From patchwork Wed Jan 18 13:25:40 2017 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: 9523881 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 545E4601B7 for ; Wed, 18 Jan 2017 13:37:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 450A928047 for ; Wed, 18 Jan 2017 13:37:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3999E2859B; Wed, 18 Jan 2017 13:37:56 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C1B9F28047 for ; Wed, 18 Jan 2017 13:37:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751842AbdARNg6 (ORCPT ); Wed, 18 Jan 2017 08:36:58 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60196 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752936AbdARNgz (ORCPT ); Wed, 18 Jan 2017 08:36:55 -0500 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (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 11D6211CA20; Wed, 18 Jan 2017 13:29:00 +0000 (UTC) Received: from Rei-Ayanami.localdomain (vpn1-6-23.pek2.redhat.com [10.72.6.23]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v0IDPrWu011402; Wed, 18 Jan 2017 08:28:49 -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 Cc: linux-arm-kernel@lists.infradead.org, linaro-acpi@lists.linaro.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, rruigrok@codeaurora.org, harba@codeaurora.org, cov@codeaurora.org, timur@codeaurora.org, graeme.gregory@linaro.org, al.stone@linaro.org, jcm@redhat.com, wei@redhat.com, arnd@arndb.de, catalin.marinas@arm.com, will.deacon@arm.com, Suravee.Suthikulpanit@amd.com, leo.duran@amd.com, wim@iguana.be, linux@roeck-us.net, linux-watchdog@vger.kernel.org, tn@semihalf.com, christoffer.dall@linaro.org, julien.grall@arm.com, Fu Wei Subject: [PATCH v20 16/17] clocksource/drivers/arm_arch_timer: Add GTDT support for memory-mapped timer Date: Wed, 18 Jan 2017 21:25:40 +0800 Message-Id: <20170118132541.8989-17-fu.wei@linaro.org> In-Reply-To: <20170118132541.8989-1-fu.wei@linaro.org> References: <20170118132541.8989-1-fu.wei@linaro.org> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Wed, 18 Jan 2017 13:29:00 +0000 (UTC) Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.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 | 35 ++++++++++++++++++++++++++++++++--- 1 file changed, 32 insertions(+), 3 deletions(-) diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 79dc004..7ca2da7 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -1077,10 +1077,36 @@ 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(int platform_timer_count) +{ + struct arch_timer_mem *timer_mem; + int timer_count, i, ret; + + timer_mem = kcalloc(platform_timer_count, sizeof(*timer_mem), + GFP_KERNEL); + if (!timer_mem) + return -ENOMEM; + + ret = acpi_arch_timer_mem_init(timer_mem, &timer_count); + if (ret || !timer_count) + goto error; + + for (i = 0; i < timer_count; i++) { + ret = arch_timer_mem_init(timer_mem); + if (!ret) + break; + timer_mem++; + } + +error: + 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; + int ret, platform_timer_count; if (arch_timers_present & ARCH_TIMER_TYPE_CP15) { pr_warn("already initialized, skipping\n"); @@ -1089,7 +1115,7 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table) arch_timers_present |= ARCH_TIMER_TYPE_CP15; - ret = acpi_gtdt_init(table, NULL); + ret = acpi_gtdt_init(table, &platform_timer_count); if (ret) { pr_err("Failed to init GTDT table.\n"); return ret; @@ -1122,6 +1148,9 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table) if (ret) return ret; + if (arch_timer_mem_acpi_init(platform_timer_count)) + pr_err("Failed to initialize memory-mapped timer.\n"); + return arch_timer_common_init(); } CLOCKSOURCE_ACPI_DECLARE(arch_timer, ACPI_SIG_GTDT, arch_timer_acpi_init);