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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 CBF11CA9EA0 for ; Tue, 22 Oct 2019 23:48:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AD2382075A for ; Tue, 22 Oct 2019 23:48:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389808AbfJVXsr (ORCPT ); Tue, 22 Oct 2019 19:48:47 -0400 Received: from mga07.intel.com ([134.134.136.100]:55767 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732393AbfJVXsq (ORCPT ); Tue, 22 Oct 2019 19:48:46 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 22 Oct 2019 16:48:46 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,218,1569308400"; d="scan'208";a="399211295" Received: from srajamoh-mobl2.amr.corp.intel.com (HELO pbossart-mobl3.intel.com) ([10.251.20.203]) by fmsmga006.fm.intel.com with ESMTP; 22 Oct 2019 16:48:43 -0700 From: Pierre-Louis Bossart To: alsa-devel@alsa-project.org Cc: linux-kernel@vger.kernel.org, tiwai@suse.de, broonie@kernel.org, vkoul@kernel.org, gregkh@linuxfoundation.org, jank@cadence.com, srinivas.kandagatla@linaro.org, slawomir.blauciak@intel.com, Bard liao , Rander Wang , Ranjani Sridharan , Pierre-Louis Bossart , Sanyog Kale Subject: [PATCH 1/3] soundwire: remove bitfield for unique_id, use u8 Date: Tue, 22 Oct 2019 18:48:06 -0500 Message-Id: <20191022234808.17432-2-pierre-louis.bossart@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191022234808.17432-1-pierre-louis.bossart@linux.intel.com> References: <20191022234808.17432-1-pierre-louis.bossart@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There is no good reason why the unique_id needs to be stored as 4 bits. The code will work without changes with a u8 since all values are already filtered while parsing the ACPI tables and Slave devID registers. Use u8 representation. This will allow us to encode a "IGNORE_UNIQUE_ID" value to account for firmware/BIOS creativity. Signed-off-by: Pierre-Louis Bossart --- include/linux/soundwire/sdw.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index 688b40e65c89..28745b9ba279 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -403,6 +403,8 @@ int sdw_slave_read_prop(struct sdw_slave *slave); * SDW Slave Structures and APIs */ +#define SDW_IGNORED_UNIQUE_ID 0xFF + /** * struct sdw_slave_id - Slave ID * @mfg_id: MIPI Manufacturer ID @@ -418,7 +420,7 @@ struct sdw_slave_id { __u16 mfg_id; __u16 part_id; __u8 class_id; - __u8 unique_id:4; + __u8 unique_id; __u8 sdw_version:4; }; -- 2.20.1