From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753377AbaEHH4t (ORCPT ); Thu, 8 May 2014 03:56:49 -0400 Received: from smtp39.i.mail.ru ([94.100.177.99]:41411 "EHLO smtp39.i.mail.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752932AbaEHH4q (ORCPT ); Thu, 8 May 2014 03:56:46 -0400 From: Alexander Shiyan To: linux-kernel@vger.kernel.org Cc: Evgeniy Polyakov , Sascha Hauer , Shawn Guo , Alexander Shiyan Subject: [PATCH 3/4] w1: mxc_w1: Perform a software reset at startup Date: Thu, 8 May 2014 11:56:39 +0400 Message-Id: <1399535800-19335-3-git-send-email-shc_work@mail.ru> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1399535800-19335-1-git-send-email-shc_work@mail.ru> References: <1399535800-19335-1-git-send-email-shc_work@mail.ru> X-Spam: Not detected X-Mras: Ok Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds a software reset for 1-Wire module at driver startup. Signed-off-by: Alexander Shiyan --- drivers/w1/masters/mxc_w1.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/w1/masters/mxc_w1.c b/drivers/w1/masters/mxc_w1.c index 0d05abe..741d2bb4 100644 --- a/drivers/w1/masters/mxc_w1.c +++ b/drivers/w1/masters/mxc_w1.c @@ -32,6 +32,7 @@ # define MXC_W1_CONTROL_RPP BIT(7) #define MXC_W1_TIME_DIVIDER 0x02 #define MXC_W1_RESET 0x04 +# define MXC_W1_RESET_RST BIT(0) struct mxc_w1_device { void __iomem *regs; @@ -129,6 +130,10 @@ static int mxc_w1_probe(struct platform_device *pdev) if (err) return err; + /* Software reset 1-Wire module */ + writeb(MXC_W1_RESET_RST, mdev->regs + MXC_W1_RESET); + writeb(0, mdev->regs + MXC_W1_RESET); + writeb(clkdiv - 1, mdev->regs + MXC_W1_TIME_DIVIDER); mdev->bus_master.data = mdev; -- 1.8.3.2