20 Apr
2022
20 Apr
'22
9:24 p.m.
On Mon, Apr 11, 2022 at 12:02:09PM +0200, Diego Rondini wrote:
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
Applied to u-boot/master, thanks!
--
Tom