From patchwork Sun Dec 20 20:31:48 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Maciej S. Szmigiero" X-Patchwork-Id: 7892531 Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id EEABFBEEE5 for ; Sun, 20 Dec 2015 20:32:15 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2085C203B4 for ; Sun, 20 Dec 2015 20:32:15 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id 392D92039D for ; Sun, 20 Dec 2015 20:32:14 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id 363A12610A7; Sun, 20 Dec 2015 21:32:13 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id C1E672607C8; Sun, 20 Dec 2015 21:32:05 +0100 (CET) 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 3BBD526084B; Sun, 20 Dec 2015 21:32:04 +0100 (CET) Received: from vps-vb.mhejs.net (vi37-28-154-113.vibiznes.pl [37.28.154.113]) by alsa0.perex.cz (Postfix) with ESMTP id 5F44A26073D for ; Sun, 20 Dec 2015 21:31:57 +0100 (CET) Received: by vps-vb.mhejs.net with esmtps (TLSv1:DHE-RSA-CAMELLIA256-SHA:256) (Exim 4.82) (envelope-from ) id 1aAke1-0003yw-Lj; Sun, 20 Dec 2015 21:31:53 +0100 Message-ID: <56771034.5080702@maciej.szmigiero.name> Date: Sun, 20 Dec 2015 21:31:48 +0100 From: "Maciej S. Szmigiero" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.0 MIME-Version: 1.0 To: "alsa-devel@alsa-project.org" Cc: Xiubo Li , linux-kernel , Liam Girdwood , Timur Tabi , Nicolin Chen , Mark Brown , Fabio Estevam , "linuxppc-dev@lists.ozlabs.org" Subject: [alsa-devel] [PATCH 2/3] ASoC: fsl_ssi: mark some registers precious 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: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP Mark some registers precious since their reads have side effects (like clearing flags). Signed-off-by: Maciej S. Szmigiero Reviewed-by: Fabio Estevam Acked-by: Timur Tabi --- sound/soc/fsl/fsl_ssi.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index cc22354d7758..40dfd8a36484 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -157,6 +157,21 @@ static bool fsl_ssi_volatile_reg(struct device *dev, unsigned int reg) } } +static bool fsl_ssi_precious_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case CCSR_SSI_SRX0: + case CCSR_SSI_SRX1: + case CCSR_SSI_SISR: + case CCSR_SSI_SACADD: + case CCSR_SSI_SACDAT: + case CCSR_SSI_SATAG: + return true; + default: + return false; + } +} + static bool fsl_ssi_writeable_reg(struct device *dev, unsigned int reg) { switch (reg) { @@ -179,6 +194,7 @@ static const struct regmap_config fsl_ssi_regconfig = { .num_reg_defaults = ARRAY_SIZE(fsl_ssi_reg_defaults), .readable_reg = fsl_ssi_readable_reg, .volatile_reg = fsl_ssi_volatile_reg, + .precious_reg = fsl_ssi_precious_reg, .writeable_reg = fsl_ssi_writeable_reg, .cache_type = REGCACHE_RBTREE, };