From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from vps-vb.mhejs.net (vi37-28-154-113.vibiznes.pl [37.28.154.113]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 80D6D1A15E8 for ; Mon, 21 Dec 2015 08:00:01 +1100 (AEDT) Message-ID: <56771034.5080702@maciej.szmigiero.name> Date: Sun, 20 Dec 2015 21:31:48 +0100 From: "Maciej S. Szmigiero" MIME-Version: 1.0 To: "alsa-devel@alsa-project.org" CC: Timur Tabi , Nicolin Chen , Xiubo Li , Liam Girdwood , Mark Brown , "linuxppc-dev@lists.ozlabs.org" , linux-kernel , Fabio Estevam Subject: [PATCH 2/3] ASoC: fsl_ssi: mark some registers precious Content-Type: text/plain; charset=UTF-8 List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Mark some registers precious since their reads have side effects (like clearing flags). Signed-off-by: Maciej S. Szmigiero --- 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, };