From patchwork Wed Feb 19 23:14:44 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Soren Brinkmann X-Patchwork-Id: 3683471 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 179289F1EE for ; Wed, 19 Feb 2014 23:18:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 32C542016C for ; Wed, 19 Feb 2014 23:18:20 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EA17820122 for ; Wed, 19 Feb 2014 23:18:18 +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 1WGGNi-0003Pa-A8; Wed, 19 Feb 2014 23:16:49 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WGGNC-0003fc-VG; Wed, 19 Feb 2014 23:16:14 +0000 Received: from mail-qc0-x232.google.com ([2607:f8b0:400d:c01::232]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WGGMV-0003Yh-Ah for linux-arm-kernel@lists.infradead.org; Wed, 19 Feb 2014 23:15:33 +0000 Received: by mail-qc0-f178.google.com with SMTP id m20so1951597qcx.37 for ; Wed, 19 Feb 2014 15:15:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=9gFD6jxqMDv9IAA8wmvqPhD5Fbvue40WKKNMeFPKiEk=; b=REkomXzZKNmXnFSDnw41ojTA/f8v80WUnGEdkgK405xBRg9TvGEzpgQ9txkctfw3iJ mZD2lgvFAPOqu8Ri3Ng68LIxc3v5h5hcCIuvUOakBU14KWofdN/xAxy02aiXvCS9ZAQC oR+/+XuS5b4jpw+n5MH1ytUElSMnXzAAnXX2vSyVLrkpqBvyGodBtp7TAUa6Ax1HMykF //hs8mAzSDPpOdc+FntWrh7TE7KrTE+AbKQLj+IssNQAmjSbElAZ26k6w2kzOWhuADEQ IuKB9cl/24CkaZ4xPSZAzS+n9tK4a4pKsovBgDdoquoNmShnZ3LmOoszLt3yhzN59t4N Y5tA== X-Received: by 10.224.173.1 with SMTP id n1mr54118349qaz.48.1392851710283; Wed, 19 Feb 2014 15:15:10 -0800 (PST) Received: from localhost ([149.199.62.254]) by mx.google.com with ESMTPSA id 67sm3917270qgr.15.2014.02.19.15.15.09 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Wed, 19 Feb 2014 15:15:09 -0800 (PST) From: Soren Brinkmann To: Thomas Gleixner , Daniel Lezcano , Michal Simek Subject: [PATCH v4 4/4] arm: zynq: Add support for cpufreq Date: Wed, 19 Feb 2014 15:14:44 -0800 Message-Id: <1392851684-29950-5-git-send-email-soren.brinkmann@xilinx.com> X-Mailer: git-send-email 1.9.0.1.g4196000 In-Reply-To: <1392851684-29950-1-git-send-email-soren.brinkmann@xilinx.com> References: <1392851684-29950-1-git-send-email-soren.brinkmann@xilinx.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140219_181531_468688_06341989 X-CRM114-Status: GOOD ( 14.12 ) X-Spam-Score: 1.0 (+) Cc: Mark Rutland , devicetree@vger.kernel.org, Russell King , Pawel Moll , Ian Campbell , linux-kernel@vger.kernel.org, Rob Herring , linux-arm-kernel@lists.infradead.org, Kumar Gala , =?UTF-8?q?S=C3=B6ren=20Brinkmann?= 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: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,DKIM_SIGNED, KHOP_BIG_TO_CC,RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=no 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 The generic cpufreq-cpu0 driver can scale the CPU frequency on Zynq SOCs. Add the required platform device to the BSP and appropriate OPPs to the dts. Cc: Rob Herring Cc: Pawel Moll Cc: Mark Rutland Cc: Ian Campbell Cc: Kumar Gala Cc: Russell King Cc: devicetree@vger.kernel.org Signed-off-by: Soren Brinkmann --- v4: - no change v3: - change lowest frequency to 222223 (F_max / 3) --- arch/arm/boot/dts/zynq-7000.dtsi | 6 ++++++ arch/arm/mach-zynq/Kconfig | 2 ++ arch/arm/mach-zynq/common.c | 3 +++ 3 files changed, 11 insertions(+) diff --git a/arch/arm/boot/dts/zynq-7000.dtsi b/arch/arm/boot/dts/zynq-7000.dtsi index 8b67b19392ec..789d0bacc110 100644 --- a/arch/arm/boot/dts/zynq-7000.dtsi +++ b/arch/arm/boot/dts/zynq-7000.dtsi @@ -24,6 +24,12 @@ device_type = "cpu"; reg = <0>; clocks = <&clkc 3>; + operating-points = < + /* kHz uV */ + 666667 1000000 + 333334 1000000 + 222223 1000000 + >; }; cpu@1 { diff --git a/arch/arm/mach-zynq/Kconfig b/arch/arm/mach-zynq/Kconfig index f84fab14f0b7..f03e75bd0b2b 100644 --- a/arch/arm/mach-zynq/Kconfig +++ b/arch/arm/mach-zynq/Kconfig @@ -2,6 +2,8 @@ config ARCH_ZYNQ bool "Xilinx Zynq ARM Cortex A9 Platform" if ARCH_MULTI_V7 select ARM_AMBA select ARM_GIC + select ARCH_HAS_CPUFREQ + select ARCH_HAS_OPP select COMMON_CLK select CPU_V7 select GENERIC_CLOCKEVENTS diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c index 1db2a5ca9ab8..644468151c04 100644 --- a/arch/arm/mach-zynq/common.c +++ b/arch/arm/mach-zynq/common.c @@ -51,6 +51,8 @@ static struct platform_device zynq_cpuidle_device = { */ static void __init zynq_init_machine(void) { + struct platform_device_info devinfo = { .name = "cpufreq-cpu0", }; + /* * 64KB way size, 8-way associativity, parity disabled */ @@ -59,6 +61,7 @@ static void __init zynq_init_machine(void) of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); platform_device_register(&zynq_cpuidle_device); + platform_device_register_full(&devinfo); } static void __init zynq_timer_init(void)