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[81.204.249.205]) by smtp.gmail.com with ESMTPSA id q8-20020a5d5748000000b0023677081f3asm4835322wrw.42.2022.10.30.11.36.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 30 Oct 2022 11:36:02 -0700 (PDT) Message-ID: <88e93a81-ef9f-adcc-db83-f8b5ba615c47@gmail.com> Date: Sun, 30 Oct 2022 19:36:01 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.3.0 From: Johan Jonker Subject: [PATCH v1 1/2] arm: rockchip: Kconfig: remove select ARM_GLOBAL_TIMER To: heiko@sntech.de Cc: linux@armlinux.org.uk, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org Content-Language: en-US X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_ENVFROM_END_DIGIT, FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1748138732133854052?= X-GMAIL-MSGID: =?utf-8?q?1748138732133854052?= The clocksource 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 clocksource. Let's disable the arm_global_timer in order to have the ROCKCHIP_TIMER (rk3188) or DW_APB_TIMER (rk3066a) selected by default. Signed-off-by: Johan Jonker --- ARM: dts: rockchip: disable arm-global-timer for rk3188 https://lore.kernel.org/linux-rockchip/1492374441-23336-26-git-send-email-daniel.lezcano@linaro.org/ clocksource: arm_global_timer: implement rate compensation whenever source clock changes https://lore.kernel.org/all/20210406130045.15491-2-andrea.merello@gmail.com/ --- arch/arm/mach-rockchip/Kconfig | 2 -- 1 file changed, 2 deletions(-) -- 2.20.1 diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig index b7855cc66..0432a4430 100644 --- a/arch/arm/mach-rockchip/Kconfig +++ b/arch/arm/mach-rockchip/Kconfig @@ -15,8 +15,6 @@ config ARCH_ROCKCHIP select DW_APB_TIMER_OF select REGULATOR if PM select ROCKCHIP_TIMER - select ARM_GLOBAL_TIMER - select CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK select ZONE_DMA if ARM_LPAE select PM help From patchwork Sun Oct 30 18:37:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Jonker X-Patchwork-Id: 13037 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:6687:0:0:0:0:0 with SMTP id l7csp1914574wru; Sun, 30 Oct 2022 11:37:46 -0700 (PDT) X-Google-Smtp-Source: AMsMyM7+zisF8OnJCZZEUxknMgHTl44j8C3yIJU7ulw0Rl6cHKJ3eIjK8yOHTkDC14FU0h7YI/o1 X-Received: by 2002:a65:6148:0:b0:458:88cd:f46 with SMTP id o8-20020a656148000000b0045888cd0f46mr9047235pgv.303.1667155066247; Sun, 30 Oct 2022 11:37:46 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1667155066; cv=none; d=google.com; s=arc-20160816; b=L9mGtDxXP4qgrUc/K9XGXNeZrFfFqLRlMmC21afqDgc3Pa36zMsKF2KArH6yIw9N5Y /ky4xlhy5cLMMALEC56HhmJRa+PS6uVUhdz8sHNKK4ag2h9AxDaOHNwLc9kIwTfSDplr o9KMvhm0yMoRLiWaoW8py8I8mh+GMAH8r2DAQ9baOHpdzdOhF21TiAxB9OntX/J+so23 cAmFUPHBGIvG8Gvxm3sEY5m5Bdc0Kw4wX1WreDBITgTneRw+OBiVliNaBVM9mrTGaQOb eAjUtAXQgvKFDEEW3Fe/L6N7ZvQqmWZqsI0KXSZ9Deebe9bvAFwmmFbbhSaza9gzqUEu AsNQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:in-reply-to :content-language:references:cc:to:subject:from:user-agent :mime-version:date:message-id:dkim-signature; bh=J+5BMktAWdfToMJ1hbGNlYZD5Qlu0JfVkC/Za08BZ7c=; b=rG3U4X4Oqe1cqVk6KRuRbmRQFJ1udAJGXBNP8iSzEx/QlLJ7+UNEeaSdT/mbf1MZBr sj0IuTWf+K2+1qJiqZyjfdHiWCZRhZFsk/lszUXeaQzZjQqBTzKyuoBPB097hFh3BKtm o6RbTgN+ThKJZdennVTHvuZyLw7PrmnHcHxNjsGBSRxLedksghEecCjXqslGUNkbgzXh GHbi9c8lmcvahNl/8A2GktHaE2gIIEK8E7/38LcnZk7IX1cbrB102p5dvn+2KzyeL/+7 UH75OaWfSKbPGCiIpmxkgx7DoG9XIGRxL40DzIo7TKAzsZbw28WPNtdXF9Iou6qiycPQ VuYg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=lZucQFwM; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from out1.vger.email (out1.vger.email. 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[81.204.249.205]) by smtp.gmail.com with ESMTPSA id bx10-20020a5d5b0a000000b0022e47b57735sm4922159wrb.97.2022.10.30.11.37.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 30 Oct 2022 11:37:02 -0700 (PDT) Message-ID: <903ba85a-75fc-ff9e-e0ba-4a1e6161abc1@gmail.com> Date: Sun, 30 Oct 2022 19:37:01 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.3.0 From: Johan Jonker Subject: [PATCH v1 2/2] ARM: dts: rockchip: rk3066a: disable arm_global_timer To: heiko@sntech.de Cc: linux@armlinux.org.uk, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org References: <88e93a81-ef9f-adcc-db83-f8b5ba615c47@gmail.com> Content-Language: en-US In-Reply-To: <88e93a81-ef9f-adcc-db83-f8b5ba615c47@gmail.com> X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_ENVFROM_END_DIGIT, FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1748138790530282504?= X-GMAIL-MSGID: =?utf-8?q?1748138790530282504?= The clocksource 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 clocksource. Let's disable the arm_global_timer in order to have the DW_APB_TIMER (rk3066a) selected by default. Signed-off-by: Johan Jonker --- ARM: dts: rockchip: disable arm-global-timer for rk3188 https://lore.kernel.org/linux-rockchip/1492374441-23336-26-git-send-email-daniel.lezcano@linaro.org/ clocksource: arm_global_timer: implement rate compensation whenever source clock changes https://lore.kernel.org/all/20210406130045.15491-2-andrea.merello@gmail.com/ --- arch/arm/boot/dts/rk3066a.dtsi | 4 ++++ 1 file changed, 4 insertions(+) -- 2.20.1 diff --git a/arch/arm/boot/dts/rk3066a.dtsi b/arch/arm/boot/dts/rk3066a.dtsi index de9915d94..cf8045625 100644 --- a/arch/arm/boot/dts/rk3066a.dtsi +++ b/arch/arm/boot/dts/rk3066a.dtsi @@ -653,6 +653,10 @@ }; }; +&global_timer { + status = "disabled"; +}; + &gpu { compatible = "rockchip,rk3066-mali", "arm,mali-400"; interrupts = ,