From patchwork Tue Apr 26 20:51:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adam Ford X-Patchwork-Id: 12827966 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 DCB08C433F5 for ; Tue, 26 Apr 2022 20:53:15 +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=/l0a72sOw2J8R2pfiaf9tGjywvSUFaLTYFYre7ReAlA=; b=XVsyNxv+RPeJZr HxfdgFVJn8oXSNgUCDMBm3JCYqgBHaCJaa1iDhl79of4FwoJVL1UxABvH10nh7JaOW4+SZ/tbp3pZ +I+eat7hzL/HwbXwGX2DInBQriGa/pLnnBxL7UNbzkRgiVfHRg5qFvIpHp7v5B5yriyZsikrdVA7z /fsnfrPBK5Z7jwfXrwoW8hHilhBC+DUFmlOc7rEE4arkZA8WkL2LwfkjS3kfmtnpe/Q/Z7YbpEUew CwSgVdzaC31xgY2yGlR/Tv2WbQIzvvLq3NAzM4lBJ7X9Lta73tCUCcV0/5B5THdqgzT0XNe2gDVA9 CJbGQn0Gz6RSEYfg5FtA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1njSAO-00GDwL-8W; Tue, 26 Apr 2022 20:52:12 +0000 Received: from mail-io1-xd31.google.com ([2607:f8b0:4864:20::d31]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1njSAB-00GDut-BS for linux-arm-kernel@lists.infradead.org; Tue, 26 Apr 2022 20:52:00 +0000 Received: by mail-io1-xd31.google.com with SMTP id c125so51905iof.9 for ; Tue, 26 Apr 2022 13:51:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Z9te8WGe7DKXgWloXxVjeSM+TBUSZkaJoJ+1JH3t8Mo=; b=BSIz4uRHSy3oTtcALpdOR8Rxik3fYOZ8du7ydjjnBnGWwyXJLYsKC2fHkmPELtYUBE Yw27DdiRbw3KydtsQtPkXIFvDL7fAYOAX4Kg5g+rA53XbX5MxxqjX2+SBFO93qww3zb0 tS0xH/fhY3dymRbInsyG2JHC1AnpebunVCpffju+EIWOY8dg4lSoU9qzXNIC6WKYBl5i AEbXfHbz9EJp5gHI0qEt+81HwfVpzKkbHmUt8AfzA+u7MQt0WnhVkHVLWduDYUvJd6lb uEbU+8VBPi5xo4cZSjIzz06v74vVQhONjfwZkNiL8HwBLHGZ42yfT/N1BLz3lJypTaYD VMJg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Z9te8WGe7DKXgWloXxVjeSM+TBUSZkaJoJ+1JH3t8Mo=; b=4KxOX3xEcTwQ0VPsCxOVK++wdM8eHxt/p8ij7G2v5Hsicdxy6PbSvlaMtUu2OngP6T MtQHMY1zB/ThaE1QDR1CEYyNa8Pq+kXbgDGZd06tZrDyPyAyh46O88NJ8CFKOzSTGV5i VJAbY8y07qMzdwJCshbH/gzSL/v34D0uKbPHAg1Ufyh7c/A/g1wvKNv1EaiqFWizyLrf zjWuuTzGrFXLtmB3TKYE+SS65aqCD53b34VMWlZ+92Zn0EForQCNc+JPb1It8jyd7aGd vQy4L2Ihwsjo+CwGcli4wefnS2qpQL8QKlD84ztohKljCMhKqrokZgFIoPwna6lPiwMQ cT4A== X-Gm-Message-State: AOAM532AvIUCeaumu9r7Cs1DZOYnkt1rolwXgIjTTUZmoQ9oARSmsSg+ /ITSOa9c7XJ31PnqeGOaj8MSAU6sEUI= X-Google-Smtp-Source: ABdhPJwDEZ+j0VYgzw/LdVOoCoUhoRGvoTd4cS+ipdobfJH+QQY/RAm6OE62RpFR6d0RUJSHMRb+1g== X-Received: by 2002:a05:6602:1233:b0:657:b1d2:c31a with SMTP id z19-20020a056602123300b00657b1d2c31amr231699iot.35.1651006315675; Tue, 26 Apr 2022 13:51:55 -0700 (PDT) Received: from aford-IdeaCentre-A730.lan ([2601:448:8400:9e8:fb7a:66f4:d9a8:dadb]) by smtp.gmail.com with ESMTPSA id r9-20020a6b6009000000b006412abddbbbsm9853798iog.24.2022.04.26.13.51.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Apr 2022 13:51:54 -0700 (PDT) From: Adam Ford To: linux-arm-kernel@lists.infradead.org Cc: shawnguo@kernel.org, aford@beaconembedded.com, Adam Ford Subject: [PATCH 2/2] arm64: dts: imx8mn-beacon: Enable RTS-CTS on UART3 Date: Tue, 26 Apr 2022 15:51:44 -0500 Message-Id: <20220426205144.476234-2-aford173@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220426205144.476234-1-aford173@gmail.com> References: <20220426205144.476234-1-aford173@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220426_135159_426246_83FFB227 X-CRM114-Status: UNSURE ( 9.05 ) X-CRM114-Notice: Please train this message. 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 a header for a DB9 serial port, but any attempts to use hardware handshaking fail. Enable RTS and CTS pin muxing and enable handshaking in the uart node. Signed-off-by: Adam Ford diff --git a/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi index 0f40b43ac091..02f37dcda7ed 100644 --- a/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi @@ -175,6 +175,7 @@ &uart3 { pinctrl-0 = <&pinctrl_uart3>; assigned-clocks = <&clk IMX8MN_CLK_UART3>; assigned-clock-parents = <&clk IMX8MN_SYS_PLL1_80M>; + uart-has-rtscts; status = "okay"; }; @@ -258,6 +259,8 @@ pinctrl_uart3: uart3grp { fsl,pins = < MX8MN_IOMUXC_ECSPI1_SCLK_UART3_DCE_RX 0x40 MX8MN_IOMUXC_ECSPI1_MOSI_UART3_DCE_TX 0x40 + MX8MN_IOMUXC_ECSPI1_MISO_UART3_DCE_CTS_B 0x40 + MX8MN_IOMUXC_ECSPI1_SS0_UART3_DCE_RTS_B 0x40 >; };