From owner-freebsd-arm@freebsd.org  Wed Mar 31 07:06:51 2021
Return-Path: <owner-freebsd-arm@freebsd.org>
Delivered-To: freebsd-arm@mailman.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.nyi.freebsd.org (Postfix) with ESMTP id 8E4415BD69F
 for <freebsd-arm@mailman.nyi.freebsd.org>;
 Wed, 31 Mar 2021 07:06:51 +0000 (UTC) (envelope-from avg@FreeBSD.org)
Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3])
 by mx1.freebsd.org (Postfix) with ESMTP id 4F9HRv3gnNz4gtM
 for <freebsd-arm@freebsd.org>; Wed, 31 Mar 2021 07:06:51 +0000 (UTC)
 (envelope-from avg@FreeBSD.org)
Received: by mailman.nyi.freebsd.org (Postfix)
 id 7E34B5BCF6A; Wed, 31 Mar 2021 07:06:51 +0000 (UTC)
Delivered-To: arm@mailman.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.nyi.freebsd.org (Postfix) with ESMTP id 7DF955BD784
 for <arm@mailman.nyi.freebsd.org>; Wed, 31 Mar 2021 07:06:51 +0000 (UTC)
 (envelope-from avg@FreeBSD.org)
Received: from relay12.mail.gandi.net (relay12.mail.gandi.net [217.70.178.232])
 (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 4F9HRv1yLwz4gYy
 for <arm@freebsd.org>; Wed, 31 Mar 2021 07:06:50 +0000 (UTC)
 (envelope-from avg@FreeBSD.org)
Received: from [192.168.0.88] (unknown [195.64.148.76])
 (Authenticated sender: andriy.gapon@uabsd.com)
 by relay12.mail.gandi.net (Postfix) with ESMTPSA id 335B4200005;
 Wed, 31 Mar 2021 07:06:47 +0000 (UTC)
Subject: Re: i2c/twsi/allwinner problems.
To: Daniel Braniss <danny@cs.huji.ac.il>,
 "freebsd-arm@freebsd.org" <arm@freebsd.org>
References: <CB54E711-FC72-44E3-BB69-916E470C490E@cs.huji.ac.il>
From: Andriy Gapon <avg@FreeBSD.org>
Message-ID: <4e386f9f-33aa-fa91-0fc3-fd44b34632ed@FreeBSD.org>
Date: Wed, 31 Mar 2021 10:06:47 +0300
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:78.0) Gecko/20100101
 Firefox/78.0 Thunderbird/78.9.0
MIME-Version: 1.0
In-Reply-To: <CB54E711-FC72-44E3-BB69-916E470C490E@cs.huji.ac.il>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 8bit
X-Rspamd-Queue-Id: 4F9HRv1yLwz4gYy
X-Spamd-Bar: ----
Authentication-Results: mx1.freebsd.org;
	none
X-Spamd-Result: default: False [-4.00 / 15.00];
	 REPLY(-4.00)[]
X-BeenThere: freebsd-arm@freebsd.org
X-Mailman-Version: 2.1.34
Precedence: list
List-Id: Porting FreeBSD to ARM processors <freebsd-arm.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-arm>,
 <mailto:freebsd-arm-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arm/>
List-Post: <mailto:freebsd-arm@freebsd.org>
List-Help: <mailto:freebsd-arm-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-arm>,
 <mailto:freebsd-arm-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 31 Mar 2021 07:06:51 -0000

On 30/03/2021 12:58, Daniel Braniss wrote:
> |hi all, after some time, I decided to try FreeBSD 13 on my all winner (nano
> neo) and got it working only with debugging on, so I started cherry picking till
> I got it working, replacing printfs with DELAY and this is is now working, of
> course not the correct solution, but if someone with better i2c knowledge can
> propose a better solution I’m willing to test if with my program (it reads RFIDs
> using a board with PN532),|

I see quite a lot of those "cherry-picks" and they are a mix of explicit delays
and printfs (via debug_).
Also, the driver has completely separate code paths for polling mode and
interrupt mode.  I see that both are heavily modified.
Do you actually use both modes?

-- 
Andriy Gapon