From: Ahmad Fatoum Date: Sun, 5 Oct 2025 08:28:32 +0200 Subject: [PATCH] ARM: dts: stm32: lxa: drop unnecessary vusb_d/a-supply The LXA device trees are the only STM32MP1 device tree that specify vusb_d/usb_a-supply and apparently not for good reason: - vusb_d-supply (vdd_usb) is the same as the phy-supply for usbphyc_port1 - vusb_a-supply (reg18) is the same as vdda1v8-supply for usbphyc_port1 and usbphyc_port1 is linked to the usbotg_hs node via the phys property. Specifying the regulators in the &usbotg_hs node is thus superfluous and has been even found to be harmful in one instance: Linux v6.10 was found to lock up every 50-125 or so reboots on the LXA TAC when the DWC2 driver probe enables the regulators in bulk, unless both properties were removed. This issue was so far not reproducible on v6.17 (> 500 reboots), but as these properties are unnecessary and different from other STM32MP1 boards, remove them anyway. Upstream-Status: Submitted [https://lore.kernel.org/all/20251007-lxa-usb-dt-v1-1-cacde8088bb9@pengutronix.de/] Signed-off-by: Ahmad Fatoum --- arch/arm/boot/dts/st/stm32mp153c-lxa-fairytux2.dtsi | 3 --- arch/arm/boot/dts/st/stm32mp15xc-lxa-tac.dtsi | 3 --- 2 files changed, 6 deletions(-) diff --git a/arch/arm/boot/dts/st/stm32mp153c-lxa-fairytux2.dtsi b/arch/arm/boot/dts/st/stm32mp153c-lxa-fairytux2.dtsi index 9eeb9d6b5eb0..7d3a6a3b5d09 100644 --- a/arch/arm/boot/dts/st/stm32mp153c-lxa-fairytux2.dtsi +++ b/arch/arm/boot/dts/st/stm32mp153c-lxa-fairytux2.dtsi @@ -374,9 +374,6 @@ &usbotg_hs { phys = <&usbphyc_port1 0>; phy-names = "usb2-phy"; - vusb_d-supply = <&vdd_usb>; - vusb_a-supply = <®18>; - status = "okay"; }; diff --git a/arch/arm/boot/dts/st/stm32mp15xc-lxa-tac.dtsi b/arch/arm/boot/dts/st/stm32mp15xc-lxa-tac.dtsi index be0c355d3105..9179075f2ead 100644 --- a/arch/arm/boot/dts/st/stm32mp15xc-lxa-tac.dtsi +++ b/arch/arm/boot/dts/st/stm32mp15xc-lxa-tac.dtsi @@ -493,9 +493,6 @@ &usbotg_hs { phys = <&usbphyc_port1 0>; phy-names = "usb2-phy"; - vusb_d-supply = <&vdd_usb>; - vusb_a-supply = <®18>; - g-rx-fifo-size = <512>; g-np-tx-fifo-size = <32>; g-tx-fifo-size = <128 128 64 16 16 16 16 16>;