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arm64: dts: allwinner: pinephone: Set ALDO3 to exactly 3v0

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ALDO3 is used as the power supply for the LRADC keys voltage divider,
in addition to supplying AVCC and VCC-PLL. While AVCC and VCC-PLL will
accept any voltage between 2v7 and 3v3, LRADC needs a precise 3v0 input
to maintain the expected 2:3 ratio between the internal 2v0 reference
voltage and the external supply.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20201105054135.24860-3-samuel@sholland.org
This commit is contained in:
Samuel Holland 2020-11-04 23:41:31 -06:00 committed by Maxime Ripard
parent 37f7a7b680
commit 3cf9bf3b25
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GPG Key ID: E3EF0D6F671851C5
1 changed files with 2 additions and 2 deletions
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4
arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
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@ -270,8 +270,8 @@
&reg_aldo3 {
regulator-always-on;
regulator-min-microvolt = <2700000>;
regulator-max-microvolt = <3300000>;
regulator-min-microvolt = <3000000>;
regulator-max-microvolt = <3000000>;
regulator-name = "vcc-pll-avcc";
};