ARM: dts: sun8i: Open FETA40i-C regulator aldo1
authorFuyao Kashizuku <fuyao@sjterm.com>
Tue, 26 Dec 2023 08:40:05 +0000 (16:40 +0800)
committerJernej Skrabec <jernej.skrabec@gmail.com>
Fri, 23 Feb 2024 20:07:06 +0000 (21:07 +0100)
commit6d8d1124d7bb4a3341c9f8ed26ce5ed802fdbae6
tree0974de5da41ca1e912ac0a63c37d4f485333f07a
parentb9957d2d7d22001c94236e0e5b18a8d2a0981275
ARM: dts: sun8i: Open FETA40i-C regulator aldo1

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>
arch/arm/boot/dts/allwinner/sun8i-r40-feta40i.dtsi