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The Avenger96 board comes in multiple regulator configurations. - rev.100 or rev.200 have Buck3 preconfigured to 3V3 operation on boot and contains extra Enpirion EP53A8LQI DCDC converter which supplies the IO. Reduce Buck3 voltage to 2V9 to not waste power. - rev.200L have Buck3 preconfigured to 1V8 operation and have no Enpirion EP53A8LQI DCDC anymore, the IO is supplied from Buck3. Configure the Buck3 voltage on this board per PMIC NVM settings and update buck3 voltage limits in DT passed to OS before booting OS to prevent potential hardware damage. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Patrice Chotard <patrice.chotard@foss.st.com> Cc: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
28 lines
659 B
Text
28 lines
659 B
Text
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
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/*
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* Copyright (C) Linaro Ltd 2019 - All Rights Reserved
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* Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
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* Copyright (C) 2020 Marek Vasut <marex@denx.de>
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*/
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/ {
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/* Enpirion EP3A8LQI U2 on the DHCOR */
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vdd_io: regulator-buck-io {
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compatible = "regulator-fixed";
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regulator-name = "buck-io";
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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regulator-always-on;
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regulator-boot-on;
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vin-supply = <&vdd>;
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};
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};
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&vdd {
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <2900000>;
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};
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&pwr_regulators {
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vdd-supply = <&vdd_io>;
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};
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