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 B2DD1C48BF9 for ; Wed, 15 Nov 2023 13:54:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234542AbjKONyH (ORCPT ); Wed, 15 Nov 2023 08:54:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49184 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230336AbjKONyF (ORCPT ); Wed, 15 Nov 2023 08:54:05 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id B231EAF; Wed, 15 Nov 2023 05:54:02 -0800 (PST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 12847DA7; Wed, 15 Nov 2023 05:54:48 -0800 (PST) Received: from [192.168.1.3] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id EBC473F641; Wed, 15 Nov 2023 05:54:00 -0800 (PST) Message-ID: <92d6a66d-3270-3378-2ab9-9214c004d5c7@arm.com> Date: Wed, 15 Nov 2023 13:53:59 +0000 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.15.1 Subject: Re: [PATCH 4/7] coresight: tpiu: Move ACPI support from AMBA driver to platform driver Content-Language: en-US To: Anshuman Khandual , linux-arm-kernel@lists.infradead.org, suzuki.poulose@arm.com Cc: Lorenzo Pieralisi , Sudeep Holla , Mike Leach , Maxime Coquelin , Alexandre Torgue , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, coresight@lists.linaro.org, linux-stm32@st-md-mailman.stormreply.com References: <20231027072943.3418997-1-anshuman.khandual@arm.com> <20231027072943.3418997-5-anshuman.khandual@arm.com> From: James Clark In-Reply-To: <20231027072943.3418997-5-anshuman.khandual@arm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 27/10/2023 08:29, Anshuman Khandual wrote: > Add support for the tpiu device in the platform driver, which can then be > used on ACPI based platforms. This change would now allow runtime power > management for ACPI based systems. The driver would try to enable the APB > clock if available. > [...] > +#ifdef CONFIG_ACPI > +static const struct acpi_device_id tpiu_acpi_ids[] = { > + {"ARMHC979", 0}, /* ARM CoreSight TPIU */ > + {} > +}; > +MODULE_DEVICE_TABLE(acpi, tpiu_acpi_ids); > +#endif > + > +static struct platform_driver tpiu_platform_driver = { > + .probe = tpiu_platform_probe, > + .remove = tpiu_platform_remove, > + .driver = { > + .name = "coresight-tpiu-platform", > + .acpi_match_table = ACPI_PTR(tpiu_acpi_ids), > + .suppress_bind_attrs = true, > + .pm = &tpiu_dev_pm_ops, > + }, > +}; > +module_platform_driver(tpiu_platform_driver); > + Is there a special build config where this works? I get an error here because module_platform_driver() redefines things that are in module_amba_driver() which is defined above: module_amba_driver(tpiu_driver); This isn't a W=1 build or anything, just a normal one. And it applies to most of the patches in this set.