From patchwork Fri Aug 26 11:56:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 12955931 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 42207ECAAD4 for ; Fri, 26 Aug 2022 11:57:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: 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: List-Owner; bh=R9Leug1kthZN1ciykHPCehKtM1olGB0891icQwdP2OU=; b=caRDyWKyNa2/do kyLg4ygPtyAi9ZGv1MK6IyfcB5czFBSiyS/4AgoFtRrnbpds2TACPfltMYdKncqi4HPS/gDpb98b1 7tE/mNUA92LULDez1TwtFCiayIz+UnGcnLLAJ8fARsL8XzL7rM9NzD5zf24XpmA4yRuLIZtuZD3KP CrL+CFEXn4+WabjG6JnLjzIHf4fU6OnOAexgrV6nNePCiTFTyBCCT9KKMoRYbqEI9/66MXp80SvwT m/2dniMHMpcOrUgO5aKBksk8tNx0WFWpbehaLmJuZrh22EX8Lpup0iCKuHffAYjaimZJAi30RcJHw W3HyfO3f/qTOjFJg5D3g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oRXx6-002El3-5e; Fri, 26 Aug 2022 11:56:44 +0000 Received: from 0001.3ffe.de ([159.69.201.130] helo=mail.3ffe.de) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oRXwd-002EBu-A6 for linux-arm-kernel@lists.infradead.org; Fri, 26 Aug 2022 11:56:16 +0000 Received: from mwalle01.kontron.local. (unknown [213.135.10.150]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.3ffe.de (Postfix) with ESMTPSA id 703F483E3; Fri, 26 Aug 2022 13:56:13 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2022082101; t=1661514973; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=gWGyQWM8OXSvJySwbiAhGUCbHok4M4ZkpORs44F2o94=; b=R9GgofqNh8ffJi2Q++3eaQW8kyZebCFvo6relTQwzWR6tRt6nSXNv9+Mi/sZXXnAnL5uuG z/f7eXXsENymMEMqVdbUbhG5SQv1aWcLasxq5e61Go2eb2+b8/ok2kxY78u2vgpYGjAZRX RCMCAMCDKX78znzg5aBZTusX0IlpFRsk03tktYLkDYjlGoqiDtHB4OM5jiRaEywVWYF8IJ mn0FotCsN81g84tzOvaP21hskr0UyARWF0mbIT7ExqdFxAux5pdDifN0kqJ2F2OBj9FGph aFWhQgH8VeeulDulnSo5zTvcFwMd+3hdxhN0nzHRPpyiVcRw+7ZX2n0WvRg1hQ== From: Michael Walle To: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Lars Povlsen , Steen Hegelund , Horatiu Vultur , Philipp Zabel Cc: UNGLinuxDriver@microchip.com, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Michael Walle Subject: [PATCH 3/3] net: lan966x: make reset optional Date: Fri, 26 Aug 2022 13:56:07 +0200 Message-Id: <20220826115607.1148489-4-michael@walle.cc> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220826115607.1148489-1-michael@walle.cc> References: <20220826115607.1148489-1-michael@walle.cc> MIME-Version: 1.0 X-Spam: Yes X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220826_045615_519721_737D2110 X-CRM114-Status: GOOD ( 11.68 ) 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 There is no dedicated reset for just the switch core. The reset which is used up until now, is more of a global reset, resetting almost the whole SoC and cause spurious errors by doing so. Make it possible to handle the reset elsewhere and mark the reset as optional. Signed-off-by: Michael Walle --- drivers/net/ethernet/microchip/lan966x/lan966x_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c index 2ad078608c45..e2c77f954a3d 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c @@ -971,7 +971,8 @@ static int lan966x_reset_switch(struct lan966x *lan966x) int val = 0; int ret; - switch_reset = devm_reset_control_get_shared(lan966x->dev, "switch"); + switch_reset = devm_reset_control_get_optional_shared(lan966x->dev, + "switch"); if (IS_ERR(switch_reset)) return dev_err_probe(lan966x->dev, PTR_ERR(switch_reset), "Could not obtain switch reset");