diff options
| author | Simon Glass <sjg@chromium.org> | 2014-08-11 09:23:53 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2014-08-31 23:21:19 -0600 |
| commit | 9165e8428d02b42b7f2b87083035e4e2493df721 (patch) | |
| tree | b9bc1b8501cadb93ba49da25c83d61674ef2c6a0 /common | |
| parent | 89e6405425c7b52fd1330c61b6f5526612b87516 (diff) | |
| download | u-boot-imx-9165e8428d02b42b7f2b87083035e4e2493df721.zip u-boot-imx-9165e8428d02b42b7f2b87083035e4e2493df721.tar.gz u-boot-imx-9165e8428d02b42b7f2b87083035e4e2493df721.tar.bz2 | |
dm: gpio: Allow gpio command to adjust GPIOs that are busy
The gpio command mostly relies on gpio_request() and gpio_free() being
nops, in that you can request a GPIO twice. With driver model this is
now implemented correctly, so it fails.
Change the command to deal with a failure to claim the GPIO.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'common')
| -rw-r--r-- | common/cmd_gpio.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/common/cmd_gpio.c b/common/cmd_gpio.c index b97533f..11f4e40 100644 --- a/common/cmd_gpio.c +++ b/common/cmd_gpio.c @@ -8,6 +8,7 @@ #include <common.h> #include <command.h> +#include <errno.h> #include <dm.h> #include <asm/gpio.h> @@ -135,9 +136,9 @@ static int do_gpio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) enum gpio_cmd sub_cmd; ulong value; const char *str_cmd, *str_gpio = NULL; + int ret; #ifdef CONFIG_DM_GPIO bool all = false; - int ret; #endif if (argc < 2) @@ -197,7 +198,8 @@ static int do_gpio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) goto show_usage; #endif /* grab the pin before we tweak it */ - if (gpio_request(gpio, "cmd_gpio")) { + ret = gpio_request(gpio, "cmd_gpio"); + if (ret && ret != -EBUSY) { printf("gpio: requesting pin %u failed\n", gpio); return -1; } @@ -218,7 +220,8 @@ static int do_gpio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) printf("gpio: pin %s (gpio %i) value is %lu\n", str_gpio, gpio, value); - gpio_free(gpio); + if (ret != -EBUSY) + gpio_free(gpio); return value; } |