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Commit f6f29311 authored by Linus Walleij's avatar Linus Walleij
Browse files

gpio: pl061: lock IRQs when starting them 



This uses the new API for tagging GPIO lines as in use by
IRQs. This enforces a few semantic checks on how the underlying
GPIO line is used.

Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: Deepak Sikri <deepak.sikri@st.com>
Acked-by: default avatarBaruch Siach <baruch@tkos.co.il>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 7808755d

drivers/gpio/gpio-pl061.c

+22 −0
Original line number Diff line number Diff line
@@ -231,11 +231,33 @@ static void pl061_irq_unmask(struct irq_data *d) 
	spin_unlock(&chip->lock);

}



static unsigned int pl061_irq_startup(struct irq_data *d)

{

	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);



	if (gpio_lock_as_irq(&chip->gc, irqd_to_hwirq(d)))

		dev_err(chip->gc.dev,

			"unable to lock HW IRQ %lu for IRQ\n",

			irqd_to_hwirq(d));

	pl061_irq_unmask(d);

	return 0;

}



static void pl061_irq_shutdown(struct irq_data *d)

{

	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);



	pl061_irq_mask(d);

	gpio_unlock_as_irq(&chip->gc, irqd_to_hwirq(d));

}



static struct irq_chip pl061_irqchip = {

	.name		= "pl061 gpio",

	.irq_mask	= pl061_irq_mask,

	.irq_unmask	= pl061_irq_unmask,

	.irq_set_type	= pl061_irq_type,

	.irq_startup	= pl061_irq_startup,

	.irq_shutdown	= pl061_irq_shutdown,

};



static int pl061_irq_map(struct irq_domain *d, unsigned int irq,