[PATCH v2 1/3] pinctrl: stm32: set pin to gpio input when used as interrupt
Alexandre TORGUE
alexandre.torgue at st.com
Mon May 29 09:17:31 PDT 2017
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 at st.com>
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c
index d3c5f5d..5a15c7d 100644
--- a/drivers/pinctrl/stm32/pinctrl-stm32.c
+++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
@@ -219,12 +219,41 @@ static int stm32_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
.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 int stm32_gpio_domain_alloc(struct irq_domain *d,
.alloc = stm32_gpio_domain_alloc,
.free = irq_domain_free_irqs_common,
.activate = stm32_gpio_domain_activate,
- .deactivate = stm32_gpio_domain_deactivate,
};
/* Pinctrl functions */
--
1.9.1
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