From patchwork Wed Feb 2 21:25:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Drew Fustini X-Patchwork-Id: 539511 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 E6D2CC433F5 for ; Wed, 2 Feb 2022 21:27:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232900AbiBBV1M (ORCPT ); Wed, 2 Feb 2022 16:27:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53816 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229666AbiBBV1L (ORCPT ); Wed, 2 Feb 2022 16:27:11 -0500 Received: from mail-pj1-x102f.google.com (mail-pj1-x102f.google.com [IPv6:2607:f8b0:4864:20::102f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 759EAC06173B for ; Wed, 2 Feb 2022 13:27:11 -0800 (PST) Received: by mail-pj1-x102f.google.com with SMTP id cq9-20020a17090af98900b001b8262fe2d5so2747721pjb.0 for ; Wed, 02 Feb 2022 13:27:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=+MX3D9q8d3LzKE4FBcDvQ2a3FDyu2HVNWGmSJadrBn8=; b=4sTFPyi53OOLG+HQ5SejHODLgQ+qUrtD9GZxSJ7ShYrvsFG4QhoWkdAIPReC6G1p0J UHYQCyxOIYt36ZxoKfizbwTzGNEIeaHQKrSchgJZBHkcwOWbI5BgNN2wBStCbBwvH7sB 1CmW1G7IXVOHIMTv2TMgULJaHzW0qCFO1gWe26y5STKIUcfsmC5xB9y06BD3zT5/9yCF ywzNX1MaXh13XVPrU6Umz52Ygzw4/iaJ9B1qXyS85YfwrDBUmoKjLRBnN5q3/apX8yaQ HMfoHYU5Okv216E6Gsglt60xd9ICAkbh7CMRQxNvBHBke6RUZUOk9cN2UjzQdYhKhNJC 4uzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=+MX3D9q8d3LzKE4FBcDvQ2a3FDyu2HVNWGmSJadrBn8=; b=NRWAjRN0+003G3i1ouSE1O6NiODBgZ6ar9P3rRJjhGJ75YW2YZzYiAZE5YZkhzyuT1 N4Onf0bQU6Q1Snzb45zXB3eRnep3LT2VuRJr2bFcZHWE00VgLc1K4DyqRSxADwfqPRII Dy0bC6SArzNj+L8a2Y7VT9dzZ5DtzhagoIQGE3dQ6GU9xWxPN7h76Pj0T/xt8l6kWm6t HB2OLqXqTB1uKF2Wq05y5ehPLN4QN8hr/D33Q6UEK6f/P15y5ZtNceBd8bFyS1drdx56 fuKB3gJwxRhpnGYgiQ8SQBH2TBPNIveKpi9Kxw43iqUX7rjnmb/P2XFPAtTSef7qN7tX uGLQ== X-Gm-Message-State: AOAM533uTml96evDvcTivOFjvJbcX7fBivrQkAzALUroj2Om6tjBYoGK jZikcPm0+OOnLWaqPGxtaV3kFQ== X-Google-Smtp-Source: ABdhPJzKzue1OErPgU/Ol0OyFasfeCXXO8paAjP9TLPGwHbmhBypSxEY8Nsey15YsuIy5WiTLfvPYA== X-Received: by 2002:a17:902:ea0f:: with SMTP id s15mr31734177plg.118.1643837230684; Wed, 02 Feb 2022 13:27:10 -0800 (PST) Received: from x1.hsd1.or.comcast.net ([2601:1c2:1001:7090:9646:73e6:2457:2f0f]) by smtp.gmail.com with ESMTPSA id mi11sm7579087pjb.37.2022.02.02.13.27.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Feb 2022 13:27:10 -0800 (PST) From: Drew Fustini To: Tony Lindgren , Daniel Lezcano , Keerthy , linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Tero Kristo , khilman@baylibre.com, s-anna@ti.com Cc: Drew Fustini Subject: [PATCH] clocksource/drivers/timer-ti-dm: fix regression from errata i940 fix Date: Wed, 2 Feb 2022 13:25:55 -0800 Message-Id: <20220202212554.1316032-1-dfustini@baylibre.