forked from mirrors/linux
ae0c2d7255
Many nvmem providers are not very keen on having default sysfs nvmem entry, as most of the usecases for them are inside kernel itself. And in some cases read/writes to some areas in nvmem are restricted and trapped at secure monitor level, so accessing them from userspace would result in board reboots. This patch adds new NVMEM_SYSFS Kconfig to make binary sysfs entry an optional one. This provision will give more flexibility to users. This patch also moves existing sysfs code to a new file so that its not compiled in when its not really required. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Gaurav Kohli <gkohli@codeaurora.org> Tested-by: Gaurav Kohli <gkohli@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _DRIVERS_NVMEM_H
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#define _DRIVERS_NVMEM_H
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#include <linux/device.h>
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#include <linux/fs.h>
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#include <linux/kref.h>
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#include <linux/list.h>
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#include <linux/nvmem-consumer.h>
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#include <linux/nvmem-provider.h>
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struct nvmem_device {
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struct module *owner;
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struct device dev;
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int stride;
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int word_size;
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int id;
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struct kref refcnt;
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size_t size;
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bool read_only;
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int flags;
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enum nvmem_type type;
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struct bin_attribute eeprom;
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struct device *base_dev;
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struct list_head cells;
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nvmem_reg_read_t reg_read;
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nvmem_reg_write_t reg_write;
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void *priv;
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};
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#define to_nvmem_device(d) container_of(d, struct nvmem_device, dev)
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#define FLAG_COMPAT BIT(0)
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#ifdef CONFIG_NVMEM_SYSFS
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const struct attribute_group **nvmem_sysfs_get_groups(
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struct nvmem_device *nvmem,
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const struct nvmem_config *config);
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int nvmem_sysfs_setup_compat(struct nvmem_device *nvmem,
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const struct nvmem_config *config);
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void nvmem_sysfs_remove_compat(struct nvmem_device *nvmem,
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const struct nvmem_config *config);
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#else
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static inline const struct attribute_group **nvmem_sysfs_get_groups(
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struct nvmem_device *nvmem,
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const struct nvmem_config *config)
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{
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return NULL;
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}
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static inline int nvmem_sysfs_setup_compat(struct nvmem_device *nvmem,
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const struct nvmem_config *config)
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{
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return -ENOSYS;
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}
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static inline void nvmem_sysfs_remove_compat(struct nvmem_device *nvmem,
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const struct nvmem_config *config)
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{
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}
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#endif /* CONFIG_NVMEM_SYSFS */
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#endif /* _DRIVERS_NVMEM_H */
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