[PATCH v2 1/5] arm64: dts: rockchip: enable PCIe on M.2 E key for Radxa ROCK 5A

[FUKAUMI Naoki <naoki@radxa.com>]

Enable pcie2x1l2 and related combphy/regulator routed to M.2 E key
connector on Radxa ROCK 5A.

Tested with Radxa Wireless Module A8:

$ lspci
0004:40:00.0 PCI bridge: Rockchip Electronics Co., Ltd RK3588 (rev 01)
0004:41:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8852BE PCIe 802.11ax Wireless Network Controller

$ ip l
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: end0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether c2:58:fc:70:55:86 brd ff:ff:ff:ff:ff:ff
3: wlP4p65s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 2c:05:47:65:5b:ed brd ff:ff:ff:ff:ff:ff

$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 001 Device 003: ID 0bda:b85b Realtek Semiconductor Corp. Bluetooth Radio
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 006 Device 002: ID 0789:0336 Logitec Corp. LMD USB Device
Bus 007 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 008 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

$ hciconfig
hci0:	Type: Primary  Bus: USB
	BD Address: 2C:05:47:65:5B:EE  ACL MTU: 1021:6  SCO MTU: 255:12
	UP RUNNING
	RX bytes:2698 acl:0 sco:0 events:329 errors:0
	TX bytes:69393 acl:0 sco:0 commands:329 errors:0

Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
Link: https://lore.kernel.org/r/20240826080456.525-1-naoki@radxa.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
(cherry picked from commit b728d4c51f0ce9207daf502f3a85073785c46319)
---
 .../src/arm64/rockchip/rk3588s-rock-5a.dts    | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/dts/upstream/src/arm64/rockchip/rk3588s-rock-5a.dts b/dts/upstream/src/arm64/rockchip/rk3588s-rock-5a.dts
index 03ed48246d36..a385e0991990 100644
--- a/dts/upstream/src/arm64/rockchip/rk3588s-rock-5a.dts
+++ b/dts/upstream/src/arm64/rockchip/rk3588s-rock-5a.dts
@@ -65,6 +65,18 @@
 		regulator-max-microvolt = <12000000>;
 	};
 
+	vcc3v3_wf: vcc3v3-wf-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc3v3_wf";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		enable-active-high;
+		gpio = <&gpio0 RK_PC5 GPIO_ACTIVE_HIGH>;
+		pinctrl-0 = <&pow_en>;
+		pinctrl-names = "default";
+		vin-supply = <&vcc5v0_sys>;
+	};
+
 	vcc5v0_host: vcc5v0-host-regulator {
 		compatible = "regulator-fixed";
 		regulator-name = "vcc5v0_host";
@@ -114,6 +126,10 @@
 	};
 };
 
+&combphy0_ps {
+	status = "okay";
+};
+
 &combphy2_psu {
 	status = "okay";
 };
@@ -293,6 +309,14 @@
 	};
 };
 
+&pcie2x1l2 {
+	pinctrl-0 = <&pcie20x1m0_pins>;
+	pinctrl-names = "default";
+	reset-gpios = <&gpio3 RK_PD1 GPIO_ACTIVE_HIGH>;
+	vpcie3v3-supply = <&vcc3v3_wf>;
+	status = "okay";
+};
+
 &pinctrl {
 	leds {
 		io_led: io-led {
@@ -300,6 +324,12 @@
 		};
 	};
 
+	pcie {
+		pow_en: pow-en {
+			rockchip,pins = <0 RK_PC5 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	power {
 		vcc_5v0_en: vcc-5v0-en {
 			rockchip,pins = <4 RK_PA3 RK_FUNC_GPIO &pcfg_pull_none>;
-- 
2.43.0