openwrt/target/linux/ar71xx/patches-4.1/811-MIPS-ath79-gpio-enable-set-direction.patch

--- a/arch/mips/ath79/common.h
+++ b/arch/mips/ath79/common.h
@@ -28,6 +28,7 @@ void ath79_gpio_function_enable(u32 mask
 void ath79_gpio_function_disable(u32 mask);
 void ath79_gpio_function_setup(u32 set, u32 clear);
 void ath79_gpio_output_select(unsigned gpio, u8 val);
+int ath79_gpio_direction_select(unsigned gpio, bool oe);
 void ath79_gpio_init(void);
 
 #endif /* __ATH79_COMMON_H */
--- a/arch/mips/ath79/gpio.c
+++ b/arch/mips/ath79/gpio.c
@@ -142,6 +142,30 @@ static int ar934x_gpio_direction_output(
 	return 0;
 }
 
+int ath79_gpio_direction_select(unsigned gpio, bool oe)
+{
+	void __iomem *base = ath79_gpio_base;
+	unsigned long flags;
+	bool ieq_1 = (soc_is_ar934x() ||
+			soc_is_qca953x());
+
+	if (gpio >= ath79_gpio_count)
+		return -1;
+
+	spin_lock_irqsave(&ath79_gpio_lock, flags);
+
+	if ((ieq_1 && oe) || (!ieq_1 && !oe))
+		__raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) & ~(1 << gpio),
+				base + AR71XX_GPIO_REG_OE);
+	else
+		__raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) | (1 << gpio),
+				base + AR71XX_GPIO_REG_OE);
+
+	spin_unlock_irqrestore(&ath79_gpio_lock, flags);
+
+	return 0;
+}
+
 static struct gpio_chip ath79_gpio_chip = {
 	.label			= "ath79",
 	.get			= ath79_gpio_get_value,