1 files changed, 265 insertions, 0 deletions
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
new file mode 100644
index 000000000..4523e4e83
--- /dev/null
+++ b/include/linux/nvmem-consumer.h
@@ -0,0 +1,265 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * nvmem framework consumer.
+ *
+ * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+ * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
+ */
+
+#ifndef _LINUX_NVMEM_CONSUMER_H
+#define _LINUX_NVMEM_CONSUMER_H
+
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/notifier.h>
+
+struct device;
+struct device_node;
+/* consumer cookie */
+struct nvmem_cell;
+struct nvmem_device;
+struct nvmem_cell_info;
+
+/**
+ * struct nvmem_cell_lookup - cell lookup entry
+ *
+ * @nvmem_name:	Name of the provider.
+ * @cell_name:	Name of the nvmem cell as defined in the name field of
+ *		struct nvmem_cell_info.
+ * @dev_id:	Name of the consumer device that will be associated with
+ *		this cell.
+ * @con_id:	Connector id for this cell lookup.
+ */
+struct nvmem_cell_lookup {
+	const char		*nvmem_name;
+	const char		*cell_name;
+	const char		*dev_id;
+	const char		*con_id;
+	struct list_head	node;
+};
+
+enum {
+	NVMEM_ADD = 1,
+	NVMEM_REMOVE,
+	NVMEM_CELL_ADD,
+	NVMEM_CELL_REMOVE,
+	NVMEM_LAYOUT_ADD,
+	NVMEM_LAYOUT_REMOVE,
+};
+
+#if IS_ENABLED(CONFIG_NVMEM)
+
+/* Cell based interface */
+struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *id);
+struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *id);
+void nvmem_cell_put(struct nvmem_cell *cell);
+void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell);
+void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len);
+int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len);
+int nvmem_cell_read_u8(struct device *dev, const char *cell_id, u8 *val);
+int nvmem_cell_read_u16(struct device *dev, const char *cell_id, u16 *val);
+int nvmem_cell_read_u32(struct device *dev, const char *cell_id, u32 *val);
+int nvmem_cell_read_u64(struct device *dev, const char *cell_id, u64 *val);
+int nvmem_cell_read_variable_le_u32(struct device *dev, const char *cell_id,
+				    u32 *val);
+int nvmem_cell_read_variable_le_u64(struct device *dev, const char *cell_id,
+				    u64 *val);
+
+/* direct nvmem device read/write interface */
+struct nvmem_device *nvmem_device_get(struct device *dev, const char *name);
+struct nvmem_device *devm_nvmem_device_get(struct device *dev,
+					   const char *name);
+void nvmem_device_put(struct nvmem_device *nvmem);
+void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem);
+int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset,
+		      size_t bytes, void *buf);
+int nvmem_device_write(struct nvmem_device *nvmem, unsigned int offset,
+		       size_t bytes, void *buf);
+ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem,
+			   struct nvmem_cell_info *info, void *buf);
+int nvmem_device_cell_write(struct nvmem_device *nvmem,
+			    struct nvmem_cell_info *info, void *buf);
+
+const char *nvmem_dev_name(struct nvmem_device *nvmem);
+
+void nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries,
+			    size_t nentries);
+void nvmem_del_cell_lookups(struct nvmem_cell_lookup *entries,
+			    size_t nentries);
+
+int nvmem_register_notifier(struct notifier_block *nb);
+int nvmem_unregister_notifier(struct notifier_block *nb);
+
+struct nvmem_device *nvmem_device_find(void *data,
+			int (*match)(struct device *dev, const void *data));
+
+#else
+
+static inline struct nvmem_cell *nvmem_cell_get(struct device *dev,
+						const char *id)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline struct nvmem_cell *devm_nvmem_cell_get(struct device *dev,
+						     const char *id)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline void devm_nvmem_cell_put(struct device *dev,
+				       struct nvmem_cell *cell)
+{
+
+}
+static inline void nvmem_cell_put(struct nvmem_cell *cell)
+{
+}
+
+static inline void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline int nvmem_cell_write(struct nvmem_cell *cell,
+				   void *buf, size_t len)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int nvmem_cell_read_u16(struct device *dev,
+				      const char *cell_id, u16 *val)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int nvmem_cell_read_u32(struct device *dev,
+				      const char *cell_id, u32 *val)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int nvmem_cell_read_u64(struct device *dev,
+				      const char *cell_id, u64 *val)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int nvmem_cell_read_variable_le_u32(struct device *dev,
+						 const char *cell_id,
+						 u32 *val)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int nvmem_cell_read_variable_le_u64(struct device *dev,
+						  const char *cell_id,
+						  u64 *val)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline struct nvmem_device *nvmem_device_get(struct device *dev,
+						    const char *name)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline struct nvmem_device *devm_nvmem_device_get(struct device *dev,
+							 const char *name)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline void nvmem_device_put(struct nvmem_device *nvmem)
+{
+}
+
+static inline void devm_nvmem_device_put(struct device *dev,
+					 struct nvmem_device *nvmem)
+{
+}
+
+static inline ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem,
+					 struct nvmem_cell_info *info,
+					 void *buf)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int nvmem_device_cell_write(struct nvmem_device *nvmem,
+					  struct nvmem_cell_info *info,
+					  void *buf)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int nvmem_device_read(struct nvmem_device *nvmem,
+				    unsigned int offset, size_t bytes,
+				    void *buf)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int nvmem_device_write(struct nvmem_device *nvmem,
+				     unsigned int offset, size_t bytes,
+				     void *buf)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline const char *nvmem_dev_name(struct nvmem_device *nvmem)
+{
+	return NULL;
+}
+
+static inline void
+nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries, size_t nentries) {}
+static inline void
+nvmem_del_cell_lookups(struct nvmem_cell_lookup *entries, size_t nentries) {}
+
+static inline int nvmem_register_notifier(struct notifier_block *nb)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int nvmem_unregister_notifier(struct notifier_block *nb)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline struct nvmem_device *nvmem_device_find(void *data,
+			int (*match)(struct device *dev, const void *data))
+{
+	return NULL;
+}
+
+#endif /* CONFIG_NVMEM */
+
+#if IS_ENABLED(CONFIG_NVMEM) && IS_ENABLED(CONFIG_OF)
+struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
+				     const char *id);
+struct nvmem_device *of_nvmem_device_get(struct device_node *np,
+					 const char *name);
+struct device_node *of_nvmem_layout_get_container(struct nvmem_device *nvmem);
+#else
+static inline struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
+						   const char *id)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline struct nvmem_device *of_nvmem_device_get(struct device_node *np,
+						       const char *name)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline struct device_node *
+of_nvmem_layout_get_container(struct nvmem_device *nvmem)
+{
+	return NULL;
+}
+#endif /* CONFIG_NVMEM && CONFIG_OF */
+
+#endif  /* ifndef _LINUX_NVMEM_CONSUMER_H */