[U-Boot] [PATCH 3/4] gpio: atmel: add gpio common API support

[Bo Shen]

add gpio common API support for gpio command

Signed-off-by: Bo Shen <voice.shen at atmel.com>
---
 drivers/gpio/at91_gpio.c |   43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/drivers/gpio/at91_gpio.c b/drivers/gpio/at91_gpio.c
index 15f396f..3de0844 100644
--- a/drivers/gpio/at91_gpio.c
+++ b/drivers/gpio/at91_gpio.c
@@ -363,3 +363,46 @@ int at91_get_pio_value(unsigned port, unsigned pin)
 
 	return pdsr != 0;
 }
+
+/* Common GPIO API */
+
+#define at91_gpio_to_port(gpio)		(gpio / 32)
+#define at91_gpio_to_pin(gpio)		(gpio % 32)
+
+int gpio_request(unsigned gpio, const char *label)
+{
+	return 0;
+}
+
+int gpio_free(unsigned gpio)
+{
+	return 0;
+}
+
+int gpio_direction_input(unsigned gpio)
+{
+	at91_set_pio_input(at91_gpio_to_port(gpio),
+			   at91_gpio_to_pin(gpio), 0);
+	return 0;
+}
+
+int gpio_direction_output(unsigned gpio, int value)
+{
+	at91_set_pio_output(at91_gpio_to_port(gpio),
+			    at91_gpio_to_pin(gpio), value);
+	return 0;
+}
+
+int gpio_get_value(unsigned gpio)
+{
+	return (int) at91_get_pio_value(at91_gpio_to_port(gpio),
+					at91_gpio_to_pin(gpio));
+}
+
+int gpio_set_value(unsigned gpio, int value)
+{
+	at91_set_pio_value(at91_gpio_to_port(gpio),
+			   at91_gpio_to_pin(gpio), value);
+
+	return 0;
+}
-- 
1.7.9.5