From patchwork Fri Mar 3 17:04:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eddie James X-Patchwork-Id: 13159030 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 E73E8C7EE2D for ; Fri, 3 Mar 2023 17:05:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231599AbjCCRE7 (ORCPT ); Fri, 3 Mar 2023 12:04:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50504 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231540AbjCCREr (ORCPT ); Fri, 3 Mar 2023 12:04:47 -0500 Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 901E622DC5; Fri, 3 Mar 2023 09:04:46 -0800 (PST) Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 323Fqs5a032495; Fri, 3 Mar 2023 17:04:31 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=Vah+gJKk5k65cADWQUG4eH2IMJBqXq7d7Y+v8zl9+Y7ohdRZP3eLx1SeXWodyBSawlq6 WAhnPHIM4oCL21olAqTcYex4dyOzlTYU9DEuQxOmxYt8tu9BIqC6WwLZpUcOA2TfYezi v8lUxbGAiVWnhpf8mrOWL8TX+l8rGRAZ4xx8sDOYzs3rMgVl2wM7D1ljRhbqPH5GIY+X yiLLnhtxuWYbNAy6s6eiHSdwSKZRu6+v1Eo+i2cJUU8Jj1ENz6udDVk/2QdoC7Koi/L9 oqKRdDnKjjluSXV/3q738s1+qtSJP//V+VqRIZ1qRhvjjFJ+Rqko6aR80iJ9ewjNdRFG lg== Received: from ppma04wdc.us.ibm.com (1a.90.2fa9.ip4.static.sl-reverse.com [169.47.144.26]) by mx0b-001b2d01.pphosted.com (PPS) with ESMTPS id 3p3kx4a1w2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 03 Mar 2023 17:04:31 +0000 Received: from pps.filterd (ppma04wdc.us.ibm.com [127.0.0.1]) by ppma04wdc.us.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 323EKZo2019104; Fri, 3 Mar 2023 17:04:30 GMT Received: from smtprelay07.wdc07v.mail.ibm.com ([9.208.129.116]) by ppma04wdc.us.ibm.com (PPS) with ESMTPS id 3nybduuybd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 03 Mar 2023 17:04:30 +0000 Received: from smtpav05.wdc07v.mail.ibm.com (smtpav05.wdc07v.mail.ibm.com [10.39.53.232]) by smtprelay07.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 323H4TNq60817778 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 3 Mar 2023 17:04:29 GMT Received: from smtpav05.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 961FD58043; Fri, 3 Mar 2023 17:04:29 +0000 (GMT) Received: from smtpav05.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B6E1758053; Fri, 3 Mar 2023 17:04:27 +0000 (GMT) Received: from slate16.aus.stglabs.ibm.com (unknown [9.77.137.234]) by smtpav05.wdc07v.mail.ibm.com (Postfix) with ESMTP; Fri, 3 Mar 2023 17:04:27 +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 v7 5/7] fsi: Add aliased device numbering Date: Fri, 3 Mar 2023 11:04:14 -0600 Message-Id: <20230303170416.1347530-6-eajames@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230303170416.1347530-1-eajames@linux.ibm.com> References: <20230303170416.1347530-1-eajames@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: VYi3n3M2Z1-I9cRhMl_XUR_cxkO7i_-0 X-Proofpoint-ORIG-GUID: VYi3n3M2Z1-I9cRhMl_XUR_cxkO7i_-0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-03_03,2023-03-03_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 spamscore=0 bulkscore=0 phishscore=0 adultscore=0 malwarescore=0 impostorscore=0 suspectscore=0 priorityscore=1501 mlxscore=0 mlxlogscore=999 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2303030143 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);