1 files changed, 84 insertions, 0 deletions
diff --git a/sound/soc/msm/msm-pcm-hostless.c b/sound/soc/msm/msm-pcm-hostless.c
new file mode 100644
index 000000000000..51b0a7208462
--- /dev/null
+++ b/sound/soc/msm/msm-pcm-hostless.c
@@ -0,0 +1,84 @@
+/* Copyright (c) 2011-2014, 2017 The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <sound/core.h>
+#include <sound/soc.h>
+#include <sound/pcm.h>
+
+
+static int msm_pcm_hostless_prepare(struct snd_pcm_substream *substream)
+{
+	if (!substream) {
+		pr_err("%s: invalid params\n", __func__);
+		return -EINVAL;
+	}
+	if (pm_qos_request_active(&substream->latency_pm_qos_req))
+		pm_qos_remove_request(&substream->latency_pm_qos_req);
+
+	return 0;
+}
+
+static struct snd_pcm_ops msm_pcm_hostless_ops = {
+	.prepare = msm_pcm_hostless_prepare
+};
+
+static struct snd_soc_platform_driver msm_soc_hostless_platform = {
+	.ops		= &msm_pcm_hostless_ops,
+};
+
+static int msm_pcm_hostless_probe(struct platform_device *pdev)
+{
+
+	pr_debug("%s: dev name %s\n", __func__, dev_name(&pdev->dev));
+	return snd_soc_register_platform(&pdev->dev,
+				   &msm_soc_hostless_platform);
+}
+
+static int msm_pcm_hostless_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_platform(&pdev->dev);
+	return 0;
+}
+
+static const struct of_device_id msm_pcm_hostless_dt_match[] = {
+	{.compatible = "qcom,msm-pcm-hostless"},
+	{}
+};
+
+static struct platform_driver msm_pcm_hostless_driver = {
+	.driver = {
+		.name = "msm-pcm-hostless",
+		.owner = THIS_MODULE,
+		.of_match_table = msm_pcm_hostless_dt_match,
+	},
+	.probe = msm_pcm_hostless_probe,
+	.remove = msm_pcm_hostless_remove,
+};
+
+static int __init msm_soc_platform_init(void)
+{
+	return platform_driver_register(&msm_pcm_hostless_driver);
+}
+module_init(msm_soc_platform_init);
+
+static void __exit msm_soc_platform_exit(void)
+{
+	platform_driver_unregister(&msm_pcm_hostless_driver);
+}
+module_exit(msm_soc_platform_exit);
+
+MODULE_DESCRIPTION("Hostless platform driver");
+MODULE_LICENSE("GPL v2");