From patchwork Thu May 18 07:44:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 13246262 X-Patchwork-Delegate: cw00.choi@samsung.com 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 7E8A3C77B7A for ; Thu, 18 May 2023 07:44:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230038AbjERHo0 (ORCPT ); Thu, 18 May 2023 03:44:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38766 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229961AbjERHoX (ORCPT ); Thu, 18 May 2023 03:44:23 -0400 Received: from mailout1.w1.samsung.com (mailout1.w1.samsung.com [210.118.77.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 160D72118 for ; Thu, 18 May 2023 00:44:21 -0700 (PDT) Received: from eucas1p1.samsung.com (unknown [182.198.249.206]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20230518074417euoutp018a777626c992323c4e318aeae5584ffa~gLRuYuZzV0715507155euoutp012 for ; Thu, 18 May 2023 07:44:17 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20230518074417euoutp018a777626c992323c4e318aeae5584ffa~gLRuYuZzV0715507155euoutp012 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1684395857; bh=SLVY/n0NOgJuLlPxSfHb8xa2VifNCuXjo5NyzsDrXr4=; h=From:To:Cc:Subject:Date:References:From; b=b8ftHhStxzpUjLR/uNhBzBqUdU402ZwiVzV3/0K71PXTG+i8GN11M8ffpK6L2TYIn AG5FH+MkXxozqq+FjhxZoJYLmIjde3nOkQZz3zquGMHYt5zXZOEUj9O+y52VHI7hLB 1ioqWGMIRx5f30hheoD7RXW4qzr2gDSKMcbfdn0M= Received: from eusmges2new.samsung.com (unknown [203.254.199.244]) by eucas1p1.samsung.com (KnoxPortal) with ESMTP id 20230518074416eucas1p1547736fe516e6e923def1c977e8e6f08~gLRuMSi7a2266922669eucas1p1N; Thu, 18 May 2023 07:44:16 +0000 (GMT) Received: from eucas1p2.samsung.com ( [182.198.249.207]) by eusmges2new.samsung.com (EUCPMTA) with SMTP id CF.6B.35386.057D5646; Thu, 18 May 2023 08:44:16 +0100 (BST) Received: from eusmtrp2.samsung.com (unknown [182.198.249.139]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20230518074416eucas1p1dfd47a3438f2252211cf7daa82e2ac1e~gLRt_mABO2267322673eucas1p1U; Thu, 18 May 2023 07:44:16 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp2.samsung.com (KnoxPortal) with ESMTP id 20230518074416eusmtrp2b9512fd6c1228fb6288d529d651c5822~gLRt87B1x0474504745eusmtrp2Z; Thu, 18 May 2023 07:44:16 +0000 (GMT) X-AuditID: cbfec7f4-cdfff70000028a3a-d2-6465d750f473 Received: from eusmtip2.samsung.com ( [203.254.199.222]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 33.D3.14344.057D5646; Thu, 18 May 2023 08:44:16 +0100 (BST) Received: from AMDC4653.eu.corp.samsungelectronics.net (unknown [106.120.51.32]) by eusmtip2.samsung.com (KnoxPortal) with ESMTPA id 20230518074416eusmtip266789f297403e88dbd442292923aff3e~gLRte-d7M0852408524eusmtip2N; Thu, 18 May 2023 07:44:16 +0000 (GMT) From: Marek Szyprowski To: Chanwoo Choi , linux-pm@vger.kernel.org, linux-samsung-soc@vger.kernel.org Cc: Marek Szyprowski , MyungJoo Ham , Krzysztof Kozlowski , Alim Akhtar Subject: [PATCH] PM / devfreq: exynos: add Exynos PPMU as a soft module dependency Date: Thu, 18 May 2023 09:44:03 +0200 Message-Id: <20230518074403.2894799-1-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFupkleLIzCtJLcpLzFFi42LZduzned2A66kpBp/2W1g8mLeNzeL6l+es Fntfb2W3+Nx7hNFixvl9TBZrj9xlt7jduILNgd3jzrU9bB59W1YxenzeJBfAHMVlk5Kak1mW WqRvl8CVca99NVPBfO6KM+1djA2Mpzi7GDk5JARMJO4f+c3SxcjFISSwglHiScsLNgjnC6PE ql1/mSCcz4wSmzcdYoNpudh6DKpqOaPE75n7GCGcViaJ//c+M4JUsQkYSnS97QLrEBFIl1hy /A9YEbPATkaJIwcbwRLCAiESJ1afArNZBFQl5uw6AGbzCthL7Pn+hx1inbzE/oNnmSHighIn