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- What: /sys/bus/nvmem/devices/.../force_ro
- Date: June 2024
- KernelVersion: 6.11
- Contact: Marek Vasut <marex@denx.de>
- Description:
- This read/write attribute allows users to set read-write
- devices as read-only and back to read-write from userspace.
- This can be used to unlock and relock write-protection of
- devices which are generally locked, except during sporadic
- programming operation.
- Read returns '0' or '1' for read-write or read-only modes
- respectively.
- Write parses one of 'YyTt1NnFf0', or [oO][NnFf] for "on"
- and "off", i.e. what kstrtobool() supports.
- Note: This file is only present if CONFIG_NVMEM_SYSFS
- is enabled.
- What: /sys/bus/nvmem/devices/.../nvmem
- Date: July 2015
- KernelVersion: 4.2
- Contact: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
- Description:
- This file allows user to read/write the raw NVMEM contents.
- Permissions for write to this file depends on the nvmem
- provider configuration.
- Note: This file is only present if CONFIG_NVMEM_SYSFS
- is enabled
- ex::
- hexdump /sys/bus/nvmem/devices/qfprom0/nvmem
- 0000000 0000 0000 0000 0000 0000 0000 0000 0000
- *
- 00000a0 db10 2240 0000 e000 0c00 0c00 0000 0c00
- 0000000 0000 0000 0000 0000 0000 0000 0000 0000
- ...
- *
- 0001000
- What: /sys/bus/nvmem/devices/.../type
- Date: November 2018
- KernelVersion: 5.0
- Contact: Alexandre Belloni <alexandre.belloni@bootlin.com>
- Description:
- This read-only attribute allows user to read the NVMEM
- device type. Supported types are "Unknown", "EEPROM",
- "OTP", "Battery backed", "FRAM".
- Note: This file is only present if CONFIG_NVMEM_SYSFS
- is enabled.
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