From patchwork Wed Aug 13 10:46:25 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: nikesh@opensource.wolfsonmicro.com X-Patchwork-Id: 4717911 Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 521FD9F319 for ; Wed, 13 Aug 2014 10:46:59 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 46A39201CD for ; Wed, 13 Aug 2014 10:46:58 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id A74EC201B4 for ; Wed, 13 Aug 2014 10:46:55 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id E40EC265534; Wed, 13 Aug 2014 12:46:53 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (localhost [IPv6:::1]) by alsa0.perex.cz (Postfix) with ESMTP id C3B392654F3; Wed, 13 Aug 2014 12:46:42 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id EAF872654FC; Wed, 13 Aug 2014 12:46:41 +0200 (CEST) Received: from opensource.wolfsonmicro.com (opensource.wolfsonmicro.com [80.75.67.52]) by alsa0.perex.cz (Postfix) with ESMTP id EF6C52654EB for ; Wed, 13 Aug 2014 12:46:33 +0200 (CEST) Received: from nikesh-Latitude-E6410.wolfsonmicro.main (unknown [87.246.78.26]) by opensource.wolfsonmicro.com (Postfix) with ESMTPSA id 041A3110083; Wed, 13 Aug 2014 11:46:32 +0100 (BST) From: Nikesh Oswal To: broonie@kernel.org, lgirdwood@gmail.com Date: Wed, 13 Aug 2014 11:46:25 +0100 Message-Id: <1407926786-8528-1-git-send-email-nikesh@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.7.9.5 Cc: tiwai@suse.de, alsa-devel@alsa-project.org, patches@opensource.wolfsonmicro.com, linux-kernel@vger.kernel.org Subject: [alsa-devel] [PATCH] mfd: wm8994: declare dc servo register for wm8958 as volatile X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP DC Servo register 57h holds the DC offset value after the hardware has completed the DC Servo Correction, so declare this register as volatile because it is changed by the hardware. Signed-off-by: Nikesh Oswal --- drivers/mfd/wm8994-regmap.c | 1 + include/linux/mfd/wm8994/registers.h | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/mfd/wm8994-regmap.c b/drivers/mfd/wm8994-regmap.c index 2fbce9c..e775565 100644 --- a/drivers/mfd/wm8994-regmap.c +++ b/drivers/mfd/wm8994-regmap.c @@ -1169,6 +1169,7 @@ static bool wm8958_volatile_register(struct device *dev, unsigned int reg) case WM8958_FW_MINOR_0: case WM8958_FW_PATCH_1: case WM8958_FW_PATCH_0: + case WM8958_DC_SERVO: return true; default: return wm8994_volatile_register(dev, reg); diff --git a/include/linux/mfd/wm8994/registers.h b/include/linux/mfd/wm8994/registers.h index db8cef3..85b4fec 100644 --- a/include/linux/mfd/wm8994/registers.h +++ b/include/linux/mfd/wm8994/registers.h @@ -71,6 +71,7 @@ #define WM8994_DC_SERVO_1 0x54 #define WM8994_DC_SERVO_2 0x55 #define WM8994_DC_SERVO_4 0x57 +#define WM8958_DC_SERVO 0x57 #define WM8994_DC_SERVO_READBACK 0x58 #define WM8994_DC_SERVO_4E 0x59 #define WM8994_ANALOGUE_HP_1 0x60