+
+int bcm2835_gpio_get_func_id(struct udevice *dev, unsigned gpio)
+{
+ struct bcm2835_gpios *gpios = dev_get_priv(dev);
+ u32 val;
+
+ val = readl(&gpios->reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
+
+ return (val >> BCM2835_GPIO_FSEL_SHIFT(gpio) & BCM2835_GPIO_FSEL_MASK);
+}
+
+static int bcm2835_gpio_get_function(struct udevice *dev, unsigned offset)
+{
+ int funcid = bcm2835_gpio_get_func_id(dev, offset);
+
+ switch (funcid) {
+ case BCM2835_GPIO_OUTPUT:
+ return GPIOF_OUTPUT;
+ case BCM2835_GPIO_INPUT:
+ return GPIOF_INPUT;
+ default:
+ return GPIOF_FUNC;
+ }
+}
+
+
+static const struct dm_gpio_ops gpio_bcm2835_ops = {
+ .direction_input = bcm2835_gpio_direction_input,
+ .direction_output = bcm2835_gpio_direction_output,
+ .get_value = bcm2835_gpio_get_value,
+ .set_value = bcm2835_gpio_set_value,
+ .get_function = bcm2835_gpio_get_function,
+};
+
+static int bcm2835_gpio_probe(struct udevice *dev)
+{
+ struct bcm2835_gpios *gpios = dev_get_priv(dev);
+ struct bcm2835_gpio_platdata *plat = dev_get_platdata(dev);
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+
+ uc_priv->bank_name = "GPIO";
+ uc_priv->gpio_count = BCM2835_GPIO_COUNT;
+ gpios->reg = (struct bcm2835_gpio_regs *)plat->base;
+
+ return 0;
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static const struct udevice_id bcm2835_gpio_id[] = {
+ {.compatible = "brcm,bcm2835-gpio"},
+ {}
+};
+
+static int bcm2835_gpio_ofdata_to_platdata(struct udevice *dev)
+{
+ struct bcm2835_gpio_platdata *plat = dev_get_platdata(dev);
+ fdt_addr_t addr;
+
+ addr = devfdt_get_addr(dev);
+ if (addr == FDT_ADDR_T_NONE)
+ return -EINVAL;
+
+ plat->base = addr;
+ return 0;
+}
+#endif
+
+U_BOOT_DRIVER(gpio_bcm2835) = {
+ .name = "gpio_bcm2835",
+ .id = UCLASS_GPIO,
+ .of_match = of_match_ptr(bcm2835_gpio_id),
+ .ofdata_to_platdata = of_match_ptr(bcm2835_gpio_ofdata_to_platdata),
+ .platdata_auto_alloc_size = sizeof(struct bcm2835_gpio_platdata),
+ .ops = &gpio_bcm2835_ops,
+ .probe = bcm2835_gpio_probe,
+ .flags = DM_FLAG_PRE_RELOC,
+ .priv_auto_alloc_size = sizeof(struct bcm2835_gpios),
+};