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pinctrl: stmfx: add irq_request/release_resources callbacks 

When an STMFX IO is used as interrupt through the interrupt-controller
binding, the STMFX driver should configure this IO as input. Default
value of STMFX IO direction is input, but if the IO is used as output
before the interrupt use, it will not work without these callbacks.

Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Link: https://lore.kernel.org/r/20191009091606.17283-1-amelie.delaunay@st.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Amelie Delaunay 2019-10-09 11:16:06 +02:00 committed by Linus Walleij
parent bcd11493f0
commit f086d1fe06
1 changed files with 21 additions and 0 deletions
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21
drivers/pinctrl/pinctrl-stmfx.c
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@ -505,6 +505,25 @@ static void stmfx_pinctrl_irq_bus_sync_unlock(struct irq_data *data)
mutex_unlock(&pctl->lock);
}
static int stmfx_gpio_irq_request_resources(struct irq_data *data)
{
struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data);
int ret;
ret = stmfx_gpio_direction_input(gpio_chip, data->hwirq);
if (ret)
return ret;
return gpiochip_reqres_irq(gpio_chip, data->hwirq);
}
static void stmfx_gpio_irq_release_resources(struct irq_data *data)
{
struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data);
return gpiochip_relres_irq(gpio_chip, data->hwirq);
}
static void stmfx_pinctrl_irq_toggle_trigger(struct stmfx_pinctrl *pctl,
unsigned int offset)
{
@ -678,6 +697,8 @@ static int stmfx_pinctrl_probe(struct platform_device *pdev)
pctl->irq_chip.irq_set_type = stmfx_pinctrl_irq_set_type;
pctl->irq_chip.irq_bus_lock = stmfx_pinctrl_irq_bus_lock;
pctl->irq_chip.irq_bus_sync_unlock = stmfx_pinctrl_irq_bus_sync_unlock;
pctl->irq_chip.irq_request_resources = stmfx_gpio_irq_request_resources;
pctl->irq_chip.irq_release_resources = stmfx_gpio_irq_release_resources;
ret = gpiochip_irqchip_add_nested(&pctl->gpio_chip, &pctl->irq_chip,
0, handle_bad_irq, IRQ_TYPE_NONE);