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org The existing fix for errata i940 causes a conflict for IPU2 which is using timer 3 and 4. From arch/arm/boot/dts/dra7-ipu-dsp-common.dtsi: &ipu2 { mboxes = <&mailbox6 &mbox_ipu2_ipc3x>; ti,timers = <&timer3>; ti,watchdog-timers = <&timer4>, <&timer9>; }; I discovered the timer conflict from when booting mainline on a BeagleBoard X15 (AM5728): remoteproc remoteproc1: 55020000.ipu is available remoteproc remoteproc1: powering up 55020000.ipu remoteproc remoteproc1: Booting fw image dra7-ipu2-fw.xem4 omap-rproc 55020000.ipu: could not get timer platform device omap-rproc 55020000.ipu: omap_rproc_enable_timers failed: -19 remoteproc remoteproc1: can't start rproc 55020000.ipu: -19 I modified the errata fix to use timer 15 and 16 instead which resolves the timer conflict. Fixes: 25de4ce5ed02 ("clocksource/drivers/timer-ti-dm: Handle dra7 timer wrap errata i940") Link: https://lore.kernel.org/linux-omap/YfWsG0p6to3IJuvE@x1/ Signed-off-by: Drew Fustini Reviewed-by: Tony Lindgren --- Note: I am keeping the device tree and driver change together in one patch as that is how the original errata fix commit was structured. arch/arm/boot/dts/dra7-l4.dtsi | 5 ++--- arch/arm/boot/dts/dra7.dtsi | 8 ++++---- drivers/clocksource/timer-ti-dm-systimer.c | 4 ++-- 3 files changed, 8 insertions(+), 9 deletions(-) diff --git a/arch/arm/boot/dts/dra7-l4.dtsi b/arch/arm/boot/dts/dra7-l4.dtsi index 956a26d52a4c..0a11bacffc1f 100644 --- a/arch/arm/boot/dts/dra7-l4.dtsi +++ b/arch/arm/boot/dts/dra7-l4.dtsi @@ -3482,8 +3482,7 @@ timer14: timer@0 { ti,timer-pwm; }; }; - - target-module@2c000 { /* 0x4882c000, ap 17 02.0 */ + timer15_target: target-module@2c000 { /* 0x4882c000, ap 17 02.0 */ compatible = "ti,sysc-omap4-timer", "ti,sysc"; reg = <0x2c000 0x4>, <0x2c010 0x4>; @@ -3511,7 +3510,7 @@ timer15: timer@0 { }; }; - target-module@2e000 { /* 0x4882e000, ap 19 14.0 */ + timer16_target: target-module@2e000 { /* 0x4882e000, ap 19 14.0 */ compatible = "ti,sysc-omap4-timer", "ti,sysc"; reg = <0x2e000 0x4>, <0x2e010 0x4>; diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi index 6b485cbed8d5..8f7ffe2f66e9 100644 --- a/arch/arm/boot/dts/dra7.dtsi +++ b/arch/arm/boot/dts/dra7.dtsi @@ -1339,20 +1339,20 @@ timer@0 { }; /* Local timers, see ARM architected timer wrap erratum i940 */ -&timer3_target { +&timer15_target { ti,no-reset-on-init; ti,no-idle; timer@0 { - assigned-clocks = <&l4per_clkctrl DRA7_L4PER_TIMER3_CLKCTRL 24>; + assigned-clocks = <&l4per3_clkctrl DRA7_L4PER3_TIMER15_CLKCTRL 24>; assigned-clock-parents = <&timer_sys_clk_div>; }; }; -&timer4_target { +&timer16_target { ti,no-reset-on-init; ti,no-idle; timer@0 { - assigned-clocks = <&l4per_clkctrl DRA7_L4PER_TIMER4_CLKCTRL 24>; + assigned-clocks = <&l4per3_clkctrl DRA7_L4PER3_TIMER16_CLKCTRL 24>; assigned-clock-parents = <&timer_sys_clk_div>; }; }; diff --git a/drivers/clocksource/timer-ti-dm-systimer.c b/drivers/clocksource/timer-ti-dm-systimer.c index b6f97960d8ee..c706d63e9f5c 100644 --- a/drivers/clocksource/timer-ti-dm-systimer.c +++ b/drivers/clocksource/timer-ti-dm-systimer.c @@ -695,9 +695,9 @@ static int __init dmtimer_percpu_quirk_init(struct device_node *np, u32 pa) return 0; } - if (pa == 0x48034000) /* dra7 dmtimer3 */ + if (pa == 0x4882C000) /* dra7 dmtimer15 */ return dmtimer_percpu_timer_init(np, 0); - else if (pa == 0x48036000) /* dra7 dmtimer4 */ + else if (pa == 0x4882E000) /* dra7 dmtimer16 */ return dmtimer_percpu_timer_init(np, 1); return 0;