dbg_dev_printf
dbg_dev_printf(dev, "failed to read from device: %d\n",
dbg_dev_printf(dev, "failed to write to device: %d\n",
dbg_dev_printf(dev, "failed to read from device: %d\n", error);
dbg_dev_printf(dev, "failed to write to device: %d\n", error);
dbg_dev_printf(dev, "failed to write to device: %d\n", error);
dbg_dev_printf(dev, "Reading pin %u pvalue.", pin);
dbg_dev_printf(dev, "Setting pin: %u to %u\n", pin, val);
dbg_dev_printf(dev, "Failed to read from register.\n");
dbg_dev_printf(dev, "Could not write to register.\n");
dbg_dev_printf(dev, "Toggling pin: %d\n", pin);
dbg_dev_printf(dev, "Cannot read from register.\n");
dbg_dev_printf(dev, "Cannot write to register.\n");