sunxi: axp: Add driver-model support to the axp_gpio code

Add driver-model support to the axp_gpio code, note that this needs a small
tweak to the driver-model version of sunxi_name_to_gpio to deal with the
vbus detect and enable pins which are not standard numbered gpios.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/drivers/gpio/sunxi_gpio.c b/drivers/gpio/sunxi_gpio.c
index 5a0b5e4..21c3ff1 100644
--- a/drivers/gpio/sunxi_gpio.c
+++ b/drivers/gpio/sunxi_gpio.c
@@ -172,7 +172,19 @@
 {
 	unsigned int gpio;
 	int ret;
+#if !defined CONFIG_SPL_BUILD && defined CONFIG_AXP_GPIO
+	char lookup[8];
 
+	if (strcasecmp(name, "AXP0-VBUS-DETECT") == 0) {
+		sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
+			SUNXI_GPIO_AXP0_VBUS_DETECT);
+		name = lookup;
+	} else if (strcasecmp(name, "AXP0-VBUS-ENABLE") == 0) {
+		sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
+			SUNXI_GPIO_AXP0_VBUS_ENABLE);
+		name = lookup;
+	}
+#endif
 	ret = gpio_lookup_name(name, NULL, NULL, &gpio);
 
 	return ret ? ret : gpio;