Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753320Ab0LCPhX (ORCPT ); Fri, 3 Dec 2010 10:37:23 -0500 Received: from eu1sys200aog115.obsmtp.com ([207.126.144.139]:56775 "EHLO eu1sys200aog115.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752747Ab0LCPhN (ORCPT ); Fri, 3 Dec 2010 10:37:13 -0500 From: Sundar Iyer To: , , , Cc: , , Sundar Iyer Subject: [PATCH 12/20] mfd/tc3589x: undo gpio module reset during chip init Date: Fri, 3 Dec 2010 20:35:45 +0530 Message-ID: <1291388753-14662-13-git-send-email-sundar.iyer@stericsson.com> X-Mailer: git-send-email 1.7.2.dirty In-Reply-To: <1291388753-14662-1-git-send-email-sundar.iyer@stericsson.com> References: <1291388753-14662-1-git-send-email-sundar.iyer@stericsson.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1318 Lines: 39 Skip putting the GPIO module into a reset during the chip init. This makes sure to preserve any existing GPIO configurations done by pre-kernel boot code. Signed-off-by: Sundar Iyer --- drivers/mfd/tc3589x.c | 9 ++++++--- 1 files changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c index e173f33..fd206fd 100644 --- a/drivers/mfd/tc3589x.c +++ b/drivers/mfd/tc3589x.c @@ -247,12 +247,15 @@ static int tc3589x_chip_init(struct tc3589x *tc3589x) dev_info(tc3589x->dev, "manufacturer: %#x, version: %#x\n", manf, ver); - /* Put everything except the IRQ module into reset */ + /* + * Put everything except the IRQ module into reset; + * also spare the GPIO module for any pin initialization + * done during pre-kernel boot + */ ret = tc3589x_reg_write(tc3589x, TC3589x_RSTCTRL, TC3589x_RSTCTRL_TIMRST | TC3589x_RSTCTRL_ROTRST - | TC3589x_RSTCTRL_KBDRST - | TC3589x_RSTCTRL_GPIRST); + | TC3589x_RSTCTRL_KBDRST); if (ret < 0) return ret; -- 1.7.2.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/