From mboxrd@z Thu Jan 1 00:00:00 1970 From: Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= Subject: Re: [PATCH 0/3] s/FOOTBRIDGE/ARCH_FOOTBRIDGE/ Date: Wed, 2 Jul 2014 09:13:12 +0200 Message-ID: <20140702071312.GO14781@pengutronix.de> References: <1404247026-379-1-git-send-email-u.kleine-koenig@pengutronix.de> <20140701221428.GC32514@n2100.arm.linux.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from metis.ext.pengutronix.de ([92.198.50.35]:54828 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750757AbaGBHN3 (ORCPT ); Wed, 2 Jul 2014 03:13:29 -0400 Content-Disposition: inline In-Reply-To: <20140701221428.GC32514@n2100.arm.linux.org.uk> Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Russell King - ARM Linux Cc: kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org, Wim Van Sebroeck , linux-watchdog@vger.kernel.org, Greg Kroah-Hartman , linux-serial@vger.kernel.org Hello Russell, On Tue, Jul 01, 2014 at 11:14:28PM +0100, Russell King - ARM Linux wrot= e: > On Tue, Jul 01, 2014 at 10:37:03PM +0200, Uwe Kleine-K=F6nig wrote: > > I'm not sure that FOOTBRIDGE and ARCH_FOOTBRIDGE are semantically > > identical; if not, feel free to nack this series. >=20 > CONFIG_FOOTBRIDGE means that we have a DC21285 in the system. We > used to have ARCH_FOOTBRIDGE and ARCH_CO285 which both selected > CONFIG_FOOTBRIDGE. >=20 > ARCH_FOOTBRIDGE was for either host or addin mode using a PAGE_OFFSET > of 0xc0000000. ARCH_CO285 had a PAGE_OFFSET of 0x80000000 as they > wanted to be able to map almost all of PCI memory space. >=20 > So think of CONFIG_FOOTBRIDGE as meaning that we have the physical > device, and CONFIG_ARCH_FOOTBRIDGE meaning that we want to support > boards with the device on. I expected something like that. Is it possible to "have" the device on = a cpu !=3D StrongARM? If so I wonder why ARCH_FOOTBRIDGE is a "ARM system type". And if not, wouldn't it be possible and better to have all platforms which select CPU_SA110 (ARCH_EBSA110, ARCH_FOOTBRIDGE; what about RPC?) in a single mach dir and make FOOTBRIDGE an option there? It's hard to find information on the net about these chips, even http://developer.intel.com/design/strong/sa110.htm only talks about x86 stuff only, so please excuse my unknowingness. =20 > So, it may make sense to rename CONFIG_FOOTBRIDGE to CONFIG_DC21285 > if that makes the configuration symbol intention clearer. Maybe even better CONFIG_HAS_DC21285? Best regards Uwe --=20 Pengutronix e.K. | Uwe Kleine-K=F6nig = | Industrial Linux Solutions | http://www.pengutronix.de/= | -- To unsubscribe from this list: send the line "unsubscribe linux-serial"= in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html