From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jptsE-0000Yy-KE for barebox@lists.infradead.org; Mon, 29 Jun 2020 13:31:03 +0000 References: <925732743.424285.1592919941556@mail.vodafone.de> <245646662.425432.1592925096458@mail.vodafone.de> <517310923.70062.1593427992397@mail.vodafone.de> From: Ahmad Fatoum Message-ID: <595dc8c8-09c8-81ad-d730-23781e207cbd@pengutronix.de> Date: Mon, 29 Jun 2020 15:30:59 +0200 MIME-Version: 1.0 In-Reply-To: <517310923.70062.1593427992397@mail.vodafone.de> Content-Language: en-US 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" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: reset / watchdog on an imx7d soc To: Giorgio Dal Molin , Fabio Estevam Cc: Barebox List Hello, On 6/29/20 12:53 PM, Giorgio Dal Molin wrote: > Hi, > >> On June 29, 2020 at 10:44 AM Ahmad Fatoum wrote: >> >> >> Hello Giorgio, >> >> On 6/23/20 5:11 PM, Giorgio Dal Molin wrote: >>> Hi Fabio, >>> >>> thank you for your quick reply. >>> >>> I've already found the errata you linked in your mail but I had no success >>> applying the suggestion there; maybe I'm doing it wrong. >>> Let's take the Option 3 there: >> >> Does reset within Linux (with say the imx_v6_v7_defconfg) work? > > No. I see the same behavior also with the kernel: after a 'shutdown -r' > the system 'goes down' but doesn't reboot, it just hang: > > ~ # shutdown -r > system is going down for reboot NOW > ... > [ 46.248222] 000: ci_hdrc ci_hdrc.0: remove, state 1 > [ 46.248253] 000: usb usb1: USB disconnect, device number 1 > [ 46.248263] 000: usb 1-1: USB disconnect, device number 2 > > > The same happens if I kill the 'watchdog' process: after ~2 seconds > the system just hangs. > > I'm sure there must be a solution because the original u-boot bootloader > for the cpu module I'm using reboots the system as expected, through the wdog1; > unfortunately it's not so trivial to find what makes the difference. Linux probably attempts reset via PSCI. Check for psci_system_reset in your vendor's U-Boot and transplant it into barebox. > > giorgio > > >> >> -- >> 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 > -- 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