From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7EAAC28ED for ; Mon, 12 Dec 2022 13:35:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F017C433D2; Mon, 12 Dec 2022 13:35:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1670852146; bh=6Q/ceYq2bcnZr3s3d6tLNoBiaxGV2h9u/VNlpMX+ekw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QCDPkKUZbefkAf1rYSsthGayUr+EN/QqRuGRRVSLfsojJjDZANGldk6PiJHONNNH3 QavYOi70atjYUFDH2Y0hUgPVYOYuMTKiQvqWK/2M+O1Q0IOLxP20oqnBsTlVTV9T7z dS1nYuVJc91JBfguS67Lk93MoYUpLuyTkHtVoJ5Q= 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 6.0 020/157] ARM: dts: rockchip: disable arm_global_timer on rk3066 and rk3188 Date: Mon, 12 Dec 2022 14:16:08 +0100 Message-Id: <20221212130935.296560236@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221212130934.337225088@linuxfoundation.org> References: <20221212130934.337225088@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 b8f34bef0efa..44b54af0bbf9 100644 --- a/arch/arm/boot/dts/rk3188.dtsi +++ b/arch/arm/boot/dts/rk3188.dtsi @@ -607,7 +607,6 @@ &global_timer { interrupts = ; - status = "disabled"; }; &local_timer { diff --git a/arch/arm/boot/dts/rk3xxx.dtsi b/arch/arm/boot/dts/rk3xxx.dtsi index 616a828e0c6e..17e89d30de78 100644 --- a/arch/arm/boot/dts/rk3xxx.dtsi +++ b/arch/arm/boot/dts/rk3xxx.dtsi @@ -76,6 +76,13 @@ 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