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path: root/drivers/nvmem/nvmem-sysfs.c
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Diffstat (limited to 'drivers/nvmem/nvmem-sysfs.c')
-rw-r--r--drivers/nvmem/nvmem-sysfs.c263
1 files changed, 0 insertions, 263 deletions
diff --git a/drivers/nvmem/nvmem-sysfs.c b/drivers/nvmem/nvmem-sysfs.c
deleted file mode 100644
index 9e0c429cd08a..000000000000
--- a/drivers/nvmem/nvmem-sysfs.c
+++ /dev/null
@@ -1,263 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (c) 2019, Linaro Limited
- */
-#include "nvmem.h"
-
-static const char * const nvmem_type_str[] = {
- [NVMEM_TYPE_UNKNOWN] = "Unknown",
- [NVMEM_TYPE_EEPROM] = "EEPROM",
- [NVMEM_TYPE_OTP] = "OTP",
- [NVMEM_TYPE_BATTERY_BACKED] = "Battery backed",
-};
-
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-static struct lock_class_key eeprom_lock_key;
-#endif
-
-static ssize_t type_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct nvmem_device *nvmem = to_nvmem_device(dev);
-
- return sprintf(buf, "%s\n", nvmem_type_str[nvmem->type]);
-}
-
-static DEVICE_ATTR_RO(type);
-
-static struct attribute *nvmem_attrs[] = {
- &dev_attr_type.attr,
- NULL,
-};
-
-static ssize_t bin_attr_nvmem_read(struct file *filp, struct kobject *kobj,
- struct bin_attribute *attr,
- char *buf, loff_t pos, size_t count)
-{
- struct device *dev;
- struct nvmem_device *nvmem;
- int rc;
-
- if (attr->private)
- dev = attr->private;
- else
- dev = container_of(kobj, struct device, kobj);
- nvmem = to_nvmem_device(dev);
-
- /* Stop the user from reading */
- if (pos >= nvmem->size)
- return 0;
-
- if (count < nvmem->word_size)
- return -EINVAL;
-
- if (pos + count > nvmem->size)
- count = nvmem->size - pos;
-
- count = round_down(count, nvmem->word_size);
-
- rc = nvmem->reg_read(nvmem->priv, pos, buf, count);
-
- if (rc)
- return rc;
-
- return count;
-}
-
-static ssize_t bin_attr_nvmem_write(struct file *filp, struct kobject *kobj,
- struct bin_attribute *attr,
- char *buf, loff_t pos, size_t count)
-{
- struct device *dev;
- struct nvmem_device *nvmem;
- int rc;
-
- if (attr->private)
- dev = attr->private;
- else
- dev = container_of(kobj, struct device, kobj);
- nvmem = to_nvmem_device(dev);
-
- /* Stop the user from writing */
- if (pos >= nvmem->size)
- return -EFBIG;
-
- if (count < nvmem->word_size)
- return -EINVAL;
-
- if (pos + count > nvmem->size)
- count = nvmem->size - pos;
-
- count = round_down(count, nvmem->word_size);
-
- rc = nvmem->reg_write(nvmem->priv, pos, buf, count);
-
- if (rc)
- return rc;
-
- return count;
-}
-
-/* default read/write permissions */
-static struct bin_attribute bin_attr_rw_nvmem = {
- .attr = {
- .name = "nvmem",
- .mode = 0644,
- },
- .read = bin_attr_nvmem_read,
- .write = bin_attr_nvmem_write,
-};
-
-static struct bin_attribute *nvmem_bin_rw_attributes[] = {
- &bin_attr_rw_nvmem,
- NULL,
-};
-
-static const struct attribute_group nvmem_bin_rw_group = {
- .bin_attrs = nvmem_bin_rw_attributes,
- .attrs = nvmem_attrs,
-};
-
-static const struct attribute_group *nvmem_rw_dev_groups[] = {
- &nvmem_bin_rw_group,
- NULL,
-};
-
-/* read only permission */
-static struct bin_attribute bin_attr_ro_nvmem = {
- .attr = {
- .name = "nvmem",
