From patchwork Wed May 13 18:46:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Zhou Yanjie X-Patchwork-Id: 11547065 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 98082139A for ; Wed, 13 May 2020 18:47:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 92398205ED for ; Wed, 13 May 2020 18:47:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390298AbgEMSrD (ORCPT ); Wed, 13 May 2020 14:47:03 -0400 Received: from out28-218.mail.aliyun.com ([115.124.28.218]:52659 "EHLO out28-218.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390202AbgEMSrC (ORCPT ); Wed, 13 May 2020 14:47:02 -0400 X-Alimail-AntiSpam: AC=CONTINUE;BC=0.08427303|-1;CH=green;DM=|CONTINUE|false|;DS=CONTINUE|ham_social|0.016342-0.00062254-0.983035;FP=0|0|0|0|0|-1|-1|-1;HT=e02c03295;MF=zhouyanjie@wanyeetech.com;NM=1;PH=DS;RN=19;RT=19;SR=0;TI=SMTPD_---.HY8LAU0_1589395602; Received: from localhost.localdomain(mailfrom:zhouyanjie@wanyeetech.com fp:SMTPD_---.HY8LAU0_1589395602) by smtp.aliyun-inc.com(10.147.44.118); Thu, 14 May 2020 02:46:57 +0800 From: =?utf-8?b?5ZGo55Cw5p2wIChaaG91IFlhbmppZSk=?= To: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, tsbogend@alpha.franken.de, paulburton@kernel.org, jiaxun.yang@flygoat.com, chenhc@lemote.com, tglx@linutronix.de, robh+dt@kernel.org, daniel.lezcano@linaro.org, keescook@chromium.org, paul@crapouillou.net, krzk@kernel.org, hns@goldelico.com, ebiederm@xmission.com, dongsheng.qiu@ingenic.com, yanfei.li@ingenic.com, sernia.zhou@foxmail.com, zhenwenjin@gmail.com Subject: [PATCH v7 2/6] MIPS: CI20: Modify DTS to support high resolution timer for SMP. Date: Thu, 14 May 2020 02:46:13 +0800 Message-Id: <1589395578-87441-4-git-send-email-zhouyanjie@wanyeetech.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1589395578-87441-1-git-send-email-zhouyanjie@wanyeetech.com> References: <1589395578-87441-1-git-send-email-zhouyanjie@wanyeetech.com> MIME-Version: 1.0 Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Modify DTS, change tcu channel from 2 to 3, channel #0 and #1 for per core local timer, #2 for clocksource. Tested-by: H. Nikolaus Schaller Tested-by: Paul Boddie Signed-off-by: 周琰杰 (Zhou Yanjie) --- Notes: v1->v2: No change. v2->v3: No change. v3->v4: Rebase on top of kernel 5.6-rc1. v4->v5: Move [5/6] in v4 to this patch, to ensure that we can git-bisect without ending up with a broken kernel. v5->v6: No change. v6->v7: Remove unnecessary "ingenic,pwm-channels-mask". arch/mips/boot/dts/ingenic/ci20.dts | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/arch/mips/boot/dts/ingenic/ci20.dts b/arch/mips/boot/dts/ingenic/ci20.dts index db0ca25..06e3186 100644 --- a/arch/mips/boot/dts/ingenic/ci20.dts +++ b/arch/mips/boot/dts/ingenic/ci20.dts @@ -486,7 +486,12 @@ }; &tcu { - /* 3 MHz for the system timer and clocksource */ - assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER1>; - assigned-clock-rates = <3000000>, <3000000>; + /* + * 750 kHz for the system timers and clocksource, + * use channel #0 and #1 for the per cpu system timers, + * and use channel #2 for the clocksource. + */ + assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER1>, + <&tcu TCU_CLK_TIMER2>; + assigned-clock-rates = <750000>, <750000>, <750000>; };