linux-kernel - [PATCH 04/10] ASoC: codecs: tx-macro: add runtime pm support

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Date:   Mon, 21 Feb 2022 13:10:31 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     broonie@...nel.org
Cc:     lgirdwood@...il.com, perex@...ex.cz, tiwai@...e.com,
        pierre-louis.bossart@...ux.intel.com, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, quic_srivasam@...cinc.com,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH 04/10] ASoC: codecs: tx-macro: add runtime pm support

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 sound/soc/codecs/lpass-tx-macro.c | 41 +++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/sound/soc/codecs/lpass-tx-macro.c b/sound/soc/codecs/lpass-tx-macro.c
index 7347d79a6329..1c0f0d27ed42 100644
--- a/sound/soc/codecs/lpass-tx-macro.c
+++ b/sound/soc/codecs/lpass-tx-macro.c
@@ -6,6 +6,7 @@
 #include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 #include <sound/soc.h>
 #include <sound/soc-dapm.h>
@@ -1844,6 +1845,13 @@ static int tx_macro_probe(struct platform_device *pdev)
 					      ARRAY_SIZE(tx_macro_dai));
 	if (ret)
 		goto err;
+
+	pm_runtime_set_autosuspend_delay(dev, 3000);
+	pm_runtime_use_autosuspend(dev);
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+
 	return ret;
 err:
 	clk_bulk_disable_unprepare(TX_NUM_CLKS_MAX, tx->clks);
@@ -1862,6 +1870,38 @@ static int tx_macro_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static int __maybe_unused tx_macro_runtime_suspend(struct device *dev)
+{
+	struct tx_macro *tx = dev_get_drvdata(dev);
+
+	regcache_cache_only(tx->regmap, true);
+	regcache_mark_dirty(tx->regmap);
+
+	clk_disable_unprepare(tx->clks[2].clk);
+	clk_disable_unprepare(tx->clks[3].clk);
+	clk_disable_unprepare(tx->clks[4].clk);
+
+	return 0;
+}
+
+static int __maybe_unused tx_macro_runtime_resume(struct device *dev)
+{
+	struct tx_macro *tx = dev_get_drvdata(dev);
+
+	clk_prepare_enable(tx->clks[2].clk);
+	clk_prepare_enable(tx->clks[3].clk);
+	clk_prepare_enable(tx->clks[4].clk);
+	regcache_cache_only(tx->regmap, false);
+	regcache_sync(tx->regmap);
+	tx->reset_swr = true;
+
+	return 0;
+}
+
+static const struct dev_pm_ops tx_macro_pm_ops = {
+	SET_RUNTIME_PM_OPS(tx_macro_runtime_suspend, tx_macro_runtime_resume, NULL)
+};
+
 static const struct of_device_id tx_macro_dt_match[] = {
 	{ .compatible = "qcom,sc7280-lpass-tx-macro" },
 	{ .compatible = "qcom,sm8250-lpass-tx-macro" },
@@ -1873,6 +1913,7 @@ static struct platform_driver tx_macro_driver = {
 		.name = "tx_macro",
 		.of_match_table = tx_macro_dt_match,
 		.suppress_bind_attrs = true,
+		.pm = &tx_macro_pm_ops,
 	},
 	.probe = tx_macro_probe,
 	.remove = tx_macro_remove,
-- 
2.21.0