Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752950AbbBSTTf (ORCPT ); Thu, 19 Feb 2015 14:19:35 -0500 Received: from cantor2.suse.de ([195.135.220.15]:42819 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751939AbbBSTTd (ORCPT ); Thu, 19 Feb 2015 14:19:33 -0500 From: =?UTF-8?q?Andreas=20F=C3=A4rber?= To: Sangbeom Kim , alsa-devel@alsa-project.org, linux-samsung-soc@vger.kernel.org Cc: Liam Girdwood , Mark Brown , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Vincent Palatin , Doug Anderson , Javier Martinez Canillas , Tomasz Figa , =?UTF-8?q?Andreas=20F=C3=A4rber?= , Tushar Behera , Jaroslav Kysela , Takashi Iwai , Lars-Peter Clausen , Xiubo Li Subject: [PATCH] ASoC: max98088: Add master clock handling Date: Thu, 19 Feb 2015 20:18:41 +0100 Message-Id: <1424373526-4135-1-git-send-email-afaerber@suse.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1424283959-16289-3-git-send-email-afaerber@suse.de> References: <1424283959-16289-3-git-send-email-afaerber@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2691 Lines: 80 If master clock is provided through device tree, then update the master clock frequency during set_sysclk. Cc: Tushar Behera Signed-off-by: Andreas Färber --- sound/soc/codecs/max98088.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/sound/soc/codecs/max98088.c b/sound/soc/codecs/max98088.c index 69a21d1946e3..1aa81321afba 100644 --- a/sound/soc/codecs/max98088.c +++ b/sound/soc/codecs/max98088.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -42,6 +43,7 @@ struct max98088_priv { struct regmap *regmap; enum max98088_type devtype; struct max98088_pdata *pdata; + struct clk *mclk; unsigned int sysclk; struct max98088_cdata dai[2]; int eq_textcnt; @@ -1361,6 +1363,11 @@ static int max98088_dai_set_sysclk(struct snd_soc_dai *dai, if (freq == max98088->sysclk) return 0; + if (!IS_ERR(max98088->mclk)) { + freq = clk_round_rate(max98088->mclk, freq); + clk_set_rate(max98088->mclk, freq); + } + /* Setup clocks for slave mode, and using the PLL * PSCLK = 0x01 (when master clk is 10MHz to 20MHz) * 0x02 (when master clk is 20MHz to 30MHz).. @@ -1568,6 +1575,19 @@ static int max98088_set_bias_level(struct snd_soc_codec *codec, break; case SND_SOC_BIAS_PREPARE: + /* + * SND_SOC_BIAS_PREPARE is called while preparing for a + * transition to ON or away from ON. If current bias_level + * is SND_SOC_BIAS_ON, then it is preparing for a transition + * away from ON. Disable the clock in that case, otherwise + * enable it. + */ + if (!IS_ERR(max98088->mclk)) { + if (codec->dapm.bias_level == SND_SOC_BIAS_ON) + clk_disable_unprepare(max98088->mclk); + else + clk_prepare_enable(max98088->mclk); + } break; case SND_SOC_BIAS_STANDBY: @@ -1900,6 +1920,10 @@ static int max98088_probe(struct snd_soc_codec *codec) max98088->sysclk = (unsigned)-1; max98088->eq_textcnt = 0; + max98088->mclk = devm_clk_get(codec->dev, "mclk"); + if (PTR_ERR(max98088->mclk) == -EPROBE_DEFER) + return -EPROBE_DEFER; + cdata = &max98088->dai[0]; cdata->rate = (unsigned)-1; cdata->fmt = (unsigned)-1; -- 2.1.4 -- 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/