linux-toradex.git/Documentation/ABI/stable/sysfs-bus-nvmem, branch master

nvmem: Fix misspelling

2024-09-03T10:13:23+00:00

There is no function called kstrbool().

Signed-off-by: Matthew Wilcox (Oracle) 
Reviewed-by: Marek Vasut 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20240902142952.71639-9-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: core: Implement force_ro sysfs attribute

2024-07-05T07:55:05+00:00

Implement "force_ro" sysfs attribute to allow users to set read-write
devices as read-only and back to read-write from userspace. The choice
of the name is based on MMC core 'force_ro' attribute.

This solves a situation where an AT24 I2C EEPROM with GPIO based nWP
signal may have to be occasionally updated. Such I2C EEPROM device is
usually set as read-only during most of the regular system operation,
but in case it has to be updated in a controlled manner, it could be
unlocked using this new "force_ro" sysfs attribute and then re-locked
again.

The "read-only" DT property and config->read_only configuration is
respected and is used to set default state of the device, read-only
or read-write, for devices which do implement .reg_write function.
For devices which do not implement .reg_write function, the device
is unconditionally read-only and the "force_ro" attribute is not
visible.

Signed-off-by: Marek Vasut 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20240705074852.423202-16-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: Document type attribute

2024-07-05T07:55:05+00:00

Document a type attribute used by userspace to discern different types of
NVMEM devices. The implementation is already present, the ABI document is
missing, add it.

Reviewed-by: Alexandre Belloni 
Signed-off-by: Marek Vasut 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20240705074852.423202-14-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: Replace spaces with tab in documentation

2024-07-05T07:55:05+00:00

Replace two spaces with tab in the sysfs attribute documentation.
No functional change.

Signed-off-by: Marek Vasut 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20240705074852.423202-13-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

docs: ABI: stable: make files ReST compatible

2020-10-30T12:07:01+00:00

Several entries at the stable ABI files won't parse if we pass
them directly to the ReST output.

Adjust them, in order to allow adding their contents as-is at
the stable ABI book.

Acked-by: Srinivas Kandagatla 
Acked-by: Jonathan Corbet 
Signed-off-by: Mauro Carvalho Chehab 
Link: https://lore.kernel.org/r/467a0dfbcdf00db710a629d3fe4a2563750339d8.1604042072.git.mchehab+huawei@kernel.org
Signed-off-by: Greg Kroah-Hartman

nvmem: core: add NVMEM_SYSFS Kconfig

2019-04-25T17:44:33+00:00

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 
Reviewed-by: Mika Westerberg 
Reviewed-by: Gaurav Kohli 
Tested-by: Gaurav Kohli 
Signed-off-by: Greg Kroah-Hartman

Documentation/ABI: document the nvmem sysfs files

2017-08-28T15:57:52+00:00

NVMEM has been in kernel since v4.2 but the ABI document was missing
since then. userspace interface did not change since then and seems
stable, so this patch documents the nvmem ABI.

Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman