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 X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BEF08C2BA19 for ; Tue, 14 Apr 2020 18:17:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A6D9E20767 for ; Tue, 14 Apr 2020 18:17:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2503761AbgDNSRe (ORCPT ); Tue, 14 Apr 2020 14:17:34 -0400 Received: from mga14.intel.com ([192.55.52.115]:2610 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2503751AbgDNSR0 (ORCPT ); Tue, 14 Apr 2020 14:17:26 -0400 IronPort-SDR: RDWvki/Mb/EmFIqeFt9tNq4A85Pxwl6gYAatOqdPajWN9voNytS5egprwSA3HUed28tw8sBKsA 6CERGpoqrm+Q== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2020 11:17:25 -0700 IronPort-SDR: zetcgI7Tu/vLLfaxeuL+7qG30tlfoiwW1C/aRreTbnxRrJpMKduGR6ULAHtMhkjjgKdDMDwX+r SAp+x+sP71sA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,383,1580803200"; d="scan'208";a="253273018" Received: from svarahab-mobl.amr.corp.intel.com (HELO [10.212.190.40]) ([10.212.190.40]) by orsmga003.jf.intel.com with ESMTP; 14 Apr 2020 11:17:20 -0700 Subject: Re: [RFC PATCH 02/16] ASoC: pcm512x: use "sclk" string to retrieve clock To: Mark Brown Cc: alsa-devel@alsa-project.org, tiwai@suse.de, Andy Shevchenko , Daniel Matuschek , Matthias Reichl , Hui Wang , linux-gpio@vger.kernel.org, Linus Walleij , Bartosz Golaszewski , linux-clk@vger.kernel.org, Michael Turquette , Stephen Boyd , Rob Herring References: <20200409195841.18901-1-pierre-louis.bossart@linux.intel.com> <20200409195841.18901-3-pierre-louis.bossart@linux.intel.com> <20200414174530.GK5412@sirena.org.uk> From: Pierre-Louis Bossart Message-ID: <8ee01a4f-ceb2-d207-7cef-cf766fa670af@linux.intel.com> Date: Tue, 14 Apr 2020 13:14:41 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <20200414174530.GK5412@sirena.org.uk> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org On 4/14/20 12:45 PM, Mark Brown wrote: > On Thu, Apr 09, 2020 at 02:58:27PM -0500, Pierre-Louis Bossart wrote: >> Using devm_clk_get() with a NULL string fails on ACPI platforms, use >> the "sclk" string as a fallback. > > Is this something that could be fixed at the ACPI level? I guess to fix this we'd need some sort of ACPI-level connection or description of the clock, and I've never seen such a description? All the examples I've seen use an explicit 'mclk' string (that's e.g. what we did for the PMC clocks for Baytrail/Cherrytrail machine drivers, we added a lookup). Here I used 'sclk' since it's what TI refers to in their documentation. I vaguely recall AMD had similar issues with another codec.