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Subject[PATCH 22/23] gpio: sysfs: remove FLAG_SYSFS_DIR
Date
Remove FLAG_SYSFS_DIR, which is sysfs-interface specific, and store it
in the class-device data instead.

Note that the flag is only used during export.

Signed-off-by: Johan Hovold <johan@kernel.org>
---
drivers/gpio/gpiolib-sysfs.c | 15 +++++++--------
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 00609e197f50..27a8c84fc241 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;
};

/*
@@ -339,7 +341,7 @@ 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)
@@ -568,12 +570,6 @@ 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);
@@ -584,6 +580,10 @@ 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])
@@ -678,7 +678,6 @@ 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 4deb71d2bd01..591257a4359a 100644
--- a/drivers/gpio/gpiolib.h
+++ b/drivers/gpio/gpiolib.h
@@ -87,7 +87,6 @@ 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))
--
2.0.5


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