[PATCH v4 12/14] dts: sdm845-db845c: add u-boot fixups

[Caleb Connolly]

The USB VBUS supply for the type-A port is enabled via a GPIO regulator.
This is incorrectly modelled in Linux where only the PCIe dependency is
expressed. Add a U-Boot specific dtsi snippet so that this supply will
get enabled when initialising USB.

Signed-off-by: Caleb Connolly <caleb.connolly at linaro.org>
---
 arch/arm/dts/sdm845-db845c-u-boot.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm/dts/sdm845-db845c-u-boot.dtsi b/arch/arm/dts/sdm845-db845c-u-boot.dtsi
new file mode 100644
index 000000000000..8d55d5dd7632
--- /dev/null
+++ b/arch/arm/dts/sdm845-db845c-u-boot.dtsi
@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/* Needed for Linux to boot from USB, otherwise if PCIe driver is not in initramfs
+ * the VBUS supply will never get turned on.
+ * https://lore.kernel.org/linux-arm-msm/20240320122515.3243711-1-caleb.connolly@linaro.org/
+ */
+&pcie0_3p3v_dual {
+	regulator-always-on;
+};
+
+/* This GPIO must be turned on to enable the 5v VBUS
+ * supply on the USB port.
+ */
+&usb_2_dwc3 {
+	vbus-supply = <&pcie0_3p3v_dual>;
+};

-- 
2.44.0