From patchwork Wed Dec 12 22:12:26 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Cercueil X-Patchwork-Id: 10727335 X-Patchwork-Delegate: paulburton@kernel.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5D9E814E2 for ; Wed, 12 Dec 2018 22:22:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 505ED29B11 for ; Wed, 12 Dec 2018 22:22:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 43B232A920; Wed, 12 Dec 2018 22:22:04 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham 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 E98BD29B11 for ; Wed, 12 Dec 2018 22:22:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728447AbeLLWVl (ORCPT ); Wed, 12 Dec 2018 17:21:41 -0500 Received: from outils.crapouillou.net ([89.234.176.41]:44942 "EHLO crapouillou.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728393AbeLLWVl (ORCPT ); Wed, 12 Dec 2018 17:21:41 -0500 From: Paul Cercueil To: Thierry Reding , Rob Herring , Mark Rutland , Daniel Lezcano , Thomas Gleixner , Ralf Baechle , Paul Burton , James Hogan , Jonathan Corbet Cc: Mathieu Malaterre , Ezequiel Garcia , PrasannaKumar Muralidharan , linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-mips@vger.kernel.org, linux-doc@vger.kernel.org, linux-clk@vger.kernel.org, od@zcrc.me, Paul Cercueil Subject: [PATCH v8 21/26] MIPS: CI20: Reduce system timer and clocksource to 3 MHz Date: Wed, 12 Dec 2018 23:12:26 +0100 Message-Id: <20181212221226.19194-1-paul@crapouillou.net> In-Reply-To: <20181212220922.18759-1-paul@crapouillou.net> References: <20181212220922.18759-1-paul@crapouillou.net> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1544652755; bh=oMxZ6AwauCwPGsEAXokGRL6V/FQaYp9ZahPHDS7nrKo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=t8KzJrHq+2ZR2G2DOX5KTMZzcjnC+bKffuxVOzZXPlMhB4Hja/M4bX1EjxxgMWdVZRb5Ms/sQ8XfbFMLFvs1CmiU4GjREzHLZDSYR7aWWEEayMewk55SD7p8vCsveT5U3VGwKKSHPBoPa7u786BmBlOazCoZFq02VdCDZh5hInM= Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The default clock (48 MHz) is too fast for the system timer, which fails to report time accurately. Signed-off-by: Paul Cercueil --- Notes: v5: New patch v6: Set also the rate for the clocksource channel's clock v7: No change v8: No change arch/mips/boot/dts/ingenic/ci20.dts | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/mips/boot/dts/ingenic/ci20.dts b/arch/mips/boot/dts/ingenic/ci20.dts index 50cff3cbcc6d..f64d32443097 100644 --- a/arch/mips/boot/dts/ingenic/ci20.dts +++ b/arch/mips/boot/dts/ingenic/ci20.dts @@ -238,3 +238,9 @@ bias-disable; }; }; + +&tcu { + /* 3 MHz for the system timer and clocksource */ + assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER1>; + assigned-clock-rates = <3000000>, <3000000>; +};