From cf468880c37be1a7fea0a842a14ba1e1e388147c Mon Sep 17 00:00:00 2001
From: Wenyou Yang <wenyou.yang@atmel.com>
Date: Thu, 23 Mar 2017 12:46:20 +0800
Subject: [PATCH] gpio: at91_gpio: add the device tree support
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Add the device tree support.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>
---
 drivers/gpio/at91_gpio.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/gpio/at91_gpio.c b/drivers/gpio/at91_gpio.c
index 2f9e44b620..37955cc99a 100644
--- a/drivers/gpio/at91_gpio.c
+++ b/drivers/gpio/at91_gpio.c
@@ -572,14 +572,29 @@ static int at91_gpio_probe(struct udevice *dev)
 
 	uc_priv->bank_name = plat->bank_name;
 	uc_priv->gpio_count = GPIO_PER_BANK;
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+	plat->base_addr = (uint32_t)dev_get_addr_ptr(dev);
+#endif
 	port->regs = (struct at91_port *)plat->base_addr;
 
 	return 0;
 }
 
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static const struct udevice_id at91_gpio_ids[] = {
+	{ .compatible = "atmel,at91rm9200-gpio" },
+	{ }
+};
+#endif
+
 U_BOOT_DRIVER(gpio_at91) = {
 	.name	= "gpio_at91",
 	.id	= UCLASS_GPIO,
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+	.of_match = at91_gpio_ids,
+	.platdata_auto_alloc_size = sizeof(struct at91_port_platdata),
+#endif
 	.ops	= &gpio_at91_ops,
 	.probe	= at91_gpio_probe,
 	.priv_auto_alloc_size = sizeof(struct at91_port_priv),
-- 
2.39.5