <201107042127.31649.arnd@arndb.de> <20110704205336.09547e1f@lxorguk.ukuu.org.uk> Mime-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from moutng.kundenserver.de ([212.227.126.187]:58244 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751438Ab1GDUhr (ORCPT ); Mon, 4 Jul 2011 16:37:47 -0400 In-Reply-To: <20110704205336.09547e1f@lxorguk.ukuu.org.uk> Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Alan Cox Cc: Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org On Monday 04 July 2011 21:53:36 Alan Cox wrote: > > Ok, makes sense. If I split this out to the ISA driver, I would > > probably also disallow changing io_type, as ISA 8250 ports are > > all based on PIO mode. > > Alas not, they also come in MMIO form now and then, not often but just > enough to be annoyingly unignorable. However the ISA driver can handle > that 'in-house' and I've never seen anything but PIO or simple MMIO. Ok. How are people using those ISA cards today? The version of setserial that I found is not able to set MMIO mode on those. I suppose you are not talking about isapnp cards, right? Those should not need to be handled through the ISA driver at all. Arnd