diff options
| author | Nuno Sá <nuno.sa@analog.com> | 2022-07-13 16:14:18 +0300 |
|---|---|---|
| committer | Bartosz Golaszewski <brgl@bgdev.pl> | 2022-07-19 11:23:54 +0300 |
| commit | c269df8c5ad316eac47a9078e7a2339e1956637a (patch) | |
| tree | 8ad8c050bf4f4da172f1c22fab15618bd8c576bb | |
| parent | 28ba057456412794198ba6c953aa2042147c2de5 (diff) | |
| download | linux-c269df8c5ad316eac47a9078e7a2339e1956637a.tar.xz | |
gpiolib: add support for bias pull disable
This change prepares the gpio core to look at firmware flags and set
'FLAG_BIAS_DISABLE' if necessary. It works in similar way to
'GPIO_PULL_DOWN' and 'GPIO_PULL_UP'.
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
| -rw-r--r-- | drivers/gpio/gpiolib.c | 8 | ||||
| -rw-r--r-- | include/linux/gpio/machine.h | 1 |
2 files changed, 7 insertions, 2 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 9535f48e18d1..0692ec84d3b0 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -3945,9 +3945,11 @@ int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id, if (lflags & GPIO_OPEN_SOURCE) set_bit(FLAG_OPEN_SOURCE, &desc->flags); - if ((lflags & GPIO_PULL_UP) && (lflags & GPIO_PULL_DOWN)) { + if (((lflags & GPIO_PULL_UP) && (lflags & GPIO_PULL_DOWN)) || + ((lflags & GPIO_PULL_UP) && (lflags & GPIO_PULL_DISABLE)) || + ((lflags & GPIO_PULL_DOWN) && (lflags & GPIO_PULL_DISABLE))) { gpiod_err(desc, - "both pull-up and pull-down enabled, invalid configuration\n"); + "multiple pull-up, pull-down or pull-disable enabled, invalid configuration\n"); return -EINVAL; } @@ -3955,6 +3957,8 @@ int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id, set_bit(FLAG_PULL_UP, &desc->flags); else if (lflags & GPIO_PULL_DOWN) set_bit(FLAG_PULL_DOWN, &desc->flags); + else if (lflags & GPIO_PULL_DISABLE) + set_bit(FLAG_BIAS_DISABLE, &desc->flags); ret = gpiod_set_transitory(desc, (lflags & GPIO_TRANSITORY)); if (ret < 0) diff --git a/include/linux/gpio/machine.h b/include/linux/gpio/machine.h index 4d55da28e664..0b619eb7ae83 100644 --- a/include/linux/gpio/machine.h +++ b/include/linux/gpio/machine.h @@ -14,6 +14,7 @@ enum gpio_lookup_flags { GPIO_TRANSITORY = (1 << 3), GPIO_PULL_UP = (1 << 4), GPIO_PULL_DOWN = (1 << 5), + GPIO_PULL_DISABLE = (1 << 6), GPIO_LOOKUP_FLAGS_DEFAULT = GPIO_ACTIVE_HIGH | GPIO_PERSISTENT, }; |