Zz5hAbGZgeLNW2czgwyVEJjIITHhzCtGiAYXiUf/tkI1C0u8Or4FypaR+L9zPhNEQzujxILf 96GcCYwSDc9vQXVbS9w59wvoDA6gFZoS63fpg5gSAo4S0zr1IEw+iRtvBSFu4JOYtG06M0SY V6KjTQhihprErOPr4LYevHCJGcL2kFh1ZjUriC0kECtxe+JrtgmMCrOQfDYLyWezEE5YwMi8 ilE8tbQ4Nz212CgvtVyvODG3uDQvXS85P3cTIzC1nP53/MsOxuWvPuodYmTiYDzEKMHBrCTC G9iXnCLEm5JYWZValB9fVJqTWnyIUZqDRUmcV9v2ZLKQQHpiSWp2ampBahFMlomDU6qBqcUz wWXZjPkbzn5tfHiA6Sf3Nk7ruoydqRrX3uuvXCB4ukf7p8sEGeY4nRX77jw81LZg+Rl2G18d bp+GJz1XBBsmPJshE5vs0OF5x9R0R+fDU/e7eGt4WXT1nnz08M7We3pgnXrPFNHzPlembFDp 3vpo1qym48sC1V/byy91u3FV1JK5hTftZljN8rMFxVHTpjLfPf07MfuKQkNjWu+5PUo//nFM V/rNWS8bPOVBsKnBqY4stZmMGy0kJ15wfDvzcH/CNonYiQ+5uTMcl2pM3SwYtt4sxtVfqjWK 5XCH0cv1MTNX9drInz6Xuc3zX+bqvZdDMz54uf0x74zcyX1yg+1vm0t7hE/LX5r4/KzMMiWW 4oxEQy3mouJEAME8plicAwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrPLMWRmVeSWpSXmKPExsVy+t/xe7oB11NTDObdVrN4MG8bm8X1L89Z Lfa+3spu8bn3CKPFjPP7mCzWHrnLbnG7cQWbA7vHnWt72Dz6tqxi9Pi8SS6AOUrPpii/tCRV ISO/uMRWKdrQwkjP0NJCz8jEUs/Q2DzWyshUSd/OJiU1J7MstUjfLkEv4177aqaC+dwVZ9q7 GBsYT3F2MXJySAiYSFxsPcbWxcjFISSwlFHiyJ4WFoiEjMTJaQ2sELawxJ9rXVBFzUwSMxa9 YQJJsAkYSnS9BUlwcogIZEpM+HONHaSIWWA3o8SsPwuZQRLCAkESP9t/gdksAqoSc3YdAGvg FbCX2PP9DzvEBnmJ/QfPMkPEBSVOznwCdgUzULx562zmCYx8s5CkZiFJLWBkWsUoklpanJue W2ykV5yYW1yal66XnJ+7iREY0tuO/dyyg3Hlq496hxiZOBgPMUpwMCuJ8Ab2JacI8aYkVlal FuXHF5XmpBYfYjQFum8is5Rocj4wqvJK4g3NDEwNTcwsDUwtzYyVxHk9CzoShQTSE0tSs1NT C1KLYPqYODilGpg48rg2fVeUFPz5+phRPLNLh0ZQukbZKgEDoU6pEuXWz1fyF5Z9ven48Mdp l0NO17wfBjxz2fLpWsRCt8mtG5c1f9CbmW3PLc+1MmYRgwZTSFFam7vf6xNLC9avMrk5NSpZ WqTs+E+256cTZ+6fcW7n3oUyH3wUQ76oS0+SvtNS5KaT+yN5coXobmmnb1zRrZU/fkcrFTXI vrvPU7ZFOjWSy/7B+o63Xz4aRz2sk2j+7KtsNYPtRYlZQ3Xj8z2XNye9NdKboxtx6Jbg4oym N/+YRTq6i3Y/YffV3LnbVSspaen3RS97GMsy/F9lRbx8HbHSoXm7Rt/9A5uv8j+p+zdTbcPZ mjle0yVXVD4UO6jEUpyRaKjFXFScCAD5ad5z8gIAAA== X-CMS-MailID: 20230518074416eucas1p1dfd47a3438f2252211cf7daa82e2ac1e X-Msg-Generator: CA X-RootMTR: 20230518074416eucas1p1dfd47a3438f2252211cf7daa82e2ac1e X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20230518074416eucas1p1dfd47a3438f2252211cf7daa82e2ac1e References: Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Commit adf8238ef403 ("ARM: dts: exynos: move exynos-bus nodes out of soc in Exynos4412") changed the order of the exynos-bus nodes, what results in different probe order of the Exynos Bus devices. Although the driver properly handles the deferred probe and all devices seems to be finally properly registered, this change revealed some kind of a bug related to PPMU counters registration and passive governor operation. Usually in 1 of 10 boots this results in complete board freeze during loading of the kernel modules. To avoid that freeze, ensure that the Exynos PPMU driver is already loaded before the Exynos Bus driver starts probing. Signed-off-by: Marek Szyprowski Reviewed-by: Krzysztof Kozlowski --- This is a follow-up of the following discussion: https://lore.kernel.org/all/d287ca9f-b056-d39a-aa93-b0e2cb279f73@linaro.org/ --- drivers/devfreq/exynos-bus.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c index 88414445adf3..245898f1a88e 100644 --- a/drivers/devfreq/exynos-bus.c +++ b/drivers/devfreq/exynos-bus.c @@ -518,6 +518,7 @@ static struct platform_driver exynos_bus_platdrv = { }; module_platform_driver(exynos_bus_platdrv); +MODULE_SOFTDEP("pre: exynos_ppmu"); MODULE_DESCRIPTION("Generic Exynos Bus frequency driver"); MODULE_AUTHOR("Chanwoo Choi "); MODULE_LICENSE("GPL v2");