From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 01 Nov 2021 10:11:33 +0100 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1mhTLp-00077k-Sl for lore@lore.pengutronix.de; Mon, 01 Nov 2021 10:11:33 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mhTLp-0005mE-2a for lore@pengutronix.de; Mon, 01 Nov 2021 10:11:33 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:From:In-Reply-To:MIME-Version: References:Message-ID:Subject:Cc:To:Date:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=3RQ8UuoDIef9GshkokE4fkEtn8UCzI6xHVdxUY8WyS8=; b=1ztbWOT76q4fU6Dqp3nNID+5uQ OJopAMdkKJDyTL5x/IBKlr+NVK/1Y35ysI7TRxKbv1z87JSjkA0TkHf7thZs8+zIPrgcZn1bBR3Am xIBU0qXNClveWYT7d2RxLV54X3Yx98rJaOKcd6x3+J0iTKvb3ZjcHPR7pG6+PacHtkZ8Rv218A6q+ ey2GxdqY8C64O4PsxA6A+8eFomgQnsm+QUGMoJNyi8WDSE+9bwsbOANi7I32xZndoziys6HrVR4Mu OlhkUZfKs9X1ynvOWYVP6Kl/f8uinbcbHT+hZlVqCWRc8LhWEDY8JZpoqjrjKDLYb8s+74/05KXW4 O52xCIdA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mhTKe-00Fkg8-UG; Mon, 01 Nov 2021 09:10:21 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mhTKZ-00FkfO-F1 for barebox@lists.infradead.org; Mon, 01 Nov 2021 09:10:16 +0000 Received: from ptx.hi.pengutronix.de ([2001:67c:670:100:1d::c0]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mhTKY-0005QF-7A; Mon, 01 Nov 2021 10:10:14 +0100 Received: from sha by ptx.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1mhTKX-0000op-TY; Mon, 01 Nov 2021 10:10:13 +0100 Date: Mon, 1 Nov 2021 10:10:13 +0100 To: Ahmad Fatoum Cc: barebox@lists.infradead.org Message-ID: <20211101091013.GR25698@pengutronix.de> References: <20211030141934.2207659-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20211030141934.2207659-1-a.fatoum@pengutronix.de> X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-IRC: #ptxdist @freenode X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-Uptime: 10:10:00 up 256 days, 12:33, 130 users, load average: 0.17, 0.17, 0.17 User-Agent: Mutt/1.10.1 (2018-07-13) From: Sascha Hauer X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211101_021015_525296_94FE1FEF X-CRM114-Status: GOOD ( 23.93 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:e::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.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.8 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: [PATCH master] ARM: i.MX8M: nxp-imx8mn-evk: use regular i2c read for device detection X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) On Sat, Oct 30, 2021 at 04:19:34PM +0200, Ahmad Fatoum wrote: > The barebox-nxp-imx8mn-evk image supports both DDR4 and LPDDR4 variants > by probing for the PMIC in use as the former uses a BD71847 and the > latter a PCA9450B. > > The PCA9450B was observed to hang on the 0-byte (probe) reads. > This results in I/O errors during later PMIC writes and the image > would only boot on the EVKs with DDR4, which have the other PMIC. > > Fix this by switching to a 1 byte read instead. Change tested on > i.MX8MN DDR4 EVK as well as another board with LPDDR4. > > While at it, note the address of the PMIC in the error message, so it's > clear, what the result of the i2c probe was. > > Signed-off-by: Ahmad Fatoum > --- > arch/arm/boards/nxp-imx8mn-evk/lowlevel.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) Applied, thanks Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox