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Commit 40d4d331 authored by Linus Walleij's avatar Linus Walleij Committed by Ralf Baechle
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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: default avatarLinus 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: default avatarRalf Baechle <ralf@linux-mips.org>
parent dab75dd9

drivers/gpio/gpio-vr41xx.c

+20 −0
Original line number Diff line number Diff line
@@ -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)