From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 27 Apr 2026 14:14:36 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wHKrD-00GwMs-2t for lore@lore.pengutronix.de; Mon, 27 Apr 2026 14:14:35 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1wHKrD-0001ms-5L for lore@pengutronix.de; Mon, 27 Apr 2026 14:14:35 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=rUnhVNzWcIYjrmdbnyyvQmqBy4q/eiRL+tPm5kB4gyI=; b=n6nugwMAe6aSpbK0OVhe46oOst rrK/QzuYZ53r4h5AXi/WGnBC/t2sgZ0VsLFij3R0p/GDePyh2dtOHnNY1J/gR0+HyxmhA1jJNL0id KZaXNr0jzLllSobT0qw6ye315k2otvxxiihIlOnY6eKxPeWxd7Ec6qF2t3N3cyJUM/uW6vbQL5NbH ZSuM6AP6L+1qnvkoTt42+gAuG1Cwks3R6PbEShWl99zUIfUvsFha3KZm2rcy25BJANuib2hrPD2yf Zx+SpQE9Vd+3sJDEcpE5E4dYd2PyX3IyC0Pn0l6P4McyISt0W/ZyVLnCmQatWjh/qblREXLeeDr25 x8W94Vww==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHKqa-0000000Grjl-0Yvn; Mon, 27 Apr 2026 12:13:56 +0000 Received: from cczrelay02.in2p3.fr ([134.158.66.152] helo=cczrelay04.in2p3.fr) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHKqW-0000000Grid-2wcW for barebox@lists.infradead.org; Mon, 27 Apr 2026 12:13:54 +0000 Received: from [134.158.124.135] (clrelecpo09w.in2p3.fr [134.158.124.135]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by cczrelay04.in2p3.fr (Postfix) with ESMTPSA id 3B8DE800379; Mon, 27 Apr 2026 14:13:49 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 cczrelay04.in2p3.fr 3B8DE800379 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=in2p3.fr; s=20260401; t=1777292029; bh=rUnhVNzWcIYjrmdbnyyvQmqBy4q/eiRL+tPm5kB4gyI=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=YG/Tc0HVDL9Y5VNds0K7TocdeYGTML4iBG4kzDTb9dcnGua2WY3UiI3ZjS9Opg+oc bx4659Whk6HOkC7Zv5h/T6IxX0KUQiW4hBhcrdGIDPR77qW5oFd7Ne2eEx6lh88b8Y 6MRWdSVWWT2XcfQRVXiHG9D99tHYnUacp8Vang6VefMVJKgO9B9PcsKEYdcF6BK+6w 6/ni22pHyU7/hZWh30qfDaphbDRZJez2KZ5Pu/YQ4f3jYnqCIGqCtNoTtTtnihzTwK IebksUy3KOLtcPFzv58oLyizvhxy9b7Z8qWo46GiiUy6ArWJjfmT/jazoBQd7uGCmV 2ndWyEOUhPx7A== Message-ID: Date: Mon, 27 Apr 2026 14:13:48 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Steffen Trumtrar Cc: ML_Barebox , abbotti@mev.co.uk References: <87mrysizs9.fsf@pengutronix.de> <09c2d997-08e5-484a-a7ea-3204b304f3b8@clermont.in2p3.fr> <871pg0vh4t.fsf@pengutronix.de> From: David Picard Content-Language: en-US In-Reply-To: <871pg0vh4t.fsf@pengutronix.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260427_051353_142903_9A2E376C X-CRM114-Status: GOOD ( 29.43 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.3 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: ARM: socfpga: enclustra-sa2: issue with I2C1 X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) Too bad you don't have an idea. Sorry for misspelling your name, I'm not sure it's related, but I get errors with the socfpga_import_preloader script only if I use the --embedded-sdk option. I couldn't figure out what this option changes. https://paste.debian.net/hidden/fffbb190 David Le 27/04/2026 à 12:20, Steffen Trumtrar a écrit : > On 2026-04-27 at 12:09 +02, David Picard > wrote: > > Hi, > >> Hi Stephen, thanks for your reply, >> >> Pins SDA and SCL, GPIO51 and GPIO52 respectively, are specified with >> the I/O >> standard 3.3V LVCMOS and a drive strength of 2mA, which is way more >> than needed, >> given my 10K pull-up resistors (3.3 / 10K = 0.33mA). I know that 10K >> is bigger >> than the usual 2.2K, but probably not big enough to prevent any >> change on the >> SCL line. I just see a perfect flat line when I probe the bus. >> > > :( > >> I compared iocsr_config_cyclone5.c and pinmux_config.c in the >> terasic-de10-nano/ >> and enclustra-sa2/ directories. There are a lot of differences. But >> the lines >> that changed in enclustra-sa2/ when I tried to enable the I2C1 bus >> are now the >> same as in the terasic-de10-nano/ directory, which probably makes sense. >> > > Makes sence, yes and was what I hoped for. But, doesn't seem to change > anything. > >> Does Barebox have to decipher every bit in those cryptic files? >> > > barebox knows nothing about the meaning of the iocsr registers. Those > values a just written to the hardware and can't be changed afterwards. > AFAIK there still is no linux driver that might read and decipher the > settings. > > Sadly, I don't have any more ideas at the top of my head why it > doesn't work. Everything sounds correct. > > > Best regards, > Steffen > >> >> David >> >> >> Le 24/04/2026 à 09:27, Steffen Trumtrar a écrit : >> > On 2026-04-23 at 14:00 +02, David Picard >> >> > wrote: >> > >> > Hi, >> > >> >> Hello, >> >> >> >> @Stephen and Ian: I Cc you since I spotted you authored commits >> related to >> >> Intel >> >> SoC FPGA pin muxing. >> >> >> > >> > long time ago ;) >> > >> >> I'm trying to enable the I2C1 bus on a Cyclone V-base module, >> mounted on a >> >> base >> >> board. The I2C1 lines connect to a 2.54mm header, on which I >> attached a I²C >> >> device with pull-up resistors at address 0x40. >> >> >> https://www.enclustra.com/en/products/system-on-chip-modules/mercury-sa2/ >> I >> >> can't detect the I²C device, nor can I see any pulse on the SCL >> line, which >> >> is >> >> constantly at +3.3V. >> >> >> >> I changed the pin muxing in Quartus, updated the handoff files, >> changed the >> >> devicetree. The I2C1 bus is visible in Barebox and Linux. More >> detail here: >> >> >> https://community.altera.com/discussions/fpga-device/cyclone-v-hps-i2c1-issue-no-activity-on-bus/352583 >> > >> > I remember, that iocsr was 'underdocumented' to say the least... >> > >> > Wasn't it possible to change drive strength and those settings or >> was that >> > with Xilinx/Zynq? >> > >> >> As documented on the Barebox website, I generated the BSP files >> with the >> >> Quartus >> >> script bsp-create-settings and copied the handoff files to the >> Barebox build >> >> directory. After that, I could see that iocsr_config_cyclone5.c and >> >> pinmux_config.c had changed. >> >> >> https://www.barebox.org/doc/2025.05.0/boards/socfpga.html#updating-handoff-files >> >> >> https://www.intel.com/content/www/us/en/docs/programmable/683187/20-1/bsp-create-settings.html >> >> If someone could give me some hint, that would be really great! >> > >> > I see, that the Terasic DE10 Nano uses i2c1. Maybe compare the >> changed iocsr >> > with those? >> > >> > >> > Best regards, >> > Steffen >> > >