MAC_PINMUX_CFG
tmp_u1b = rtl_read_byte(rtlpriv, MAC_PINMUX_CFG);
rtl_write_byte(rtlpriv, MAC_PINMUX_CFG, tmp_u1b & (~BIT(3)));
rtl_write_byte(rtlpriv, MAC_PINMUX_CFG, (GPIOMUX_EN | GPIOSEL_GPIO));
rtl_write_byte(rtlpriv, MAC_PINMUX_CFG, (GPIOMUX_EN | GPIOSEL_GPIO));