From patchwork Tue Jan 20 12:22:25 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 431038 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id ED5971402CE for ; Tue, 20 Jan 2015 23:25:05 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753757AbbATMYq (ORCPT ); Tue, 20 Jan 2015 07:24:46 -0500 Received: from mail-lb0-f176.google.com ([209.85.217.176]:44146 "EHLO mail-lb0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753714AbbATMYp (ORCPT ); Tue, 20 Jan 2015 07:24:45 -0500 Received: by mail-lb0-f176.google.com with SMTP id z12so12494308lbi.7; Tue, 20 Jan 2015 04:24:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id; bh=DLiYPKF/EHb4+6TSf4mqJFTWiOdbCL8qKCrGcYFtEg4=; b=sE+37Tn8gkvyCwZWFklVl1lTElJt3LrKKAeR5Q9jMWL/PTtkgrMKG4z5RNQyU/QbTp 1jQDQXgXNEXpc2yMOf8RKQxw4IKoMtDiQO6vB09x8RYPUramwhcjT4ligfMm+X7cgocU c4WuJKkFJqjnMJQgLTERJDPuQCgObdx/xK8RyFFVQyXeW4rcEyqvoFpmRwp5l1Y9FMO1 zuJLieHPK0LBJfRp29zK/x4b9Tt25yrF6x0BX77Nw1hFcDyziQXNhJgWierbVpCuNvd2 JBsG+to1UdbKpUHxSDajXqadfw9r/sm+WKGOAJjWjIdfqoR9WGcoD7gPBb22bG1Z/SxK M5QQ== X-Received: by 10.112.205.231 with SMTP id lj7mr34303080lbc.86.1421756683257; Tue, 20 Jan 2015 04:24:43 -0800 (PST) Received: from localhost.localdomain (ppp95-165-114-106.pppoe.spdop.ru. [95.165.114.106]) by mx.google.com with ESMTPSA id z6sm3983794lby.7.2015.01.20.04.24.40 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 20 Jan 2015 04:24:42 -0800 (PST) From: Dmitry Osipenko To: digetx@gmail.com, Wolfram Sang , Stephen Warren , Thierry Reding , Alexandre Courbot , Laxman Dewangan Cc: Ben Dooks , Bob Mottram , linux-tegra@vger.kernel.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] i2c: tegra: Maintain CPU endianness Date: Tue, 20 Jan 2015 15:22:25 +0300 Message-Id: <1421756555-20266-1-git-send-email-digetx@gmail.com> X-Mailer: git-send-email 2.2.1 Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Support CPU BE mode by adding endianness conversion for memcpy interactions. Signed-off-by: Dmitry Osipenko --- drivers/i2c/busses/i2c-tegra.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 28b87e6..e0d3ef1 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -286,6 +286,7 @@ static int tegra_i2c_empty_rx_fifo(struct tegra_i2c_dev *i2c_dev) if (rx_fifo_avail > 0 && buf_remaining > 0) { BUG_ON(buf_remaining > 3); val = i2c_readl(i2c_dev, I2C_RX_FIFO); + val = cpu_to_le32(val); memcpy(buf, &val, buf_remaining); buf_remaining = 0; rx_fifo_avail--; @@ -343,7 +344,9 @@ static int tegra_i2c_fill_tx_fifo(struct tegra_i2c_dev *i2c_dev) */ if (tx_fifo_avail > 0 && buf_remaining > 0) { BUG_ON(buf_remaining > 3); + val = 0; memcpy(&val, buf, buf_remaining); + val = cpu_to_le32(val); /* Again update before writing to FIFO to make sure isr sees. */ i2c_dev->msg_buf_remaining = 0;