On Fri, Oct 4, 2019 at 2:29 PM Amelie Delaunay <amelie.delau...@st.com> wrote:
> 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.delau...@st.com>
OK I see what you want to achieve.
> +static int stmfx_gpio_irq_request_resources(struct irq_data *data)
> +{
> + struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data);
> + struct stmfx_pinctrl *pctl = gpiochip_get_data(gpio_chip);
> + int ret;
> +
> + ret = stmfx_gpio_direction_input(&pctl->gpio_chip, data->hwirq);
> + if (ret)
> + return ret;
> +
> + ret = gpiochip_lock_as_irq(&pctl->gpio_chip, data->hwirq);
> + if (ret) {
> + dev_err(pctl->dev, "Unable to lock gpio %lu as IRQ: %d\n",
> + data->hwirq, ret);
> + return ret;
> + }
> +
> + return 0;
> +}
Just call gpiochip_reqres_irq() instead of calling the lock etc
explicitly.
> +static void stmfx_gpio_irq_release_resources(struct irq_data *data)
> +{
> + struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data);
> + struct stmfx_pinctrl *pctl = gpiochip_get_data(gpio_chip);
> +
> + gpiochip_unlock_as_irq(&pctl->gpio_chip, data->hwirq);
> +}
Just call gpiochip_relres_irq()
But all this duplicated a lot of code from the core which is not so nice.
> @@ -678,6 +706,8 @@ 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;
What about just adding
pctl->irq_chip.irq_enable and do stmfx_gpio_direction_input()
in that callback instead? gpiolib will helpfully wrap it.
Yours,
Linus Walleij
