gpio/tc3589x: convert to use the simple irqdomain

The special checks for whether we have a base IRQ offset or not
is surplus if we use the simple IRQ domain. The IRQ offset
zero will be interpreted as a linear domain case.

Plus this makes sure we allocate descriptors where need be, or
warn if they are preallocated with SPARSE_IRQ.

Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-tc3589x.c b/drivers/gpio/gpio-tc3589x.c
index 1e48317e70fb045838b8053cc135055e7765c4ac..8c8447c7d2a8167bc2a9e6168e29f4a3151b29dd 100644 (file)
--- a/drivers/gpio/gpio-tc3589x.c
+++ b/drivers/gpio/gpio-tc3589x.c
@@ -292,17 +292,15 @@ static int tc3589x_gpio_irq_init(struct tc3589x_gpio *tc3589x_gpio,
 {
        int base = tc3589x_gpio->irq_base;
 
-       if (base) {
-               tc3589x_gpio->domain = irq_domain_add_legacy(
-                       NULL, tc3589x_gpio->chip.ngpio, base,
-                       0, &tc3589x_irq_ops, tc3589x_gpio);
-       }
-       else {
-               tc3589x_gpio->domain = irq_domain_add_linear(
-                       np, tc3589x_gpio->chip.ngpio,
-                       &tc3589x_irq_ops, tc3589x_gpio);
-       }
-
+       /*
+        * If this results in a linear domain, irq_create_mapping() will
+        * take care of allocating IRQ descriptors at runtime. When a base
+        * is provided, the IRQ descriptors will be allocated when the
+        * domain is instantiated.
+        */
+       tc3589x_gpio->domain = irq_domain_add_simple(np,
+                       tc3589x_gpio->chip.ngpio, base, &tc3589x_irq_ops,
+                       tc3589x_gpio);
        if (!tc3589x_gpio->domain) {
                dev_err(tc3589x_gpio->dev, "Failed to create irqdomain\n");
                return -ENOSYS;