linux-kernel - [PATCH 02/10] ASoC: codecs: wsa-macro: add runtime pm support

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Message-Id: <20220221131037.8809-3-srinivas.kandagatla@linaro.org>
Date:   Mon, 21 Feb 2022 13:10:29 +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 02/10] ASoC: codecs: wsa-macro: add runtime pm support

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 sound/soc/codecs/lpass-wsa-macro.c | 39 ++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/sound/soc/codecs/lpass-wsa-macro.c b/sound/soc/codecs/lpass-wsa-macro.c
index 21a4b8cc4a0a..a8d30f3b3fdf 100644
--- a/sound/soc/codecs/lpass-wsa-macro.c
+++ b/sound/soc/codecs/lpass-wsa-macro.c
@@ -10,6 +10,7 @@
 #include <linux/clk-provider.h>
 #include <sound/soc.h>
 #include <sound/soc-dapm.h>
+#include <linux/pm_runtime.h>
 #include <linux/of_platform.h>
 #include <sound/tlv.h>
 #include "lpass-wsa-macro.h"
@@ -2429,6 +2430,12 @@ static int wsa_macro_probe(struct platform_device *pdev)
 	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(WSA_NUM_CLKS_MAX, wsa->clks);
@@ -2446,6 +2453,37 @@ static int wsa_macro_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static int __maybe_unused wsa_macro_runtime_suspend(struct device *dev)
+{
+	struct wsa_macro *wsa = dev_get_drvdata(dev);
+
+	regcache_cache_only(wsa->regmap, true);
+	regcache_mark_dirty(wsa->regmap);
+
+	clk_disable_unprepare(wsa->clks[2].clk);
+	clk_disable_unprepare(wsa->clks[3].clk);
+	clk_disable_unprepare(wsa->clks[4].clk);
+
+	return 0;
+}
+
+static int __maybe_unused wsa_macro_runtime_resume(struct device *dev)
+{
+	struct wsa_macro *wsa = dev_get_drvdata(dev);
+
+	clk_prepare_enable(wsa->clks[2].clk);
+	clk_prepare_enable(wsa->clks[3].clk);
+	clk_prepare_enable(wsa->clks[4].clk);
+	regcache_cache_only(wsa->regmap, false);
+	regcache_sync(wsa->regmap);
+
+	return 0;
+}
+
+static const struct dev_pm_ops wsa_macro_pm_ops = {
+	SET_RUNTIME_PM_OPS(wsa_macro_runtime_suspend, wsa_macro_runtime_resume, NULL)
+};
+
 static const struct of_device_id wsa_macro_dt_match[] = {
 	{.compatible = "qcom,sc7280-lpass-wsa-macro"},
 	{.compatible = "qcom,sm8250-lpass-wsa-macro"},
@@ -2457,6 +2495,7 @@ static struct platform_driver wsa_macro_driver = {
 	.driver = {
 		.name = "wsa_macro",
 		.of_match_table = wsa_macro_dt_match,
+		.pm = &wsa_macro_pm_ops,
 	},
 	.probe = wsa_macro_probe,
 	.remove = wsa_macro_remove,
-- 
2.21.0