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arm64: dts: rockchip: Fix vcc_sdio regulator max voltage on Pinebook Pro

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The vcc_sdio regulator supports 1.8V to 3.4V output range according to
its datasheet.

The current DT incorrectly limits the max voltage to 3.0V. This limit
causes issues issues downstream with u-boot, which refuses to apply the
out-of range value, and falls back to the minimum in that range: 1.8V.
This is insufficient to power the SD card, so driver initialisation
fails and booting from it does not work.

Set regulator-max-microvolt to 3400000 µV to match hardware capability.
This matches the rk3399-orangepi for the same regulator.

Signed-off-by: Hugo Osvaldo Barrera <hugo@whynothugo.nl>
Reviewed-by: Dang Huynh <dang.huynh@mainlining.org>
Link: https://patch.msgid.link/20260519094439.7918-1-hugo@whynothugo.nl
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Hugo Osvaldo Barrera 2026-05-19 11:44:39 +02:00 committed by Heiko Stuebner
parent ff660109f4
commit 8545eda00f
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
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@ -526,7 +526,7 @@ vcc_sdio: LDO_REG4 {
regulator-always-on;
regulator-boot-on;
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <3000000>;
regulator-max-microvolt = <3400000>;
regulator-state-mem {
regulator-on-in-suspend;