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 C97E9C46467 for ; Mon, 16 Jan 2023 15:03:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232834AbjAPPDN (ORCPT ); Mon, 16 Jan 2023 10:03:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58054 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233008AbjAPPBS (ORCPT ); Mon, 16 Jan 2023 10:01:18 -0500 Received: from muru.com (muru.com [72.249.23.125]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 257DA25E07; Mon, 16 Jan 2023 06:52:00 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTPS id 29C2A8108; Mon, 16 Jan 2023 14:51:59 +0000 (UTC) Date: Mon, 16 Jan 2023 16:51:57 +0200 From: Tony Lindgren To: Adam Ford Cc: Andreas Kemnade , bcousson@baylibre.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, linux-omap@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, "H. Nikolaus Schaller" Subject: Re: [PATCH] ARM: dts: gta04: fix excess dma channel usage Message-ID: References: <20230113211151.2314874-1-andreas@kemnade.info> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Hi, * Adam Ford [230116 14:16]: > Would it make sense to make this default in the omap3.dtsi file and > enable them in the individual boards that need it? In general disabling the unused devices by default for omaps will break the power management. The disabled devices are completely ignored by the kernel, and the devices are left to whatever the bootloader state might be. For SoCs using firmware to manage devices it's a bit different story however. The firmware can still idle disabled devices based on a late_initcall for example, even if the kernel knows nothing about the disabled devices. Regards, Tony