openwrt/target/linux/rockchip/patches-6.1/028-v6.6-arm64-dts-rockchip-Fix-PCIe-regulators-on-Radxa-E25.patch

From a87852e37f782257ebc57cc44a0d3fbf806471f6 Mon Sep 17 00:00:00 2001
From: Jonas Karlman <[email protected]>
Date: Mon, 24 Jul 2023 14:52:16 +0000
Subject: [PATCH] arm64: dts: rockchip: Fix PCIe regulators on Radxa E25

Despite its name, the regulator vcc3v3_pcie30x1 has nothing to do with
pcie30x1. Instead, it supply power to VBAT1-5 on the M.2 KEY B port as
seen on page 8 of the schematic [1].

pcie30x1 is used for the mini PCIe slot, and as seen on page 9 the
vcc3v3_minipcie regulator is instead related to pcie30x1.

The M.2 KEY B port can be used for WWAN USB2 modules or SATA drives.

Use correct regulator vcc3v3_minipcie for pcie30x1.

[1] https://dl.radxa.com/cm3p/e25/radxa-e25-v1.4-sch.pdf

Fixes: 2bf2f4d9f673 ("arm64: dts: rockchip: Add Radxa CM3I E25")
Signed-off-by: Jonas Karlman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Heiko Stuebner <[email protected]>
---
 .../arm64/boot/dts/rockchip/rk3568-radxa-e25.dts | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

--- a/arch/arm64/boot/dts/rockchip/rk3568-radxa-e25.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3568-radxa-e25.dts
@@ -47,6 +47,9 @@
 		vin-supply = <&vcc5v0_sys>;
 	};
 
+	/* actually fed by vcc5v0_sys, dependent
+	 * on pi6c clock generator
+	 */
 	vcc3v3_minipcie: vcc3v3-minipcie-regulator {
 		compatible = "regulator-fixed";
 		enable-active-high;
@@ -54,9 +57,9 @@
 		pinctrl-names = "default";
 		pinctrl-0 = <&minipcie_enable_h>;
 		regulator-name = "vcc3v3_minipcie";
-		regulator-min-microvolt = <5000000>;
-		regulator-max-microvolt = <5000000>;
-		vin-supply = <&vcc5v0_sys>;
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vcc3v3_pi6c_05>;
 	};
 
 	vcc3v3_ngff: vcc3v3-ngff-regulator {
@@ -71,9 +74,6 @@
 		vin-supply = <&vcc5v0_sys>;
 	};
 
-	/* actually fed by vcc5v0_sys, dependent
-	 * on pi6c clock generator
-	 */
 	vcc3v3_pcie30x1: vcc3v3-pcie30x1-regulator {
 		compatible = "regulator-fixed";
 		enable-active-high;
@@ -83,7 +83,7 @@
 		regulator-name = "vcc3v3_pcie30x1";
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
-		vin-supply = <&vcc3v3_pi6c_05>;
+		vin-supply = <&vcc5v0_sys>;
 	};
 
 	vcc3v3_pi6c_05: vcc3v3-pi6c-05-regulator {
@@ -117,7 +117,7 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&pcie30x1m0_pins>;
 	reset-gpios = <&gpio0 RK_PC3 GPIO_ACTIVE_HIGH>;
-	vpcie3v3-supply = <&vcc3v3_pcie30x1>;
+	vpcie3v3-supply = <&vcc3v3_minipcie>;
 	status = "okay";
 };