nv: add device parameter overwrites to completion list ...

nv variables in the form dev.<devname>.* can be used to make device
parameters persistent. Add these to the completion list to make setting
these variables more convenient.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Revert "globalvar: make globalvar functions more consistent" ...

This reverts commit 1b4a05c.

globalvar: make globalvar functions more consistent ...

Similar to the device parameter functions also make the globalvar
functions more consistent. This also adds support for readonly
globalvars and changes several existing globalvars which should
really be readonly to readonly.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

globalvar: remove unused globalvar_add() ...

globalvar_add() is unused in the tree. Remove it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nvvar: add static inline dummy for nvvar_save ...

Just as the other NVVAR functions, when support for NVVAR isn't
compiled in.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

complete: Add completion for nv and globalvar commands ...

The 'nv' command is often used to create a nv variable
for an existing global variable, so add a command completion
function for this.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

globalvar: introduce globalvar_add_simple_bitmask ...

Using the just introduced param_bitmask this adds the corresponding
globalvar convenience function.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

globalvar: Move static inline functions to common/ ...

These functions will get bigger in the next patch which disqualifies
them as static inline functions.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nv: Save nv variables on shutdown ...

With this patch nv variables are automatically saved whenever barebox
shuts down (that is 'reset' is executed or a kernel is started). With
this the additional 'saveenv' step becomes unnecessary.

The nv variables are stored in the environment and the estasblished
behaviour is that files in the environment must be manually saved
using 'saveenv'. This behaviour shall be kept for now, so this patch
cannot just call 'saveenv' since that would save the modified
environment files aswell. Instead we read the environment from the
device, modifiy the nv variables and save the environment back.

Since this changes a long existing behaviour messages are printed the
first time a nv variable is modified and during shutdown when the
variables are actually saved.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Introduce non volatile device variables ...

Non volatile device variables are used to make device parameters
persistent. They are like normal non volatile variables, but set
the values of the device parameters with the corresponding name.
Every nv variable beginning with nv.dev is a non volatile device
variable. They have the form nv.dev.<devname>.<paramname> and act
on the parameter <paramname> of the device named <devname>.

The non volatile device variables are designated for example for
video modes, ethernet device ip addresses or mtd partitioning.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nvvar: add missing static inline stubs ...

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

globalvar: add missing static inline stubs ...

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

globalvar: Allow to remove globalvars ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

param_enum: Make name strings const ...

Not only the array containing the pointers should be const but
also the strings themselves, so instead of using const char **
use const char * const *.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add globalvar_add_simple_string function ...

This adds a globalvar string function to pass a pointer to a string.
With this we can directly access the string to get the variable and
don't have to getenv() the string first.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

globalvar: Add support for printing all global variables ...

This could previously only be done with 'devinfo global'. While
this is still possible this adds a more direct access via the
globalvar command. This variant also adds a '*' in front of
the variable if the corresponding non volatile variable exists.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add support for non volatile variables ...

This adds (back) support for non volatile variables. Non volatile
variables are variables which are stored in the environment over
reboot. They are used in the same way as the global variables, but
with a 'nv' command and device. The variables are stored under
/env/nv/, one variable per file. Adding a nv variable automatically
adds a global variable with the same name. Changing a nv variable
also changes the same global variable, but not the other way round.
This allows for example to configure the username as:

nv user=sha; saveenv

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

globalvar: add globalvar_add_simple_int/bool/enum/ip support ...

so we can types var

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

globalvar: Allow to set initial value ...

Calling globalvar_add_simple() and setting a value is more than common.
Add a parameter for the initial value.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

globalvar: add missing include ...

include/globalvar.h needs struct param_d, so include <param.h>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: Fix typo seperate -> separate ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

globalvar: add support to set a value to of all globalvars beginning with 'match' ...

via c global_set_match and global -r

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

globalvar: add inline when not enabled ...

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

add 'global' command ...

This implements global shell variable support. This is done by registering
a new device named 'global', so global variables are just plain device
parameters.
Global variables are useful for storing the global state in the environment.
Currently we do this by sourcing scripts instead of executing them which is
quite limiting.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>