gpio: sim: lock GPIOs as interrupts when they are requested

Use the extended irq_sim interface to supply the simulated interrupt
domain with callbacks allowing the GPIO sim to lock/unlock GPIOs
requested as interrupts.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240624093934.17089-3-brgl@bgdev.pl
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

diff --git a/drivers/gpio/gpio-sim.c b/drivers/gpio/gpio-sim.c
index 4157735ea7910c597c35739b3c3d69bd72b10a54..dcca1d7f173e5f186219aa2897dfc0be50a3d2b2 100644 (file)
--- a/drivers/gpio/gpio-sim.c
+++ b/drivers/gpio/gpio-sim.c
@@ -227,6 +227,27 @@ static void gpio_sim_free(struct gpio_chip *gc, unsigned int offset)
        }
 }
 
+static int gpio_sim_irq_requested(struct irq_domain *domain,
+                                 irq_hw_number_t hwirq, void *data)
+{
+       struct gpio_sim_chip *chip = data;
+
+       return gpiochip_lock_as_irq(&chip->gc, hwirq);
+}
+
+static void gpio_sim_irq_released(struct irq_domain *domain,
+                                 irq_hw_number_t hwirq, void *data)
+{
+       struct gpio_sim_chip *chip = data;
+
+       gpiochip_unlock_as_irq(&chip->gc, hwirq);
+}
+
+static const struct irq_sim_ops gpio_sim_irq_sim_ops = {
+       .irq_sim_irq_requested = gpio_sim_irq_requested,
+       .irq_sim_irq_released = gpio_sim_irq_released,
+};
+
 static void gpio_sim_dbg_show(struct seq_file *seq, struct gpio_chip *gc)
 {
        struct gpio_sim_chip *chip = gpiochip_get_data(gc);
@@ -443,7 +464,9 @@ static int gpio_sim_add_bank(struct fwnode_handle *swnode, struct device *dev)
        if (!chip->pull_map)
                return -ENOMEM;
 
-       chip->irq_sim = devm_irq_domain_create_sim(dev, swnode, num_lines);
+       chip->irq_sim = devm_irq_domain_create_sim_full(dev, swnode, num_lines,
+                                                       &gpio_sim_irq_sim_ops,
+                                                       chip);
        if (IS_ERR(chip->irq_sim))
                return PTR_ERR(chip->irq_sim);