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--- a/arch/mips/ath79/dev-common.c
+++ b/arch/mips/ath79/dev-common.c
@@ -87,6 +87,15 @@ void __init ath79_register_uart(void)
if (IS_ERR(clk))
panic("unable to get UART clock, err=%ld", PTR_ERR(clk));
+ if (soc_is_ar71xx())
+ ath79_gpio_function_enable(AR71XX_GPIO_FUNC_UART_EN);
+ else if (soc_is_ar724x())
+ ath79_gpio_function_enable(AR724X_GPIO_FUNC_UART_EN);
+ else if (soc_is_ar913x())
+ ath79_gpio_function_enable(AR913X_GPIO_FUNC_UART_EN);
+ else if (soc_is_ar933x())
+ ath79_gpio_function_enable(AR933X_GPIO_FUNC_UART_EN);
+
if (soc_is_ar71xx() ||
soc_is_ar724x() ||
soc_is_ar913x() ||
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