I've i2c gpio expander (pca953x) IRQ attached to pin SYS_NIRQ/GPIO_0 (am3517).
How can I declare this pin as GPIO and later as IRQ?
if (!gpio)
return -EINVAL;
list_for_each_entry(e, muxmodes, node) {
struct omap_mux *m = &e->mux;
if (gpio == m->gpio) {
gpio_mux = m;
found++;
}
}
if (found == 0) {
pr_err("%s: Could not set gpio%i\n", __func__, gpio);
return -ENODEV;
}
if (found > 1) {
pr_info("%s: Multiple gpio paths (%d) for gpio%i\n", __func__,
found, gpio);
return -EINVAL;
}
with this semantic in arch/arm/mach-omap2/mux.c it is not possible and if I
comment the first constraint I get "Multiple gpio paths" error, because found
== 5.
Yegor
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