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| author | Alex Kiernan <alex.kiernan@gmail.com> | 2020-03-11 08:46:29 +0000 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2020-03-13 09:30:30 -0400 |
| commit | 4af2a33ee5b91223f993af9bb0de1a081090634b (patch) | |
| tree | 0df4c0755bfc29e427d76f9cca984464276ebbb8 /cmd/gpio.c | |
| parent | dde1b75e9526d887a9aba9d4b30eb62ad2f22013 (diff) | |
| download | u-boot-4af2a33ee5b91223f993af9bb0de1a081090634b.zip u-boot-4af2a33ee5b91223f993af9bb0de1a081090634b.tar.gz u-boot-4af2a33ee5b91223f993af9bb0de1a081090634b.tar.bz2 | |
cmd: gpio: Make `gpio input` return pin value again
4dbc107f4683 ("cmd: gpio: Correct do_gpio() return value") correctly
changed the behaviour of the gpio command to return CMD_RET_SUCCESS or
CMD_RET_FAILURE, but any existing script which expects the return value
to be the pin value is broken by this change.
Reinstate the legacy behaviour for `gpio input` only.
Fixes: 4dbc107f4683 ("cmd: gpio: Correct do_gpio() return value")
Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Signed-off-by: Alex Kiernan <alex.kiernan@hivehome.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'cmd/gpio.c')
| -rw-r--r-- | cmd/gpio.c | 7 |
1 files changed, 6 insertions, 1 deletions
@@ -248,7 +248,12 @@ static int do_gpio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) if (ret != -EBUSY) gpio_free(gpio); - return CMD_RET_SUCCESS; + /* + * Whilst wrong, the legacy gpio input command returns the pin + * value, or CMD_RET_FAILURE (which is indistinguishable from a + * valid pin value). + */ + return (sub_cmd == GPIOC_INPUT) ? value : CMD_RET_SUCCESS; err: if (ret != -EBUSY) |