ASoC: codecs: Add power domains support in digital macro codecs

Add support for enabling required power domains in digital macro codecs.
macro and dcodec power domains are being requested as clocks by HLOS
in ADSP based architectures and ADSP internally handling as powerdomains.
In ADSP bypass case need to handle them as power domains explicitly.

Signed-off-by: Srinivasa Rao Mandadapu <[email protected]>
Co-developed-by: Venkata Prasad Potturu <[email protected]>
Signed-off-by: Venkata Prasad Potturu <[email protected]>
Reported-by: kernel test robot <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

1 files changed, 67 insertions, 0 deletions

diff --git a/sound/soc/codecs/lpass-macro-common.c b/sound/soc/codecs/lpass-macro-common.c
new file mode 100644
index 000000000000..6cede75ed3b5
--- /dev/null
+++ b/sound/soc/codecs/lpass-macro-common.c
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (c) 2022, The Linux Foundation. All rights reserved.
+
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
+
+#include "lpass-macro-common.h"
+
+struct lpass_macro *lpass_macro_pds_init(struct device *dev)
+{
+	struct lpass_macro *l_pds;
+	int ret;
+
+	if (!of_find_property(dev->of_node, "power-domains", NULL))
+		return NULL;
+
+	l_pds = devm_kzalloc(dev, sizeof(*l_pds), GFP_KERNEL);
+	if (!l_pds)
+		return ERR_PTR(-ENOMEM);
+
+	l_pds->macro_pd = dev_pm_domain_attach_by_name(dev, "macro");
+	if (IS_ERR_OR_NULL(l_pds->macro_pd))
+		return NULL;
+
+	ret = pm_runtime_get_sync(l_pds->macro_pd);
+	if (ret < 0) {
+		pm_runtime_put_noidle(l_pds->macro_pd);
+		goto macro_err;
+	}
+
+	l_pds->dcodec_pd = dev_pm_domain_attach_by_name(dev, "dcodec");
+	if (IS_ERR_OR_NULL(l_pds->dcodec_pd))
+		goto dcodec_err;
+
+	ret = pm_runtime_get_sync(l_pds->dcodec_pd);
+	if (ret < 0) {
+		pm_runtime_put_noidle(l_pds->dcodec_pd);
+		goto dcodec_sync_err;
+	}
+	return l_pds;
+
+dcodec_sync_err:
+	dev_pm_domain_detach(l_pds->dcodec_pd, false);
+dcodec_err:
+	pm_runtime_put(l_pds->macro_pd);
+macro_err:
+	dev_pm_domain_detach(l_pds->macro_pd, false);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(lpass_macro_pds_init);
+
+void lpass_macro_pds_exit(struct lpass_macro *pds)
+{
+	pm_runtime_put(pds->macro_pd);
+	dev_pm_domain_detach(pds->macro_pd, false);
+	pm_runtime_put(pds->dcodec_pd);
+	dev_pm_domain_detach(pds->dcodec_pd, false);
+}
+EXPORT_SYMBOL_GPL(lpass_macro_pds_exit);
+
+MODULE_DESCRIPTION("Common macro driver");
+MODULE_LICENSE("GPL");