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path: root/drivers/gpio/stmpe-gpio.c
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Diffstat (limited to 'drivers/gpio/stmpe-gpio.c')
-rw-r--r--drivers/gpio/stmpe-gpio.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/gpio/stmpe-gpio.c b/drivers/gpio/stmpe-gpio.c
index 4e1f1b9d5e67..7c9e6a052c45 100644
--- a/drivers/gpio/stmpe-gpio.c
+++ b/drivers/gpio/stmpe-gpio.c
@@ -30,6 +30,7 @@ struct stmpe_gpio {
struct mutex irq_lock;
int irq_base;
+ unsigned norequest_mask;
/* Caches of interrupt control registers for bus_lock */
u8 regs[CACHE_NR_REGS][CACHE_NR_BANKS];
@@ -103,6 +104,9 @@ static int stmpe_gpio_request(struct gpio_chip *chip, unsigned offset)
struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(chip);
struct stmpe *stmpe = stmpe_gpio->stmpe;
+ if (stmpe_gpio->norequest_mask & (1 << offset))
+ return -EINVAL;
+
return stmpe_set_altfunc(stmpe, 1 << offset, STMPE_BLOCK_GPIO);
}
@@ -287,8 +291,6 @@ static int __devinit stmpe_gpio_probe(struct platform_device *pdev)
int irq;
pdata = stmpe->pdata->gpio;
- if (!pdata)
- return -ENODEV;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
@@ -302,6 +304,7 @@ static int __devinit stmpe_gpio_probe(struct platform_device *pdev)
stmpe_gpio->dev = &pdev->dev;
stmpe_gpio->stmpe = stmpe;
+ stmpe_gpio->norequest_mask = pdata ? pdata->norequest_mask : 0;
stmpe_gpio->chip = template_chip;
stmpe_gpio->chip.ngpio = stmpe->num_gpios;
@@ -312,11 +315,11 @@ static int __devinit stmpe_gpio_probe(struct platform_device *pdev)
ret = stmpe_enable(stmpe, STMPE_BLOCK_GPIO);
if (ret)
- return ret;
+ goto out_free;
ret = stmpe_gpio_irq_init(stmpe_gpio);
if (ret)
- goto out_free;
+ goto out_disable;
ret = request_threaded_irq(irq, NULL, stmpe_gpio_irq, IRQF_ONESHOT,
"stmpe-gpio", stmpe_gpio);
@@ -342,6 +345,8 @@ out_freeirq:
free_irq(irq, stmpe_gpio);
out_removeirq:
stmpe_gpio_irq_remove(stmpe_gpio);
+out_disable:
+ stmpe_disable(stmpe, STMPE_BLOCK_GPIO);
out_free:
kfree(stmpe_gpio);
return ret;