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.
Tested-by: NKenneth Westfield <kwestfie@codeaurora.org>
Acked-by: NKenneth Westfield <kwestfie@codeaurora.org>
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

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 +50,23 @@ 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 +79,9 @@ 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,
@@ -412,11 +422,10 @@ int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
 		drvdata->mi2s_osr_clk[dai_id] = devm_clk_get(&pdev->dev,
 								clk_name);
 		if (IS_ERR(drvdata->mi2s_osr_clk[dai_id])) {
-			dev_err(&pdev->dev,
+			dev_warn(&pdev->dev,
 				"%s() error getting mi2s-osr-clk: %ld\n",
 				__func__,
 				PTR_ERR(drvdata->mi2s_osr_clk[dai_id]));
-			return PTR_ERR(drvdata->mi2s_osr_clk[dai_id]);
 		}
 
 		if (variant->num_dai > 1)