v4.19.13 snapshot.
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
new file mode 100644
index 0000000..4e85447
--- /dev/null
+++ b/include/linux/nvmem-consumer.h
@@ -0,0 +1,167 @@
+/*
+ * nvmem framework consumer.
+ *
+ * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+ * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef _LINUX_NVMEM_CONSUMER_H
+#define _LINUX_NVMEM_CONSUMER_H
+
+#include <linux/err.h>
+#include <linux/errno.h>
+
+struct device;
+struct device_node;
+/* consumer cookie */
+struct nvmem_cell;
+struct nvmem_device;
+
+struct nvmem_cell_info {
+ const char *name;
+ unsigned int offset;
+ unsigned int bytes;
+ unsigned int bit_offset;
+ unsigned int nbits;
+};
+
+#if IS_ENABLED(CONFIG_NVMEM)
+
+/* Cell based interface */
+struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *name);
+struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *name);
+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_u32(struct device *dev, const char *cell_id, u32 *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);
+
+#else
+
+static inline struct nvmem_cell *nvmem_cell_get(struct device *dev,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline struct nvmem_cell *devm_nvmem_cell_get(struct device *dev,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+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(-ENOSYS);
+}
+
+static inline int nvmem_cell_write(struct nvmem_cell *cell,
+ const char *buf, size_t len)
+{
+ return -ENOSYS;
+}
+
+static inline int nvmem_cell_read_u32(struct device *dev,
+ const char *cell_id, u32 *val)
+{
+ return -ENOSYS;
+}
+
+static inline struct nvmem_device *nvmem_device_get(struct device *dev,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline struct nvmem_device *devm_nvmem_device_get(struct device *dev,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+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 -ENOSYS;
+}
+
+static inline int nvmem_device_cell_write(struct nvmem_device *nvmem,
+ struct nvmem_cell_info *info,
+ void *buf)
+{
+ return -ENOSYS;
+}
+
+static inline int nvmem_device_read(struct nvmem_device *nvmem,
+ unsigned int offset, size_t bytes,
+ void *buf)
+{
+ return -ENOSYS;
+}
+
+static inline int nvmem_device_write(struct nvmem_device *nvmem,
+ unsigned int offset, size_t bytes,
+ void *buf)
+{
+ return -ENOSYS;
+}
+#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 *name);
+struct nvmem_device *of_nvmem_device_get(struct device_node *np,
+ const char *name);
+#else
+static inline struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline struct nvmem_device *of_nvmem_device_get(struct device_node *np,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+#endif /* CONFIG_NVMEM && CONFIG_OF */
+
+#endif /* ifndef _LINUX_NVMEM_CONSUMER_H */