From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751769Ab3LYEN2 (ORCPT ); Tue, 24 Dec 2013 23:13:28 -0500 Received: from co9ehsobe005.messaging.microsoft.com ([207.46.163.28]:47813 "EHLO co9outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751394Ab3LYEN1 (ORCPT ); Tue, 24 Dec 2013 23:13:27 -0500 X-Forefront-Antispam-Report: CIP:70.37.183.190;KIP:(null);UIP:(null);IPV:NLI;H:mail.freescale.net;RD:none;EFVD:NLI X-SpamScore: 0 X-BigFish: VS0(zzzz1f42h2148h208ch1ee6h1de0h1fdah2073h2146h1202h1e76h2189h1d1ah1d2ah1fc6hzz1de098h8275bh1de097hz2dh2a8h839he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1b2fh2222h224fh1fb3h1d0ch1d2eh1d3fh1dc1h1dfeh1dffh1e23h1fe8h1ff5h2218h2216h226dh22d0h2327h2336h1155h) From: Xiubo Li To: CC: , , , , , , , , Subject: [PATCH] ASoC: fsl_sai: Move the global registers setting to _dai_probe() Date: Wed, 25 Dec 2013 11:20:14 +0800 Message-ID: <1387941614-7629-1-git-send-email-Li.Xiubo@freescale.com> X-Mailer: git-send-email 1.8.0 MIME-Version: 1.0 Content-Type: text/plain X-OriginatorOrg: freescale.com X-FOPE-CONNECTOR: Id%0$Dn%*$RO%0$TLS%0$FQDN%$TlsDn% X-FOPE-CONNECTOR: Id%0$Dn%FREESCALE.MAIL.ONMICROSOFT.COM$RO%1$TLS%0$FQDN%$TlsDn% Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Because we cannot make sure which one of _dai_fmt() and _dai_sysclk() will be firstly called. So move the RCSR/TCSR and TCR1/RCR1's initialization to _dai_probe(), and this can make sure that before any of {T,R}CR{1~5} register to be set the RCSR/TCSR's RE/TE bit has been cleared for the hareware limitation. Signed-off-by: Xiubo Li --- sound/soc/fsl/fsl_sai.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c index b72132f..596aabb 100644 --- a/sound/soc/fsl/fsl_sai.c +++ b/sound/soc/fsl/fsl_sai.c @@ -100,11 +100,6 @@ static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai, if (ret) return ret; - sai_writel(sai, 0x0, sai->base + FSL_SAI_RCSR); - sai_writel(sai, 0x0, sai->base + FSL_SAI_TCSR); - sai_writel(sai, FSL_SAI_MAXBURST_TX * 2, sai->base + FSL_SAI_TCR1); - sai_writel(sai, FSL_SAI_MAXBURST_RX - 1, sai->base + FSL_SAI_RCR1); - ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, FSL_FMT_TRANSMITTER); if (ret) { @@ -351,6 +346,18 @@ static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = { static int fsl_sai_dai_probe(struct snd_soc_dai *cpu_dai) { struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev); + int ret; + + ret = clk_prepare_enable(sai->clk); + if (ret) + return ret; + + sai_writel(sai, 0x0, sai->base + FSL_SAI_RCSR); + sai_writel(sai, 0x0, sai->base + FSL_SAI_TCSR); + sai_writel(sai, FSL_SAI_MAXBURST_TX * 2, sai->base + FSL_SAI_TCR1); + sai_writel(sai, FSL_SAI_MAXBURST_RX - 1, sai->base + FSL_SAI_RCR1); + + clk_disable_unprepare(sai->clk); snd_soc_dai_init_dma_data(cpu_dai, &sai->dma_params_tx, &sai->dma_params_rx); -- 1.8.4