From patchwork Mon Jun 12 19:56:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eddie James X-Patchwork-Id: 692287 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 67FD1C88CB6 for ; Mon, 12 Jun 2023 19:57:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237807AbjFLT5W (ORCPT ); Mon, 12 Jun 2023 15:57:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35644 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231586AbjFLT5S (ORCPT ); Mon, 12 Jun 2023 15:57:18 -0400 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 441D310CE; Mon, 12 Jun 2023 12:57:17 -0700 (PDT) Received: from pps.filterd (m0353723.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 35CJkitR021431; Mon, 12 Jun 2023 19:57:01 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=DLaBOLn0EU2UqSjNssyoDM514KRUd1WFxYbQZp8E4yCXSPq26s3ZEyUoeSHfLD5WOEe9 g86lnKasOpDgHSIBlIkN8FK4+BUzMdCkrX4Utx9aMIRwUtFXhQSnK8qa+JGUUGsW/7z9 iimtqXcbr2s/7bR/csFTATVlcsxrqjUR8UyksvQ5ZdogoeF/RY6WhPsurMu0rvTaxHyQ Gzvnra0cvkZSTAaU4nO1MIhGRUsMPJww0Fv3UCHoUFNRf4Xiufyp8gHd07YILW4fH99R RuyoXkr3ZKW8sJyAv9mI76crN/YpdzRI0bjOogz6j3PckSnkZduCphURQRdkLV9nfuO0 aw== Received: from ppma03wdc.us.ibm.com (ba.79.3fa9.ip4.static.sl-reverse.com [169.63.121.186]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3r69tqg6af-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 12 Jun 2023 19:57:00 +0000 Received: from pps.filterd (ppma03wdc.us.ibm.com [127.0.0.1]) by ppma03wdc.us.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 35CHjMA8002823; Mon, 12 Jun 2023 19:57:00 GMT Received: from smtprelay01.wdc07v.mail.ibm.com ([9.208.129.119]) by ppma03wdc.us.ibm.com (PPS) with ESMTPS id 3r4gt5cm95-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 12 Jun 2023 19:56:59 +0000 Received: from smtpav06.dal12v.mail.ibm.com (smtpav06.dal12v.mail.ibm.com [10.241.53.105]) by smtprelay01.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 35CJuwhC20382182 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 12 Jun 2023 19:56:59 GMT Received: from smtpav06.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 987D858059; Mon, 12 Jun 2023 19:56:58 +0000 (GMT) Received: from smtpav06.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4647458043; Mon, 12 Jun 2023 19:56:58 +0000 (GMT) Received: from slate16.aus.stglabs.ibm.com (unknown [9.61.148.226]) by smtpav06.dal12v.mail.ibm.com (Postfix) with ESMTP; Mon, 12 Jun 2023 19:56:58 +0000 (GMT) From: Eddie James To: linux-fsi@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, jk@ozlabs.org, joel@jms.id.au, alistair@popple.id.au, andrew@aj.id.au, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, devicetree@vger.kernel.org Subject: [PATCH 02/14] fsi: Add aliased device numbering Date: Mon, 12 Jun 2023 14:56:45 -0500 Message-Id: <20230612195657.245125-3-eajames@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230612195657.245125-1-eajames@linux.ibm.com> References: <20230612195657.245125-1-eajames@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 86MVaul5xD8OlY_TYUOyItXfR7hLhC8W X-Proofpoint-ORIG-GUID: 86MVaul5xD8OlY_TYUOyItXfR7hLhC8W X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-06-12_14,2023-06-12_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 mlxlogscore=999 clxscore=1015 mlxscore=0 spamscore=0 suspectscore=0 bulkscore=0 impostorscore=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2306120169 Precedence: bulk List-ID: X-Mailing-List: devicetree@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);