From owner-freebsd-arm@FreeBSD.ORG Thu Jan 29 00:36:06 2015 Return-Path: Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 548B07BC; Thu, 29 Jan 2015 00:36:06 +0000 (UTC) Received: from smtp4.ore.mailhop.org (smtp4.ore.mailhop.org [54.149.240.58]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 2D923BCA; Thu, 29 Jan 2015 00:36:05 +0000 (UTC) Received: from [73.34.117.227] (helo=ilsoft.org) by smtp4.ore.mailhop.org with esmtpsa (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256) (Exim 4.82) (envelope-from ) id 1YGd5X-0005bH-QV; Thu, 29 Jan 2015 00:36:03 +0000 Received: from revolution.hippie.lan (revolution.hippie.lan [172.22.42.240]) by ilsoft.org (8.14.9/8.14.9) with ESMTP id t0T0a0SC029576; Wed, 28 Jan 2015 17:36:00 -0700 (MST) (envelope-from ian@freebsd.org) X-Mail-Handler: DuoCircle Outbound SMTP X-Originating-IP: 73.34.117.227 X-Report-Abuse-To: abuse@duocircle.com (see https://support.duocircle.com/support/solutions/articles/5000540958-duocircle-standard-smtp-abuse-information for abuse reporting information) X-MHO-User: U2FsdGVkX19SQjhCnkSh9HOf2vDrL4cw Message-ID: <1422491760.15718.97.camel@freebsd.org> Subject: Re: System-On-Module From: Ian Lepore To: "Lundberg, Johannes" Date: Wed, 28 Jan 2015 17:36:00 -0700 In-Reply-To: References: <20150128183231.GI58886@cicely7.cicely.de> <1422473251.15718.70.camel@freebsd.org> <20150128201440.GA73589@cicely7.cicely.de> <1422490013.15718.79.camel@freebsd.org> Content-Type: text/plain; charset="us-ascii" X-Mailer: Evolution 3.12.8 FreeBSD GNOME Team Port Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Cc: "freebsd-arm@freebsd.org" , FreeBSD Current , ticso@cicely.de, "freebsd-mobile@freebsd.org" X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Jan 2015 00:36:06 -0000 On Thu, 2015-01-29 at 09:12 +0900, Lundberg, Johannes wrote: > Ah now I see it has EDM connection. I didn't look carefully enough. All the > images are with the expansion board attached.. > > Spec-wise and portability-wise it seems like a good option but my hardware > guy keeps warning me about Freescale that they often have hardware bugs and > rather than fixing the bugs they pretend they are not there.. In other > words, Freescale is good for software developers because of open > documentation but not so for hardware manufactures. Any experiences with > this? The imx6 manuals include an errata list, so it would be good to check that for anything specific that would matter to your projects. For the devices we use in our products everything is good so far with the hardware. That's emmc, sdcard, ethernet, i2c, uarts, usb, and lots of gpio (inputs and outputs). The ethernet is gigabit but has a known limitation of 40MB/s due to the bus it's connected to in the chip. (But hey, it's documented so it's not a problem, right? :) You mentioned video, and we don't have that working on freebsd imx6 yet, but there's not a ton of work to do. There's a framebuffer driver for imx5 and it has pretty much the same framebuffer hardware. Getting video output to a TTL LCD is probably just hours of work. Getting it to an LVDS LCD or HDMI probably needs days of work (entire drivers written, potentially, I haven't looked into it). Some audio support was recently committed, but I don't know much about it yet. -- Ian