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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2BCF8C433FE for ; Mon, 28 Nov 2022 18:23:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=oWVpPl/wqLjxsZTXSuoKlQ6eWgZxT62Hn8lDYmX4Fqw=; b=A1+fnvC43yEQVP 1YlLnoALkGzZCnAPLGQd/sTww+aT2iVgbzz4fWBE1kECysCZJH0QZ4cFWCGMTfceC2u05TzlTVxS4 mrlNtcbEp7cVCUSL4rIb8ai1nhG+tf/BfU9RCPmbs68i1teNTOFQws+lrRD9XmLnit+Lzw9UYwRtP CG2935vF3gFGyXf2VQZ2V3pb8v+BOckbirBxt758ZZjLx3gqR+lWQQPPI2+kaZORgruiA+ZlkB+et /cX9bEppsxkmgajtFiw3nN34u5GXo7MX02e49i2+Io2Bdmou5Z02uuWTcvJOl7+o2psL3D3n7umUm PQ5T4gOTfFjMv+UiTZVg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ozili-003Wjt-9o; Mon, 28 Nov 2022 18:22:14 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oziA2-003BSf-OA; Mon, 28 Nov 2022 17:43:20 +0000 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 ams.source.kernel.org (Postfix) with ESMTPS id 73025B80E9C; Mon, 28 Nov 2022 17:43:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 37DC3C4347C; Mon, 28 Nov 2022 17:43:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669657396; bh=/oGrLYV9w73kWoPiPHi9riy+YOU1tQ2Cb2dnNSH+7TU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KQ+NELxZ+1Ba3G6qOrkbDSPVAHUgAm3PMDtVsr4qwm+oNv+0eCU09EG0knWR04sT1 S2idUZ1J0JcMUYSXiXyNk2tTcNjo/6lvbF+TW6F0ThrzGMSVHcRTLnaFA/ArIFKSdW xREaAFc1SOZN+51YWVKphAUAlwo798mcDrcZiW+20i9cnzdavFR9NCfba+KQhyps54 qv4EQd2JnTzH1Q7qTpTWmX5J1AwqWmLMVZYhE7A3NwE42y75dU9RojxerkFuo58nRn zQ5kG/tAHpIyNhcsI9MPhdYvaHn13j0JltrbBb9EYGT2FOqdxEnolmOuuKeckk59rA Oc14N89KHtITg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Johan Jonker , Heiko Stuebner , Sasha Levin , robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 5/9] ARM: dts: rockchip: disable arm_global_timer on rk3066 and rk3188 Date: Mon, 28 Nov 2022 12:42:58 -0500 Message-Id: <20221128174303.1443008-5-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221128174303.1443008-1-sashal@kernel.org> References: <20221128174303.1443008-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221128_094318_967731_5D978FBF X-CRM114-Status: GOOD ( 15.52 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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 @@ &emac { &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 @@ global_timer: global-timer@1013c200 { 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel