From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 689BCC4332F for ; Mon, 12 Dec 2022 13:53:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233074AbiLLNx6 (ORCPT ); Mon, 12 Dec 2022 08:53:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52708 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233072AbiLLNxf (ORCPT ); Mon, 12 Dec 2022 08:53:35 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 749EDEB9 for ; Mon, 12 Dec 2022 05:52:43 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 1070661025 for ; Mon, 12 Dec 2022 13:52:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F2E50C433D2; Mon, 12 Dec 2022 13:52:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1670853162; bh=Rc+LxFHimKZdZg+29bvCdwoJZQdLxZfZ4pNsmTsJ708=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a+YeuNDB1sxqSX/pRGc0qgK96VOiYjd0DC10iD5SuLJOb/nmCVh+xTMP0IK1Jx42X WAbryI3xT45pUqGeLD4CBmZxcXCTWUqKZH96klishb8cXYup/Fu1V3FNIZkFcNxEPT eSRra4SlS1MrpxNsdWrym8CWQjVaS7940xCew5wA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johan Jonker , Heiko Stuebner , Sasha Levin Subject: [PATCH 4.14 05/38] ARM: dts: rockchip: disable arm_global_timer on rk3066 and rk3188 Date: Mon, 12 Dec 2022 14:19:06 +0100 Message-Id: <20221212130912.362052394@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221212130912.069170932@linuxfoundation.org> References: <20221212130912.069170932@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Johan Jonker [ Upstream commit da74858a475782a3f16470907814c8cc5950ad68 ] The clock source and the sched_clock provided by the arm_global_timer on Rockchip rk3066a/rk3188 are quite unstable because their rates depend on the CPU frequency. Recent changes to the arm_global_timer driver makes it impossible to use. On the other side, the arm_global_timer has a higher rating than the ROCKCHIP_TIMER, it will be selected by default by the time framework while we want to use the stable Rockchip clock source. Keep the arm_global_timer disabled in order to have the DW_APB_TIMER (rk3066a) or ROCKCHIP_TIMER (rk3188) selected by default. Signed-off-by: Johan Jonker Link: https://lore.kernel.org/r/f275ca8d-fd0a-26e5-b978-b7f3df815e0a@gmail.com Signed-off-by: Heiko Stuebner Signed-off-by: Sasha Levin --- arch/arm/boot/dts/rk3188.dtsi | 1 - arch/arm/boot/dts/rk3xxx.dtsi | 7 +++++++ 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/rk3188.dtsi b/arch/arm/boot/dts/rk3188.dtsi index 74eb1dfa2f6c..3689a23a1bca 100644 --- a/arch/arm/boot/dts/rk3188.dtsi +++ b/arch/arm/boot/dts/rk3188.dtsi @@ -546,7 +546,6 @@ &global_timer { interrupts = ; - status = "disabled"; }; &local_timer { diff --git a/arch/arm/boot/dts/rk3xxx.dtsi b/arch/arm/boot/dts/rk3xxx.dtsi index 4aa6f60d6a22..5f9950704f13 100644 --- a/arch/arm/boot/dts/rk3xxx.dtsi +++ b/arch/arm/boot/dts/rk3xxx.dtsi @@ -134,6 +134,13 @@ reg = <0x1013c200 0x20>; interrupts = ; clocks = <&cru CORE_PERI>; + status = "disabled"; + /* The clock source and the sched_clock provided by the arm_global_timer + * on Rockchip rk3066a/rk3188 are quite unstable because their rates + * depend on the CPU frequency. + * Keep the arm_global_timer disabled in order to have the + * DW_APB_TIMER (rk3066a) or ROCKCHIP_TIMER (rk3188) selected by default. + */ }; local_timer: local-timer@1013c600 { -- 2.35.1