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gpio: lynxpoint: 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: Mathias Nyman <mathias.nyman@linux.intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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1 changed files with 22 additions and 0 deletions
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@ -301,6 +301,26 @@ static void lp_irq_disable(struct irq_data *d)
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spin_unlock_irqrestore(&lg->lock, flags);
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spin_unlock_irqrestore(&lg->lock, flags);
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}
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}
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static unsigned int lp_irq_startup(struct irq_data *d)
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{
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struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
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if (gpio_lock_as_irq(&lg->chip, irqd_to_hwirq(d)))
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dev_err(lg->chip.dev,
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"unable to lock HW IRQ %lu for IRQ\n",
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irqd_to_hwirq(d));
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lp_irq_enable(d);
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return 0;
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}
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static void lp_irq_shutdown(struct irq_data *d)
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{
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struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
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lp_irq_disable(d);
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gpio_unlock_as_irq(&lg->chip, irqd_to_hwirq(d));
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}
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static struct irq_chip lp_irqchip = {
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static struct irq_chip lp_irqchip = {
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.name = "LP-GPIO",
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.name = "LP-GPIO",
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.irq_mask = lp_irq_mask,
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.irq_mask = lp_irq_mask,
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@ -308,6 +328,8 @@ static struct irq_chip lp_irqchip = {
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.irq_enable = lp_irq_enable,
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.irq_enable = lp_irq_enable,
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.irq_disable = lp_irq_disable,
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.irq_disable = lp_irq_disable,
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.irq_set_type = lp_irq_type,
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.irq_set_type = lp_irq_type,
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.irq_startup = lp_irq_startup,
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.irq_shutdown = lp_irq_shutdown,
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.flags = IRQCHIP_SKIP_SET_WAKE,
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.flags = IRQCHIP_SKIP_SET_WAKE,
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};
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};
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