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gpiolib: provide and use gpiod_line_state_notify()

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Wrap the calls to blocking_notifier_call_chain() for the line state
notifier with a helper that allows us to use fewer lines of code and
simpler syntax.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Bartosz Golaszewski 2023-08-21 16:18:27 +02:00
parent 91043f5593
commit 9ce4ed5b4d
3 changed files with 14 additions and 16 deletions
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17
drivers/gpio/gpiolib-cdev.c
View File

@ -230,9 +230,7 @@ static long linehandle_set_config(struct linehandle_state *lh,
return ret;
}
blocking_notifier_call_chain(&desc->gdev->line_state_notifier,
GPIO_V2_LINE_CHANGED_CONFIG,
desc);
gpiod_line_state_notify(desc, GPIO_V2_LINE_CHANGED_CONFIG);
}
return 0;
}
@ -414,8 +412,7 @@ static int linehandle_create(struct gpio_device *gdev, void __user *ip)
goto out_free_lh;
}
blocking_notifier_call_chain(&desc->gdev->line_state_notifier,
GPIO_V2_LINE_CHANGED_REQUESTED, desc);
gpiod_line_state_notify(desc, GPIO_V2_LINE_CHANGED_REQUESTED);
dev_dbg(&gdev->dev, "registered chardev handle for line %d\n",
offset);
@ -1420,9 +1417,7 @@ static long linereq_set_config_unlocked(struct linereq *lr,
WRITE_ONCE(line->edflags, edflags);
blocking_notifier_call_chain(&desc->gdev->line_state_notifier,
GPIO_V2_LINE_CHANGED_CONFIG,
desc);
gpiod_line_state_notify(desc, GPIO_V2_LINE_CHANGED_CONFIG);
}
return 0;
}
@ -1737,8 +1732,7 @@ static int linereq_create(struct gpio_device *gdev, void __user *ip)
lr->lines[i].edflags = edflags;
blocking_notifier_call_chain(&desc->gdev->line_state_notifier,
GPIO_V2_LINE_CHANGED_REQUESTED, desc);
gpiod_line_state_notify(desc, GPIO_V2_LINE_CHANGED_REQUESTED);
dev_dbg(&gdev->dev, "registered chardev handle for line %d\n",
offset);
@ -2156,8 +2150,7 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
if (ret)
goto out_free_le;
blocking_notifier_call_chain(&desc->gdev->line_state_notifier,
GPIO_V2_LINE_CHANGED_REQUESTED, desc);
gpiod_line_state_notify(desc, GPIO_V2_LINE_CHANGED_REQUESTED);
irq = gpiod_to_irq(desc);
if (irq <= 0) {

12
drivers/gpio/gpiolib.c
View File

@ -2178,8 +2178,7 @@ static bool gpiod_free_commit(struct gpio_desc *desc)
}
spin_unlock_irqrestore(&gpio_lock, flags);
blocking_notifier_call_chain(&desc->gdev->line_state_notifier,
GPIOLINE_CHANGED_RELEASED, desc);
gpiod_line_state_notify(desc, GPIOLINE_CHANGED_RELEASED);
return ret;
}
@ -3741,6 +3740,12 @@ int gpiod_set_array_value_cansleep(unsigned int array_size,
}
EXPORT_SYMBOL_GPL(gpiod_set_array_value_cansleep);
void gpiod_line_state_notify(struct gpio_desc *desc, unsigned long action)
{
blocking_notifier_call_chain(&desc->gdev->line_state_notifier,
action, desc);
}
/**
* gpiod_add_lookup_table() - register GPIO device consumers
* @table: table of consumers to register
@ -4008,8 +4013,7 @@ static struct gpio_desc *gpiod_find_and_request(struct device *consumer,
return ERR_PTR(ret);
}
blocking_notifier_call_chain(&desc->gdev->line_state_notifier,
GPIOLINE_CHANGED_REQUESTED, desc);
gpiod_line_state_notify(desc, GPIOLINE_CHANGED_REQUESTED);
return desc;
}

1
drivers/gpio/gpiolib.h
View File

@ -147,6 +147,7 @@ int gpiod_set_array_value_complex(bool raw, bool can_sleep,
extern spinlock_t gpio_lock;
extern struct list_head gpio_devices;
void gpiod_line_state_notify(struct gpio_desc *desc, unsigned long action);
/**
* struct gpio_desc - Opaque descriptor for a GPIO