From patchwork Wed Sep 30 08:47:11 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ludovic Desroches X-Patchwork-Id: 7293641 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 49EC8BEEA4 for ; Wed, 30 Sep 2015 08:50:28 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7FF7320668 for ; Wed, 30 Sep 2015 08:50:27 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B587720664 for ; Wed, 30 Sep 2015 08:50:26 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZhD4I-0002Xm-HP; Wed, 30 Sep 2015 08:48:54 +0000 Received: from eusmtp01.atmel.com ([212.144.249.242]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZhD2n-0001pg-S1 for linux-arm-kernel@lists.infradead.org; Wed, 30 Sep 2015 08:47:22 +0000 Received: from ibiza.corp.atmel.com (10.161.101.13) by eusmtp01.atmel.com (10.161.101.30) with Microsoft SMTP Server id 14.3.235.1; Wed, 30 Sep 2015 10:47:17 +0200 From: Ludovic Desroches To: Subject: [PATCH 2/2] i2c: at91: update documentation for new "atmel, twd-hold-cycles" property Date: Wed, 30 Sep 2015 10:47:11 +0200 Message-ID: <1443602831-27069-2-git-send-email-ludovic.desroches@atmel.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1443602831-27069-1-git-send-email-ludovic.desroches@atmel.com> References: <1443602831-27069-1-git-send-email-ludovic.desroches@atmel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150930_014722_108103_100B2BE0 X-CRM114-Status: UNSURE ( 8.09 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -4.2 (----) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, nicolas.ferre@atmel.com, linux-kernel@vger.kernel.org, Wenyou Yang , Ludovic Desroches , linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Wenyou Yang Add a DT property "atmel,twd-hold-cycles" to specify the HOLD field of TWIHS_CWGR register to increase the TWD hold time. Signed-off-by: Wenyou Yang Signed-off-by: Ludovic Desroches --- Documentation/devicetree/bindings/i2c/i2c-at91.txt | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/i2c-at91.txt b/Documentation/devicetree/bindings/i2c/i2c-at91.txt index 6e81dc1..f14c0b2 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-at91.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-at91.txt @@ -17,6 +17,8 @@ Optional properties: - dma-names: should contain "tx" and "rx". - atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO capable I2C controllers. +- atmel,twd-hold-cycles: increase the TWD hold time by + (atmel,twd-hold-cycles + 3) x t_periperal_clk, maximum value is 0x1f. - Child nodes conforming to i2c bus binding Examples : @@ -29,6 +31,7 @@ i2c0: i2c@fff84000 { #size-cells = <0>; clocks = <&twi0_clk>; clock-frequency = <400000>; + atmel,twd-hold-cycles = <2>; 24c512@50 { compatible = "24c512";