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ARM: dts: sun8i: Open FETA40i-C regulator aldo1

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The USB PHY in the Allwinner R40 SoC seems to rely on voltage on the
VCC-TVIN/OUT supply pins for proper operation, on top of its own supply
voltage on VCC-USB. Without a 3.3V voltage supplied to VCC-TV*, USB
operation becomes unstable and can result in disconnects.

The Forlinx FETA40i-C SoM connects both the VCC-TVOUT and VCC-TVIN pins
to the ALDO1 rail of the PMIC, so we need to enable that rail for USB
operation. Since there is no supply property in the DT bindings for
the USB core, we need to always enable the regulator.

This fixes unstable USB operation on boards using the Forlinx FETA40i-C
module.

Signed-off-by: Fuyao Kashizuku <fuyao@sjterm.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/ZYqRZev1g_mztff2@debian.cyg
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
This commit is contained in:
Fuyao Kashizuku 2023-12-26 16:40:05 +08:00 committed by Jernej Skrabec
parent b9957d2d7d
commit 6d8d1124d7
1 changed files with 7 additions and 0 deletions
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7
arch/arm/boot/dts/allwinner/sun8i-r40-feta40i.dtsi
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@ -42,6 +42,13 @@ &pio {
vcc-pg-supply = <&reg_dldo1>;
};
&reg_aldo1 {
regulator-always-on;
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-name = "vcc-3v3-tv-usb";
};
&reg_aldo2 {
regulator-always-on;
regulator-min-microvolt = <1800000>;