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pinctrl: stm32: set pin to gpio input when used as interrupt

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This patch ensures that pin is correctly set as gpio input when it is used
as an interrupt.

Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Alexandre TORGUE 2017-05-29 18:17:31 +02:00 committed by Linus Walleij
parent adeac77549
commit 9efa6d1a1e
1 changed files with 29 additions and 10 deletions
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39
drivers/pinctrl/stm32/pinctrl-stm32.c
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@ -219,12 +219,41 @@ static const struct gpio_chip stm32_gpio_template = {
.to_irq = stm32_gpio_to_irq,
};
static int stm32_gpio_irq_request_resources(struct irq_data *irq_data)
{
struct stm32_gpio_bank *bank = irq_data->domain->host_data;
struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
int ret;
ret = stm32_gpio_direction_input(&bank->gpio_chip, irq_data->hwirq);
if (ret)
return ret;
ret = gpiochip_lock_as_irq(&bank->gpio_chip, irq_data->hwirq);
if (ret) {
dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n",
irq_data->hwirq);
return ret;
}
return 0;
}
static void stm32_gpio_irq_release_resources(struct irq_data *irq_data)
{
struct stm32_gpio_bank *bank = irq_data->domain->host_data;
gpiochip_unlock_as_irq(&bank->gpio_chip, irq_data->hwirq);
}
static struct irq_chip stm32_gpio_irq_chip = {
.name = "stm32gpio",
.irq_eoi = irq_chip_eoi_parent,
.irq_mask = irq_chip_mask_parent,
.irq_unmask = irq_chip_unmask_parent,
.irq_set_type = irq_chip_set_type_parent,
.irq_request_resources = stm32_gpio_irq_request_resources,
.irq_release_resources = stm32_gpio_irq_release_resources,
};
static int stm32_gpio_domain_translate(struct irq_domain *d,
@ -248,15 +277,6 @@ static void stm32_gpio_domain_activate(struct irq_domain *d,
struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
regmap_field_write(pctl->irqmux[irq_data->hwirq], bank->bank_nr);
gpiochip_lock_as_irq(&bank->gpio_chip, irq_data->hwirq);
}
static void stm32_gpio_domain_deactivate(struct irq_domain *d,
struct irq_data *irq_data)
{
struct stm32_gpio_bank *bank = d->host_data;
gpiochip_unlock_as_irq(&bank->gpio_chip, irq_data->hwirq);
}
static int stm32_gpio_domain_alloc(struct irq_domain *d,
@ -285,7 +305,6 @@ static const struct irq_domain_ops stm32_gpio_domain_ops = {
.alloc = stm32_gpio_domain_alloc,
.free = irq_domain_free_irqs_common,
.activate = stm32_gpio_domain_activate,
.deactivate = stm32_gpio_domain_deactivate,
};
/* Pinctrl functions */