From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B20D0C43381 for ; Thu, 21 Feb 2019 17:18:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7FC7A2083E for ; Thu, 21 Feb 2019 17:18:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728686AbfBURSi (ORCPT ); Thu, 21 Feb 2019 12:18:38 -0500 Received: from mx-ginzinger.sigmacloud.services ([185.154.235.147]:55548 "EHLO mx-ginzinger.sigmacloud.services" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728574AbfBURSh (ORCPT ); Thu, 21 Feb 2019 12:18:37 -0500 Received: from [31.193.165.228] (port=5985 helo=mx-ginzinger.sigmacloud.services) by mx-ginzinger.sigmacloud.services with esmtps (TLSv1.2:AES256-GCM-SHA384:256) (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1gwrzI-00028r-2f; Thu, 21 Feb 2019 18:18:20 +0100 Received: from martin-laptop.buero.ginzinger.com (10.10.1.120) by exc1.buero.ginzinger.com (10.1.1.204) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1466.3; Thu, 21 Feb 2019 18:18:20 +0100 X-CTCH-RefID: str=0001.0A0B020F.5C6EDD5C.006A,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 From: Martin Kepplinger To: , , , , , , , , , , , , , , CC: , Martin Kepplinger Subject: [PATCH v2 3/9] serial: core: add rs485-rts-delay-us devicetree property for RS485 Date: Thu, 21 Feb 2019 18:17:52 +0100 Message-ID: <20190221171758.10322-3-martin.kepplinger@ginzinger.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190221171758.10322-1-martin.kepplinger@ginzinger.com> References: <20190221171758.10322-1-martin.kepplinger@ginzinger.com> X-Originating-IP: [10.10.1.120] X-ClientProxiedBy: exc1.buero.ginzinger.com (10.1.1.204) To exc1.buero.ginzinger.com (10.1.1.204) X-EXCLAIMER-MD-ORIGINAL-SUBJECT: [NOSIG][NODISC][PATCH v2 3/9] serial: core: add rs485-rts-delay-us devicetree property for RS485 X-EXCLAIMER-MD-CONFIG: 9dd172f7-de2e-4231-b886-ec11f46e03b3 MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg="sha-256"; boundary="----3DBD1F31B6509AA155215A088A5181A9" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an S/MIME signed message ------3DBD1F31B6509AA155215A088A5181A9 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain struct serial_rs485 now optionally holds the rts delay values in microseconds. Users can set these delays in their devicetree descriptions, so this adds the microseconds-option with the "rs485-rts-delay-us" boolean property. Signed-off-by: Martin Kepplinger --- Documentation/devicetree/bindings/serial/rs485.txt | 1 + drivers/tty/serial/serial_core.c | 11 +++++++++++ 2 files changed, 12 insertions(+) diff --git a/Documentation/devicetree/bindings/serial/rs485.txt b/Documentation/devicetree/bindings/serial/rs485.txt index b92592dff6dd..77396c62b383 100644 --- a/Documentation/devicetree/bindings/serial/rs485.txt +++ b/Documentation/devicetree/bindings/serial/rs485.txt @@ -12,6 +12,7 @@ Optional properties: * b is the delay between end of data sent and rts signal in milliseconds it corresponds to the delay after sending data and actual release of the line. If this property is not specified, <0 0> is assumed. +- rs485-rts-delay-us: the same as rs485-rts-delay, but in microseconds. - rs485-rts-active-low: drive RTS low when sending (default is high). - linux,rs485-enabled-at-boot-time: empty property telling to enable the rs485 feature at boot time. It can be disabled later with proper ioctl. diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 556f50aa1b58..4fb265b2c0fe 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -3097,6 +3097,17 @@ void uart_get_rs485_mode(struct device *dev, struct serial_rs485 *rs485conf) rs485conf->delay_rts_after_send = 0; } + ret = device_property_read_u32_array(dev, "rs485-rts-delay-us", + rs485_delay, 2); + if (!ret) { + rs485conf->delay_rts_before_send = rs485_delay[0]; + rs485conf->delay_rts_after_send = rs485_delay[1]; + rs485conf->flags |= SER_RS485_DELAY_IN_USEC; + } else { + rs485conf->delay_rts_before_send = 0; + rs485conf->delay_rts_after_send = 0; + } + /* * Clear full-duplex and enabled flags, set RTS polarity to active high * to get to a defined state with the following properties: -- 2.20.1 ------3DBD1F31B6509AA155215A088A5181A9 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; 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