ramips: fix PCIe reset GPIOs for ipTIME A8004T

The ipTIME A8004T requires GPIO19 and GPIO8 for PCIe reset control.

GPIO8 is assigned to UART3 by default, so configure the pin state
to make it available as a GPIO and add both GPIOs to the PCIe
reset-gpios property.

This fixes PCIe initialization after warm reboot.

Signed-off-by: Myeongjae SONG <devparlair@outlook.com>
Link: https://github.com/openwrt/openwrt/pull/24534
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>

diff --git a/target/linux/ramips/dts/mt7621_iptime_a8004t.dts b/target/linux/ramips/dts/mt7621_iptime_a8004t.dts
index 7f28d7af3fb5f820e08f18c60cfe7e7e5bd69755..93eab2acd21d8471de5efc274376522545610796 100644 (file)
--- a/target/linux/ramips/dts/mt7621_iptime_a8004t.dts
+++ b/target/linux/ramips/dts/mt7621_iptime_a8004t.dts
@@ -168,6 +168,9 @@
 
 &pcie {
        status = "okay";
+
+       reset-gpios = <&gpio 19 GPIO_ACTIVE_LOW>,
+                       <&gpio 8 GPIO_ACTIVE_LOW>;
 };
 
 &pcie0 {
@@ -192,7 +195,7 @@
 
 &state_default {
        gpio {
-               groups = "wdt", "jtag", "i2c";
+               groups = "wdt", "jtag", "i2c", "uart3";
                function = "gpio";
        };
 };