linux-kernel - [PATCH v1 06/13] ASoC: qcom: make osr clock optional

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Date:	Wed, 13 May 2015 13:02:27 +0100
From:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:	Patrick Lai <plai@...eaurora.org>, Mark Brown <broonie@...nel.org>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Banajit Goswami <bgoswami@...eaurora.org>,
	Kenneth Westfield <kwestfie@...eaurora.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org, linux-arm-msm@...r.kernel.org,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH v1 06/13] ASoC: qcom: make osr clock optional

Some LPASS integrations like on APQ8016 do not have OSR clk, so making
osr clk optional would allow such integrations to use lpass driver.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 sound/soc/qcom/lpass-cpu.c | 33 ++++++++++++++++++++++-----------
 1 file changed, 22 insertions(+), 11 deletions(-)

diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
index 0d28ea7..33e28370 100644
--- a/sound/soc/qcom/lpass-cpu.c
+++ b/sound/soc/qcom/lpass-cpu.c
@@ -33,6 +33,9 @@ static int lpass_cpu_daiops_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 	struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
 	int ret;
 
+	if (IS_ERR(drvdata->mi2s_osr_clk[dai->driver->id]))
+		return 0;
+
 	ret = clk_set_rate(drvdata->mi2s_osr_clk[dai->driver->id], freq);
 	if (ret)
 		dev_err(dai->dev, "%s() error setting mi2s osrclk to %u: %d\n",
@@ -47,18 +50,22 @@ static int lpass_cpu_daiops_startup(struct snd_pcm_substream *substream,
 	struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
 	int ret;
 
-	ret = clk_prepare_enable(drvdata->mi2s_osr_clk[dai->diver->id]);
-	if (ret) {
-		dev_err(dai->dev, "%s() error in enabling mi2s osr clk: %d\n",
-				__func__, ret);
-		return ret;
+	if (!IS_ERR(drvdata->mi2s_osr_clk[dai->driver->id])) {
+		ret = clk_prepare_enable(
+				drvdata->mi2s_osr_clk[dai->driver->id]);
+		if (ret) {
+			dev_err(dai->dev, "%s() error in enabling mi2s osr clk: %d\n",
+					__func__, ret);
+			return ret;
+		}
 	}
 
 	ret = clk_prepare_enable(drvdata->mi2s_bit_clk[dai->driver->id]);
 	if (ret) {
 		dev_err(dai->dev, "%s() error in enabling mi2s bit clk: %d\n",
 				__func__, ret);
-		clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
+		if (!IS_ERR(drvdata->mi2s_osr_clk[dai->driver->id]))
+			clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
 		return ret;
 	}
 
@@ -71,7 +78,9 @@ static void lpass_cpu_daiops_shutdown(struct snd_pcm_substream *substream,
 	struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
 
 	clk_disable_unprepare(drvdata->mi2s_bit_clk[dai->driver->id]);
-	clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
+
+	if (!IS_ERR(drvdata->mi2s_osr_clk[dai->driver->id]))
+		clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
 }
 
 static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
@@ -408,11 +417,13 @@ int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
 		else
 			sprintf(clk_name, "mi2s-osr-clk");
 
-		drvdata->mi2s_osr_clk[i] = devm_clk_get(&pdev->dev, clk_name);
+		drvdata->mi2s_osr_clk[i] = devm_clk_get(&pdev->dev,
+								clk_name);
 		if (IS_ERR(drvdata->mi2s_osr_clk[i])) {
-			dev_err(&pdev->dev, "%s() error getting mi2s-osr-clk: %ld\n",
-				__func__, PTR_ERR(drvdata->mi2s_osr_clk[i]));
-			return PTR_ERR(drvdata->mi2s_osr_clk[i]);
+			dev_err(&pdev->dev,
+				"%s() error getting mi2s-osr-clk: %ld\n",
+				__func__,
+				PTR_ERR(drvdata->mi2s_osr_clk[i]));
 		}
 	}
 
-- 
1.9.1

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