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    Subject[PATCH v2 12/16] ASoC: codecs: rx-macro: add runtime pm support
    Date
    Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
    ---
    sound/soc/codecs/lpass-rx-macro.c | 62 +++++++++++++++++++++++++++++++
    1 file changed, 62 insertions(+)

    diff --git a/sound/soc/codecs/lpass-rx-macro.c b/sound/soc/codecs/lpass-rx-macro.c
    index a2f49a21678b..67bec5befc02 100644
    --- a/sound/soc/codecs/lpass-rx-macro.c
    +++ b/sound/soc/codecs/lpass-rx-macro.c
    @@ -5,6 +5,7 @@
    #include <linux/init.h>
    #include <linux/io.h>
    #include <linux/platform_device.h>
    +#include <linux/pm_runtime.h>
    #include <linux/clk.h>
    #include <sound/soc.h>
    #include <sound/pcm.h>
    @@ -3605,6 +3606,13 @@ static int rx_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:
    @@ -3641,11 +3649,65 @@ static const struct of_device_id rx_macro_dt_match[] = {
    };
    MODULE_DEVICE_TABLE(of, rx_macro_dt_match);

    +static int __maybe_unused rx_macro_runtime_suspend(struct device *dev)
    +{
    + struct rx_macro *rx = dev_get_drvdata(dev);
    +
    + regcache_cache_only(rx->regmap, true);
    + regcache_mark_dirty(rx->regmap);
    +
    + clk_disable_unprepare(rx->mclk);
    + clk_disable_unprepare(rx->npl);
    + clk_disable_unprepare(rx->fsgen);
    +
    + return 0;
    +}
    +
    +static int __maybe_unused rx_macro_runtime_resume(struct device *dev)
    +{
    + struct rx_macro *rx = dev_get_drvdata(dev);
    + int ret;
    +
    + ret = clk_prepare_enable(rx->mclk);
    + if (ret) {
    + dev_err(dev, "unable to prepare mclk\n");
    + return ret;
    + }
    +
    + ret = clk_prepare_enable(rx->npl);
    + if (ret) {
    + dev_err(dev, "unable to prepare mclkx2\n");
    + goto err_npl;
    + }
    +
    + ret = clk_prepare_enable(rx->fsgen);
    + if (ret) {
    + dev_err(dev, "unable to prepare fsgen\n");
    + goto err_fsgen;
    + }
    + regcache_cache_only(rx->regmap, false);
    + regcache_sync(rx->regmap);
    + rx->reset_swr = true;
    +
    + return 0;
    +err_fsgen:
    + clk_disable_unprepare(rx->npl);
    +err_npl:
    + clk_disable_unprepare(rx->mclk);
    +
    + return ret;
    +}
    +
    +static const struct dev_pm_ops rx_macro_pm_ops = {
    + SET_RUNTIME_PM_OPS(rx_macro_runtime_suspend, rx_macro_runtime_resume, NULL)
    +};
    +
    static struct platform_driver rx_macro_driver = {
    .driver = {
    .name = "rx_macro",
    .of_match_table = rx_macro_dt_match,
    .suppress_bind_attrs = true,
    + .pm = &rx_macro_pm_ops,
    },
    .probe = rx_macro_probe,
    .remove = rx_macro_remove,
    --
    2.21.0
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