Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1What: /sys/bus/nvmem/devices/.../force_ro
2Date: June 2024
3KernelVersion: 6.11
4Contact: Marek Vasut <marex@denx.de>
5Description:
6 This read/write attribute allows users to set read-write
7 devices as read-only and back to read-write from userspace.
8 This can be used to unlock and relock write-protection of
9 devices which are generally locked, except during sporadic
10 programming operation.
11 Read returns '0' or '1' for read-write or read-only modes
12 respectively.
13 Write parses one of 'YyTt1NnFf0', or [oO][NnFf] for "on"
14 and "off", i.e. what kstrtobool() supports.
15 Note: This file is only present if CONFIG_NVMEM_SYSFS
16 is enabled.
17
18What: /sys/bus/nvmem/devices/.../nvmem
19Date: July 2015
20KernelVersion: 4.2
21Contact: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
22Description:
23 This file allows user to read/write the raw NVMEM contents.
24 Permissions for write to this file depends on the nvmem
25 provider configuration.
26 Note: This file is only present if CONFIG_NVMEM_SYSFS
27 is enabled
28
29 ex::
30
31 hexdump /sys/bus/nvmem/devices/qfprom0/nvmem
32
33 0000000 0000 0000 0000 0000 0000 0000 0000 0000
34 *
35 00000a0 db10 2240 0000 e000 0c00 0c00 0000 0c00
36 0000000 0000 0000 0000 0000 0000 0000 0000 0000
37 ...
38 *
39 0001000
40
41What: /sys/bus/nvmem/devices/.../type
42Date: November 2018
43KernelVersion: 5.0
44Contact: Alexandre Belloni <alexandre.belloni@bootlin.com>
45Description:
46 This read-only attribute allows user to read the NVMEM
47 device type. Supported types are "Unknown", "EEPROM",
48 "OTP", "Battery backed", "FRAM".
49 Note: This file is only present if CONFIG_NVMEM_SYSFS
50 is enabled.