openwrt/target/linux/ar71xx/patches-4.14/632-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
@@ -83,3 +83,19 @@ void __init ath79_gpio_output_select(uns
 	/* flush write */
 	(void) __raw_readl(base + reg);
 }
+
+int ath79_gpio_direction_select(unsigned gpio, bool oe)
+{
+	void __iomem *base = ath79_gpio_base;
+	bool ieq_1 = (soc_is_ar934x() ||
+			soc_is_qca953x());
+
+	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);
+
+	return 0;
+}