-
-int peripheral_request(unsigned short per, const char *label)
-{
- unsigned long flags;
- unsigned short ident = P_IDENT(per);
-
- /*
- * Don't cares are pins with only one dedicated function
- */
-
- if (per & P_DONTCARE)
- return 0;
-
- if (!(per & P_DEFINED))
- return -ENODEV;
-
- local_irq_save(flags);
-
- if (!check_gpio(ident)) {
-
- if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
- dump_stack();
- printk(KERN_ERR
- "%s: Peripheral %d is already reserved as GPIO by %s !\n",
- __func__, ident, get_label(ident));
- local_irq_restore(flags);
- return -EBUSY;
- }
-
- }
-
- if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
-
- /*
- * Pin functions like AMC address strobes my
- * be requested and used by several drivers
- */
-
- if (!(per & P_MAYSHARE)) {
-
- /*
- * Allow that the identical pin function can
- * be requested from the same driver twice
- */
-
- if (cmp_label(ident, label) == 0)
- goto anyway;
-
- dump_stack();
- printk(KERN_ERR
- "%s: Peripheral %d function %d is already"
- " reserved by %s !\n",
- __func__, ident, P_FUNCT2MUX(per),
- get_label(ident));
- local_irq_restore(flags);
- return -EBUSY;
- }
-
- }
-
- anyway: