[PATCH 1/2] ARM: dts: imx7-tqma7: correctly specify PMIC voltage constraints

[Nora Schiffer]

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 at ew.tq-group.com>
---
 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 at 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;
 			};
-- 
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Amtsgericht München, HRB 105018
Geschäftsführer: Detlef Schneider, Rüdiger Stahl, Stefan Schneider
https://www.tq-group.com/