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cfc402db39
Add a command to read edit settings from CMOS RAM, using the cedit definition to indicate which registers and bits are used. Signed-off-by: Simon Glass <sjg@chromium.org>
149 lines
3.5 KiB
ReStructuredText
149 lines
3.5 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+:
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cedit command
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=============
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Synopis
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-------
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::
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cedit load <interface> <dev[:part]> <filename>
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cedit run
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cedit write_fdt <dev[:part]> <filename>
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cedit read_fdt <dev[:part]> <filename>
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cedit write_env [-v]
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cedit read_env [-v]
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cedit write_cmos [-v] [dev]
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Description
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-----------
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The *cedit* command is used to load a configuration-editor description and allow
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the user to interact with it.
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It makes use of the expo subsystem.
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The description is in the form of a devicetree file, as documented at
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:ref:`expo_format`.
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See :doc:`../../develop/cedit` for information about the configuration editor.
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cedit load
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~~~~~~~~~~
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Loads a configuration-editor description from a file. It creates a new cedit
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structure ready for use. Initially no settings are read, so default values are
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used for each object.
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cedit run
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~~~~~~~~~
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Runs the default configuration-editor event loop. This is very simple, just
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accepting character input and moving through the objects under user control.
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The implementation is at `cedit_run()`.
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cedit write_fdt
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~~~~~~~~~~~~~~~
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Writes the current user settings to a devicetree file. For each menu item the
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selected ID and its text string are written.
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cedit read_fdt
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~~~~~~~~~~~~~~
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Reads the user settings from a devicetree file and updates the cedit with those
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settings.
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cedit read_env
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~~~~~~~~~~~~~~
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Reads the settings from the environment variables. For each menu item `<name>`,
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cedit looks for a variable called `c.<name>` with the ID of the selected menu
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item.
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The `-v` flag enables verbose mode, where each variable is printed after it is
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read.
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cedit write_env
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~~~~~~~~~~~~~~~
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Writes the settings to environment variables. For each menu item the selected
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ID and its text string are written, similar to:
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setenv c.<name> <selected_id>
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setenv c.<name>-str <selected_id's text string>
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The `-v` flag enables verbose mode, where each variable is printed before it is
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set.
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cedit write_cmos
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~~~~~~~~~~~~~~~~
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Writes the settings to locations in the CMOS RAM. The locations used are
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specified by the schema. See `expo_format_`.
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The `-v` flag enables verbose mode, which shows which CMOS locations were
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updated.
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Normally the first RTC device is used to hold the data. You can specify a
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different device by name using the `dev` parameter.
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Example
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-------
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::
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=> cedit load hostfs - fred.dtb
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=> cedit run
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=> cedit write_fdt hostfs - settings.dtb
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That results in::
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/ {
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cedit-values {
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cpu-speed = <0x00000006>;
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cpu-speed-str = "2 GHz";
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power-loss = <0x0000000a>;
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power-loss-str = "Always Off";
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};
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}
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=> cedit read_fdt hostfs - settings.dtb
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This shows settings being stored in the environment::
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=> cedit write_env -v
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c.cpu-speed=7
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c.cpu-speed-str=2.5 GHz
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c.power-loss=12
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c.power-loss-str=Memory
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=> print
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...
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c.cpu-speed=6
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c.cpu-speed-str=2 GHz
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c.power-loss=10
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c.power-loss-str=Always Off
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...
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=> cedit read_env -v
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c.cpu-speed=7
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c.power-loss=12
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This shows writing to CMOS RAM. Notice that the bytes at 80 and 84 change::
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=> rtc read 80 8
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00000080: 00 00 00 00 00 2f 2a 08 ...../*.
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=> cedit write_cmos -v
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Write 2 bytes from offset 80 to 84
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=> rtc read 80 8
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00000080: 01 00 00 00 08 2f 2a 08 ...../*.
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=> cedit read_cmos -v
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Read 2 bytes from offset 80 to 84
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Here is an example with the device specified::
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=> cedit write_cmos rtc@43
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=>
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