ASoC: sun8i-codec: Attach the bus clock to the regmap

When attached to the regmap, the bus clock is automatically enabled as
needed to access device registers. This avoids needing code to manage it
separately in the driver.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20200831034852.18841-9-samuel@sholland.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sunxi/sun8i-codec.c

@@ -94,7 +94,6 @@ struct sun8i_codec_quirks {
 struct sun8i_codec {
 	struct regmap			*regmap;
 	struct clk			*clk_module;
-	struct clk			*clk_bus;
 	const struct sun8i_codec_quirks	*quirks;
 };
 
@@ -109,12 +108,6 @@ static int sun8i_codec_runtime_resume(struct device *dev)
 		return ret;
 	}
 
-	ret = clk_prepare_enable(scodec->clk_bus);
-	if (ret) {
-		dev_err(dev, "Failed to enable the bus clock\n");
-		goto err_disable_modclk;
-	}
-
 	regcache_cache_only(scodec->regmap, false);
 
 	ret = regcache_sync(scodec->regmap);
@@ -126,9 +119,6 @@ static int sun8i_codec_runtime_resume(struct device *dev)
 	return 0;
 
 err_disable_clk:
-	clk_disable_unprepare(scodec->clk_bus);
-
-err_disable_modclk:
 	clk_disable_unprepare(scodec->clk_module);
 
 	return ret;
@@ -142,7 +132,6 @@ static int sun8i_codec_runtime_suspend(struct device *dev)
 	regcache_mark_dirty(scodec->regmap);
 
 	clk_disable_unprepare(scodec->clk_module);
-	clk_disable_unprepare(scodec->clk_bus);
 
 	return 0;
 }
@@ -612,20 +601,14 @@ static int sun8i_codec_probe(struct platform_device *pdev)
 		return PTR_ERR(scodec->clk_module);
 	}
 
-	scodec->clk_bus = devm_clk_get(&pdev->dev, "bus");
-	if (IS_ERR(scodec->clk_bus)) {
-		dev_err(&pdev->dev, "Failed to get the bus clock\n");
-		return PTR_ERR(scodec->clk_bus);
-	}
-
 	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base)) {
 		dev_err(&pdev->dev, "Failed to map the registers\n");
 		return PTR_ERR(base);
 	}
 
-	scodec->regmap = devm_regmap_init_mmio(&pdev->dev, base,
-					       &sun8i_codec_regmap_config);
+	scodec->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "bus", base,
+						   &sun8i_codec_regmap_config);
 	if (IS_ERR(scodec->regmap)) {
 		dev_err(&pdev->dev, "Failed to create our regmap\n");
 		return PTR_ERR(scodec->regmap);