From patchwork Mon Oct 31 22:48:09 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vineet Gupta X-Patchwork-Id: 689685 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2001:1868:205::9]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3t78g02Kw3z9snm for ; Tue, 1 Nov 2016 09:49:00 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1c1LNy-00019R-Ol; Mon, 31 Oct 2016 22:48:58 +0000 Received: from smtprelay.synopsys.com ([198.182.60.111]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1c1LNv-00017G-81 for linux-snps-arc@lists.infradead.org; Mon, 31 Oct 2016 22:48:56 +0000 Received: from mailhost.synopsys.com (mailhost2.synopsys.com [10.13.184.66]) by smtprelay.synopsys.com (Postfix) with ESMTP id D6F5A10C1119; Mon, 31 Oct 2016 15:48:38 -0700 (PDT) Received: from mailhost.synopsys.com (localhost [127.0.0.1]) by mailhost.synopsys.com (Postfix) with ESMTP id C5C59E1C; Mon, 31 Oct 2016 15:48:38 -0700 (PDT) Received: from us01wehtc1.internal.synopsys.com (us01wehtc1.internal.synopsys.com [10.12.239.235]) by mailhost.synopsys.com (Postfix) with ESMTP id B7D4DE1B; Mon, 31 Oct 2016 15:48:38 -0700 (PDT) Received: from IN01WEHTCA.internal.synopsys.com (10.144.199.104) by us01wehtc1.internal.synopsys.com (10.12.239.231) with Microsoft SMTP Server (TLS) id 14.3.266.1; Mon, 31 Oct 2016 15:48:38 -0700 Received: from IN01WEHTCB.internal.synopsys.com (10.144.199.105) by IN01WEHTCA.internal.synopsys.com (10.144.199.103) with Microsoft SMTP Server (TLS) id 14.3.266.1; Tue, 1 Nov 2016 04:18:35 +0530 Received: from vineetg-Latitude-E7450.internal.synopsys.com (10.10.161.40) by IN01WEHTCB.internal.synopsys.com (10.144.199.243) with Microsoft SMTP Server (TLS) id 14.3.266.1; Tue, 1 Nov 2016 04:18:35 +0530 From: Vineet Gupta To: Daniel Lezcano Subject: [PATCH 2/9] ARC: timer: rtc: implement read loop in "C" vs. inline asm Date: Mon, 31 Oct 2016 15:48:09 -0700 Message-ID: <1477954096-770-3-git-send-email-vgupta@synopsys.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1477954096-770-1-git-send-email-vgupta@synopsys.com> References: <35bde193-8492-83e0-fb03-8385d8afd007@synopsys.com> <1477954096-770-1-git-send-email-vgupta@synopsys.com> MIME-Version: 1.0 X-Originating-IP: [10.10.161.40] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161031_154855_433927_6D4D29D4 X-CRM114-Status: UNSURE ( 7.19 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -3.3 (---) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-3.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [198.182.60.111 listed in wl.mailspike.net] -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [198.182.60.111 listed in list.dnswl.org] -1.4 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Noam Camus , Vineet Gupta , Alexey.Brodkin@synopsys.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, linux-snps-arc@lists.infradead.org Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org To allow for easy movement into drivers/clocksource Signed-off-by: Vineet Gupta --- arch/arc/kernel/time.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c index a2db010cde18..2c51e3cafad0 100644 --- a/arch/arc/kernel/time.c +++ b/arch/arc/kernel/time.c @@ -153,14 +153,11 @@ static cycle_t arc_read_rtc(struct clocksource *cs) cycle_t full; } stamp; - - __asm__ __volatile( - "1: \n" - " lr %0, [AUX_RTC_LOW] \n" - " lr %1, [AUX_RTC_HIGH] \n" - " lr %2, [AUX_RTC_CTRL] \n" - " bbit0.nt %2, 31, 1b \n" - : "=r" (stamp.low), "=r" (stamp.high), "=r" (status)); + do { + stamp.low = read_aux_reg(AUX_RTC_LOW); + stamp.high = read_aux_reg(AUX_RTC_HIGH); + status = read_aux_reg(AUX_RTC_CTRL); + } while (!(status & 0x80000000UL)); return stamp.full; }