From patchwork Mon Oct 31 22:48:08 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vineet Gupta X-Patchwork-Id: 689684 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 3t78fz1fJtz9snm for ; Tue, 1 Nov 2016 09:48:59 +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 1c1LNx-00019D-AW; Mon, 31 Oct 2016 22:48:57 +0000 Received: from smtprelay2.synopsys.com ([198.182.60.111] helo=smtprelay.synopsys.com) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1c1LNv-00017F-7u for linux-snps-arc@lists.infradead.org; Mon, 31 Oct 2016 22:48:56 +0000 Received: from mailhost.synopsys.com (mailhost3.synopsys.com [10.12.238.238]) by smtprelay.synopsys.com (Postfix) with ESMTP id 357A510C1152; Mon, 31 Oct 2016 15:48:34 -0700 (PDT) Received: from mailhost.synopsys.com (localhost [127.0.0.1]) by mailhost.synopsys.com (Postfix) with ESMTP id 1E78B53A; Mon, 31 Oct 2016 15:48:34 -0700 (PDT) Received: from US01WXQAHTC1.internal.synopsys.com (us01wxqahtc1.internal.synopsys.com [10.12.238.230]) by mailhost.synopsys.com (Postfix) with ESMTP id 09DD4538; Mon, 31 Oct 2016 15:48:34 -0700 (PDT) Received: from IN01WEHTCA.internal.synopsys.com (10.144.199.104) by US01WXQAHTC1.internal.synopsys.com (10.12.238.230) with Microsoft SMTP Server (TLS) id 14.3.266.1; Mon, 31 Oct 2016 15:48:33 -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 04:18:33 +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 04:18:32 +0530 From: Vineet Gupta To: Daniel Lezcano Subject: [PATCH 1/9] ARC: timer: gfrc, rtc: Read BCR to detect whether hardware exists ... Date: Mon, 31 Oct 2016 15:48:08 -0700 Message-ID: <1477954096-770-2-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_404202_38A8E641 X-CRM114-Status: UNSURE ( 9.01 ) X-CRM114-Notice: Please train this message. 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This paves wat for moving this code in drivers/clocksource/ Signed-off-by: Vineet Gupta --- arch/arc/kernel/time.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c index f927b8dc6edd..a2db010cde18 100644 --- a/arch/arc/kernel/time.c +++ b/arch/arc/kernel/time.c @@ -118,10 +118,11 @@ static struct clocksource arc_counter_gfrc = { static int __init arc_cs_setup_gfrc(struct device_node *node) { - int exists = cpuinfo_arc700[0].extn.gfrc; + struct mcip_bcr mp; int ret; - if (WARN(!exists, "Global-64-bit-Ctr clocksource not detected")) + READ_BCR(ARC_REG_MCIP_BCR, mp); + if (WARN(!mp.gfrc, "Global-64-bit-Ctr clocksource not detected")) return -ENXIO; ret = arc_get_timer_clk(node); @@ -174,10 +175,11 @@ static struct clocksource arc_counter_rtc = { static int __init arc_cs_setup_rtc(struct device_node *node) { - int exists = cpuinfo_arc700[smp_processor_id()].extn.rtc; + struct bcr_timer timer; int ret; - if (WARN(!exists, "Local-64-bit-Ctr clocksource not detected")) + READ_BCR(ARC_REG_TIMERS_BCR, timer); + if (WARN(!timer.rtc, "Local-64-bit-Ctr clocksource not detected")) return -ENXIO; /* Local to CPU hence not usable in SMP */