[PATCH 1/2] ARM: dts: imx7-tqma7: correctly specify PMIC voltage constraints
From: Nora Schiffer
Date: Wed Sep 02 2026 - 04:42:14 EST
regulator-(min|max)-microvolt refer to the supported voltages according
to board design, not the possible range of the regulators themselves.
Update the configuration for the TQMa7x's PMIC and also add a comment
regarding the PMIC's VCC_SD switching feature.
Fixes: a80a1af6ec8a ("ARM: dts: tq imx7 common board support")
Signed-off-by: Nora Schiffer <nora.schiffer@xxxxxxxxxxxxxxx>
---
arch/arm/boot/dts/nxp/imx/imx7-tqma7.dtsi | 40 +++++++++++++----------
1 file changed, 23 insertions(+), 17 deletions(-)
diff --git a/arch/arm/boot/dts/nxp/imx/imx7-tqma7.dtsi b/arch/arm/boot/dts/nxp/imx/imx7-tqma7.dtsi
index e1f740edfb763..7f49c80fef4c6 100644
--- a/arch/arm/boot/dts/nxp/imx/imx7-tqma7.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx7-tqma7.dtsi
@@ -46,8 +46,8 @@ pfuze3000: pmic@8 {
regulators {
sw1a_reg: sw1a {
- regulator-min-microvolt = <700000>;
- regulator-max-microvolt = <3300000>;
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1225000>;
regulator-boot-on;
regulator-always-on;
regulator-ramp-delay = <6250>;
@@ -55,34 +55,33 @@ sw1a_reg: sw1a {
/* use sw1c_reg to align with pfuze100/pfuze200 */
sw1c_reg: sw1b {
- regulator-min-microvolt = <700000>;
- regulator-max-microvolt = <1475000>;
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1000000>;
regulator-boot-on;
regulator-always-on;
regulator-ramp-delay = <6250>;
};
sw2_reg: sw2 {
- regulator-min-microvolt = <1500000>;
- regulator-max-microvolt = <1850000>;
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
regulator-boot-on;
regulator-always-on;
};
sw3a_reg: sw3 {
- regulator-min-microvolt = <900000>;
- regulator-max-microvolt = <1650000>;
+ regulator-min-microvolt = <1350000>;
+ regulator-max-microvolt = <1350000>;
regulator-boot-on;
regulator-always-on;
};
swbst_reg: swbst {
- regulator-min-microvolt = <5000000>;
- regulator-max-microvolt = <5150000>;
+ /* Not connected and left unconfigured */
};
snvs_reg: vsnvs {
- regulator-min-microvolt = <1000000>;
+ regulator-min-microvolt = <3000000>;
regulator-max-microvolt = <3000000>;
regulator-boot-on;
regulator-always-on;
@@ -95,18 +94,25 @@ vref_reg: vrefddr {
vgen1_reg: vldo1 {
regulator-min-microvolt = <1800000>;
- regulator-max-microvolt = <3300000>;
+ regulator-max-microvolt = <1800000>;
regulator-always-on;
};
vgen2_reg: vldo2 {
- regulator-min-microvolt = <800000>;
- regulator-max-microvolt = <1550000>;
+ regulator-min-microvolt = <1500000>;
+ regulator-max-microvolt = <1500000>;
regulator-always-on;
};
vgen3_reg: vccsd {
- regulator-min-microvolt = <2850000>;
+ /*
+ * Specified values refer to 3.3V operation; voltage for 1.8V
+ * operation is derived from this.
+ *
+ * The base board should usually mux GPIO1_IO08 to SD1_VSELECT for
+ * automatic switching of SD card IO voltage.
+ */
+ regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
@@ -118,13 +124,13 @@ vgen4_reg: v33 {
};
vgen5_reg: vldo3 {
- regulator-min-microvolt = <1800000>;
+ regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
vgen6_reg: vldo4 {
- regulator-min-microvolt = <1800000>;
+ regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
--
TQ-Systems GmbH | Mühlstraße 2, Gut Delling | 82229 Seefeld, Germany
Amtsgericht München, HRB 105018
Geschäftsführer: Detlef Schneider, Rüdiger Stahl, Stefan Schneider
https://www.tq-group.com/