+ /* The gpio banks conceptually expose a segmented bitmap,
+ * and "ngpio" is one more than the largest zero-based
+ * bit index that's valid.
+ */
+ if (cpu_is_davinci_dm355()) { /* or dm335() */
+ ngpio = 104;
+ } else if (cpu_is_davinci_dm644x()) { /* or dm337() */
+ ngpio = 71;
+ } else if (cpu_is_davinci_dm646x()) {
+ /* NOTE: each bank has several "reserved" bits,
+ * unusable as GPIOs. Only 33 of the GPIO numbers
+ * are usable, and we're not rejecting the others.
+ */
+ ngpio = 43;
+ } else {
+ /* if cpu_is_davinci_dm643x() ngpio = 111 */
+ pr_err("GPIO setup: how many GPIOs?\n");
+ return -EINVAL;
+ }
+
+ if (WARN_ON(DAVINCI_N_GPIO < ngpio))
+ ngpio = DAVINCI_N_GPIO;
+
+ for (i = 0, base = 0; base < ngpio; i++, base += 32) {