From patchwork Tue Jun 18 00:08:49 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dinh Nguyen X-Patchwork-Id: 2738011 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 28DFCC0AB1 for ; Tue, 18 Jun 2013 00:10:51 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 31D9120562 for ; Tue, 18 Jun 2013 00:10:50 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8A6AD20553 for ; Tue, 18 Jun 2013 00:10:48 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UojVB-0005R4-AW; Tue, 18 Jun 2013 00:10:25 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UojUt-0008V3-TK; Tue, 18 Jun 2013 00:10:07 +0000 Received: from ch1ehsobe005.messaging.microsoft.com ([216.32.181.185] helo=ch1outboundpool.messaging.microsoft.com) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UojUq-0008Uc-Ta for linux-arm-kernel@lists.infradead.org; Tue, 18 Jun 2013 00:10:05 +0000 Received: from mail28-ch1-R.bigfish.com (10.43.68.226) by CH1EHSOBE009.bigfish.com (10.43.70.59) with Microsoft SMTP Server id 14.1.225.23; Tue, 18 Jun 2013 00:09:44 +0000 Received: from mail28-ch1 (localhost [127.0.0.1]) by mail28-ch1-R.bigfish.com (Postfix) with ESMTP id 5DACC2201AC; Tue, 18 Jun 2013 00:09:44 +0000 (UTC) X-Forefront-Antispam-Report: CIP:66.35.236.232; KIP:(null); UIP:(null); IPV:NLI; H:SJ-ITEXEDGE02.altera.priv.altera.com; RD:none; EFVD:NLI X-SpamScore: 0 X-BigFish: VS0(zzzz1f42h1ee6h1de0h1fdah1202h1e76h1d1ah1d2ah1fc6hzz8275ch8275bh8275dhz2fh2a8h668h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h14ddh1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1d0ch1d2eh1d3fh1dfeh1dffh1e1dh1e23h1155h) Received-SPF: pass (mail28-ch1: domain of altera.com designates 66.35.236.232 as permitted sender) client-ip=66.35.236.232; envelope-from=dinguyen@altera.com; helo=SJ-ITEXEDGE02.altera.priv.altera.com ; v.altera.com ; Received: from mail28-ch1 (localhost.localdomain [127.0.0.1]) by mail28-ch1 (MessageSwitch) id 1371514141668145_966; Tue, 18 Jun 2013 00:09:01 +0000 (UTC) Received: from CH1EHSMHS040.bigfish.com (snatpool3.int.messaging.microsoft.com [10.43.68.228]) by mail28-ch1.bigfish.com (Postfix) with ESMTP id 957311A00E1; Tue, 18 Jun 2013 00:09:01 +0000 (UTC) Received: from SJ-ITEXEDGE02.altera.priv.altera.com (66.35.236.232) by CH1EHSMHS040.bigfish.com (10.43.69.249) with Microsoft SMTP Server (TLS) id 14.1.225.23; Tue, 18 Jun 2013 00:09:01 +0000 Received: from sj-mail01.altera.com (137.57.1.6) by SJ-ITEXEDGE02.altera.priv.altera.com (66.35.236.232) with Microsoft SMTP Server id 8.3.298.1; Mon, 17 Jun 2013 16:58:50 -0700 Received: from linux-builds1.altera.com (linux-builds1.altera.com [137.57.188.121]) by sj-mail01.altera.com (8.13.7+Sun/8.13.7) with ESMTP id r5I08skJ002660; Mon, 17 Jun 2013 17:08:59 -0700 (PDT) From: To: Subject: [PATCH 2/2] clocksource: dw_apb_timer_of: Fix read_sched_clock Date: Mon, 17 Jun 2013 19:08:49 -0500 Message-ID: <1371514129-22801-3-git-send-email-dinguyen@altera.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1371514129-22801-1-git-send-email-dinguyen@altera.com> References: <1371514129-22801-1-git-send-email-dinguyen@altera.com> MIME-Version: 1.0 X-OriginatorOrg: altera.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130617_201005_011072_BC595ED8 X-CRM114-Status: GOOD ( 14.12 ) X-Spam-Score: -2.6 (--) Cc: Heiko Stuebner , Arnd Bergmann , Pavel Machek , Linus Walleij , Rob Herring , John Stultz , linux-arm-kernel@lists.infradead.org, Olof Johansson , Jamie Iles , Thomas Gleixner , Dinh Nguyen X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Dinh Nguyen The read_sched_clock should return the ~value because the clock is a countdown implementation. read_sched_clock() should be the same as __apbt_read_clocksource(). If a separate timer for the sched_clock exist, then read_sched_clock() will return an incorrect value. The (sched_io_base + 0x4) needs to be in the function for both cases. Also, remove the use of "dw-apb-timer-sp" and "dw-apb-timer-osc" since they are the same DW clock. Signed-off-by: Dinh Nguyen CC: Rob Herring CC: Arnd Bergmann Cc: Olof Johansson CC: Jamie Iles Cc: John Stultz Cc: Thomas Gleixner Cc: Linus Walleij Cc: Pavel Machek Cc: Heiko Stuebner Cc: linux-arm-kernel@lists.infradead.org Acked-by: Jamie Iles --- drivers/clocksource/dw_apb_timer_of.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/clocksource/dw_apb_timer_of.c b/drivers/clocksource/dw_apb_timer_of.c index cef5544..8dcbd4e 100644 --- a/drivers/clocksource/dw_apb_timer_of.c +++ b/drivers/clocksource/dw_apb_timer_of.c @@ -104,18 +104,17 @@ static void add_clocksource(struct device_node *source_timer) * timer is found. sched_io_base then points to the current_value * register of the clocksource timer. */ - sched_io_base = iobase + 0x04; + sched_io_base = iobase; sched_rate = rate; } static u32 read_sched_clock(void) { - return __raw_readl(sched_io_base); + return ~__raw_readl(sched_io_base + 0x4); } static const struct of_device_id sptimer_ids[] __initconst = { { .compatible = "picochip,pc3x2-rtc" }, - { .compatible = "snps,dw-apb-timer-sp" }, { /* Sentinel */ }, }; @@ -155,4 +154,4 @@ static void __init dw_apb_timer_init(struct device_node *timer) num_called++; } CLOCKSOURCE_OF_DECLARE(pc3x2_timer, "picochip,pc3x2-timer", dw_apb_timer_init); -CLOCKSOURCE_OF_DECLARE(apb_timer, "snps,dw-apb-timer-osc", dw_apb_timer_init); +CLOCKSOURCE_OF_DECLARE(apb_timer, "snps,dw-apb-timer", dw_apb_timer_init);