From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Wed, 08 Jan 2025 16:32:36 +0100 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 1tVY2t-000nFU-21 for lore@lore.pengutronix.de; Wed, 08 Jan 2025 16:32:36 +0100 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 1tVY2t-00064q-Hj for lore@pengutronix.de; Wed, 08 Jan 2025 16:32:36 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: Content-Transfer-Encoding:Content-Type:In-Reply-To:From:References: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=RJjWXdAcUPMORloUIj3AC0Me0wbD5NAVBykUOYyGfNE=; b=kFLMnTYp5DYCP9 jbZm7VwzVQg7MWwqny5x5l6uhZK8Ur9idlQZq4q5Dz/wk1gCnxV+PtwaSBlbbesDtszIwuG+qdpoT gBpJa+cuRMTsvVTnlqbQ/kGKVWXq1OrqXyOl5ducNub+DxGGnJGLj1FyYqcLsIkXiLWMmDjHxEUM+ ULbftkb9DgmoOJEYoZx1lQGo63ojuwy/7Wbo5TmTWRozqa7la/JOIWVW9T9rLuuZQmsV547u/Ktmg sJBtv0dbHwGdfoa3efkEv/gWOunEQad5Qwmxkug/A06eWz40+I91cJwqr1zoJOrIzKJIQZwgkAocH PgHTrkFp3ndfInRLFNJA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tVY2P-00000008ykT-1zeA; Wed, 08 Jan 2025 15:32:05 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tVY21-00000008yhR-3pGc for barebox@lists.infradead.org; Wed, 08 Jan 2025 15:31:43 +0000 Received: from ptz.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::77] helo=[127.0.0.1]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1tVY20-0005qu-Jh; Wed, 08 Jan 2025 16:31:40 +0100 Message-ID: Date: Wed, 8 Jan 2025 16:31:40 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Konstantin Kletschke References: <63ac6399-be23-40c5-a2d4-d995999b5d7a@pengutronix.de> Content-Language: en-US From: Ahmad Fatoum In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250108_073141_959784_45AF95E5 X-CRM114-Status: GOOD ( 21.43 ) 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: , Cc: barebox@lists.infradead.org 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=-5.3 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: [PATCH] ARM: beaglebone: add delay in lowlevel.c 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) On 08.01.25 16:27, Konstantin Kletschke wrote: > More like this? > > On Wed, Jan 08, 2025 at 04:19:49PM +0100, Ahmad Fatoum wrote: >> >> It would be nice to have the comment more verbose. e.g. that this issue >> was observed on new Seeed-produced BBBs is an intersting info IMO. > > arch/arm/boards/beaglebone/lowlevel.c | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/arch/arm/boards/beaglebone/lowlevel.c b/arch/arm/boards/beaglebone/lowlevel.c > index 5dc49dfaaf..7dc338d03a 100644 > --- a/arch/arm/boards/beaglebone/lowlevel.c > +++ b/arch/arm/boards/beaglebone/lowlevel.c > @@ -97,6 +97,12 @@ extern char __dtb_z_am335x_boneblack_start[]; > extern char __dtb_z_am335x_bone_common_start[]; > extern char __dtb_z_am335x_bone_start[]; > > +static void __udelay(int us) > +{ > + volatile int i; > + for (i = 0; i < us; i++); > +} > + > /** > * @brief The basic entry point for board initialization. > * > @@ -135,6 +141,12 @@ static noinline int beaglebone_sram_init(void) > am33xx_enable_uart0_pin_mux(); > omap_debug_ll_init(); > putc_ll('>'); > + /* > + * Some (~5%) Beaglebone Black received from SEEED in batches > + * after autumn 2024 require a delay to be able to warm start > + * after reset Sounds good. Please add Link: https://lore.barebox.org/barebox/Z0gywL2hLcIDoLQ8@hephaistos/ to your commit message before the S-o-b and then it's good to go, I think. Thanks, Ahmad > + */ > + __udelay(3000); > > barebox_arm_entry(0x80000000, sdram_size, fdt); > } > > > > > -- 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 |