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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>
63 lines
1.5 KiB
C
63 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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