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input: kbd_matrix: add an kbd_matrix_state shell command

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Add a "input kbd_matrix_state" shell command. This prints the state of
a keyboard matrix in a much more compact representation than the normal
input event dump, but also keeps track of any key seen during the
execution and reports that on the "off" command. The output can be used
to help setting the actual-key-mask property.

Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
This commit is contained in:
Fabio Baltieri 2023-11-22 17:24:06 +00:00 • committed by Fabio Baltieri
commit e4796521f2
2 changed files with 174 additions and 0 deletions
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15
drivers/input/Kconfig.kbd_matrix
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@ -20,6 +20,21 @@ config INPUT_KBD_MATRIX_16_BIT_ROW
Use a 16 bit type for the internal structure, allow using a matrix
with up to 16 rows if the driver supports it.
config INPUT_SHELL_KBD_MATRIX_STATE
bool "Input kbd_matrix_state shell command"
depends on INPUT_SHELL
help
Enable an input kbd_matrix_state shell command to log the state of a
keyboard matrix device.
config INPUT_SHELL_KBD_MATRIX_STATE_MAX_COLS
int "Maximum column count for the kbd_matrix_state command"
default 32
depends on INPUT_SHELL_KBD_MATRIX_STATE
help
Maximum column count for a device processed by the input
kbd_matrix_state shell command.
config INPUT_KBD_DRIVE_COLUMN_HOOK
bool
help