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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/include/linux/nvmem-consumer.h
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@@ -1,12 +1,9 @@
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+/* SPDX-License-Identifier: GPL-2.0 */
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 /*
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  * nvmem framework consumer.
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  *
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  * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
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  * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
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- *
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- * This file is licensed under the terms of the GNU General Public
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- * License version 2.  This program is licensed "as is" without any
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- * warranty of any kind, whether express or implied.
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  */
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8
 
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 #ifndef _LINUX_NVMEM_CONSUMER_H
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@@ -14,6 +11,7 @@
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 #include <linux/err.h>
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 #include <linux/errno.h>
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+#include <linux/notifier.h>
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 struct device;
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 struct device_node;
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@@ -29,16 +27,44 @@
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 	unsigned int		nbits;
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 };
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29
 
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+/**
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+ * struct nvmem_cell_lookup - cell lookup entry
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+ *
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+ * @nvmem_name:	Name of the provider.
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+ * @cell_name:	Name of the nvmem cell as defined in the name field of
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+ *		struct nvmem_cell_info.
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+ * @dev_id:	Name of the consumer device that will be associated with
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+ *		this cell.
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+ * @con_id:	Connector id for this cell lookup.
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+ */
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+struct nvmem_cell_lookup {
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+	const char		*nvmem_name;
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+	const char		*cell_name;
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+	const char		*dev_id;
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+	const char		*con_id;
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+	struct list_head	node;
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+};
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+
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+enum {
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+	NVMEM_ADD = 1,
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+	NVMEM_REMOVE,
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+	NVMEM_CELL_ADD,
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+	NVMEM_CELL_REMOVE,
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+};
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+
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 #if IS_ENABLED(CONFIG_NVMEM)
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 /* Cell based interface */
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-struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *name);
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-struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *name);
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+struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *id);
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+struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *id);
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 void nvmem_cell_put(struct nvmem_cell *cell);
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 void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell);
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 void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len);
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 int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len);
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+int nvmem_cell_read_u8(struct device *dev, const char *cell_id, u8 *val);
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+int nvmem_cell_read_u16(struct device *dev, const char *cell_id, u16 *val);
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 int nvmem_cell_read_u32(struct device *dev, const char *cell_id, u32 *val);
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+int nvmem_cell_read_u64(struct device *dev, const char *cell_id, u64 *val);
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 /* direct nvmem device read/write interface */
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 struct nvmem_device *nvmem_device_get(struct device *dev, const char *name);
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@@ -57,18 +83,29 @@
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 const char *nvmem_dev_name(struct nvmem_device *nvmem);
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+void nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries,
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+			    size_t nentries);
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+void nvmem_del_cell_lookups(struct nvmem_cell_lookup *entries,
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+			    size_t nentries);
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+
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+int nvmem_register_notifier(struct notifier_block *nb);
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+int nvmem_unregister_notifier(struct notifier_block *nb);
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+
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+struct nvmem_device *nvmem_device_find(void *data,
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+			int (*match)(struct device *dev, const void *data));
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+
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 #else
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 static inline struct nvmem_cell *nvmem_cell_get(struct device *dev,
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-						const char *name)
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+						const char *id)
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 {
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-	return ERR_PTR(-ENOSYS);
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+	return ERR_PTR(-EOPNOTSUPP);
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 }
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 static inline struct nvmem_cell *devm_nvmem_cell_get(struct device *dev,
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-				       const char *name)
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+						     const char *id)
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 {
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-	return ERR_PTR(-ENOSYS);
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+	return ERR_PTR(-EOPNOTSUPP);
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 }
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 static inline void devm_nvmem_cell_put(struct device *dev,
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@@ -82,31 +119,43 @@
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 static inline void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)
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 {
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-	return ERR_PTR(-ENOSYS);
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+	return ERR_PTR(-EOPNOTSUPP);
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 }
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 static inline int nvmem_cell_write(struct nvmem_cell *cell,
