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authorWilliam Breathitt Gray <vilhelm.gray@gmail.com>2017-01-24 23:00:31 +0300
committerLinus Walleij <linus.walleij@linaro.org>2017-01-26 17:52:38 +0300
commit00de1a518aebed3bcf44389cd5dae12a77ade726 (patch)
tree97442518a7815f365302a8e6c4b80e1a8ea489e2 /drivers/gpio/gpio-104-dio-48e.c
parent283a981387c498f846e89450bd83b2c349223b4f (diff)
downloadlinux-00de1a518aebed3bcf44389cd5dae12a77ade726.tar.xz
gpio: 104-dio-48e: Utilize devm_ functions in driver probe callback
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>
Diffstat (limited to 'drivers/gpio/gpio-104-dio-48e.c')
-rw-r--r--drivers/gpio/gpio-104-dio-48e.c27
1 files changed, 5 insertions, 22 deletions
diff --git a/drivers/gpio/gpio-104-dio-48e.c b/drivers/gpio/gpio-104-dio-48e.c
index 7bc891f1d11a..221243f17d4e 100644
--- a/drivers/gpio/gpio-104-dio-48e.c
+++ b/drivers/gpio/gpio-104-dio-48e.c
@@ -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;
@@ -399,30 +396,17 @@ 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;
}
static struct isa_driver dio48e_driver = {
@@ -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);