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| author | Diego Rondini | 2022-04-11 12:02:09 +0200 |
|---|---|---|
| committer | Tom Rini | 2022-04-20 11:14:39 -0400 |
| commit | dd2b8c1155d016800cbbaa1bd70efdd81f9da493 (patch) | |
| tree | 127dc4d0079353e6f5cb7df708bfc5bc5f348bb5 /tools/gpimage.c | |
| parent | 270f7fd25b3d1e825d3364eee652c3ccc9d5aae4 (diff) | |
cmd: gpio: Add `gpio read` subcommand
As explained in commit 4af2a33ee5b9 ("cmd: gpio: Make `gpio input`
return pin value again") the `gpio input` is used in scripts to obtain
the value of a pin, despite the fact that CMD_RET_FAILURE is
indistinguishable from a valid pin value.
To be able to detect failures and properly use the value of a GPIO in
scripts we introduce the `gpio read` command that sets the variable
`name` to the value of the pin. Return code of the `gpio read` command
can be used to check for CMD_RET_SUCCESS or CMD_RET_FAILURE.
CONFIG_CMD_GPIO_READ is used to enable the `gpio read` command.
Signed-off-by: Diego Rondini <diego.rondini@kynetics.com>
Diffstat (limited to 'tools/gpimage.c')
0 files changed, 0 insertions, 0 deletions