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gpio: 104-dio-48e: Utilize devm_ functions in driver probe callback

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The devm_ resource manager functions allow memory to be automatically
released when a device is unbound. This patch takes advantage of the
resource manager functions and replaces the gpiochip_add_data call and
request_irq call with the devm_gpiochip_add_data call and
devm_request_irq call respectively. In addition, the dio48e_remove
function has been removed as no longer necessary due to the use of the
relevant devm_ resource manager functions.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
William Breathitt Gray 2017-01-24 15:00:31 -05:00 committed by Linus Walleij
parent 283a981387
commit 00de1a518a
1 changed files with 5 additions and 22 deletions
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27
drivers/gpio/gpio-104-dio-48e.c
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@ -48,7 +48,6 @@ MODULE_PARM_DESC(irq, "ACCES 104-DIO-48E interrupt line numbers");
* @control: Control registers state
* @lock: synchronization lock to prevent I/O race conditions
* @base: base port address of the GPIO device
* @irq: Interrupt line number
* @irq_mask: I/O bits affected by interrupts
*/
struct dio48e_gpio {
@ -58,7 +57,6 @@ struct dio48e_gpio {
unsigned char control[2];
spinlock_t lock;
unsigned base;
unsigned irq;
unsigned char irq_mask;
};
@ -368,13 +366,12 @@ static int dio48e_probe(struct device *dev, unsigned int id)
dio48egpio->chip.set = dio48e_gpio_set;
dio48egpio->chip.set_multiple = dio48e_gpio_set_multiple;
dio48egpio->base = base[id];
dio48egpio->irq = irq[id];
spin_lock_init(&dio48egpio->lock);
dev_set_drvdata(dev, dio48egpio);
err = gpiochip_add_data(&dio48egpio->chip, dio48egpio);
err = devm_gpiochip_add_data(dev, &dio48egpio->chip, dio48egpio);
if (err) {
dev_err(dev, "GPIO registering failed (%d)\n", err);
return err;
@ -399,29 +396,16 @@ static int dio48e_probe(struct device *dev, unsigned int id)
handle_edge_irq, IRQ_TYPE_NONE);
if (err) {
dev_err(dev, "Could not add irqchip (%d)\n", err);
goto err_gpiochip_remove;
return err;
}
err = request_irq(irq[id], dio48e_irq_handler, 0, name, dio48egpio);
err = devm_request_irq(dev, irq[id], dio48e_irq_handler, 0, name,
dio48egpio);
if (err) {
dev_err(dev, "IRQ handler registering failed (%d)\n", err);
goto err_gpiochip_remove;
return err;
}
return 0;
err_gpiochip_remove:
gpiochip_remove(&dio48egpio->chip);
return err;
}
static int dio48e_remove(struct device *dev, unsigned int id)
{
struct dio48e_gpio *const dio48egpio = dev_get_drvdata(dev);
free_irq(dio48egpio->irq, dio48egpio);
gpiochip_remove(&dio48egpio->chip);
return 0;
}
@ -430,7 +414,6 @@ static struct isa_driver dio48e_driver = {
.driver = {
.name = "104-dio-48e"
},
.remove = dio48e_remove
};
module_isa_driver(dio48e_driver, num_dio48e);