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 62130C64EC4 for ; Fri, 10 Mar 2023 14:45:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232995AbjCJOpb (ORCPT ); Fri, 10 Mar 2023 09:45:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34830 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232957AbjCJOpM (ORCPT ); Fri, 10 Mar 2023 09:45:12 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 44F16A335C for ; Fri, 10 Mar 2023 06:44:55 -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 ams.source.kernel.org (Postfix) with ESMTPS id E64E2B822DD for ; Fri, 10 Mar 2023 14:44:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3824BC4339B; Fri, 10 Mar 2023 14:44:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678459492; bh=2rKy9rRlj3wAXhskwM0joc89xA3kNXMdg/pYNOYLE5M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lJ+wLBiV6mNlMrPYJgDMkXDxU6jX6GfEwnVm0kb6KjaatUyyTusmv+dpZGvRt1VKy 4TNNNU0Ee5tTNI1v8TgzSF0B72/gr5uM2Z0r86tHTjwORcL4QtS461YS6haNxf9jz9 E0n9UpYADTpa0fjJU/N2da8RhFuEhhnACfDng8ls= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chen-Yu Tsai , AngeloGioacchino Del Regno , Matthias Brugger , Sasha Levin Subject: [PATCH 5.10 008/529] arm64: dts: mediatek: mt8183: Fix systimer 13 MHz clock description Date: Fri, 10 Mar 2023 14:32:31 +0100 Message-Id: <20230310133805.405255291@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230310133804.978589368@linuxfoundation.org> References: <20230310133804.978589368@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: Chen-Yu Tsai [ Upstream commit ce8a06b5bac75ccce99c0cf91b96b767d64f28a7 ] The systimer block derives its 13 MHz clock by dividing the main 26 MHz oscillator clock by 2 internally, not through the TOPCKGEN clock controller. On the MT8183 this divider is set either by power-on-reset or by the bootloader. The bootloader may then make the divider unconfigurable to, but can be read out by, the operating system. Making the systimer block take the 26 MHz clock directly requires changing the implementations. As an ABI compatible fix, change the input clock of the systimer block a fixed factor divide-by-2 clock that takes the 26 MHz oscillator as its input. Fixes: 5bc8e2875ffb ("arm64: dts: mt8183: add systimer0 device node") Signed-off-by: Chen-Yu Tsai Reviewed-by: AngeloGioacchino Del Regno Link: https://lore.kernel.org/r/20221201084229.3464449-2-wenst@chromium.org Signed-off-by: Matthias Brugger Signed-off-by: Sasha Levin --- arch/arm64/boot/dts/mediatek/mt8183.dtsi | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi index 08a914d3a6435..31bc8bae8cff8 100644 --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi @@ -205,6 +205,15 @@ psci { method = "smc"; }; + clk13m: fixed-factor-clock-13m { + compatible = "fixed-factor-clock"; + #clock-cells = <0>; + clocks = <&clk26m>; + clock-div = <2>; + clock-mult = <1>; + clock-output-names = "clk13m"; + }; + clk26m: oscillator { compatible = "fixed-clock"; #clock-cells = <0>; @@ -355,8 +364,7 @@ systimer: timer@10017000 { "mediatek,mt6765-timer"; reg = <0 0x10017000 0 0x1000>; interrupts = ; - clocks = <&topckgen CLK_TOP_CLK13M>; - clock-names = "clk13m"; + clocks = <&clk13m>; }; gce: mailbox@10238000 { -- 2.39.2