diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 8 | ||||
| -rw-r--r-- | drivers/gpio/langwell_gpio.c | 11 |
2 files changed, 5 insertions, 14 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 662ed92..50de0f5 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -661,7 +661,7 @@ int gpio_export(unsigned gpio, bool direction_may_change) dev = device_create(&gpio_class, desc->chip->dev, MKDEV(0, 0), desc, ioname ? ioname : "gpio%d", gpio); - if (dev) { + if (!IS_ERR(dev)) { if (direction_may_change) status = sysfs_create_group(&dev->kobj, &gpio_attr_group); @@ -679,7 +679,7 @@ int gpio_export(unsigned gpio, bool direction_may_change) if (status != 0) device_unregister(dev); } else - status = -ENODEV; + status = PTR_ERR(dev); if (status == 0) set_bit(FLAG_EXPORT, &desc->flags); } @@ -800,11 +800,11 @@ static int gpiochip_export(struct gpio_chip *chip) mutex_lock(&sysfs_lock); dev = device_create(&gpio_class, chip->dev, MKDEV(0, 0), chip, "gpiochip%d", chip->base); - if (dev) { + if (!IS_ERR(dev)) { status = sysfs_create_group(&dev->kobj, &gpiochip_attr_group); } else - status = -ENODEV; + status = PTR_ERR(dev); chip->exported = (status == 0); mutex_unlock(&sysfs_lock); diff --git a/drivers/gpio/langwell_gpio.c b/drivers/gpio/langwell_gpio.c index 5711ce5..4baf3d7 100644 --- a/drivers/gpio/langwell_gpio.c +++ b/drivers/gpio/langwell_gpio.c @@ -144,13 +144,6 @@ static int lnw_irq_type(unsigned irq, unsigned type) static void lnw_irq_unmask(unsigned irq) { - struct lnw_gpio *lnw = get_irq_chip_data(irq); - u32 gpio = irq - lnw->irq_base; - u8 reg = gpio / 32; - void __iomem *gedr; - - gedr = (void __iomem *)(&lnw->reg_base->GEDR[reg]); - writel(BIT(gpio % 32), gedr); }; static void lnw_irq_mask(unsigned irq) @@ -183,13 +176,11 @@ static void lnw_irq_handler(unsigned irq, struct irq_desc *desc) gedr_v = readl(gedr); if (!gedr_v) continue; - for (gpio = reg*32; gpio < reg*32+32; gpio++) { - gedr_v = readl(gedr); + for (gpio = reg*32; gpio < reg*32+32; gpio++) if (gedr_v & BIT(gpio % 32)) { pr_debug("pin %d triggered\n", gpio); generic_handle_irq(lnw->irq_base + gpio); } - } /* clear the edge detect status bit */ writel(gedr_v, gedr); } |