- .mode = 0444,
- },
- .read = bin_attr_nvmem_read,
-};
-
-static struct bin_attribute *nvmem_bin_ro_attributes[] = {
- &bin_attr_ro_nvmem,
- NULL,
-};
-
-static const struct attribute_group nvmem_bin_ro_group = {
- .bin_attrs = nvmem_bin_ro_attributes,
- .attrs = nvmem_attrs,
-};
-
-static const struct attribute_group *nvmem_ro_dev_groups[] = {
- &nvmem_bin_ro_group,
- NULL,
-};
-
-/* default read/write permissions, root only */
-static struct bin_attribute bin_attr_rw_root_nvmem = {
- .attr = {
- .name = "nvmem",
- .mode = 0600,
- },
- .read = bin_attr_nvmem_read,
- .write = bin_attr_nvmem_write,
-};
-
-static struct bin_attribute *nvmem_bin_rw_root_attributes[] = {
- &bin_attr_rw_root_nvmem,
- NULL,
-};
-
-static const struct attribute_group nvmem_bin_rw_root_group = {
- .bin_attrs = nvmem_bin_rw_root_attributes,
- .attrs = nvmem_attrs,
-};
-
-static const struct attribute_group *nvmem_rw_root_dev_groups[] = {
- &nvmem_bin_rw_root_group,
- NULL,
-};
-
-/* read only permission, root only */
-static struct bin_attribute bin_attr_ro_root_nvmem = {
- .attr = {
- .name = "nvmem",
- .mode = 0400,
- },
- .read = bin_attr_nvmem_read,
-};
-
-static struct bin_attribute *nvmem_bin_ro_root_attributes[] = {
- &bin_attr_ro_root_nvmem,
- NULL,
-};
-
-static const struct attribute_group nvmem_bin_ro_root_group = {
- .bin_attrs = nvmem_bin_ro_root_attributes,
- .attrs = nvmem_attrs,
-};
-
-static const struct attribute_group *nvmem_ro_root_dev_groups[] = {
- &nvmem_bin_ro_root_group,
- NULL,
-};
-
-const struct attribute_group **nvmem_sysfs_get_groups(
- struct nvmem_device *nvmem,
- const struct nvmem_config *config)
-{
- if (config->root_only)
- return nvmem->read_only ?
- nvmem_ro_root_dev_groups :
- nvmem_rw_root_dev_groups;
-
- return nvmem->read_only ? nvmem_ro_dev_groups : nvmem_rw_dev_groups;
-}
-
-/*
- * nvmem_setup_compat() - Create an additional binary entry in
- * drivers sys directory, to be backwards compatible with the older
- * drivers/misc/eeprom drivers.
- */
-int nvmem_sysfs_setup_compat(struct nvmem_device *nvmem,
- const struct nvmem_config *config)
-{
- int rval;
-
- if (!config->compat)
- return 0;
-
- if (!config->base_dev)
- return -EINVAL;
-
- if (nvmem->read_only) {
- if (config->root_only)
- nvmem->eeprom = bin_attr_ro_root_nvmem;
- else
- nvmem->eeprom = bin_attr_ro_nvmem;
- } else {
- if (config->root_only)
- nvmem->eeprom = bin_attr_rw_root_nvmem;
- else
- nvmem->eeprom = bin_attr_rw_nvmem;
- }
- nvmem->eeprom.attr.name = "eeprom";
- nvmem->eeprom.size = nvmem->size;
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
- nvmem->eeprom.attr.key = &eeprom_lock_key;
-#endif
- nvmem->eeprom.private = &nvmem->dev;
- nvmem->base_dev = config->base_dev;
-
- rval = device_create_bin_file(nvmem->base_dev, &nvmem->eeprom);
- if (rval) {
- dev_err(&nvmem->dev,
- "Failed to create eeprom binary file %d\n", rval);
- return rval;
- }
-
- nvmem->flags |= FLAG_COMPAT;
-
- return 0;
-}
-
-void nvmem_sysfs_remove_compat(struct nvmem_device *nvmem,
- const struct nvmem_config *config)
-{
- if (config->compat)
- device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom);
-}
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-29 21:50:23 +0300