From patchwork Tue Feb 21 21:26:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eddie James X-Patchwork-Id: 13148430 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 EAD0AC636D7 for ; Tue, 21 Feb 2023 21:26:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229812AbjBUV04 (ORCPT ); Tue, 21 Feb 2023 16:26:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58068 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229930AbjBUV0z (ORCPT ); Tue, 21 Feb 2023 16:26:55 -0500 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D01F31E2E; Tue, 21 Feb 2023 13:26:52 -0800 (PST) Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 31LLHNOo021477; Tue, 21 Feb 2023 21:26:37 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=tlmEo/kVrmSoI+f5eQKxgmNkhnCo7i/A1GBB4psqyLY=; b=OBl7OMbKnNLv4HIVMcac0weSE79GaNK7Nh9Sz0ZxWNFD3kdTzhit0RhVj5DOEqFtOEdg h8TONH3PEKly282q5v9oEQFEGE+IuMRK5azooUB+KV0eh4WhEqk3hhTHv+9/OkyvqDcE cJGRzFZ5M370zF07F8G4y5UFTgPV1fTrPLed9jcCuyio3gLzDZ4G+m8qxx4NQQoMwtu4 Z92h7DUSYNH01wjJ1Yi1iVFZD9XP33TrOHk21ws6vybkfWjM8EFZesc2E6+uuAwkwMx7 juEMzy/0ZPQYQX9OfVGvXuVZa/f1927hwSYsYqI+nb/hiuj5vOBnIrPkr5/7KRsX9LpO Jg== Received: from ppma02wdc.us.ibm.com (aa.5b.37a9.ip4.static.sl-reverse.com [169.55.91.170]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3nw408anp9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Feb 2023 21:26:37 +0000 Received: from pps.filterd (ppma02wdc.us.ibm.com [127.0.0.1]) by ppma02wdc.us.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 31LHk5Fk016332; Tue, 21 Feb 2023 21:26:36 GMT Received: from smtprelay07.wdc07v.mail.ibm.com ([9.208.129.116]) by ppma02wdc.us.ibm.com (PPS) with ESMTPS id 3ntpa7cve1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Feb 2023 21:26:36 +0000 Received: from smtpav02.wdc07v.mail.ibm.com (smtpav02.wdc07v.mail.ibm.com [10.39.53.229]) by smtprelay07.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 31LLQZR78913528 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 21 Feb 2023 21:26:35 GMT Received: from smtpav02.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2A46858058; Tue, 21 Feb 2023 21:26:35 +0000 (GMT) Received: from smtpav02.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 53F3658059; Tue, 21 Feb 2023 21:26:33 +0000 (GMT) Received: from slate16.aus.stglabs.ibm.com (unknown [9.65.223.120]) by smtpav02.wdc07v.mail.ibm.com (Postfix) with ESMTP; Tue, 21 Feb 2023 21:26:33 +0000 (GMT) From: Eddie James To: linux-fsi@lists.ozlabs.org Cc: rostedt@goodmis.org, linux-trace-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, mhiramat@kernel.org, alistair@popple.id.au, joel@jms.id.au, jk@ozlabs.org, andrew@aj.id.au, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, eajames@linux.ibm.com Subject: [PATCH v5 5/6] fsi: Add aliased device numbering Date: Tue, 21 Feb 2023 15:26:21 -0600 Message-Id: <20230221212622.3897097-6-eajames@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230221212622.3897097-1-eajames@linux.ibm.com> References: <20230221212622.3897097-1-eajames@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: HAWDVR9h4wuQ3VjHjodaFyZzJAigu9dU X-Proofpoint-ORIG-GUID: HAWDVR9h4wuQ3VjHjodaFyZzJAigu9dU X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.170.22 definitions=2023-02-21_12,2023-02-20_02,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 mlxscore=0 suspectscore=0 impostorscore=0 spamscore=0 lowpriorityscore=0 mlxlogscore=999 adultscore=0 clxscore=1015 malwarescore=0 priorityscore=1501 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302210182 Precedence: bulk List-ID: X-Mailing-List: linux-trace-kernel@vger.kernel.org The I2C and SPI subsystems can use an aliased name to number the device. Add similar support to the FSI subsystem for any device type. Signed-off-by: Eddie James --- drivers/fsi/fsi-core.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c index d591e68afd11..b77013b9d8a7 100644 --- a/drivers/fsi/fsi-core.c +++ b/drivers/fsi/fsi-core.c @@ -955,9 +955,34 @@ static int __fsi_get_new_minor(struct fsi_slave *slave, enum fsi_dev_type type, return 0; } +static const char *const fsi_dev_type_names[] = { + "cfam", + "sbefifo", + "scom", + "occ", +}; + int fsi_get_new_minor(struct fsi_device *fdev, enum fsi_dev_type type, dev_t *out_dev, int *out_index) { + if (fdev->dev.of_node) { + int aid = of_alias_get_id(fdev->dev.of_node, fsi_dev_type_names[type]); + + if (aid >= 0) { + int id = (aid << 4) | type; + + id = ida_simple_get(&fsi_minor_ida, id, id + 1, GFP_KERNEL); + if (id >= 0) { + *out_index = aid; + *out_dev = fsi_base_dev + id; + return 0; + } + + if (id != -ENOSPC) + return id; + } + } + return __fsi_get_new_minor(fdev->slave, type, out_dev, out_index); } EXPORT_SYMBOL_GPL(fsi_get_new_minor);