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.
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
It would be much appreciated if one of the MIPS people could
test this patch, thanks in advance. (I did compile-test it
with a MIPS cross compiler.)
---
drivers/gpio/gpio-vr41xx.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/gpio/gpio-vr41xx.c b/drivers/gpio/gpio-vr41xx.c
index b983bc079102..c6728cee0cfd 100644
--- a/drivers/gpio/gpio-vr41xx.c
+++ b/drivers/gpio/gpio-vr41xx.c
@@ -80,6 +80,7 @@ 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))
@@ -134,12 +135,31 @@ 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)
--
1.8.4.2
