From patchwork Thu Dec 12 09:17:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Defa Li X-Patchwork-Id: 13904875 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 89785E77180 for ; Thu, 12 Dec 2024 09:17:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=axvJlHiBR2zkbU+O3koSZ3ET0NsXqwruLo6eqUrj9fI=; b=HkmMtsNwYTIgHZ+pOtimuga1dq G7iJuti+7Raa8YewdI2H6C4DamDv6XBf2tP4gy2O2EkE8X1aQyuDyHsupKxO+Xo5fVQt2iM7vrHqi OAzGRR7Yd3MT3Ugg5aZmkdF5By3yEggxMogtrsDS8/EOq7N8h1MkPv5AAzKNaaoawL404G2GSsYNo SkqDa9a87yRDv7U367JjH8spEIi7bt9mQBEFwXupbKbazGpzj4p2+P0qiMgplDtA9QLFElYNCRojZ dXp6fVkpyJAd3Z6sZG4vixbcJz99Z9RjD6/WcJRscniDfXKXjWET+kvAmDZLT/PeOyYZ9HzdMs8fp ssR09ElQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tLfJx-0000000HRzY-1VNk; Thu, 12 Dec 2024 09:17:21 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tLfIt-0000000HRmr-0C5Z; Thu, 12 Dec 2024 09:16:16 +0000 X-UUID: b941dadab86911ef82ff63e91e7eb18c-20241212 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=axvJlHiBR2zkbU+O3koSZ3ET0NsXqwruLo6eqUrj9fI=; b=ZJKwGNvkU/GyPkSeEtYc0qHr7kwaT/OBq/q9QXlJo31dpS1mvRaCNjQK291oPqXtUgKNrvwagzggRdIhPA15TIdQWcb/Lfb7R3IlZ+xPdzygh9D654zjbPZ4rDnkfL+lH8EqEErRQtv+UB0KHOSDppxZFmRs3zjUGopnm5UH/Pg=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.45,REQID:14056c1b-b5fa-40f4-b406-9b7167ae2524,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:6493067,CLOUDID:75616828-d2eb-4de2-b5c9-495d1bc17256,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES :1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_ULN X-UUID: b941dadab86911ef82ff63e91e7eb18c-20241212 Received: from mtkmbs10n1.mediatek.inc [(172.21.101.34)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1197075212; Thu, 12 Dec 2024 02:16:09 -0700 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by MTKMBS09N2.mediatek.inc (172.21.101.94) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Thu, 12 Dec 2024 17:16:06 +0800 Received: from mbjsdccf07.gcn.mediatek.inc (10.15.20.246) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Thu, 12 Dec 2024 17:16:05 +0800 From: Defa Li To: Alexandre Belloni , Matthias Brugger , AngeloGioacchino Del Regno CC: , , , , , , , , Defa Li Subject: [PATCH v2] i3c: master: Improve initialization of numbered I2C adapters Date: Thu, 12 Dec 2024 17:17:53 +0800 Message-ID: <20241212091818.8591-1-defa.li@mediatek.com> X-Mailer: git-send-email 2.45.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241212_011615_089771_5F6D8BD5 X-CRM114-Status: GOOD ( 12.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add logic to initialize I2C adapters with a specific ID if available, improving device identification and configuration. For mixed buses, in addition to the i3c alias, an i2c alias can be added to assign a fixed bus number to the i2c adapter. This allows an alias node such as: aliases { i2c2 = &mixed_bus_a, i3c2 = &mixed_bus_a, i3c4 = &mixed_bus_b, }; /* assigned "i3c-2" and "i2c-2" */ mixed_bus_a: i3c-master { }; If there is no i2c alias for a mixed bus, the i2c adapter numbers will remain as is and will be assigned starting after the highest fixed bus number. /* assigned "i3c-4" and likely assigned "i2c-3" */ mixed_bus_b: i3c-master { }; v2: - Modify commit message and code format issues Signed-off-by: Defa Li --- drivers/i3c/master.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index 42310c9a00c2..92223e0b6e59 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -2486,7 +2486,7 @@ static int i3c_master_i2c_adapter_init(struct i3c_master_controller *master) struct i2c_adapter *adap = i3c_master_to_i2c_adapter(master); struct i2c_dev_desc *i2cdev; struct i2c_dev_boardinfo *i2cboardinfo; - int ret; + int ret, id = -ENODEV; adap->dev.parent = master->dev.parent; adap->owner = master->dev.parent->driver->owner; @@ -2497,7 +2497,15 @@ static int i3c_master_i2c_adapter_init(struct i3c_master_controller *master) adap->timeout = 1000; adap->retries = 3; - ret = i2c_add_adapter(adap); + if (master->dev.of_node) + id = of_alias_get_id(master->dev.of_node, "i2c"); + + if (id >= 0) { + adap->nr = id; + ret = i2c_add_numbered_adapter(adap); + } else { + ret = i2c_add_adapter(adap); + } if (ret) return ret;