From patchwork Thu Aug 28 07:05:29 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 4799441 Return-Path: X-Original-To: patchwork-ltsi-dev@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 5D02EC0338 for ; Thu, 28 Aug 2014 08:35:32 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 47E5D200E5 for ; Thu, 28 Aug 2014 08:35:31 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 5E678200E8 for ; Thu, 28 Aug 2014 08:35:30 +0000 (UTC) Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 34973158B; Thu, 28 Aug 2014 07:34:48 +0000 (UTC) X-Original-To: ltsi-dev@lists.linuxfoundation.org Delivered-To: ltsi-dev@mail.linuxfoundation.org Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 7ACBD14CD for ; Thu, 28 Aug 2014 07:34:26 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from kirsty.vergenet.net (kirsty.vergenet.net [202.4.237.240]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 09B812022E for ; Thu, 28 Aug 2014 07:34:26 +0000 (UTC) Received: from ayumi.isobedori.kobe.vergenet.net (p4222-ipbfp1605kobeminato.hyogo.ocn.ne.jp [114.154.95.222]) by kirsty.vergenet.net (Postfix) with ESMTP id C2312267469; Thu, 28 Aug 2014 17:09:15 +1000 (EST) Received: by ayumi.isobedori.kobe.vergenet.net (Postfix, from userid 7100) id 536B2EDE709; Thu, 28 Aug 2014 16:09:14 +0900 (JST) From: Simon Horman To: ltsi-dev@lists.linuxfoundation.org Date: Thu, 28 Aug 2014 16:05:29 +0900 Message-Id: <1409209620-24487-804-git-send-email-horms+renesas@verge.net.au> X-Mailer: git-send-email 2.0.1 In-Reply-To: <1409209620-24487-1-git-send-email-horms+renesas@verge.net.au> References: <1409209620-24487-1-git-send-email-horms+renesas@verge.net.au> X-Spam-Status: No, score=-4.2 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 Cc: Magnus Damm Subject: [LTSI-dev] [PATCH LTSI-3.14 803/894] ARM: shmobile: r8a7791/koelsch dts: Add DVFS parameters into cpu0 node for r8a7791 X-BeenThere: ltsi-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "A list to discuss patches, development, and other things related to the LTSI project" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: ltsi-dev-bounces@lists.linuxfoundation.org Errors-To: ltsi-dev-bounces@lists.linuxfoundation.org X-Virus-Scanned: ClamAV using ClamSMTP From: Gaku Inami Add needed information inside CPU0 for the generic cpufreq-cpu0 driver. - voltage-tolerance = 1% It reflects the tolerance for the CPU voltage defined inside the OPP table. Due to the lack of proper OPP definition, use an arbitrary safe value. - clock-latency = 300 us Approximate worst-case latency to do a full DVFS transition for every OPPs. Due to the lack of HW information, use an arbitrary safe value. Note: The term transition-latency will be more accurate to define this value since the clock transition latency is not the only parameter that will define the overall DVFS transition. - operating-points = < kHz - uV > List of 6 operating points. All of them are using the same voltage since DVS is not supported in R-CAR Gen2. - clocks phandle to the CPU clock source. This clock source is used for all the 2 CortexA15 located inside the same cluster. Signed-off-by: Gaku Inami Acked-by: Magnus Damm Signed-off-by: Simon Horman (cherry picked from commit a57004eca542428a444025847098b2af4e52a81c) Signed-off-by: Simon Horman --- arch/arm/boot/dts/r8a7791-koelsch.dts | 4 ++++ arch/arm/boot/dts/r8a7791.dtsi | 11 +++++++++++ 2 files changed, 15 insertions(+) diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts b/arch/arm/boot/dts/r8a7791-koelsch.dts index 95331d7..b2e6616 100644 --- a/arch/arm/boot/dts/r8a7791-koelsch.dts +++ b/arch/arm/boot/dts/r8a7791-koelsch.dts @@ -429,3 +429,7 @@ regulator-always-on; }; }; + +&cpu0 { + cpu0-supply = <&vdd_dvfs>; +}; diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi index d683982..b639006 100644 --- a/arch/arm/boot/dts/r8a7791.dtsi +++ b/arch/arm/boot/dts/r8a7791.dtsi @@ -45,6 +45,17 @@ compatible = "arm,cortex-a15"; reg = <0>; clock-frequency = <1500000000>; + voltage-tolerance = <1>; /* 1% */ + clocks = <&cpg_clocks R8A7791_CLK_Z>; + clock-latency = <300000>; /* 300 us */ + + /* kHz - uV - OPPs unknown yet */ + operating-points = <1500000 1000000>, + <1312500 1000000>, + <1125000 1000000>, + < 937500 1000000>, + < 750000 1000000>, + < 375000 1000000>; }; cpu1: cpu@1 {