From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 805944D9F71; Wed, 16 Sep 2026 18:51:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789584692; cv=none; b=aD0GMQSG4/L6mENJdDUdnnBQnyMIVuhXc4uOGkFJkzNXCVVTx9Fegv+3+ppuknDwB8Uzp4sRFekLYjDc9I52ocpY1oL1xIIM4y9WtRznKBICyO4rKn85yAFEeQFWP6HVFM3b8UlUYvmgOQZ3IuYZJMZ6VRit875Y4FXSMkjYN7Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789584692; c=relaxed/simple; bh=ramL7xdD9jtHGHY2Qorfo6+ZVo3zQdSkyqF8PP/eEQE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=uJVfsERtALX/jK2FGKdmy3vyK9MrVffdG4zGFMY72E4+8Dt9JSo1+OW+YZ47LQiEtt+KRHsXPqHrOZChfv16TVLjMtMA8EVHbg0VpOA0EETRzaZbQoMR/gwxn/eKk2KCG8Zb4eCBdzb9PqTBiVvl/pZ6svQiYaRjWvhS04dvryE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VU4Muq9b; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="VU4Muq9b" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 80D9D1F000FF; Wed, 16 Sep 2026 18:51:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789584677; bh=f5WzQErrc+yFxfTGTKnaYzldCdgUA3IU5Oa6rEfLf/I=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=VU4Muq9bJiTCZC7j0bGisBsW0lFcvfQr1eIT5GbHcOq4ihTYZPT+tEuec5u2HhR/s 5sxDYtLwMTzKcJpzF04RmMm1H+qMowq7lu+yqIIc4zDqpsR0MmnkXWIe3wb8O+gMpi 8aeUZbCSI0xsDQ+FIVEYJ+TH0coN2thuQ7CIs8VCkL7l+YAx57AtED29VniDEOVcNJ VXuDqeaYWNZHfVvqpTxyXAeC0N9toddqs1P1HZTlOJ7JxPKj7Ftx9RLiYjl8ZFIQeR F8PP9JHEPVbHt75NVJcSFMfe8xJ020rSCaFBsQ+OB3x7qklbH+Nl1ZftVYC8IQrdF4 dVgIoKn7c+Ntw== Message-ID: <77f3693b-9d45-4a1a-b2fb-3b168bc8542e@kernel.org> Date: Wed, 16 Sep 2026 20:51:14 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] driver core/ACPI: Introduce companion_bus_register() To: "Rafael J. Wysocki" Cc: Greg Kroah-Hartman , Linux ACPI , LKML , Linux Driver Core Development References: <6329043.lOV4Wx5bFT@rafael.j.wysocki> From: Danilo Krummrich Content-Language: en-US In-Reply-To: <6329043.lOV4Wx5bFT@rafael.j.wysocki> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/9/26 6:41 PM, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki > > The ACPI bus type does not allow drivers to be registered, so the sysfs > attributes related to drivers created for it and its devices are > useless, and its drivers/ directory is always empty. All of that is > confusing and wasteful. > > To allow skipping the creation of those sysfs attributes, introduce a > "companion" bus type concept and add a special registration function for > registering "companion" bus types, companion_bus_register(). > > Signed-off-by: Rafael J. Wysocki Reviewed-by: Danilo Krummrich