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Subject[PATCH 2/2] gpio: pca953x: use managed resources
Date
Using the devm_* managed resources the pca driver can be simplified
and cut down on boilerplate code.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/gpio/gpio-pca953x.c | 30 +++++++-----------------------
1 file changed, 7 insertions(+), 23 deletions(-)

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 51e7f15..2b04a8f 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -573,7 +573,8 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
#endif
}

- ret = request_threaded_irq(client->irq,
+ ret = devm_request_threaded_irq(&client->dev,
+ client->irq,
NULL,
pca953x_irq_handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
@@ -590,12 +591,6 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
return 0;
}

-static void pca953x_irq_teardown(struct pca953x_chip *chip)
-{
- if (chip->irq_base != -1) {
- free_irq(chip->client->irq, chip);
- }
-}
#else /* CONFIG_GPIO_PCA953X_IRQ */
static int pca953x_irq_setup(struct pca953x_chip *chip,
const struct i2c_device_id *id,
@@ -608,10 +603,6 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,

return 0;
}
-
-static void pca953x_irq_teardown(struct pca953x_chip *chip)
-{
-}
#endif

/*
@@ -730,7 +721,8 @@ static int pca953x_probe(struct i2c_client *client,
int ret;
u32 invert = 0;

- chip = kzalloc(sizeof(struct pca953x_chip), GFP_KERNEL);
+ chip = devm_kzalloc(&client->dev,
+ sizeof(struct pca953x_chip), GFP_KERNEL);
if (chip == NULL)
return -ENOMEM;

@@ -765,15 +757,15 @@ static int pca953x_probe(struct i2c_client *client,
else
ret = device_pca957x_init(chip, invert);
if (ret)
- goto out_failed;
+ return ret;

ret = pca953x_irq_setup(chip, id, irq_base);
if (ret)
- goto out_failed;
+ return ret;

ret = gpiochip_add(&chip->gpio_chip);
if (ret)
- goto out_failed_irq;
+ return ret;

if (pdata && pdata->setup) {
ret = pdata->setup(client, chip->gpio_chip.base,
@@ -784,12 +776,6 @@ static int pca953x_probe(struct i2c_client *client,

i2c_set_clientdata(client, chip);
return 0;
-
-out_failed_irq:
- pca953x_irq_teardown(chip);
-out_failed:
- kfree(chip);
- return ret;
}

static int pca953x_remove(struct i2c_client *client)
@@ -815,8 +801,6 @@ static int pca953x_remove(struct i2c_client *client)
return ret;
}

- pca953x_irq_teardown(chip);
- kfree(chip);
return 0;
}

--
1.8.1


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