ASoC: codecs: wsa-macro: add runtime pm support

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220224111718.6264-12-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/lpass-wsa-macro.c b/sound/soc/codecs/lpass-wsa-macro.c
index 94b8e2c..27da6c6 100644 (file)
--- 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"
@@ -2468,6 +2469,12 @@ static int wsa_macro_probe(struct platform_device *pdev)
        if (ret)
                goto err_clkout;
 
+       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 0;
 
 err_clkout:
@@ -2498,6 +2505,59 @@ 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->mclk);
+       clk_disable_unprepare(wsa->npl);
+       clk_disable_unprepare(wsa->fsgen);
+
+       return 0;
+}
+
+static int __maybe_unused wsa_macro_runtime_resume(struct device *dev)
+{
+       struct wsa_macro *wsa = dev_get_drvdata(dev);
+       int ret;
+
+       ret = clk_prepare_enable(wsa->mclk);
+       if (ret) {
+               dev_err(dev, "unable to prepare mclk\n");
+               return ret;
+       }
+
+       ret = clk_prepare_enable(wsa->npl);
+       if (ret) {
+               dev_err(dev, "unable to prepare mclkx2\n");
+               goto err_npl;
+       }
+
+       ret = clk_prepare_enable(wsa->fsgen);
+       if (ret) {
+               dev_err(dev, "unable to prepare fsgen\n");
+               goto err_fsgen;
+       }
+
+       regcache_cache_only(wsa->regmap, false);
+       regcache_sync(wsa->regmap);
+
+       return 0;
+err_fsgen:
+       clk_disable_unprepare(wsa->npl);
+err_npl:
+       clk_disable_unprepare(wsa->mclk);
+
+       return ret;
+}
+
+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"},
@@ -2509,6 +2569,7 @@ 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,