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counter: Provide a wrapper to access device private data

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For now this just wraps accessing struct counter_device::priv. However
this is about to change and converting drivers to this helper
individually makes fixing device lifetime issues result in easier to
review patches.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20211230150300.72196-5-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Uwe Kleine-König 2021-12-30 16:02:41 +01:00 committed by Greg Kroah-Hartman
parent 0880603c84
commit 5207fb2f31
2 changed files with 14 additions and 0 deletions
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12
drivers/counter/counter-core.c
View file

@ -45,6 +45,18 @@ static struct bus_type counter_bus_type = {
static dev_t counter_devt;
/**
* counter_priv - access counter device private data
* @counter: counter device
*
* Get the counter device private data
*/
void *counter_priv(const struct counter_device *const counter)
{
return counter->priv;
}
EXPORT_SYMBOL_GPL(counter_priv);
/**
* counter_register - register Counter to the system
* @counter: pointer to Counter to register

2
include/linux/counter.h
View file

@ -329,6 +329,8 @@ struct counter_device {
struct mutex ops_exist_lock;
};
void *counter_priv(const struct counter_device *const counter);
int counter_register(struct counter_device *const counter);
void counter_unregister(struct counter_device *const counter);
int devm_counter_register(struct device *dev,