ASoC: qcom: lpass-sc7180: Add system suspend/resume PM ops

Update lpass sc7180 platform driver with PM ops, such as
system supend and resume callbacks.
This update is required to disable clocks during supend and
avoid XO shutdown issue.

Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Tested-by: Rahul Ajmeriya <quic_rajmeriy@quicinc.com>
Link: https://lore.kernel.org/r/1669621742-28524-1-git-send-email-quic_srivasam@quicinc.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/qcom/lpass-sc7180.c b/sound/soc/qcom/lpass-sc7180.c
index 24a1c121cb2e9c65d185cd6c98be4f83db2bd514..9c3365ddc27407d611c0a2085610b33dab6e116f 100644 (file)
--- a/sound/soc/qcom/lpass-sc7180.c
+++ b/sound/soc/qcom/lpass-sc7180.c
@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
 #include <dt-bindings/sound/sc7180-lpass.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>
@@ -159,10 +160,34 @@ static int sc7180_lpass_exit(struct platform_device *pdev)
        struct lpass_data *drvdata = platform_get_drvdata(pdev);
 
        clk_bulk_disable_unprepare(drvdata->num_clks, drvdata->clks);
+       return 0;
+}
+
+static int sc7180_lpass_dev_resume(struct device *dev)
+{
+       int ret = 0;
+       struct lpass_data *drvdata = dev_get_drvdata(dev);
 
+       ret = clk_bulk_prepare_enable(drvdata->num_clks, drvdata->clks);
+       if (ret) {
+               dev_err(dev, "sc7180 clk prepare and enable failed\n");
+               return ret;
+       }
+       return ret;
+}
+
+static int sc7180_lpass_dev_suspend(struct device *dev)
+{
+       struct lpass_data *drvdata = dev_get_drvdata(dev);
+
+       clk_bulk_disable_unprepare(drvdata->num_clks, drvdata->clks);
        return 0;
 }
 
+static const struct dev_pm_ops sc7180_lpass_pm_ops = {
+       SET_SYSTEM_SLEEP_PM_OPS(sc7180_lpass_dev_suspend, sc7180_lpass_dev_resume)
+};
+
 static struct lpass_variant sc7180_data = {
        .i2sctrl_reg_base       = 0x1000,
        .i2sctrl_reg_stride     = 0x1000,
@@ -296,6 +321,7 @@ static struct platform_driver sc7180_lpass_cpu_platform_driver = {
        .driver = {
                .name = "sc7180-lpass-cpu",
                .of_match_table = of_match_ptr(sc7180_lpass_cpu_device_id),
+               .pm = &sc7180_lpass_pm_ops,
        },
        .probe = asoc_qcom_lpass_cpu_platform_probe,
        .remove = asoc_qcom_lpass_cpu_platform_remove,