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Commit db6b3ad1 authored by Linus Walleij's avatar Linus Walleij
Browse files

gpio: bcm-kona: 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: Christian Daudt <csd@broadcom.com>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: default avatarMarkus Mayer <markus.mayer@linaro.org>
Tested-by: default avatarMarkus Mayer <markus.mayer@linaro.org>
Reviewed-by: default avatarJavier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent f41cd3c2

drivers/gpio/gpio-bcm-kona.c

+22 −0
Original line number Diff line number Diff line
@@ -449,12 +449,34 @@ static void bcm_kona_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) 
	chained_irq_exit(chip, desc);

}



static unsigned int bcm_kona_gpio_irq_startup(struct irq_data *d)

{

	struct bcm_kona_gpio *kona_gpio = irq_data_get_irq_chip_data(d);



	if (gpio_lock_as_irq(&kona_gpio->gpio_chip, d->hwirq))

		dev_err(kona_gpio->gpio_chip.dev,

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

			d->hwirq);

	bcm_kona_gpio_irq_unmask(d);

	return 0;

}



static void bcm_kona_gpio_irq_shutdown(struct irq_data *d)

{

	struct bcm_kona_gpio *kona_gpio = irq_data_get_irq_chip_data(d);



	bcm_kona_gpio_irq_mask(d);

	gpio_unlock_as_irq(&kona_gpio->gpio_chip, d->hwirq);

}



static struct irq_chip bcm_gpio_irq_chip = {

	.name = "bcm-kona-gpio",

	.irq_ack = bcm_kona_gpio_irq_ack,

	.irq_mask = bcm_kona_gpio_irq_mask,

	.irq_unmask = bcm_kona_gpio_irq_unmask,

	.irq_set_type = bcm_kona_gpio_irq_set_type,

	.irq_startup = bcm_kona_gpio_irq_startup,

	.irq_shutdown = bcm_kona_gpio_irq_shutdown,

};



static struct __initconst of_device_id bcm_kona_gpio_of_match[] = {