From patchwork Fri Jul 17 14:08:27 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 497169 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 221D21409F8 for ; Sat, 18 Jul 2015 00:10:01 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754787AbbGQOJ6 (ORCPT ); Fri, 17 Jul 2015 10:09:58 -0400 Received: from sauhun.de ([89.238.76.85]:45242 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758032AbbGQOJP (ORCPT ); Fri, 17 Jul 2015 10:09:15 -0400 Received: from p4fe258cf.dip0.t-ipconnect.de ([79.226.88.207]:49571 helo=localhost) by pokefinder.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1ZG6K9-0006aY-Gy; Fri, 17 Jul 2015 16:09:13 +0200 From: Wolfram Sang To: linux-i2c@vger.kernel.org Cc: linux-sh@vger.kernel.org, Magnus Damm , Simon Horman , Laurent Pinchart , Geert Uytterhoeven , Wolfram Sang , Andrey Danin , linux-tegra@vger.kernel.org Subject: [RFC 7/9] i2c: apply DT flags when probing Date: Fri, 17 Jul 2015 16:08:27 +0200 Message-Id: <1437142109-31975-8-git-send-email-wsa@the-dreams.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1437142109-31975-1-git-send-email-wsa@the-dreams.de> References: <1437142109-31975-1-git-send-email-wsa@the-dreams.de> Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org From: Wolfram Sang Check for slave and 10-bit flags when probing and mark the client when found. Improve the address validity check, too Signed-off-by: Wolfram Sang --- drivers/i2c/i2c-core.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index b5719a2cff97bf..4a92eded4ece9c 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -27,6 +27,7 @@ I2C slave support (c) 2014 by Wolfram Sang */ +#include #include #include #include @@ -1283,7 +1284,8 @@ static struct i2c_client *of_i2c_register_device(struct i2c_adapter *adap, struct i2c_client *result; struct i2c_board_info info = {}; struct dev_archdata dev_ad = {}; - const __be32 *addr; + const __be32 *addr_be; + u32 addr; int len; dev_dbg(&adap->dev, "of_i2c: register %s\n", node->full_name); @@ -1294,20 +1296,31 @@ static struct i2c_client *of_i2c_register_device(struct i2c_adapter *adap, return ERR_PTR(-EINVAL); } - addr = of_get_property(node, "reg", &len); - if (!addr || (len < sizeof(*addr))) { + addr_be = of_get_property(node, "reg", &len); + if (!addr_be || (len < sizeof(*addr_be))) { dev_err(&adap->dev, "of_i2c: invalid reg on %s\n", node->full_name); return ERR_PTR(-EINVAL); } - info.addr = be32_to_cpup(addr); - if (info.addr > (1 << 10) - 1) { + addr = be32_to_cpup(addr_be); + if (addr & I2C_TEN_BIT_ADDRESS) { + addr &= ~I2C_TEN_BIT_ADDRESS; + info.flags |= I2C_CLIENT_TEN; + } + + if (addr & I2C_OWN_SLAVE_ADDRESS) { + addr &= ~I2C_OWN_SLAVE_ADDRESS; + info.flags |= I2C_CLIENT_SLAVE; + } + + if (i2c_check_addr_validity(addr, info.flags)) { dev_err(&adap->dev, "of_i2c: invalid addr=%x on %s\n", info.addr, node->full_name); return ERR_PTR(-EINVAL); } + info.addr = addr; info.of_node = of_node_get(node); info.archdata = &dev_ad;