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MIPS: VR41xx: Mark GPIO lines used for IRQ 

When an IRQ is started on a GPIO line, mark this GPIO as IRQ in
the gpiolib so we can keep track of the usage centrally.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: linux-gpio@vger.kernel.org
Cc: Alexandre Courbot <acourbot@nvidia.com>
Patchwork: https://patchwork.linux-mips.org/patch/6417/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Linus Walleij 2014-01-24 00:07:57 +01:00 committed by Ralf Baechle
parent dab75dd956
commit 40d4d3319f
1 changed files with 20 additions and 0 deletions
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20
drivers/gpio/gpio-vr41xx.c
View File

@ -81,6 +81,7 @@ static DEFINE_SPINLOCK(giu_lock);
static unsigned long giu_flags;
static void __iomem *giu_base;
static struct gpio_chip vr41xx_gpio_chip;
#define giu_read(offset) readw(giu_base + (offset))
#define giu_write(offset, value) writew((value), giu_base + (offset))
@ -135,12 +136,31 @@ static void unmask_giuint_low(struct irq_data *d)
giu_set(GIUINTENL, 1 << GPIO_PIN_OF_IRQ(d->irq));
}
static unsigned int startup_giuint(struct irq_data *data)
{
if (gpio_lock_as_irq(&vr41xx_gpio_chip, data->hwirq))
dev_err(vr41xx_gpio_chip.dev,
"unable to lock HW IRQ %lu for IRQ\n",
data->hwirq);
/* Satisfy the .enable semantics by unmasking the line */
unmask_giuint_low(data);
return 0;
}
static void shutdown_giuint(struct irq_data *data)
{
mask_giuint_low(data);
gpio_unlock_as_irq(&vr41xx_gpio_chip, data->hwirq);
}
static struct irq_chip giuint_low_irq_chip = {
.name = "GIUINTL",
.irq_ack = ack_giuint_low,
.irq_mask = mask_giuint_low,
.irq_mask_ack = mask_ack_giuint_low,
.irq_unmask = unmask_giuint_low,
.irq_startup = startup_giuint,
.irq_shutdown = shutdown_giuint,
};
static void ack_giuint_high(struct irq_data *d)