1 files changed, 146 insertions, 0 deletions
diff --git a/include/linux/interconnect.h b/include/linux/interconnect.h
new file mode 100644
index 000000000..2b0e784ba
--- /dev/null
+++ b/include/linux/interconnect.h
@@ -0,0 +1,146 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018-2019, Linaro Ltd.
+ * Author: Georgi Djakov <georgi.djakov@linaro.org>
+ */
+
+#ifndef __LINUX_INTERCONNECT_H
+#define __LINUX_INTERCONNECT_H
+
+#include <linux/mutex.h>
+#include <linux/types.h>
+
+/* macros for converting to icc units */
+#define Bps_to_icc(x)	((x) / 1000)
+#define kBps_to_icc(x)	(x)
+#define MBps_to_icc(x)	((x) * 1000)
+#define GBps_to_icc(x)	((x) * 1000 * 1000)
+#define bps_to_icc(x)	(1)
+#define kbps_to_icc(x)	((x) / 8 + ((x) % 8 ? 1 : 0))
+#define Mbps_to_icc(x)	((x) * 1000 / 8)
+#define Gbps_to_icc(x)	((x) * 1000 * 1000 / 8)
+
+struct icc_path;
+struct device;
+
+/**
+ * struct icc_bulk_data - Data used for bulk icc operations.
+ *
+ * @path: reference to the interconnect path (internal use)
+ * @name: the name from the "interconnect-names" DT property
+ * @avg_bw: average bandwidth in icc units
+ * @peak_bw: peak bandwidth in icc units
+ */
+struct icc_bulk_data {
+	struct icc_path	*path;
+	const char *name;
+	u32 avg_bw;
+	u32 peak_bw;
+};
+
+#if IS_ENABLED(CONFIG_INTERCONNECT)
+
+struct icc_path *icc_get(struct device *dev, const int src_id,
+			 const int dst_id);
+struct icc_path *of_icc_get(struct device *dev, const char *name);
+struct icc_path *devm_of_icc_get(struct device *dev, const char *name);
+int devm_of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths);
+struct icc_path *of_icc_get_by_index(struct device *dev, int idx);
+void icc_put(struct icc_path *path);
+int icc_enable(struct icc_path *path);
+int icc_disable(struct icc_path *path);
+int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw);
+void icc_set_tag(struct icc_path *path, u32 tag);
+const char *icc_get_name(struct icc_path *path);
+int __must_check of_icc_bulk_get(struct device *dev, int num_paths,
+				 struct icc_bulk_data *paths);
+void icc_bulk_put(int num_paths, struct icc_bulk_data *paths);
+int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths);
+int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths);
+void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths);
+
+#else
+
+static inline struct icc_path *icc_get(struct device *dev, const int src_id,
+				       const int dst_id)
+{
+	return NULL;
+}
+
+static inline struct icc_path *of_icc_get(struct device *dev,
+					  const char *name)
+{
+	return NULL;
+}
+
+static inline struct icc_path *devm_of_icc_get(struct device *dev,
+						const char *name)
+{
+	return NULL;
+}
+
+static inline struct icc_path *of_icc_get_by_index(struct device *dev, int idx)
+{
+	return NULL;
+}
+
+static inline void icc_put(struct icc_path *path)
+{
+}
+
+static inline int icc_enable(struct icc_path *path)
+{
+	return 0;
+}
+
+static inline int icc_disable(struct icc_path *path)
+{
+	return 0;
+}
+
+static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
+{
+	return 0;
+}
+
+static inline void icc_set_tag(struct icc_path *path, u32 tag)
+{
+}
+
+static inline const char *icc_get_name(struct icc_path *path)
+{
+	return NULL;
+}
+
+static inline int of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths)
+{
+	return 0;
+}
+
+static inline int devm_of_icc_bulk_get(struct device *dev, int num_paths,
+				       struct icc_bulk_data *paths)
+{
+	return 0;
+}
+
+static inline void icc_bulk_put(int num_paths, struct icc_bulk_data *paths)
+{
+}
+
+static inline int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths)
+{
+	return 0;
+}
+
+static inline int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths)
+{
+	return 0;
+}
+
+static inline void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths)
+{
+}
+
+#endif /* CONFIG_INTERCONNECT */
+
+#endif /* __LINUX_INTERCONNECT_H */