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-				    const char *buf, size_t len)
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+				   void *buf, size_t len)
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 {
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-	return -ENOSYS;
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+	return -EOPNOTSUPP;
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+}
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+
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+static inline int nvmem_cell_read_u16(struct device *dev,
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+				      const char *cell_id, u16 *val)
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+{
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+	return -EOPNOTSUPP;
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 }
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 static inline int nvmem_cell_read_u32(struct device *dev,
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 				      const char *cell_id, u32 *val)
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 {
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-	return -ENOSYS;
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+	return -EOPNOTSUPP;
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+}
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+
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+static inline int nvmem_cell_read_u64(struct device *dev,
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+				      const char *cell_id, u64 *val)
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+{
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+	return -EOPNOTSUPP;
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 }
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 static inline struct nvmem_device *nvmem_device_get(struct device *dev,
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 						    const char *name)
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 {
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-	return ERR_PTR(-ENOSYS);
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+	return ERR_PTR(-EOPNOTSUPP);
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 }
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 static inline struct nvmem_device *devm_nvmem_device_get(struct device *dev,
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 							 const char *name)
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 {
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-	return ERR_PTR(-ENOSYS);
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+	return ERR_PTR(-EOPNOTSUPP);
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 }
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 static inline void nvmem_device_put(struct nvmem_device *nvmem)
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@@ -122,31 +171,52 @@
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 					 struct nvmem_cell_info *info,
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 					 void *buf)
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 {
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-	return -ENOSYS;
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+	return -EOPNOTSUPP;
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 }
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 static inline int nvmem_device_cell_write(struct nvmem_device *nvmem,
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 					  struct nvmem_cell_info *info,
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 					  void *buf)
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 {
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-	return -ENOSYS;
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+	return -EOPNOTSUPP;
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 }
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 static inline int nvmem_device_read(struct nvmem_device *nvmem,
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 				    unsigned int offset, size_t bytes,
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 				    void *buf)
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 {
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-	return -ENOSYS;
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+	return -EOPNOTSUPP;
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 }
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 static inline int nvmem_device_write(struct nvmem_device *nvmem,
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 				     unsigned int offset, size_t bytes,
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 				     void *buf)
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 {
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-	return -ENOSYS;
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+	return -EOPNOTSUPP;
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 }
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 static inline const char *nvmem_dev_name(struct nvmem_device *nvmem)
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+{
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+	return NULL;
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+}
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+
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+static inline void
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+nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries, size_t nentries) {}
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+static inline void
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+nvmem_del_cell_lookups(struct nvmem_cell_lookup *entries, size_t nentries) {}
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+
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+static inline int nvmem_register_notifier(struct notifier_block *nb)
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+{
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+	return -EOPNOTSUPP;
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+}
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+
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+static inline int nvmem_unregister_notifier(struct notifier_block *nb)
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+{
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+	return -EOPNOTSUPP;
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+}
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+
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+static inline struct nvmem_device *nvmem_device_find(void *data,
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+			int (*match)(struct device *dev, const void *data))
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 {
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 	return NULL;
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 }
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@@ -155,20 +225,20 @@
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 #if IS_ENABLED(CONFIG_NVMEM) && IS_ENABLED(CONFIG_OF)
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 struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
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-				     const char *name);
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+				     const char *id);
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 struct nvmem_device *of_nvmem_device_get(struct device_node *np,
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 					 const char *name);
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 #else
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 static inline struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
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-				     const char *name)
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+						   const char *id)
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 {
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-	return ERR_PTR(-ENOSYS);
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+	return ERR_PTR(-EOPNOTSUPP);
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 }
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 static inline struct nvmem_device *of_nvmem_device_get(struct device_node *np,
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 						       const char *name)
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 {
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-	return ERR_PTR(-ENOSYS);
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+	return ERR_PTR(-EOPNOTSUPP);
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 }
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 #endif /* CONFIG_NVMEM && CONFIG_OF */
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