From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/include/linux/nvmem-consumer.h | 118 +++++++++++++++++++++++++++++++++++++++++++++++------------
1 files changed, 94 insertions(+), 24 deletions(-)
diff --git a/kernel/include/linux/nvmem-consumer.h b/kernel/include/linux/nvmem-consumer.h
index 0389fe0..052293f 100644
--- a/kernel/include/linux/nvmem-consumer.h
+++ b/kernel/include/linux/nvmem-consumer.h
@@ -1,12 +1,9 @@
+/* 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>
- *
- * 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
@@ -14,6 +11,7 @@
#include <linux/err.h>
#include <linux/errno.h>
+#include <linux/notifier.h>
struct device;
struct device_node;
@@ -29,16 +27,44 @@
unsigned int nbits;
};
+/**
+ * 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,
+};
+
#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);
+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);
/* direct nvmem device read/write interface */
struct nvmem_device *nvmem_device_get(struct device *dev, const char *name);
@@ -57,18 +83,29 @@
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 *name)
+ const char *id)
{
- return ERR_PTR(-ENOSYS);
+ return ERR_PTR(-EOPNOTSUPP);
}
static inline struct nvmem_cell *devm_nvmem_cell_get(struct device *dev,
- const char *name)
+ const char *id)
{
- return ERR_PTR(-ENOSYS);
+ return ERR_PTR(-EOPNOTSUPP);
}
static inline void devm_nvmem_cell_put(struct device *dev,
@@ -82,31 +119,43 @@
static inline void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)
{
- return ERR_PTR(-ENOSYS);
+ return ERR_PTR(-EOPNOTSUPP);
}
static inline int nvmem_cell_write(struct nvmem_cell *cell,
- const char *buf, size_t len)
+ void *buf, size_t len)
{
- return -ENOSYS;
+ 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 -ENOSYS;
+ return -EOPNOTSUPP;
+}
+
+static inline int nvmem_cell_read_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(-ENOSYS);
+ return ERR_PTR(-EOPNOTSUPP);
}
static inline struct nvmem_device *devm_nvmem_device_get(struct device *dev,
const char *name)
{
- return ERR_PTR(-ENOSYS);
+ return ERR_PTR(-EOPNOTSUPP);
}
static inline void nvmem_device_put(struct nvmem_device *nvmem)
@@ -122,31 +171,52 @@
struct nvmem_cell_info *info,
void *buf)
{
- return -ENOSYS;
+ return -EOPNOTSUPP;
}
static inline int nvmem_device_cell_write(struct nvmem_device *nvmem,
struct nvmem_cell_info *info,
void *buf)
{
- return -ENOSYS;
+ return -EOPNOTSUPP;
}
static inline int nvmem_device_read(struct nvmem_device *nvmem,
unsigned int offset, size_t bytes,
void *buf)
{
- return -ENOSYS;
+ return -EOPNOTSUPP;
}
static inline int nvmem_device_write(struct nvmem_device *nvmem,
unsigned int offset, size_t bytes,
void *buf)
{
- return -ENOSYS;
+ 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;
}
@@ -155,20 +225,20 @@
#if IS_ENABLED(CONFIG_NVMEM) && IS_ENABLED(CONFIG_OF)
struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
- const char *name);
+ const char *id);
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)
+ const char *id)
{
- return ERR_PTR(-ENOSYS);
+ return ERR_PTR(-EOPNOTSUPP);
}
static inline struct nvmem_device *of_nvmem_device_get(struct device_node *np,
const char *name)
{
- return ERR_PTR(-ENOSYS);
+ return ERR_PTR(-EOPNOTSUPP);
}
#endif /* CONFIG_NVMEM && CONFIG_OF */
--
Gitblit v1.6.2