From patchwork Mon Jun 26 09:07:56 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= X-Patchwork-Id: 780626 Return-Path: X-Original-To: incoming-imx@patchwork.ozlabs.org Delivered-To: patchwork-incoming-imx@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3wx3CW0CQkz9s65 for ; Mon, 26 Jun 2017 19:09:27 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="WE1hVX2a"; dkim-atps=neutral DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Ii7Sb+Gdr/gC3fbhsBT1bplVrDANFp9VlJDo6WwaLqM=; b=WE1hVX2avJiu0z eu1Uly+q5dT3FFiDKyUFD4mn+Dk+QJGwFzhfiDfdFAY0RzSsoBIZJleQSBY2QnpcGMv4wyKIBL1Ck Z/hEO/Bnl09xufamsaxDK13exm+3IHM8/pGgotnYsVDor47kwGqTMZ9gIaVhAqDwQEYx3DQMUaPe3 a0yAM6J5bRwk038lTjzhvU/chExOaQogoumr0qSL0ZKp5c/KzcyqzCPH/XvMbSHO49ESWHg+lS8T6 YUdGC8og5FS/wbjIREauJ0MAABh7yILbtFJh7Fabq0599nkFjRNpRHsShL6Hz2duJRHR9YvxdQpyA J7/i0dDWelh8tRNPMF7w==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dPQ1M-0004nE-EK; Mon, 26 Jun 2017 09:09:24 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dPQ0e-0003t2-Gq for linux-arm-kernel@lists.infradead.org; Mon, 26 Jun 2017 09:08:42 +0000 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1dPQ0G-0005tE-7N; Mon, 26 Jun 2017 11:08:16 +0200 Received: from ukl by dude.hi.pengutronix.de with local (Exim 4.89) (envelope-from ) id 1dPQ0F-0004wU-ST; Mon, 26 Jun 2017 11:08:15 +0200 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= To: linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 2/9] dt-bindings: serial/rs485: make rs485-rts-delay optional Date: Mon, 26 Jun 2017 11:07:56 +0200 Message-Id: <20170626090803.10981-3-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170626090803.10981-1-u.kleine-koenig@pengutronix.de> References: <20170626090803.10981-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170626_020840_792171_CBD9BB10 X-CRM114-Status: GOOD ( 11.50 ) X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, kernel@pengutronix.de Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org List-Id: linux-imx-kernel.lists.patchwork.ozlabs.org There are a few device trees that specify one of the already optional properties without also having the up to now required property rs485-rts-delay. Additionally there is no technical reason to require rs485-rts-delay and that's also what most drivers implement. So give existing users and implementers a blessing and document rs485-rts-delay as optional. Signed-off-by: Uwe Kleine-König Acked-by: Rob Herring --- Documentation/devicetree/bindings/serial/rs485.txt | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/serial/rs485.txt b/Documentation/devicetree/bindings/serial/rs485.txt index 32b1fa1f2a5b..b8415936dfdb 100644 --- a/Documentation/devicetree/bindings/serial/rs485.txt +++ b/Documentation/devicetree/bindings/serial/rs485.txt @@ -5,14 +5,13 @@ the built-in half-duplex mode. The properties described hereafter shall be given to a half-duplex capable UART node. -Required properties: +Optional properties: - rs485-rts-delay: prop-encoded-array where: * a is the delay between rts signal and beginning of data sent in milliseconds. it corresponds to the delay before sending data. * 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. - -Optional properties: + If this property is not specified, <0 0> is assumed. - 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. - rs485-rx-during-tx: empty property that enables the receiving of data even