From nobody Mon Sep 8 09:51:59 2025 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 82282EB64DD for ; Fri, 21 Jul 2023 03:52:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229785AbjGUDwq (ORCPT ); Thu, 20 Jul 2023 23:52:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35188 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229815AbjGUDwo (ORCPT ); Thu, 20 Jul 2023 23:52:44 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5296A2D56 for ; Thu, 20 Jul 2023 20:52:11 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qMhBL-0005xp-AC; Fri, 21 Jul 2023 05:51:55 +0200 Received: from [2a0a:edc0:0:1101:1d::39] (helo=dude03.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1qMhBJ-000yi9-KE; Fri, 21 Jul 2023 05:51:53 +0200 Received: from localhost ([::1] helo=dude03.red.stw.pengutronix.de) by dude03.red.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1qMhBI-002zpJ-UD; Fri, 21 Jul 2023 05:51:53 +0200 From: Johannes Zink Date: Fri, 21 Jul 2023 05:51:48 +0200 Subject: [PATCH v2] arm64: dts: imx8mp: use correct clock for eqos timestamping counter MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20230719-imx8mp_enet_qos_use_125mhz_clock-v2-1-eed15d74bfd1@pengutronix.de> X-B4-Tracking: v=1; b=H4sIANMAumQC/5WOSw6CMBRFt0I6toZXlY8j92FIU8qTvggttkBQw t6t7MDhOYN77soCesLArsnKPM4UyNkI4pAwbZRtkVMTmYlUnNIcSk79UvSDRIujfLkgp4ASxKU 3H6k7p58c9DkD0GVe1orFmVoF5LVXVps4ZKeui3Lw+KBl796ryIbC6Px7vzHDz/5RnIEDzwuhS 6UzBAG3AW07jd5ZWo4Nsmrbti+Rpowu6gAAAA== To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team Cc: patchwork-jzi@pengutronix.de, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Johannes Zink X-Mailer: b4 0.12.2 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: j.zink@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The i.MX8MP Reference Manual rev 1 06/2021, section 11.7.2.5 "Timestamp Support" indicates the PTP timestamp clock expects a typical frequency of 125MHz. As this also improves the precision of the measured timestamps: assign appropriate 125MHz Clock parent. As no one except the timestamping counter uses this clock, there are no side-effects of this change in other peripherals. Signed-off-by: Johannes Zink Reviewed-by: Fabio Estevam --- Changes in v2: - not only set assigned-clock-parents but alkso assigned-clock-rates for IMX8MP_CLK_ENET_QOS_TIMER to 125MHz (found by Fabio's review - thanks!) - Link to v1: https://lore.kernel.org/r/20230719-imx8mp_enet_qos_use_125mhz= _clock-v1-1-782c9ac6e121@pengutronix.de --- Changes: v1 -> v2: Worked in Fabio's Feedback - Thank you for your review! - not only set assigned clock parent to 125MHz but also set the assigned clock rate of IMX8MP_CLK_ENET_QOS_TIMER to 125MHz --- arch/arm64/boot/dts/freescale/imx8mp.dtsi | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dt= s/freescale/imx8mp.dtsi index 6f2f50e1639c..84ecf07affb3 100644 --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi @@ -1334,9 +1334,9 @@ eqos: ethernet@30bf0000 { <&clk IMX8MP_CLK_ENET_QOS_TIMER>, <&clk IMX8MP_CLK_ENET_QOS>; assigned-clock-parents =3D <&clk IMX8MP_SYS_PLL1_266M>, - <&clk IMX8MP_SYS_PLL2_100M>, + <&clk IMX8MP_SYS_PLL2_125M>, <&clk IMX8MP_SYS_PLL2_125M>; - assigned-clock-rates =3D <0>, <100000000>, <125000000>; + assigned-clock-rates =3D <0>, <125000000>, <125000000>; nvmem-cells =3D <ð_mac2>; nvmem-cell-names =3D "mac-address"; intf_mode =3D <&gpr 0x4>; --- base-commit: ba345b77fae7054d0cbd033283c47033e45db6d8 change-id: 20230719-imx8mp_enet_qos_use_125mhz_clock-1c4611c979ba Best regards, --=20 Johannes Zink