diff options
| author | Diego Rondini <diego.rondini@kynetics.com> | 2022-04-11 12:02:09 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2022-04-20 11:14:39 -0400 |
| commit | dd2b8c1155d016800cbbaa1bd70efdd81f9da493 (patch) | |
| tree | 127dc4d0079353e6f5cb7df708bfc5bc5f348bb5 /cmd/Kconfig | |
| 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 'cmd/Kconfig')
| -rw-r--r-- | cmd/Kconfig | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/cmd/Kconfig b/cmd/Kconfig index d3abe3a06b..f580797d2d 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -996,6 +996,13 @@ config CMD_GPIO help GPIO support. +config CMD_GPIO_READ + bool "gpio read - save GPIO value to variable" + depends on CMD_GPIO + help + Enables the 'gpio read' command that saves the value + of a GPIO pin to a variable. + config CMD_PWM bool "pwm" depends on DM_PWM |