From patchwork Tue Nov 15 13:13:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: fu.wei@linaro.org X-Patchwork-Id: 9429813 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D8ACD6047D for ; Tue, 15 Nov 2016 13:22:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C42F22897B for ; Tue, 15 Nov 2016 13:22:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B84BA28B88; Tue, 15 Nov 2016 13:22:40 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 4AE5D28BE6 for ; Tue, 15 Nov 2016 13:22:40 +0000 (UTC) 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 1c6dfc-0006kn-Fw; Tue, 15 Nov 2016 13:21:04 +0000 Received: from mx1.redhat.com ([209.132.183.28]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1c6dbv-0001u9-Nl for linux-arm-kernel@lists.infradead.org; Tue, 15 Nov 2016 13:17:21 +0000 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B9C358F23F; Tue, 15 Nov 2016 13:16:54 +0000 (UTC) Received: from Rei-Ayanami.localdomain.com (ovpn-8-16.pek2.redhat.com [10.72.8.16]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id uAFDDxGX009274; Tue, 15 Nov 2016 08:16:42 -0500 From: fu.wei@linaro.org To: rjw@rjwysocki.net, lenb@kernel.org, daniel.lezcano@linaro.org, tglx@linutronix.de, marc.zyngier@arm.com, mark.rutland@arm.com, lorenzo.pieralisi@arm.com, sudeep.holla@arm.com, hanjun.guo@linaro.org Subject: [PATCH v15 12/13] clocksource/drivers/arm_arch_timer: Add GTDT support for memory-mapped timer Date: Tue, 15 Nov 2016 21:13:34 +0800 Message-Id: <1479215615-26950-13-git-send-email-fu.wei@linaro.org> In-Reply-To: <1479215615-26950-1-git-send-email-fu.wei@linaro.org> References: <1479215615-26950-1-git-send-email-fu.wei@linaro.org> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Tue, 15 Nov 2016 13:16:55 +0000 (UTC) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161115_051716_592784_7617C0EE X-CRM114-Status: GOOD ( 14.05 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linaro-acpi@lists.linaro.org, catalin.marinas@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, wim@iguana.be, Fu Wei , wei@redhat.com, al.stone@linaro.org, tn@semihalf.com, timur@codeaurora.org, linux-acpi@vger.kernel.org, linux@roeck-us.net, harba@codeaurora.org, julien.grall@arm.com, linux-watchdog@vger.kernel.org, arnd@arndb.de, jcm@redhat.com, cov@codeaurora.org, linux-arm-kernel@lists.infradead.org, graeme.gregory@linaro.org, rruigrok@codeaurora.org, leo.duran@amd.com, Suravee.Suthikulpanit@amd.com, christoffer.dall@linaro.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Fu Wei The patch add memory-mapped timer register support by using the information provided by the new GTDT driver of ACPI. Signed-off-by: Fu Wei --- drivers/clocksource/arm_arch_timer.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 653374c..350d0b9 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -1053,7 +1053,28 @@ CLOCKSOURCE_OF_DECLARE(armv7_arch_timer_mem, "arm,armv7-timer-mem", arch_timer_mem_of_init); #ifdef CONFIG_ACPI_GTDT -/* Initialize per-processor generic timer */ +static int __init arch_timer_mem_acpi_init(void) +{ + struct arch_timer_mem *timer_mem; + int ret = 0; + int i = 0; + + timer_mem = kzalloc(sizeof(*timer_mem), GFP_KERNEL); + if (!timer_mem) + return -ENOMEM; + + while (!gtdt_arch_timer_mem_init(timer_mem, i)) { + ret = arch_timer_mem_init(timer_mem); + if (ret) + break; + i++; + } + + kfree(timer_mem); + return ret; +} + +/* Initialize per-processor generic timer and memory-mapped timer(if present) */ static int __init arch_timer_acpi_init(struct acpi_table_header *table) { int ret; @@ -1090,6 +1111,9 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table) /* Get the frequency from CNTFRQ */ arch_timer_detect_rate(NULL, NULL); + if (arch_timer_mem_acpi_init()) + pr_err("Failed to initialize memory-mapped timer.\n"); + ret = arch_timer_init(); error: