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 54108C6FD1A for ; Tue, 7 Mar 2023 17:14:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230317AbjCGROh (ORCPT ); Tue, 7 Mar 2023 12:14:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59620 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230495AbjCGROO (ORCPT ); Tue, 7 Mar 2023 12:14:14 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4AF8351FB3 for ; Tue, 7 Mar 2023 09:09:03 -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 96FDA614E7 for ; Tue, 7 Mar 2023 17:09:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 97B12C433EF; Tue, 7 Mar 2023 17:09:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678208942; bh=M0MQry2eoLCSbLJHYRQsI8LrAhcseTEw6sNaxphHjds=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2ESuAWptvpPxRHcis2uRjbmn+3pTmSwQxdkE2litOcUrz+prtji3VLi+ITtb8Va3e s10eMxsdyrKREUoGVU3r5UTLZx6EiWm5cTxgtXFfyRDuqzhTZDIrRSteeyBNfqeNzd pXov9XtxquPCptRgDzCIGN72z+awDy8kTO7RK3rU= 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 6.2 0029/1001] arm64: dts: mediatek: mt8183: Fix systimer 13 MHz clock description Date: Tue, 7 Mar 2023 17:46:41 +0100 Message-Id: <20230307170023.395543617@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230307170022.094103862@linuxfoundation.org> References: <20230307170022.094103862@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 402136bfd5350..268a1f28af8ce 100644 --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi @@ -585,6 +585,15 @@ 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>; @@ -968,8 +977,7 @@ systimer: timer@10017000 { "mediatek,mt6765-timer"; reg = <0 0x10017000 0 0x1000>; interrupts = ; - clocks = <&topckgen CLK_TOP_CLK13M>; - clock-names = "clk13m"; + clocks = <&clk13m>; }; iommu: iommu@10205000 { -- 2.39.2