diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/gpiolib-sysfs.c | 15 | ||||
| -rw-r--r-- | drivers/gpio/gpiolib.h | 1 |
2 files changed, 7 insertions, 9 deletions
diff --git a/drivers/gpio/gpiolib-sysfs.c b/drivers/gpio/gpiolib-sysfs.c index 06372c7c822c..9047b2d556a0 100644 --- a/drivers/gpio/gpiolib-sysfs.c +++ b/drivers/gpio/gpiolib-sysfs.c @@ -16,6 +16,8 @@ struct gpiod_data { struct mutex mutex; struct kernfs_node *value_kn; int irq; + + bool direction_can_change; }; /* @@ -354,7 +356,7 @@ static umode_t gpio_is_visible(struct kobject *kobj, struct attribute *attr, struct gpiod_data *data = dev_get_drvdata(dev); struct gpio_desc *desc = data->desc; umode_t mode = attr->mode; - bool show_direction = test_bit(FLAG_SYSFS_DIR, &desc->flags); + bool show_direction = data->direction_can_change; if (attr == &dev_attr_direction.attr) { if (!show_direction) @@ -583,12 +585,6 @@ int gpiod_export(struct gpio_desc *desc, bool direction_may_change) status = -EPERM; goto err_unlock; } - - if (chip->direction_input && chip->direction_output && - direction_may_change) { - set_bit(FLAG_SYSFS_DIR, &desc->flags); - } - spin_unlock_irqrestore(&gpio_lock, flags); data = kzalloc(sizeof(*data), GFP_KERNEL); @@ -599,6 +595,10 @@ int gpiod_export(struct gpio_desc *desc, bool direction_may_change) data->desc = desc; mutex_init(&data->mutex); + if (chip->direction_input && chip->direction_output) + data->direction_can_change = direction_may_change; + else + data->direction_can_change = false; offset = gpio_chip_hwgpio(desc); if (chip->names && chip->names[offset]) @@ -693,7 +693,6 @@ void gpiod_unexport(struct gpio_desc *desc) data = dev_get_drvdata(dev); - clear_bit(FLAG_SYSFS_DIR, &desc->flags); clear_bit(FLAG_EXPORT, &desc->flags); device_unregister(dev); diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index 5c4f27020564..479041f8d381 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -89,7 +89,6 @@ struct gpio_desc { #define FLAG_OPEN_DRAIN 7 /* Gpio is open drain type */ #define FLAG_OPEN_SOURCE 8 /* Gpio is open source type */ #define FLAG_USED_AS_IRQ 9 /* GPIO is connected to an IRQ */ -#define FLAG_SYSFS_DIR 10 /* show sysfs direction attribute */ #define FLAG_IS_HOGGED 11 /* GPIO is hogged */ #define GPIO_TRIGGER_MASK (BIT(FLAG_TRIG_FALL) | BIT(FLAG_TRIG_RISE)) |