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>

arch/arm/include/asm/arch-sunxi/gpio.h

@@ -203,8 +203,10 @@ enum sunxi_gpio_number {
 #define SUNXI_GPIO_PULL_DOWN	2
 
 /* Virtual AXP0 GPIOs */
-#define SUNXI_GPIO_AXP0_VBUS_DETECT	8
-#define SUNXI_GPIO_AXP0_VBUS_ENABLE	9
+#define SUNXI_GPIO_AXP0_PREFIX "AXP0-"
+#define SUNXI_GPIO_AXP0_VBUS_DETECT	4
+#define SUNXI_GPIO_AXP0_VBUS_ENABLE	5
+#define SUNXI_GPIO_AXP0_GPIO_COUNT	6
 
 void sunxi_gpio_set_cfgbank(struct sunxi_gpio *pio, int bank_offset, u32 val);
 void sunxi_gpio_set_cfgpin(u32 pin, u32 val);

drivers/gpio/axp_gpio.c

@@ -9,6 +9,11 @@
 #include <common.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/pmic_bus.h>
+#include <asm/gpio.h>
+#include <dm.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <dm/root.h>
 #include <errno.h>
 
 #ifdef CONFIG_AXP152_POWER
@@ -135,13 +140,48 @@ int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val)
 	}
 }
 
+#ifdef CONFIG_DM_GPIO
+static const struct dm_gpio_ops gpio_axp_ops = {
+	.direction_input	= axp_gpio_direction_input,
+	.direction_output	= axp_gpio_direction_output,
+	.get_value		= axp_gpio_get_value,
+	.set_value		= axp_gpio_set_value,
+};
+
+static int gpio_axp_probe(struct udevice *dev)
+{
+	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+
+	/* Tell the uclass how many GPIOs we have */
+	uc_priv->bank_name = strdup(SUNXI_GPIO_AXP0_PREFIX);
+	uc_priv->gpio_count = SUNXI_GPIO_AXP0_GPIO_COUNT;
+
+	return 0;
+}
+
+U_BOOT_DRIVER(gpio_axp) = {
+	.name	= "gpio_axp",
+	.id	= UCLASS_GPIO,
+	.ops	= &gpio_axp_ops,
+	.probe	= gpio_axp_probe,
+};
+#endif
+
 int axp_gpio_init(void)
 {
+	__maybe_unused struct udevice *dev;
 	int ret;
 
 	ret = pmic_bus_init();
 	if (ret)
 		return ret;
 
+#ifdef CONFIG_DM_GPIO
+	/* There is no devicetree support for the axp yet, so bind directly */
+	ret = device_bind_driver(dm_root(), "gpio_axp", "AXP-gpio", &dev);
+	if (ret)
+		return ret;
+#endif
+
 	return 0;
 }

drivers/gpio/sunxi_gpio.c

@@ -172,7 +172,19 @@ int sunxi_name_to_gpio(const char *name)
 {
 	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;