From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Fri, 24 Feb 2023 11:45:21 +0100 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1pVVZn-000iXM-0w for lore@lore.pengutronix.de; Fri, 24 Feb 2023 11:45:21 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pVVZm-0007Js-4n for lore@pengutronix.de; Fri, 24 Feb 2023 11:45:18 +0100 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:From:In-Reply-To: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=xH6dN5kpHzxbkEPu1L56uu7DC7CBdCcSc5YaAOCa/Ts=; b=Qkp/61J91/EO2i/IOPytpX0kbO iFKB36v3T+Lx0Mh44AEiSUTYhUMoocCh0tcXqoeD0/cCaE7TMjlIIscS+oYGLrC2WVthM5+TfnKPu f1QjYKmKgJkVupH9Z2LcjAN/LaJqYH37DYN7+NbOXQH/v1ZyKQZ8onnl0FfXS2hmFpeHqwGpqSq/A Zxxq94UAfNeS//yR2LStRqwrk44Sm7US2tbyV13endi82+ur+/jfawYm0+HzVEmgGprI5Ddr7Tl1C VZ8UntKwTEl/ghYJNreWRihNY5NsTzPTniGMtgdEyw0ogPBjj6nwt2WZtFvV3j2+YL+lwQAB2q/KE lQwoPzaw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pVVYO-0026Gc-6e; Fri, 24 Feb 2023 10:43:52 +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 1pVVYJ-0026F3-DW for barebox@lists.infradead.org; Fri, 24 Feb 2023 10:43:48 +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 1pVVYD-0007Bt-Hz; Fri, 24 Feb 2023 11:43:41 +0100 Received: from sha by ptx.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1pVVYC-0005vx-Nd; Fri, 24 Feb 2023 11:43:40 +0100 Date: Fri, 24 Feb 2023 11:43:40 +0100 To: Renaud Barbier Cc: Barebox List Message-ID: <20230224104340.GI32097@pengutronix.de> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-Accept-Language: de,en X-Accept-Content-Type: text/plain 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-20230224_024347_476598_F5C59198 X-CRM114-Status: GOOD ( 19.50 ) 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.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.7 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: Subject: [PATCH 2/2] ARM: Layerscape: Add LS1021A IOT board support 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 Thu, Feb 23, 2023 at 01:58:46PM +0000, Renaud Barbier wrote: > diff --git a/arch/arm/lib32/pbl.c b/arch/arm/lib32/pbl.c > new file mode 100644 > index 0000000000..f4be7b57dc > --- /dev/null > +++ b/arch/arm/lib32/pbl.c > @@ -0,0 +1,21 @@ > +// SPDX-License-Identifier: GPL-2.0-only > + > +#include > +#include > +#include > + > +void udelay(unsigned long us) > +{ > + unsigned long long ticks, cntfrq = get_cntfrq(); > + unsigned long long start = get_cntpct(); > + > + ticks = us * cntfrq + 999999; > + do_div(ticks, 1000000); > + > + while ((long)(start + ticks - get_cntpct()) > 0); > +} > + > +void mdelay(unsigned long ms) > +{ > + udelay(ms * 1000); > +} This will be compiled for every arm32 build, but the architected timer is not generally available, only a small fraction of CPUs actually have it. I just tested this on a i.MX6 and it just answers with an illegal instruction abort when get_cntfrq() is called. We could name this arm_architected_timer_udelay() or similar. This change should be in a separate patch. 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 |